evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

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

Browse source 
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
Show stats Download patch file Download diff file Expand all files Collapse all files

45
drivers/i2c/busses/i2c-pxa.c
View file

@ -31,6 +31,8 @@
#include <linux/interrupt.h> #include <linux/interrupt.h>
#include <linux/i2c-pxa.h> #include <linux/i2c-pxa.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <asm/hardware.h> #include <asm/hardware.h>
#include <asm/irq.h> #include <asm/irq.h>
@ -48,6 +50,7 @@ struct pxa_i2c {
unsigned int slave_addr; unsigned int slave_addr;
struct i2c_adapter adap; struct i2c_adapter adap;
struct clk *clk;
#ifdef CONFIG_I2C_PXA_SLAVE #ifdef CONFIG_I2C_PXA_SLAVE
struct i2c_slave_client *slave; struct i2c_slave_client *slave;
#endif #endif
@ -869,6 +872,12 @@ static int i2c_pxa_probe(struct platform_device *dev)
sprintf(i2c->adap.name, "pxa_i2c-i2c.%u", dev->id); 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)); i2c->reg_base = ioremap(res->start, res_len(res));
if (!i2c->reg_base) { if (!i2c->reg_base) {
ret = -EIO; ret = -EIO;
@ -889,22 +898,19 @@ static int i2c_pxa_probe(struct platform_device *dev)
} }
#endif #endif
clk_enable(i2c->clk);
#ifdef CONFIG_PXA27x
switch (dev->id) { switch (dev->id) {
case 0: case 0:
#ifdef CONFIG_PXA27x
pxa_gpio_mode(GPIO117_I2CSCL_MD); pxa_gpio_mode(GPIO117_I2CSCL_MD);
pxa_gpio_mode(GPIO118_I2CSDA_MD); pxa_gpio_mode(GPIO118_I2CSDA_MD);
#endif
pxa_set_cken(CKEN_I2C, 1);
break; break;
#ifdef CONFIG_PXA27x
case 1: case 1:
local_irq_disable(); local_irq_disable();
PCFR |= PCFR_PI2CEN; PCFR |= PCFR_PI2CEN;
local_irq_enable(); local_irq_enable();
pxa_set_cken(CKEN_PWRI2C, 1);
#endif
} }
#endif
ret = request_irq(irq, i2c_pxa_handler, IRQF_DISABLED, ret = request_irq(irq, i2c_pxa_handler, IRQF_DISABLED,
i2c->adap.name, i2c); i2c->adap.name, i2c);
@ -948,19 +954,18 @@ static int i2c_pxa_probe(struct platform_device *dev)
eadapt: eadapt:
free_irq(irq, i2c); free_irq(irq, i2c);
ereqirq: ereqirq:
switch (dev->id) { clk_disable(i2c->clk);
case 0:
pxa_set_cken(CKEN_I2C, 0);
break;
#ifdef CONFIG_PXA27x #ifdef CONFIG_PXA27x
case 1: if (dev->id == 1) {
pxa_set_cken(CKEN_PWRI2C, 0);
local_irq_disable(); local_irq_disable();
PCFR &= ~PCFR_PI2CEN; PCFR &= ~PCFR_PI2CEN;
local_irq_enable(); local_irq_enable();
#endif
} }
#endif
eremap: eremap:
clk_put(i2c->clk);
eclk:
kfree(i2c); kfree(i2c);
emalloc: emalloc:
release_mem_region(res->start, res_len(res)); 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); i2c_del_adapter(&i2c->adap);
free_irq(i2c->irq, i2c); free_irq(i2c->irq, i2c);
switch (dev->id) {
case 0: clk_disable(i2c->clk);
pxa_set_cken(CKEN_I2C, 0); clk_put(i2c->clk);
break;
#ifdef CONFIG_PXA27x #ifdef CONFIG_PXA27x
case 1: if (dev->id == 1) {
pxa_set_cken(CKEN_PWRI2C, 0);
local_irq_disable(); local_irq_disable();
PCFR &= ~PCFR_PI2CEN; PCFR &= ~PCFR_PI2CEN;
local_irq_enable(); local_irq_enable();
#endif
} }
#endif
release_mem_region(i2c->iobase, i2c->iosize); release_mem_region(i2c->iobase, i2c->iosize);
kfree(i2c); kfree(i2c);