86 lines
2.6 KiB
Diff
86 lines
2.6 KiB
Diff
To: nico@cam.org
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Cc: linux-arm-kernel@lists.arm.linux.org.uk
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Subject: [PATCH] Kirkwood: Hook up I2C
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Hook up I2C on Marvell Kirkwood. Tested on a QNAP TS-219 which has RTC
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connected through I2C.
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Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
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--- a/arch/arm/mach-kirkwood/common.c
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+++ b/arch/arm/mach-kirkwood/common.c
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@@ -14,6 +14,7 @@
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#include <linux/serial_8250.h>
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#include <linux/mbus.h>
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#include <linux/mv643xx_eth.h>
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+#include <linux/mv643xx_i2c.h>
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#include <linux/ata_platform.h>
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#include <linux/spi/orion_spi.h>
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#include <net/dsa.h>
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@@ -371,6 +372,45 @@ void __init kirkwood_spi_init()
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/*****************************************************************************
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+ * I2C
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+ ****************************************************************************/
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+static struct mv64xxx_i2c_pdata kirkwood_i2c_pdata = {
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+ .freq_m = 8, /* assumes 166 MHz TCLK */
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+ .freq_n = 3,
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+ .timeout = 1000, /* Default timeout of 1 second */
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+};
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+
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+static struct resource kirkwood_i2c_resources[] = {
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+ {
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+ .name = "i2c base",
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+ .start = I2C_PHYS_BASE,
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+ .end = I2C_PHYS_BASE + 0x1f,
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+ .flags = IORESOURCE_MEM,
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+ }, {
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+ .name = "i2c irq",
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+ .start = IRQ_KIRKWOOD_TWSI,
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+ .end = IRQ_KIRKWOOD_TWSI,
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+ .flags = IORESOURCE_IRQ,
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+ },
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+};
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+
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+static struct platform_device kirkwood_i2c = {
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+ .name = MV64XXX_I2C_CTLR_NAME,
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+ .id = 0,
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+ .num_resources = ARRAY_SIZE(kirkwood_i2c_resources),
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+ .resource = kirkwood_i2c_resources,
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+ .dev = {
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+ .platform_data = &kirkwood_i2c_pdata,
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+ },
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+};
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+
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+void __init kirkwood_i2c_init(void)
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+{
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+ platform_device_register(&kirkwood_i2c);
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+}
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+
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+
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+/*****************************************************************************
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* UART0
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****************************************************************************/
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static struct plat_serial8250_port kirkwood_uart0_data[] = {
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--- a/arch/arm/mach-kirkwood/common.h
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+++ b/arch/arm/mach-kirkwood/common.h
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@@ -37,6 +37,7 @@ void kirkwood_pcie_init(void);
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void kirkwood_sata_init(struct mv_sata_platform_data *sata_data);
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void kirkwood_sdio_init(struct mvsdio_platform_data *mvsdio_data);
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void kirkwood_spi_init(void);
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+void kirkwood_i2c_init(void);
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void kirkwood_uart0_init(void);
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void kirkwood_uart1_init(void);
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--- a/arch/arm/mach-kirkwood/include/mach/kirkwood.h
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+++ b/arch/arm/mach-kirkwood/include/mach/kirkwood.h
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@@ -93,6 +93,7 @@
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#define DEVICE_ID (DEV_BUS_VIRT_BASE | 0x0034)
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#define RTC_PHYS_BASE (DEV_BUS_PHYS_BASE | 0x0300)
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#define SPI_PHYS_BASE (DEV_BUS_PHYS_BASE | 0x0600)
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+#define I2C_PHYS_BASE (DEV_BUS_PHYS_BASE | 0x1000)
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#define UART0_PHYS_BASE (DEV_BUS_PHYS_BASE | 0x2000)
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#define UART0_VIRT_BASE (DEV_BUS_VIRT_BASE | 0x2000)
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#define UART1_PHYS_BASE (DEV_BUS_PHYS_BASE | 0x2100)
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