diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-11-20 13:46:07 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-02-12 18:32:39 +0100 |
| commit | 6fff3da998ac3cc9ed8a84bf4f19911bd63c8c32 (patch) | |
| tree | 97c80144615bbc9ff8c4baee20feb1cf2af20fef /drivers/i2c/busses/i2c-pnx.c | |
| parent | ARM: PNX4008: convert i2c-pnx to use clk API enable/disable calls (diff) | |
| download | linux-6fff3da998ac3cc9ed8a84bf4f19911bd63c8c32.tar.xz linux-6fff3da998ac3cc9ed8a84bf4f19911bd63c8c32.zip | |
ARM: PNX4008: get i2c clock rate from clk API
Acked-by: Vitaly Wool <vitalywool@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/i2c/busses/i2c-pnx.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-pnx.c | 15 |
1 files changed, 4 insertions, 11 deletions
diff --git a/drivers/i2c/busses/i2c-pnx.c b/drivers/i2c/busses/i2c-pnx.c index 29f91774c4df..bfcd079e885c 100644 --- a/drivers/i2c/busses/i2c-pnx.c +++ b/drivers/i2c/busses/i2c-pnx.c @@ -31,7 +31,6 @@ #define I2C_PNX_TIMEOUT 10 /* msec */ #define I2C_PNX_SPEED_KHZ 100 #define I2C_PNX_REGION_SIZE 0x100 -#define PNX_DEFAULT_FREQ 13 /* MHz */ static inline int wait_timeout(long timeout, struct i2c_pnx_algo_data *data) { @@ -578,7 +577,7 @@ static int __devinit i2c_pnx_probe(struct platform_device *pdev) unsigned long tmp; int ret = 0; struct i2c_pnx_algo_data *alg_data; - int freq_mhz; + unsigned long freq; struct i2c_pnx_data *i2c_pnx = pdev->dev.platform_data; if (!i2c_pnx || !i2c_pnx->adapter) { @@ -599,14 +598,6 @@ static int __devinit i2c_pnx_probe(struct platform_device *pdev) goto out_drvdata; } - if (i2c_pnx->calculate_input_freq) - freq_mhz = i2c_pnx->calculate_input_freq(pdev); - else { - freq_mhz = PNX_DEFAULT_FREQ; - dev_info(&pdev->dev, "Setting bus frequency to default value: " - "%d MHz\n", freq_mhz); - } - init_timer(&alg_data->mif.timer); alg_data->mif.timer.function = i2c_pnx_timeout; alg_data->mif.timer.data = (unsigned long)i2c_pnx->adapter; @@ -632,6 +623,8 @@ static int __devinit i2c_pnx_probe(struct platform_device *pdev) if (ret) goto out_unmap; + freq = clk_get_rate(alg_data->clk); + /* * Clock Divisor High This value is the number of system clocks * the serial clock (SCL) will be high. @@ -643,7 +636,7 @@ static int __devinit i2c_pnx_probe(struct platform_device *pdev) * the deglitching filter length. */ - tmp = ((freq_mhz * 1000) / I2C_PNX_SPEED_KHZ) / 2 - 2; + tmp = ((freq / 1000) / I2C_PNX_SPEED_KHZ) / 2 - 2; iowrite32(tmp, I2C_REG_CKH(alg_data)); iowrite32(tmp, I2C_REG_CKL(alg_data)); |