Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c3cef3f3c07bb98e023e4d5441e60538516a4741
Commit: c3cef3f3c07bb98e023e4d5441e60538516a4741
Parent: 72e3524c0b591c30c3a2e2058dd78327ec99efed
Author: Russell King <[EMAIL PROTECTED]>
AuthorDate: Mon Aug 20 10:19:10 2007 +0100
Committer: Russell King <[EMAIL PROTECTED]>
CommitDate: Fri Oct 12 21:14:58 2007 +0100
[ARM] pxa: update pxa i2c driver to use clk support
Signed-off-by: Russell King <[EMAIL PROTECTED]>
---
drivers/i2c/busses/i2c-pxa.c | 45 +++++++++++++++++++++++------------------
1 files changed, 25 insertions(+), 20 deletions(-)
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index bb5466b..00fad11 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -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);
-
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