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i2c: Codingstyle cleanup for i2c evb64260 board driver 

There are some magic constants in this drivers, which I cannot
fixup ... Eran, can you help here?

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Eran Man <eran@nbase.co.il>
This commit is contained in:
Heiko Schocher 2011-11-17 07:57:20 +01:00 committed by Wolfgang Denk
parent 3dab3e0e67
commit 7d5ff54fde
1 changed files with 12 additions and 12 deletions
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24
board/evb64260/i2c.c
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@ -20,25 +20,25 @@ static void
i2c_init(int speed, int slaveaddr)
{
unsigned int n, m, freq, margin, power;
unsigned int actualN = 0, actualM = 0;
unsigned int actualn = 0, actualm = 0;
unsigned int control, status;
unsigned int minMargin = 0xffffffff;
unsigned int minmargin = 0xffffffff;
unsigned int tclk = 125000000;
DP(puts("i2c_init\n"));
for (n = 0 ; n < 8 ; n++) {
for (m = 0 ; m < 16 ; m++) {
power = 2<<n; /* power = 2^(n+1) */
freq = tclk/(10*(m+1)*power);
power = 2 << n; /* power = 2^(n+1) */
freq = tclk / (10 * (m + 1) * power);
if (speed > freq)
margin = speed - freq;
else
margin = freq - speed;
if (margin < minMargin) {
minMargin = margin;
actualN = n;
actualM = m;
if (margin < minmargin) {
minmargin = margin;
actualn = n;
actualm = m;
}
}
}
@ -55,7 +55,7 @@ i2c_init(int speed, int slaveaddr)
DP(puts("set baudrate\n"));
GT_REG_WRITE(I2C_STATUS_BAUDE_RATE, (actualM << 3) | actualN);
GT_REG_WRITE(I2C_STATUS_BAUDE_RATE, (actualm << 3) | actualn);
GT_REG_WRITE(I2C_CONTROL, (0x1 << 2) | (0x1 << 6));
udelay(I2C_DELAY * 10);
@ -257,11 +257,11 @@ i2c_read(uchar dev_addr, unsigned int offset, int len, uchar *data,
int ten_bit)
{
uchar status = 0;
unsigned int i2cFreq = 400000;
unsigned int i2cfreq = 400000;
DP(puts("i2c_read\n"));
i2c_init(i2cFreq, 0);
i2c_init(i2cfreq, 0);
status = i2c_start();
@ -280,7 +280,7 @@ i2c_read(uchar dev_addr, unsigned int offset, int len, uchar *data,
return status;
}
i2c_init(i2cFreq, 0);
i2c_init(i2cfreq, 0);
status = i2c_start();
if (status) {