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authorRabin Vincent <rabin.vincent@stericsson.com>2010-05-06 11:14:17 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-05-06 20:17:20 +0100
commitaf7dc2281fd3cedc04cb51bcc0887cdaf65c3fcc (patch)
tree5bd51ed12452e283806827e1793415ba6011b757
parentdc6048c7f97beaf8c5bb97ed772f43330d04727a (diff)
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>
-rw-r--r--arch/arm/mach-nomadik/clock.c10
-rw-r--r--arch/arm/mach-ux500/clock.c16
-rw-r--r--arch/arm/plat-nomadik/gpio.c20
3 files changed, 40 insertions, 6 deletions
diff --git a/arch/arm/mach-nomadik/clock.c b/arch/arm/mach-nomadik/clock.c
index 7af78501778..60f5bee09f2 100644
--- a/arch/arm/mach-nomadik/clock.c
+++ b/arch/arm/mach-nomadik/clock.c
@@ -37,6 +37,12 @@ static struct clk clk_48 = {
.rate = 48 * 1000 * 1000,
};
+/*
+ * Catch-all default clock to satisfy drivers using the clk API. We don't
+ * model the actual hardware clocks yet.
+ */
+static struct clk clk_default;
+
#define CLK(_clk, dev) \
{ \
.clk = _clk, \
@@ -46,6 +52,10 @@ static struct clk clk_48 = {
static struct clk_lookup lookups[] = {
CLK(&clk_48, "uart0"),
CLK(&clk_48, "uart1"),
+ CLK(&clk_default, "gpio.0"),
+ CLK(&clk_default, "gpio.1"),
+ CLK(&clk_default, "gpio.2"),
+ CLK(&clk_default, "gpio.3"),
};
static int __init clk_init(void)
diff --git a/arch/arm/mach-ux500/clock.c b/arch/arm/mach-ux500/clock.c
index c325dad1679..1b2c9890e8b 100644
--- a/arch/arm/mach-ux500/clock.c
+++ b/arch/arm/mach-ux500/clock.c
@@ -364,7 +364,8 @@ static DEFINE_PRCC_CLK(7, cfgreg_ed, 0, -1, NULL);
static struct clk_lookup u8500_common_clks[] = {
/* Peripheral Cluster #1 */
- CLK(gpio0, "gpioblock0", NULL),
+ CLK(gpio0, "gpio.0", NULL),
+ CLK(gpio0, "gpio.1", NULL),
CLK(slimbus0, "slimbus0", NULL),
CLK(i2c2, "nmk-i2c.2", NULL),
CLK(sdi0, "sdi0", NULL),
@@ -374,7 +375,10 @@ static struct clk_lookup u8500_common_clks[] = {
CLK(uart0, "uart0", NULL),
/* Peripheral Cluster #3 */
- CLK(gpio2, "gpioblock2", NULL),
+ CLK(gpio2, "gpio.2", NULL),
+ CLK(gpio2, "gpio.3", NULL),
+ CLK(gpio2, "gpio.4", NULL),
+ CLK(gpio2, "gpio.5", NULL),
CLK(sdi5, "sdi5", NULL),
CLK(uart2, "uart2", NULL),
CLK(ske, "ske", NULL),
@@ -383,7 +387,7 @@ static struct clk_lookup u8500_common_clks[] = {
CLK(fsmc, "fsmc", NULL),
/* Peripheral Cluster #5 */
- CLK(gpio3, "gpioblock3", NULL),
+ CLK(gpio3, "gpio.8", NULL),
/* Peripheral Cluster #6 */
CLK(hash1, "hash1", NULL),
@@ -418,7 +422,8 @@ static struct clk_lookup u8500_ed_clks[] = {
CLK(msp1_ed, "msp1", NULL),
/* Peripheral Cluster #2 */
- CLK(gpio1_ed, "gpioblock1", NULL),
+ CLK(gpio1_ed, "gpio.6", NULL),
+ CLK(gpio1_ed, "gpio.7", NULL),
CLK(ssitx_ed, "ssitx", NULL),
CLK(ssirx_ed, "ssirx", NULL),
CLK(spi0_ed, "spi0", NULL),
@@ -458,7 +463,8 @@ static struct clk_lookup u8500_v1_clks[] = {
CLK(msp1_v1, "msp1", NULL),
/* Peripheral Cluster #2 */
- CLK(gpio1_v1, "gpioblock1", NULL),
+ CLK(gpio1_v1, "gpio.6", NULL),
+ CLK(gpio1_v1, "gpio.7", NULL),
CLK(ssitx_v1, "ssitx", NULL),
CLK(ssirx_v1, "ssirx", NULL),
CLK(spi0_v1, "spi0", NULL),
diff --git a/arch/arm/plat-nomadik/gpio.c b/arch/arm/plat-nomadik/gpio.c
index eac9c9a7fbf..d28900cfa54 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 @@ static int __init nmk_gpio_probe(struct platform_device *dev)
struct nmk_gpio_chip *nmk_chip;
struct gpio_chip *chip;
struct resource *res;
+ struct clk *clk;
int irq;
int ret;
@@ -334,15 +338,24 @@ static int __init nmk_gpio_probe(struct platform_device *dev)
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 @@ static int __init nmk_gpio_probe(struct platform_device *dev)
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 @@ static int __exit nmk_gpio_remove(struct platform_device *dev)
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;