850 lines
25 KiB
Diff
850 lines
25 KiB
Diff
From 10551a86fa76709587b48a644caeb78dd07690be Mon Sep 17 00:00:00 2001
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From: Nithish Mahalingam <nithish.mahalingam@intel.com>
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Date: Tue, 29 Dec 2009 22:42:48 +0530
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Subject: [PATCH 068/104] Adding Intel Moorestown PMIC Battery Driver
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PMIC Battery driver provides battery charging and battery gauge functionality
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on Intel Moorestown platform.
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Signed-off-by: Nithish Mahalingam <nithish.mahalingam@intel.com>
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---
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drivers/power/Kconfig | 7 +
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drivers/power/Makefile | 1 +
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drivers/power/pmic_battery.c | 799 ++++++++++++++++++++++++++++++++++++++++++
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3 files changed, 807 insertions(+), 0 deletions(-)
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create mode 100644 drivers/power/pmic_battery.c
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diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
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index d4b3d67..6936bc8 100644
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--- a/drivers/power/Kconfig
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+++ b/drivers/power/Kconfig
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@@ -124,4 +124,11 @@ config CHARGER_PCF50633
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help
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Say Y to include support for NXP PCF50633 Main Battery Charger.
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+config BATTERY_MRSTPMIC
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+ tristate "PMIC battery driver for Intel Moorestown platform"
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+ depends on SPI_MRST && LNW_IPC && USB_GADGET_LANGWELL
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+ help
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+ Say Y here to enable battery driver on Intel Moorestown
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+ platform.
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+
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endif # POWER_SUPPLY
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diff --git a/drivers/power/Makefile b/drivers/power/Makefile
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index 573597c..97af4b4 100644
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--- a/drivers/power/Makefile
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+++ b/drivers/power/Makefile
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@@ -31,3 +31,4 @@ obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o
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obj-$(CONFIG_BATTERY_DA9030) += da9030_battery.o
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obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o
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obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o
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+obj-$(CONFIG_BATTERY_MRSTPMIC) += pmic_battery.o
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diff --git a/drivers/power/pmic_battery.c b/drivers/power/pmic_battery.c
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new file mode 100644
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index 0000000..6e3c46a
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--- /dev/null
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+++ b/drivers/power/pmic_battery.c
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@@ -0,0 +1,799 @@
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+/*
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+ * pmic_battery.c - Intel Moorestown PMIC Battery Driver
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+ *
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+ * Copyright (C) 2009 Intel Corporation
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+ *
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+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; version 2 of the License.
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+ *
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+ * This program is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License along
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+ * with this program; if not, write to the Free Software Foundation, Inc.,
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+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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+ *
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+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+ * Author: Nithish Mahalingam <nithish.mahalingam@intel.com>
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/init.h>
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+#include <linux/err.h>
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+#include <linux/interrupt.h>
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+#include <linux/workqueue.h>
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+#include <linux/jiffies.h>
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+#include <linux/param.h>
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+#include <linux/device.h>
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+#include <linux/spi/spi.h>
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+#include <linux/power_supply.h>
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+
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+#include <asm/ipc_defs.h>
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+#include <linux/usb/langwell_udc.h>
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+
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+
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+MODULE_AUTHOR("Nithish Mahalingam <nithish.mahalingam@intel.com>");
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+MODULE_DESCRIPTION("Intel Moorestown PMIC Battery Driver");
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+MODULE_LICENSE("GPL");
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+
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+#define DRIVER_NAME "pmic_battery"
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+
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+/*********************************************************************
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+ * Generic defines
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+ *********************************************************************/
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+
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+static int pmicbatteryDebug;
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+module_param(pmicbatteryDebug, int, 0444);
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+MODULE_PARM_DESC(pmicbatteryDebug,
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+ "Flag to enable PMIC Battery debug messages.");
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+
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+#define PMIC_BATT_DEBUG (pmicbatteryDebug)
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+
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+#define PMIC_BATT_DRV_INFO_UPDATED 1
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+#define PMIC_BATT_PRESENT 1
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+#define PMIC_BATT_NOT_PRESENT 0
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+#define PMIC_USB_PRESENT PMIC_BATT_PRESENT
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+#define PMIC_USB_NOT_PRESENT PMIC_BATT_NOT_PRESENT
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+
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+/* pmic battery register related */
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+#define PMIC_BATT_CHR_SCHRGINT_ADDR 0xD2
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+#define PMIC_BATT_CHR_SBATOVP_MASK (1 << 1)
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+#define PMIC_BATT_CHR_STEMP_MASK (1 << 2)
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+#define PMIC_BATT_CHR_SCOMP_MASK (1 << 3)
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+#define PMIC_BATT_CHR_SUSBDET_MASK (1 << 4)
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+#define PMIC_BATT_CHR_SBATDET_MASK (1 << 5)
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+#define PMIC_BATT_CHR_SDCLMT_MASK (1 << 6)
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+#define PMIC_BATT_CHR_SUSBOVP_MASK (1 << 7)
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+#define PMIC_BATT_CHR_EXCPT_MASK 0xC6
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+#define PMIC_BATT_ADC_ACCCHRG_MASK (1 << 31)
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+#define PMIC_BATT_ADC_ACCCHRGVAL_MASK 0x7FFFFFFF
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+
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+/* pmic ipc related */
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+#define PMIC_BATT_CHR_IPC_CMDID 0xEF
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+#define PMIC_BATT_CHR_IPC_FCHRG_SUBID 0x4
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+#define PMIC_BATT_CHR_IPC_TCHRG_SUBID 0x6
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+
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+/* internal return values */
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+#define BATTSUCCESS 0
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+#define EBATTFAIL 1
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+#define EBATTERR 2
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+
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+/* types of battery charging */
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+enum batt_charge_type {
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+ BATT_USBOTG_500MA_CHARGE,
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+ BATT_USBOTG_TRICKLE_CHARGE,
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+};
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+
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+/* valid battery events */
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+enum batt_event {
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+ BATT_EVENT_BATOVP_EXCPT,
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+ BATT_EVENT_USBOVP_EXCPT,
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+ BATT_EVENT_TEMP_EXCPT,
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+ BATT_EVENT_DCLMT_EXCPT,
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+ BATT_EVENT_EXCPT
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+};
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+
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+/* battery cca value */
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+struct batt_cca_data {
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+ signed int cca_val;
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+};
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+
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+/* battery property structure */
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+struct batt_prop_data {
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+ unsigned int batt_capacity;
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+ char batt_chrg_crnt;
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+ char batt_chrg_volt;
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+ char batt_chrg_prot;
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+ char batt_chrg_prot2;
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+ char batt_chrg_timer;
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+} __attribute__((packed));
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+
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+
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+/*********************************************************************
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+ * Battery properties
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+ *********************************************************************/
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+
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+/*
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+ * pmic battery info
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+ */
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+struct pmic_power_module_info {
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+ bool is_dev_info_updated;
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+ struct spi_device *spi;
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+ /* pmic battery data */
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+ unsigned long update_time; /* jiffies when data read */
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+ unsigned int usb_is_present;
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+ unsigned int batt_is_present;
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+ unsigned int batt_health;
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+ unsigned int usb_health;
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+ unsigned int batt_status;
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+ unsigned int batt_charge_now; /* in mAS */
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+ unsigned int batt_prev_charge_full; /* in mAS */
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+ unsigned int batt_charge_rate; /* in units per second */
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+
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+ struct power_supply usb;
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+ struct power_supply batt;
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+ int irq; /* GPE_ID or IRQ# */
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+ struct workqueue_struct *monitor_wqueue;
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+ struct delayed_work monitor_battery;
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+ struct work_struct handler;
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+};
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+
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+static unsigned int delay_time = 2000; /* in ms */
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+
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+/*
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+ * pmic ac properties
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+ */
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+static enum power_supply_property pmic_usb_props[] = {
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+ POWER_SUPPLY_PROP_PRESENT,
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+ POWER_SUPPLY_PROP_HEALTH,
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+};
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+
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+/*
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+ * pmic battery properties
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+ */
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+static enum power_supply_property pmic_battery_props[] = {
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+ POWER_SUPPLY_PROP_STATUS,
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+ POWER_SUPPLY_PROP_HEALTH,
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+ POWER_SUPPLY_PROP_PRESENT,
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+ POWER_SUPPLY_PROP_CHARGE_NOW,
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+ POWER_SUPPLY_PROP_CHARGE_FULL,
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+ POWER_SUPPLY_PROP_CHARGE_AVG,
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+};
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+
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+
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+/**
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+ * pmic_battery_log_event - log battery events
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+ * @event: battery event to be logged
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+ * Context: can sleep
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+ *
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+ * There are multiple battery events which may be of interest to users;
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+ * this battery function logs the different battery events onto the
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+ * kernel log messages.
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+ */
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+static void pmic_battery_log_event(enum batt_event event)
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+{
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+ switch (event) {
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+ case BATT_EVENT_BATOVP_EXCPT:
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+ printk(KERN_WARNING "pmic-battery: battery overvoltage "
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+ "condition detected\n");
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+ break;
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+ case BATT_EVENT_USBOVP_EXCPT:
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+ printk(KERN_WARNING "pmic-battery: usb charger overvoltage "
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+ "condition detected\n");
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+ break;
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+ case BATT_EVENT_TEMP_EXCPT:
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+ printk(KERN_WARNING "pmic-battery: high battery temperature "
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+ "condition detected\n");
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+ break;
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+ case BATT_EVENT_DCLMT_EXCPT:
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+ printk(KERN_WARNING "pmic-battery: over battery charge "
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+ " current condition detected\n");
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+ break;
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+ default:
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+ printk(KERN_WARNING "pmic-battery: charger/battery "
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+ " exception detected\n");
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+ break;
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+ }
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+}
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+
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+/**
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+ * pmic_battery_read_status - read battery status information
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+ * @pbi: device info structure to update the read information
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+ * Context: can sleep
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+ *
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+ * PMIC power source information need to be updated based on the data read
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+ * from the PMIC battery registers.
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+ *
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+ */
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+static void pmic_battery_read_status(struct pmic_power_module_info *pbi)
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+{
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+ unsigned int update_time_intrvl = 0;
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+ unsigned int chrg_val = 0;
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+ struct ipc_pmic_reg_data pmic_batt_reg = {0};
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+ struct ipc_cmd_type pmic_batt_cmd = {0};
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+ struct batt_cca_data ccval = {0};
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+ struct batt_prop_data batt_prop = {0};
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+ int batt_present = 0;
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+ int usb_present = 0;
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+ int batt_exception = 0;
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+
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+ /* make sure the last batt_status read happened delay_time before */
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+ if (pbi->update_time && time_before(jiffies, pbi->update_time +
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+ msecs_to_jiffies(delay_time)))
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+ return;
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+
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+ update_time_intrvl = jiffies_to_msecs(jiffies - pbi->update_time);
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+ pbi->update_time = jiffies;
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+
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+ /* read coulomb counter registers and schrgint register */
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+
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+ pmic_batt_cmd.ioc = TRUE;
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+ pmic_batt_cmd.cmd = IPC_BATT_CCA_READ;
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+ if (ipc_config_cmd(pmic_batt_cmd, sizeof(struct batt_cca_data),
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+ &ccval)) {
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+ dev_warn(&pbi->spi->dev, "%s(): ipc config cmd failed\n",
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+ __func__);
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+ return;
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+ }
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+
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+ pmic_batt_reg.ioc = TRUE;
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+ pmic_batt_reg.pmic_reg_data[0].register_address =
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+ PMIC_BATT_CHR_SCHRGINT_ADDR;
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+ pmic_batt_reg.num_entries = 1;
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+
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+ if (ipc_pmic_register_read(&pmic_batt_reg)) {
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+ dev_warn(&pbi->spi->dev, "%s(): ipc pmic read failed\n",
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+ __func__);
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+ return;
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+ }
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+
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+ /*
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+ * set pmic_power_module_info members based on pmic register values
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+ * read.
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+ */
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+
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+ /* set batt_is_present */
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+ if (pmic_batt_reg.pmic_reg_data[0].value &
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+ PMIC_BATT_CHR_SBATDET_MASK) {
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+ pbi->batt_is_present = PMIC_BATT_PRESENT;
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+ batt_present = 1;
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+ } else {
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+ pbi->batt_is_present = PMIC_BATT_NOT_PRESENT;
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+ pbi->batt_health = POWER_SUPPLY_HEALTH_UNKNOWN;
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+ pbi->batt_status = POWER_SUPPLY_STATUS_UNKNOWN;
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+ }
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+
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+ /* set batt_health */
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+ if (batt_present) {
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+ if (pmic_batt_reg.pmic_reg_data[0].value &
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+ PMIC_BATT_CHR_SBATOVP_MASK) {
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+ pbi->batt_health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
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+ pbi->batt_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
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+ pmic_battery_log_event(BATT_EVENT_BATOVP_EXCPT);
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+ batt_exception = 1;
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+ } else if (pmic_batt_reg.pmic_reg_data[0].value &
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+ PMIC_BATT_CHR_SDCLMT_MASK) {
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+ pbi->batt_health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
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+ pbi->batt_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
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+ pmic_battery_log_event(BATT_EVENT_DCLMT_EXCPT);
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+ batt_exception = 1;
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+ } else if (pmic_batt_reg.pmic_reg_data[0].value &
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+ PMIC_BATT_CHR_STEMP_MASK) {
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+ pbi->batt_health = POWER_SUPPLY_HEALTH_OVERHEAT;
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+ pbi->batt_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
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+ pmic_battery_log_event(BATT_EVENT_TEMP_EXCPT);
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+ batt_exception = 1;
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+ } else {
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+ pbi->batt_health = POWER_SUPPLY_HEALTH_GOOD;
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+ }
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+ }
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+
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+ /* set usb_is_present */
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+ if (pmic_batt_reg.pmic_reg_data[0].value &
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+ PMIC_BATT_CHR_SUSBDET_MASK) {
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+ pbi->usb_is_present = PMIC_USB_PRESENT;
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+ usb_present = 1;
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+ } else {
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+ pbi->usb_is_present = PMIC_USB_NOT_PRESENT;
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+ pbi->usb_health = POWER_SUPPLY_HEALTH_UNKNOWN;
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+ }
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+
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+ if (usb_present) {
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+ if (pmic_batt_reg.pmic_reg_data[0].value &
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+ PMIC_BATT_CHR_SUSBOVP_MASK) {
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+ pbi->usb_health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
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+ pmic_battery_log_event(BATT_EVENT_USBOVP_EXCPT);
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+ } else {
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+ pbi->usb_health = POWER_SUPPLY_HEALTH_GOOD;
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+ }
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+ }
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+
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+ chrg_val = ccval.cca_val & PMIC_BATT_ADC_ACCCHRGVAL_MASK;
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+
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+ /* set batt_prev_charge_full to battery capacity the first time */
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+ if (!pbi->is_dev_info_updated) {
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+ pmic_batt_cmd.ioc = TRUE;
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+ pmic_batt_cmd.cmd = IPC_BATT_GET_PROP;
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+ if (ipc_config_cmd(pmic_batt_cmd,
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+ sizeof(struct batt_prop_data), &batt_prop)) {
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+ dev_warn(&pbi->spi->dev, "%s(): ipc config cmd "
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+ "failed\n", __func__);
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+ return;
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+ }
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+ pbi->batt_prev_charge_full = batt_prop.batt_capacity;
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+ }
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+
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+ /* set batt_status */
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+ if ((batt_present) && (!batt_exception)) {
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+ if (pmic_batt_reg.pmic_reg_data[0].value &
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+ PMIC_BATT_CHR_SCOMP_MASK) {
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+ pbi->batt_status = POWER_SUPPLY_STATUS_FULL;
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+ pbi->batt_prev_charge_full = chrg_val;
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+ } else if (ccval.cca_val & PMIC_BATT_ADC_ACCCHRG_MASK) {
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+ pbi->batt_status = POWER_SUPPLY_STATUS_DISCHARGING;
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+ } else {
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+ pbi->batt_status = POWER_SUPPLY_STATUS_CHARGING;
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+ }
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+ }
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+
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+ /* set batt_charge_rate */
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+ if ((pbi->is_dev_info_updated) && (batt_present) && (!batt_exception)) {
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+ if (pbi->batt_status == POWER_SUPPLY_STATUS_DISCHARGING) {
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+ if (pbi->batt_charge_now - chrg_val) {
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+ pbi->batt_charge_rate = ((pbi->batt_charge_now -
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+ chrg_val) * 1000 * 60) /
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+ update_time_intrvl;
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+ }
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+ } else if (pbi->batt_status == POWER_SUPPLY_STATUS_CHARGING) {
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+ if (chrg_val - pbi->batt_charge_now) {
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+ pbi->batt_charge_rate = ((chrg_val -
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+ pbi->batt_charge_now) * 1000 * 60) /
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+ update_time_intrvl;
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+ }
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+ } else
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+ pbi->batt_charge_rate = 0;
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+ } else {
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+ pbi->batt_charge_rate = -1;
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+ }
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+
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+ /* batt_charge_now */
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+ if ((batt_present) && (!batt_exception))
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+ pbi->batt_charge_now = chrg_val;
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+ else
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+ pbi->batt_charge_now = -1;
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+
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+ pbi->is_dev_info_updated = PMIC_BATT_DRV_INFO_UPDATED;
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+}
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+
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+/**
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+ * pmic_usb_get_property - usb power source get property
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+ * @psy: usb power supply context
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+ * @psp: usb power source property
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+ * @val: usb power source property value
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+ * Context: can sleep
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+ *
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+ * PMIC usb power source property needs to be provided to power_supply
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+ * subsytem for it to provide the information to users.
|
|
+ */
|
|
+static int pmic_usb_get_property(struct power_supply *psy,
|
|
+ enum power_supply_property psp,
|
|
+ union power_supply_propval *val)
|
|
+{
|
|
+ struct pmic_power_module_info *pbi = container_of(psy,
|
|
+ struct pmic_power_module_info, usb);
|
|
+
|
|
+ /* update pmic_power_module_info members */
|
|
+ pmic_battery_read_status(pbi);
|
|
+
|
|
+ switch (psp) {
|
|
+ case POWER_SUPPLY_PROP_PRESENT:
|
|
+ val->intval = pbi->usb_is_present;
|
|
+ break;
|
|
+ case POWER_SUPPLY_PROP_HEALTH:
|
|
+ val->intval = pbi->usb_health;
|
|
+ break;
|
|
+ default:
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+/**
|
|
+ * pmic_battery_get_property - battery power source get property
|
|
+ * @psy: battery power supply context
|
|
+ * @psp: battery power source property
|
|
+ * @val: battery power source property value
|
|
+ * Context: can sleep
|
|
+ *
|
|
+ * PMIC battery power source property needs to be provided to power_supply
|
|
+ * subsytem for it to provide the information to users.
|
|
+ */
|
|
+static int pmic_battery_get_property(struct power_supply *psy,
|
|
+ enum power_supply_property psp,
|
|
+ union power_supply_propval *val)
|
|
+{
|
|
+ struct pmic_power_module_info *pbi = container_of(psy,
|
|
+ struct pmic_power_module_info, batt);
|
|
+
|
|
+ /* update pmic_power_module_info members */
|
|
+ pmic_battery_read_status(pbi);
|
|
+
|
|
+ switch (psp) {
|
|
+ case POWER_SUPPLY_PROP_STATUS:
|
|
+ val->intval = pbi->batt_status;
|
|
+ break;
|
|
+ case POWER_SUPPLY_PROP_HEALTH:
|
|
+ val->intval = pbi->batt_health;
|
|
+ break;
|
|
+ case POWER_SUPPLY_PROP_PRESENT:
|
|
+ val->intval = pbi->batt_is_present;
|
|
+ break;
|
|
+ case POWER_SUPPLY_PROP_CHARGE_NOW:
|
|
+ val->intval = pbi->batt_charge_now;
|
|
+ break;
|
|
+ case POWER_SUPPLY_PROP_CHARGE_FULL:
|
|
+ val->intval = pbi->batt_prev_charge_full;
|
|
+ break;
|
|
+ case POWER_SUPPLY_PROP_CHARGE_AVG:
|
|
+ val->intval = pbi->batt_charge_rate;
|
|
+ break;
|
|
+ default:
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+/**
|
|
+ * pmic_battery_monitor - monitor battery status
|
|
+ * @work: work structure
|
|
+ * Context: can sleep
|
|
+ *
|
|
+ * PMIC battery status needs to be monitored for any change
|
|
+ * and information needs to be frequently updated.
|
|
+ */
|
|
+static void pmic_battery_monitor(struct work_struct *work)
|
|
+{
|
|
+ struct pmic_power_module_info *pbi = container_of(work,
|
|
+ struct pmic_power_module_info, monitor_battery.work);
|
|
+
|
|
+ /* update pmic_power_module_info members */
|
|
+ pmic_battery_read_status(pbi);
|
|
+ queue_delayed_work(pbi->monitor_wqueue, &pbi->monitor_battery, HZ * 10);
|
|
+}
|
|
+
|
|
+/**
|
|
+ * pmic_battery_set_charger - set battery charger
|
|
+ * @pbi: device info structure
|
|
+ * @chrg: charge mode to set battery charger in
|
|
+ * Context: can sleep
|
|
+ *
|
|
+ * PMIC battery charger needs to be enabled based on the usb charge
|
|
+ * capabilities connected to the platform.
|
|
+ */
|
|
+static int pmic_battery_set_charger(struct pmic_power_module_info *pbi,
|
|
+ enum batt_charge_type chrg)
|
|
+{
|
|
+ int retval;
|
|
+
|
|
+ /* set usblmt bits and chrgcntl register bits appropriately */
|
|
+ switch (chrg) {
|
|
+ case BATT_USBOTG_500MA_CHARGE:
|
|
+ retval = lnw_ipc_single_cmd(PMIC_BATT_CHR_IPC_CMDID,
|
|
+ PMIC_BATT_CHR_IPC_FCHRG_SUBID, 0, 0);
|
|
+ break;
|
|
+ case BATT_USBOTG_TRICKLE_CHARGE:
|
|
+ retval = lnw_ipc_single_cmd(PMIC_BATT_CHR_IPC_CMDID,
|
|
+ PMIC_BATT_CHR_IPC_TCHRG_SUBID, 0, 0);
|
|
+ break;
|
|
+ default:
|
|
+ dev_warn(&pbi->spi->dev, "%s(): out of range usb charger "
|
|
+ "charge detected\n", __func__);
|
|
+ return -EBATTFAIL;
|
|
+ }
|
|
+
|
|
+ if (retval) {
|
|
+ dev_warn(&pbi->spi->dev, "%s(): ipc pmic read failed\n",
|
|
+ __func__);
|
|
+ return -EBATTFAIL;
|
|
+ }
|
|
+
|
|
+ return BATTSUCCESS;
|
|
+}
|
|
+
|
|
+/**
|
|
+ * pmic_battery_interrupt_handler - pmic battery interrupt handler
|
|
+ * Context: interrupt context
|
|
+ *
|
|
+ * PMIC battery interrupt handler which will be called with either
|
|
+ * battery full condition occurs or usb otg & battery connect
|
|
+ * condition occurs.
|
|
+ */
|
|
+static irqreturn_t pmic_battery_interrupt_handler(int id, void *dev)
|
|
+{
|
|
+ struct pmic_power_module_info *pbi =
|
|
+ (struct pmic_power_module_info *)dev;
|
|
+
|
|
+ schedule_work(&pbi->handler);
|
|
+
|
|
+ return IRQ_HANDLED;
|
|
+}
|
|
+
|
|
+/**
|
|
+ * pmic_battery_handle_intrpt - pmic battery service interrupt
|
|
+ * @work: work structure
|
|
+ * Context: can sleep
|
|
+ *
|
|
+ * PMIC battery needs to either update the battery status as full
|
|
+ * if it detects battery full condition caused the interrupt or needs
|
|
+ * to enable battery charger if it detects usb and battery detect
|
|
+ * caused the source of interrupt.
|
|
+ */
|
|
+static void pmic_battery_handle_intrpt(struct work_struct *work)
|
|
+{
|
|
+ struct ipc_pmic_reg_data pmic_batt_reg = {0};
|
|
+ struct pmic_power_module_info *pbi = container_of(work,
|
|
+ struct pmic_power_module_info, handler);
|
|
+ int power = 0;
|
|
+ enum batt_charge_type chrg;
|
|
+ int retval = 0;
|
|
+
|
|
+ /* check if pmic_power_module_info is initialized */
|
|
+ if (!pbi)
|
|
+ return;
|
|
+
|
|
+ /* read schrgint register to interpret cause of interrupt */
|
|
+ pmic_batt_reg.ioc = TRUE;
|
|
+ pmic_batt_reg.pmic_reg_data[0].register_address =
|
|
+ PMIC_BATT_CHR_SCHRGINT_ADDR;
|
|
+ pmic_batt_reg.num_entries = 1;
|
|
+
|
|
+ if (ipc_pmic_register_read(&pmic_batt_reg)) {
|
|
+ dev_warn(&pbi->spi->dev, "%s(): ipc pmic read failed\n",
|
|
+ __func__);
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ /* find the cause of the interrupt */
|
|
+
|
|
+ if (pmic_batt_reg.pmic_reg_data[0].value & PMIC_BATT_CHR_SBATDET_MASK) {
|
|
+ pbi->batt_is_present = PMIC_BATT_PRESENT;
|
|
+ } else {
|
|
+ pbi->batt_is_present = PMIC_BATT_NOT_PRESENT;
|
|
+ pbi->batt_health = POWER_SUPPLY_HEALTH_UNKNOWN;
|
|
+ pbi->batt_status = POWER_SUPPLY_STATUS_UNKNOWN;
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ if (pmic_batt_reg.pmic_reg_data[0].value &
|
|
+ PMIC_BATT_CHR_EXCPT_MASK) {
|
|
+ pbi->batt_health = POWER_SUPPLY_HEALTH_UNKNOWN;
|
|
+ pbi->batt_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
|
|
+ pbi->usb_health = POWER_SUPPLY_HEALTH_UNKNOWN;
|
|
+ pmic_battery_log_event(BATT_EVENT_EXCPT);
|
|
+ return;
|
|
+ } else {
|
|
+ pbi->batt_health = POWER_SUPPLY_HEALTH_GOOD;
|
|
+ pbi->usb_health = POWER_SUPPLY_HEALTH_GOOD;
|
|
+ }
|
|
+
|
|
+ if (pmic_batt_reg.pmic_reg_data[0].value & PMIC_BATT_CHR_SCOMP_MASK) {
|
|
+ struct ipc_cmd_type pmic_batt_cmd = {0};
|
|
+ struct batt_cca_data ccval = {0};
|
|
+
|
|
+ pbi->batt_status = POWER_SUPPLY_STATUS_FULL;
|
|
+ pmic_batt_cmd.ioc = TRUE;
|
|
+ pmic_batt_cmd.cmd = IPC_BATT_CCA_READ;
|
|
+ if (ipc_config_cmd(pmic_batt_cmd,
|
|
+ sizeof(struct batt_cca_data), &ccval)) {
|
|
+ dev_warn(&pbi->spi->dev, "%s(): ipc config cmd "
|
|
+ "failed\n", __func__);
|
|
+ return;
|
|
+ }
|
|
+ pbi->batt_prev_charge_full = ccval.cca_val &
|
|
+ PMIC_BATT_ADC_ACCCHRGVAL_MASK;
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ if (pmic_batt_reg.pmic_reg_data[0].value & PMIC_BATT_CHR_SUSBDET_MASK) {
|
|
+ pbi->usb_is_present = PMIC_USB_PRESENT;
|
|
+ } else {
|
|
+ pbi->usb_is_present = PMIC_USB_NOT_PRESENT;
|
|
+ pbi->usb_health = POWER_SUPPLY_HEALTH_UNKNOWN;
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ /* setup battery charging */
|
|
+
|
|
+ /* check usb otg power capability and set charger accordingly */
|
|
+ retval = langwell_udc_maxpower(&power);
|
|
+ if (retval) {
|
|
+ dev_warn(&pbi->spi->dev, "%s(): usb otg power query failed "
|
|
+ "with error code %d\n", __func__, retval);
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ if (power >= 500)
|
|
+ chrg = BATT_USBOTG_500MA_CHARGE;
|
|
+ else
|
|
+ chrg = BATT_USBOTG_TRICKLE_CHARGE;
|
|
+
|
|
+ /* enable battery charging */
|
|
+ if (pmic_battery_set_charger(pbi, chrg)) {
|
|
+ dev_warn(&pbi->spi->dev, "%s(): failed to setup battery "
|
|
+ "charging\n", __func__);
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ if (PMIC_BATT_DEBUG)
|
|
+ printk(KERN_INFO "pmic-battery: %s() - setting up battery "
|
|
+ "charger successful\n", __func__);
|
|
+}
|
|
+
|
|
+/**
|
|
+ * pmic_battery_probe - pmic battery initialize
|
|
+ * @spi: pmic battery spi structure
|
|
+ * Context: can sleep
|
|
+ *
|
|
+ * PMIC battery initializes its internal data structue and other
|
|
+ * infrastructure components for it to work as expected.
|
|
+ */
|
|
+static int pmic_battery_probe(struct spi_device *spi)
|
|
+{
|
|
+ int retval = 0;
|
|
+ struct pmic_power_module_info *pbi = 0;
|
|
+
|
|
+ if (PMIC_BATT_DEBUG)
|
|
+ printk(KERN_INFO "pmic-battery: %s() - found pmic battery "
|
|
+ "device\n", __func__);
|
|
+
|
|
+ pbi = kzalloc(sizeof(*pbi), GFP_KERNEL);
|
|
+ if (!pbi) {
|
|
+ dev_err(&spi->dev, "%s(): memory allocation failed\n",
|
|
+ __func__);
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ pbi->spi = spi;
|
|
+ pbi->irq = spi->irq;
|
|
+ dev_set_drvdata(&spi->dev, pbi);
|
|
+
|
|
+ /* initialize all required framework before enabling interrupts */
|
|
+ INIT_WORK(&pbi->handler, (void *)pmic_battery_handle_intrpt);
|
|
+ INIT_DELAYED_WORK(&pbi->monitor_battery, pmic_battery_monitor);
|
|
+ pbi->monitor_wqueue =
|
|
+ create_singlethread_workqueue(dev_name(&spi->dev));
|
|
+ if (!pbi->monitor_wqueue) {
|
|
+ dev_err(&spi->dev, "%s(): wqueue init failed\n", __func__);
|
|
+ retval = -ESRCH;
|
|
+ goto wqueue_failed;
|
|
+ }
|
|
+
|
|
+ /* register interrupt */
|
|
+ retval = request_irq(pbi->irq, pmic_battery_interrupt_handler,
|
|
+ 0, DRIVER_NAME, pbi);
|
|
+ if (retval) {
|
|
+ dev_err(&spi->dev, "%s(): cannot get IRQ\n", __func__);
|
|
+ goto requestirq_failed;
|
|
+ }
|
|
+
|
|
+ /* register pmic-batt with power supply subsystem */
|
|
+ pbi->batt.name = "pmic-batt";
|
|
+ pbi->batt.type = POWER_SUPPLY_TYPE_BATTERY;
|
|
+ pbi->batt.properties = pmic_battery_props;
|
|
+ pbi->batt.num_properties = ARRAY_SIZE(pmic_battery_props);
|
|
+ pbi->batt.get_property = pmic_battery_get_property;
|
|
+ retval = power_supply_register(&spi->dev, &pbi->batt);
|
|
+ if (retval) {
|
|
+ dev_err(&spi->dev, "%s(): failed to register pmic battery "
|
|
+ "device with power supply subsystem\n",
|
|
+ __func__);
|
|
+ goto power_reg_failed;
|
|
+ }
|
|
+
|
|
+ if (PMIC_BATT_DEBUG)
|
|
+ printk(KERN_INFO "pmic-battery: %s() - pmic battery device "
|
|
+ "registration with power supply subsystem "
|
|
+ "successful\n", __func__);
|
|
+
|
|
+ queue_delayed_work(pbi->monitor_wqueue, &pbi->monitor_battery, HZ * 1);
|
|
+
|
|
+ /* register pmic-usb with power supply subsystem */
|
|
+ pbi->usb.name = "pmic-usb";
|
|
+ pbi->usb.type = POWER_SUPPLY_TYPE_USB;
|
|
+ pbi->usb.properties = pmic_usb_props;
|
|
+ pbi->usb.num_properties = ARRAY_SIZE(pmic_usb_props);
|
|
+ pbi->usb.get_property = pmic_usb_get_property;
|
|
+ retval = power_supply_register(&spi->dev, &pbi->usb);
|
|
+ if (retval) {
|
|
+ dev_err(&spi->dev, "%s(): failed to register pmic usb "
|
|
+ "device with power supply subsystem\n",
|
|
+ __func__);
|
|
+ goto power_reg_failed_1;
|
|
+ }
|
|
+
|
|
+ if (PMIC_BATT_DEBUG)
|
|
+ printk(KERN_INFO "pmic-battery: %s() - pmic usb device "
|
|
+ "registration with power supply subsystem successful\n",
|
|
+ __func__);
|
|
+
|
|
+ return retval;
|
|
+
|
|
+power_reg_failed_1:
|
|
+ power_supply_unregister(&pbi->batt);
|
|
+power_reg_failed:
|
|
+ cancel_rearming_delayed_workqueue(pbi->monitor_wqueue,
|
|
+ &pbi->monitor_battery);
|
|
+requestirq_failed:
|
|
+ destroy_workqueue(pbi->monitor_wqueue);
|
|
+wqueue_failed:
|
|
+ kfree(pbi);
|
|
+
|
|
+ return retval;
|
|
+}
|
|
+
|
|
+/**
|
|
+ * pmic_battery_remove - pmic battery finalize
|
|
+ * @spi: pmic battery spi device structure
|
|
+ * Context: can sleep
|
|
+ *
|
|
+ * PMIC battery finalizes its internal data structue and other
|
|
+ * infrastructure components that it initialized in
|
|
+ * pmic_battery_probe.
|
|
+ */
|
|
+static int pmic_battery_remove(struct spi_device *spi)
|
|
+{
|
|
+ struct pmic_power_module_info *pbi = dev_get_drvdata(&spi->dev);
|
|
+
|
|
+ if (pbi) {
|
|
+ free_irq(pbi->irq, pbi);
|
|
+
|
|
+ cancel_rearming_delayed_workqueue(pbi->monitor_wqueue,
|
|
+ &pbi->monitor_battery);
|
|
+ destroy_workqueue(pbi->monitor_wqueue);
|
|
+
|
|
+ power_supply_unregister(&pbi->usb);
|
|
+ power_supply_unregister(&pbi->batt);
|
|
+
|
|
+ flush_scheduled_work();
|
|
+
|
|
+ kfree(pbi);
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+/*********************************************************************
|
|
+ * Driver initialisation and finalization
|
|
+ *********************************************************************/
|
|
+
|
|
+static struct spi_driver pmic_battery_driver = {
|
|
+ .driver = {
|
|
+ .name = DRIVER_NAME,
|
|
+ .bus = &spi_bus_type,
|
|
+ .owner = THIS_MODULE,
|
|
+ },
|
|
+ .probe = pmic_battery_probe,
|
|
+ .remove = __devexit_p(pmic_battery_remove),
|
|
+};
|
|
+
|
|
+
|
|
+static int __init pmic_battery_module_init(void)
|
|
+{
|
|
+ return spi_register_driver(&pmic_battery_driver);
|
|
+}
|
|
+
|
|
+static void __exit pmic_battery_module_exit(void)
|
|
+{
|
|
+ spi_unregister_driver(&pmic_battery_driver);
|
|
+}
|
|
+
|
|
+module_init(pmic_battery_module_init);
|
|
+module_exit(pmic_battery_module_exit);
|
|
--
|
|
1.6.2.5
|
|
|