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ARM: PNX4008: move i2c clock start/stop into driver

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Acked-by: Vitaly Wool <[email protected]>
Signed-off-by: Russell King <[email protected]>
This commit is contained in:
Russell King 2009-11-20 11:12:26 +00:00
commit 0321cb83e1
3 changed files with 32 additions and 47 deletions
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39
drivers/i2c/busses/i2c-pnx.c
View file

@ -20,6 +20,9 @@
#include <linux/platform_device.h>
#include <linux/i2c-pnx.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <mach/hardware.h>
#include <mach/i2c.h>
#include <asm/irq.h>
@ -550,13 +553,22 @@ static int i2c_pnx_controller_suspend(struct platform_device *pdev,
pm_message_t state)
{
struct i2c_pnx_data *i2c_pnx = platform_get_drvdata(pdev);
return i2c_pnx->set_clock_run(pdev);
struct i2c_pnx_algo_data *alg_data = i2c_pnx->adapter->algo_data;
/* FIXME: disable clock? */
clk_set_rate(alg_data->clk, 1);
return 0;
}
static int i2c_pnx_controller_resume(struct platform_device *pdev)
{
struct i2c_pnx_data *i2c_pnx = platform_get_drvdata(pdev);
return i2c_pnx->set_clock_run(pdev);
struct i2c_pnx_algo_data *alg_data = i2c_pnx->adapter->algo_data;
clk_set_rate(alg_data->clk, 1);
return 0;
}
#else
#define i2c_pnx_controller_suspend NULL
@ -580,6 +592,15 @@ static int __devinit i2c_pnx_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, i2c_pnx);
i2c_pnx->adapter->algo = &pnx_algorithm;
alg_data = i2c_pnx->adapter->algo_data;
alg_data->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(alg_data->clk)) {
ret = PTR_ERR(alg_data->clk);
goto out_drvdata;
}
if (i2c_pnx->calculate_input_freq)
freq_mhz = i2c_pnx->calculate_input_freq(pdev);
else {
@ -588,9 +609,6 @@ static int __devinit i2c_pnx_probe(struct platform_device *pdev)
"%d MHz\n", freq_mhz);
}
i2c_pnx->adapter->algo = &pnx_algorithm;
alg_data = i2c_pnx->adapter->algo_data;
init_timer(&alg_data->mif.timer);
alg_data->mif.timer.function = i2c_pnx_timeout;
alg_data->mif.timer.data = (unsigned long)i2c_pnx->adapter;
@ -602,7 +620,7 @@ static int __devinit i2c_pnx_probe(struct platform_device *pdev)
"I/O region 0x%08x for I2C already in use.\n",
alg_data->base);
ret = -ENODEV;
goto out_drvdata;
goto out_clkget;
}
if (!(alg_data->ioaddr =
@ -612,7 +630,7 @@ static int __devinit i2c_pnx_probe(struct platform_device *pdev)
goto out_release;
}
i2c_pnx->set_clock_run(pdev);
clk_set_rate(alg_data->clk, 1);
/*
* Clock Divisor High This value is the number of system clocks
@ -658,11 +676,13 @@ static int __devinit i2c_pnx_probe(struct platform_device *pdev)
out_irq:
free_irq(alg_data->irq, i2c_pnx->adapter);
out_clock:
i2c_pnx->set_clock_stop(pdev);
clk_set_rate(alg_data->clk, 0);
out_unmap:
iounmap((void *)alg_data->ioaddr);
out_release:
release_mem_region(alg_data->base, I2C_PNX_REGION_SIZE);
out_clkget:
clk_put(alg_data->clk);
out_drvdata:
platform_set_drvdata(pdev, NULL);
out:
@ -677,9 +697,10 @@ static int __devexit i2c_pnx_remove(struct platform_device *pdev)
free_irq(alg_data->irq, i2c_pnx->adapter);
i2c_del_adapter(adap);
i2c_pnx->set_clock_stop(pdev);
clk_set_rate(alg_data->clk, 0);
iounmap((void *)alg_data->ioaddr);
release_mem_region(alg_data->base, I2C_PNX_REGION_SIZE);
clk_put(alg_data->clk);
platform_set_drvdata(pdev, NULL);
return 0;