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Subject[PATCH 3/3] Clocklib: refactor SA-1100 to use clocklib
Make SA-1100 use clocklib for clocks support.

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
---
arch/arm/Kconfig | 1 +
arch/arm/mach-sa1100/clock.c | 114 ++++++------------------------------------
2 files changed, 17 insertions(+), 98 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index bf0dd41..d86ad6a 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -460,6 +460,7 @@ config ARCH_SA1100
select GENERIC_CLOCKEVENTS
select TICK_ONESHOT
select HAVE_GPIO_LIB
+ select HAVE_GENERIC_CLOCKS
help
Support for StrongARM 11x0 based boards.

diff --git a/arch/arm/mach-sa1100/clock.c b/arch/arm/mach-sa1100/clock.c
index fc97fe5..472eec1 100644
--- a/arch/arm/mach-sa1100/clock.c
+++ b/arch/arm/mach-sa1100/clock.c
@@ -3,88 +3,12 @@
*/
#include <linux/module.h>
#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/errno.h>
-#include <linux/err.h>
-#include <linux/string.h>
#include <linux/clk.h>
-#include <linux/spinlock.h>
-#include <linux/mutex.h>
+#include <linux/generic_clk.h>

#include <asm/hardware.h>

-/*
- * Very simple clock implementation - we only have one clock to
- * deal with at the moment, so we only match using the "name".
- */
-struct clk {
- struct list_head node;
- unsigned long rate;
- const char *name;
- unsigned int enabled;
- void (*enable)(void);
- void (*disable)(void);
-};
-
-static LIST_HEAD(clocks);
-static DEFINE_MUTEX(clocks_mutex);
-static DEFINE_SPINLOCK(clocks_lock);
-
-struct clk *clk_get(struct device *dev, const char *id)
-{
- struct clk *p, *clk = ERR_PTR(-ENOENT);
-
- mutex_lock(&clocks_mutex);
- list_for_each_entry(p, &clocks, node) {
- if (strcmp(id, p->name) == 0) {
- clk = p;
- break;
- }
- }
- mutex_unlock(&clocks_mutex);
-
- return clk;
-}
-EXPORT_SYMBOL(clk_get);
-
-void clk_put(struct clk *clk)
-{
-}
-EXPORT_SYMBOL(clk_put);
-
-int clk_enable(struct clk *clk)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&clocks_lock, flags);
- if (clk->enabled++ == 0)
- clk->enable();
- spin_unlock_irqrestore(&clocks_lock, flags);
- return 0;
-}
-EXPORT_SYMBOL(clk_enable);
-
-void clk_disable(struct clk *clk)
-{
- unsigned long flags;
-
- WARN_ON(clk->enabled == 0);
-
- spin_lock_irqsave(&clocks_lock, flags);
- if (--clk->enabled == 0)
- clk->disable();
- spin_unlock_irqrestore(&clocks_lock, flags);
-}
-EXPORT_SYMBOL(clk_disable);
-
-unsigned long clk_get_rate(struct clk *clk)
-{
- return clk->rate;
-}
-EXPORT_SYMBOL(clk_get_rate);
-
-
-static void clk_gpio27_enable(void)
+static int clk_gpio27_enable(struct clk *clk)
{
/*
* First, set up the 3.6864MHz clock on GPIO 27 for the SA-1111:
@@ -93,38 +17,32 @@ static void clk_gpio27_enable(void)
GAFR |= GPIO_32_768kHz;
GPDR |= GPIO_32_768kHz;
TUCR = TUCR_3_6864MHz;
+
+ return 0;
}

-static void clk_gpio27_disable(void)
+static void clk_gpio27_disable(struct clk *clk)
{
TUCR = 0;
GPDR &= ~GPIO_32_768kHz;
GAFR &= ~GPIO_32_768kHz;
}

-static struct clk clk_gpio27 = {
- .name = "GPIO27_CLK",
- .rate = 3686400,
+static unsigned long clk_gpio27_get_rate(struct clk *clk)
+{
+ return 3686400;
+}
+
+static struct clk_ops clk_gpio27_ops = {
.enable = clk_gpio27_enable,
.disable = clk_gpio27_disable,
+ .get_rate = clk_gpio27_get_rate,
};

-int clk_register(struct clk *clk)
-{
- mutex_lock(&clocks_mutex);
- list_add(&clk->node, &clocks);
- mutex_unlock(&clocks_mutex);
- return 0;
-}
-EXPORT_SYMBOL(clk_register);
-
-void clk_unregister(struct clk *clk)
-{
- mutex_lock(&clocks_mutex);
- list_del(&clk->node);
- mutex_unlock(&clocks_mutex);
-}
-EXPORT_SYMBOL(clk_unregister);
+static struct clk clk_gpio27 = {
+ .name = "GPIO27_CLK",
+ .ops = &clk_gpio27_ops,
+};

static int __init clk_init(void)
{
--
1.5.6

--
With best wishes
Dmitry



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