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OpenCloudOS-Kernel
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[ARM] pxa: update pxa i2c driver to use clk support 

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2007-08-20 10:19:10 +01:00 committed by Russell King
parent 72e3524c0b
commit c3cef3f3c0
1 changed files with 25 additions and 20 deletions
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45
drivers/i2c/busses/i2c-pxa.c
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@ -31,6 +31,8 @@
#include <linux/interrupt.h>
#include <linux/i2c-pxa.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <asm/hardware.h>
#include <asm/irq.h>
@ -48,6 +50,7 @@ struct pxa_i2c {
unsigned int slave_addr;
struct i2c_adapter adap;
struct clk *clk;
#ifdef CONFIG_I2C_PXA_SLAVE
struct i2c_slave_client *slave;
#endif
@ -869,6 +872,12 @@ static int i2c_pxa_probe(struct platform_device *dev)
sprintf(i2c->adap.name, "pxa_i2c-i2c.%u", dev->id);
i2c->clk = clk_get(&dev->dev, "I2CCLK");
if (IS_ERR(i2c->clk)) {
ret = PTR_ERR(i2c->clk);
goto eclk;
}
i2c->reg_base = ioremap(res->start, res_len(res));
if (!i2c->reg_base) {
ret = -EIO;
@ -889,22 +898,19 @@ static int i2c_pxa_probe(struct platform_device *dev)
}
#endif
clk_enable(i2c->clk);
#ifdef CONFIG_PXA27x
switch (dev->id) {
case 0:
#ifdef CONFIG_PXA27x
pxa_gpio_mode(GPIO117_I2CSCL_MD);
pxa_gpio_mode(GPIO118_I2CSDA_MD);
#endif
pxa_set_cken(CKEN_I2C, 1);
break;
#ifdef CONFIG_PXA27x
case 1:
local_irq_disable();
PCFR |= PCFR_PI2CEN;
local_irq_enable();
pxa_set_cken(CKEN_PWRI2C, 1);
#endif
}
#endif
ret = request_irq(irq, i2c_pxa_handler, IRQF_DISABLED,
i2c->adap.name, i2c);
@ -948,19 +954,18 @@ static int i2c_pxa_probe(struct platform_device *dev)
eadapt:
free_irq(irq, i2c);
ereqirq:
switch (dev->id) {
case 0:
pxa_set_cken(CKEN_I2C, 0);
break;
clk_disable(i2c->clk);
#ifdef CONFIG_PXA27x
case 1:
pxa_set_cken(CKEN_PWRI2C, 0);
if (dev->id == 1) {
local_irq_disable();
PCFR &= ~PCFR_PI2CEN;
local_irq_enable();
#endif
}
#endif
eremap:
clk_put(i2c->clk);
eclk:
kfree(i2c);
emalloc:
release_mem_region(res->start, res_len(res));
@ -975,18 +980,18 @@ static int i2c_pxa_remove(struct platform_device *dev)
i2c_del_adapter(&i2c->adap);
free_irq(i2c->irq, i2c);
switch (dev->id) {
case 0:
pxa_set_cken(CKEN_I2C, 0);
break;
clk_disable(i2c->clk);
clk_put(i2c->clk);
#ifdef CONFIG_PXA27x
case 1:
pxa_set_cken(CKEN_PWRI2C, 0);
if (dev->id == 1) {
local_irq_disable();
PCFR &= ~PCFR_PI2CEN;
local_irq_enable();
#endif
}
#endif
release_mem_region(i2c->iobase, i2c->iosize);
kfree(i2c);