ARM: 6104/1: nomadik-gpio: use clk API
Add clocks with appropriate names in platforms that use it, and use the
clk API in nomadik-gpio.
Acked-by: Alessandro Rubini <rubini@unipv.it>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/plat-nomadik/gpio.c b/arch/arm/plat-nomadik/gpio.c
index eac9c9a..d28900c 100644
--- a/arch/arm/plat-nomadik/gpio.c
+++ b/arch/arm/plat-nomadik/gpio.c
@@ -15,6 +15,8 @@
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
@@ -35,6 +37,7 @@
struct nmk_gpio_chip {
struct gpio_chip chip;
void __iomem *addr;
+ struct clk *clk;
unsigned int parent_irq;
spinlock_t lock;
/* Keep track of configured edges */
@@ -310,6 +313,7 @@
struct nmk_gpio_chip *nmk_chip;
struct gpio_chip *chip;
struct resource *res;
+ struct clk *clk;
int irq;
int ret;
@@ -334,15 +338,24 @@
goto out;
}
+ clk = clk_get(&dev->dev, NULL);
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ goto out_release;
+ }
+
+ clk_enable(clk);
+
nmk_chip = kzalloc(sizeof(*nmk_chip), GFP_KERNEL);
if (!nmk_chip) {
ret = -ENOMEM;
- goto out_release;
+ goto out_clk;
}
/*
* The virt address in nmk_chip->addr is in the nomadik register space,
* so we can simply convert the resource address, without remapping
*/
+ nmk_chip->clk = clk;
nmk_chip->addr = io_p2v(res->start);
nmk_chip->chip = nmk_gpio_template;
nmk_chip->parent_irq = irq;
@@ -368,6 +381,9 @@
out_free:
kfree(nmk_chip);
+out_clk:
+ clk_disable(clk);
+ clk_put(clk);
out_release:
release_mem_region(res->start, resource_size(res));
out:
@@ -385,6 +401,8 @@
nmk_chip = platform_get_drvdata(dev);
gpiochip_remove(&nmk_chip->chip);
+ clk_disable(nmk_chip->clk);
+ clk_put(nmk_chip->clk);
kfree(nmk_chip);
release_mem_region(res->start, resource_size(res));
return 0;