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Message-ID: <20080420083100.GA335@doriath.ww600.siemens.net>
Date: Sun, 20 Apr 2008 12:31:00 +0400
From: Dmitry Baryshkov <dbaryshkov@...il.com>
To: linux-kernel@...r.kernel.org
Cc: akpm@...ux-foundation.org,
Haavard Skinnemoen <haavard.skinnemoen@...el.com>,
Russell King <rmk+lkml@....linux.org.uk>,
Paul Mundt <lethal@...ux-sh.org>,
pHilipp Zabel <philipp.zabel@...il.com>,
Pavel Machek <pavel@....cz>, tony@...mide.com, paul@...an.com,
David Brownell <david-b@...bell.net>
Subject: [PATCH 3/5] Clocklib: support sa1100 sub-arch.
Signed-off-by: Dmitry Baryshkov <dbaryshkov@...il.com>
---
arch/arm/Kconfig | 1 +
arch/arm/mach-sa1100/clock.c | 124 ++++++++----------------------------------
2 files changed, 24 insertions(+), 101 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index cb79d50..113ead3 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -416,6 +416,7 @@ config ARCH_RPC
select ISA_DMA_API
select NO_IOPORT
select HAVE_IDE
+ select HAVE_CLOCK_LIB
help
On the Acorn Risc-PC, Linux can support the internal IDE disk and
CD-ROM interface, serial and parallel port, and the floppy drive.
diff --git a/arch/arm/mach-sa1100/clock.c b/arch/arm/mach-sa1100/clock.c
index fc97fe5..715d91c 100644
--- a/arch/arm/mach-sa1100/clock.c
+++ b/arch/arm/mach-sa1100/clock.c
@@ -8,127 +8,49 @@
#include <linux/err.h>
#include <linux/string.h>
#include <linux/clk.h>
+#include <linux/clklib.h>
#include <linux/spinlock.h>
#include <linux/mutex.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_set_enable(struct clk *clk, bool enable)
{
/*
* First, set up the 3.6864MHz clock on GPIO 27 for the SA-1111:
* (SA-1110 Developer's Manual, section 9.1.2.1)
*/
- GAFR |= GPIO_32_768kHz;
- GPDR |= GPIO_32_768kHz;
- TUCR = TUCR_3_6864MHz;
+ if (enable) {
+ GAFR |= GPIO_32_768kHz;
+ GPDR |= GPIO_32_768kHz;
+ TUCR = TUCR_3_6864MHz;
+ } else {
+ TUCR = 0;
+ GPDR &= ~GPIO_32_768kHz;
+ GAFR &= ~GPIO_32_768kHz;
+ }
+
+ return 0;
}
-static void clk_gpio27_disable(void)
+static unsigned long clk_gpio27_get_rate(struct clk *clk)
{
- TUCR = 0;
- GPDR &= ~GPIO_32_768kHz;
- GAFR &= ~GPIO_32_768kHz;
+ return 3686400;
}
+static struct clk_ops clk_gpio27_ops = {
+ .get_rate = clk_gpio27_get_rate,
+ .set_mode = clk_gpio27_set_enable,
+};
+
static struct clk clk_gpio27 = {
.name = "GPIO27_CLK",
- .rate = 3686400,
- .enable = clk_gpio27_enable,
- .disable = clk_gpio27_disable,
+ .ops = &clk_gpio27_ops,
+ .owner = THIS_MODULE,
};
-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 int __init clk_init(void)
{
- clk_register(&clk_gpio27);
- return 0;
+ return clk_register(&clk_gpio27);
}
arch_initcall(clk_init);
--
1.5.4.4
--
With best wishes
Dmitry
--
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