Merge branch 'clks' into devel

13 files changed, 65 insertions, 271 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 29759cd..131b712 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -271,6 +271,7 @@ config ARCH_EP93XX
 	select ARM_VIC
 	select GENERIC_GPIO
 	select HAVE_CLK
+	select COMMON_CLKDEV
 	select ARCH_REQUIRE_GPIOLIB
 	help
 	  This enables support for the Cirrus EP93xx series of CPUs.
diff --git a/arch/arm/mach-aaec2000/Makefile b/arch/arm/mach-aaec2000/Makefile
index a8e462f..20ec838 100644
--- a/arch/arm/mach-aaec2000/Makefile
+++ b/arch/arm/mach-aaec2000/Makefile
@@ -3,7 +3,7 @@
 #
 
 # Common support (must be linked before board specific support)
-obj-y += core.o clock.o
+obj-y += core.o
 
 # Specific board support
 obj-$(CONFIG_MACH_AAED2000) += aaed2000.o
diff --git a/arch/arm/mach-aaec2000/clock.c b/arch/arm/mach-aaec2000/clock.c
deleted file mode 100644
index e10ee15..0000000
--- a/arch/arm/mach-aaec2000/clock.c
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- *  linux/arch/arm/mach-aaec2000/clock.c
- *
- *  Copyright (C) 2005 Nicolas Bellido Y Ortega
- *
- *  Based on linux/arch/arm/mach-integrator/clock.c
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#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/mutex.h>
-
-#include "clock.h"
-
-static LIST_HEAD(clocks);
-static DEFINE_MUTEX(clocks_mutex);
-
-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 && try_module_get(p->owner)) {
-			clk = p;
-			break;
-		}
-	}
-	mutex_unlock(&clocks_mutex);
-
-	return clk;
-}
-EXPORT_SYMBOL(clk_get);
-
-void clk_put(struct clk *clk)
-{
-	module_put(clk->owner);
-}
-EXPORT_SYMBOL(clk_put);
-
-int clk_enable(struct clk *clk)
-{
-	return 0;
-}
-EXPORT_SYMBOL(clk_enable);
-
-void clk_disable(struct clk *clk)
-{
-}
-EXPORT_SYMBOL(clk_disable);
-
-unsigned long clk_get_rate(struct clk *clk)
-{
-	return clk->rate;
-}
-EXPORT_SYMBOL(clk_get_rate);
-
-long clk_round_rate(struct clk *clk, unsigned long rate)
-{
-	return rate;
-}
-EXPORT_SYMBOL(clk_round_rate);
-
-int clk_set_rate(struct clk *clk, unsigned long rate)
-{
-	return 0;
-}
-EXPORT_SYMBOL(clk_set_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 int __init clk_init(void)
-{
-	return 0;
-}
-arch_initcall(clk_init);
diff --git a/arch/arm/mach-aaec2000/clock.h b/arch/arm/mach-aaec2000/clock.h
deleted file mode 100644
index d4bb74f..0000000
--- a/arch/arm/mach-aaec2000/clock.h
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- *  linux/arch/arm/mach-aaec2000/clock.h
- *
- *  Copyright (C) 2005 Nicolas Bellido Y Ortega
- *
- *  Based on linux/arch/arm/mach-integrator/clock.h
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-struct module;
-
-struct clk {
-	struct list_head	node;
-	unsigned long		rate;
-	struct module		*owner;
-	const char		*name;
-	void			*data;
-};
-
-int clk_register(struct clk *clk);
-void clk_unregister(struct clk *clk);
diff --git a/arch/arm/mach-aaec2000/core.c b/arch/arm/mach-aaec2000/core.c
index dfb26bc..50e1396 100644
--- a/arch/arm/mach-aaec2000/core.c
+++ b/arch/arm/mach-aaec2000/core.c
@@ -19,6 +19,7 @@
 #include <linux/interrupt.h>
 #include <linux/timex.h>
 #include <linux/signal.h>
+#include <linux/clk.h>
 
 #include <mach/hardware.h>
 #include <asm/irq.h>
@@ -30,7 +31,6 @@
 #include <asm/mach/map.h>
 
 #include "core.h"
-#include "clock.h"
 
 /*
  * Common I/O mapping:
@@ -229,9 +229,28 @@ static struct amba_device *amba_devs[] __initdata = {
 	&clcd_device,
 };
 
-static struct clk aaec2000_clcd_clk = {
-	.name = "CLCDCLK",
-};
+void clk_disable(struct clk *clk)
+{
+}
+
+int clk_set_rate(struct clk *clk, unsigned long rate)
+{
+	return 0;
+}
+
+int clk_enable(struct clk *clk)
+{
+	return 0;
+}
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+	return dev && strcmp(dev_name(dev), "mb:16") == 0 ? NULL : ERR_PTR(-ENOENT);
+}
+
+void clk_put(struct clk *clk)
+{
+}
 
 void __init aaec2000_set_clcd_plat_data(struct aaec2000_clcd_info *clcd)
 {
@@ -265,8 +284,6 @@ static int __init aaec2000_init(void)
 {
 	int i;
 
-	clk_register(&aaec2000_clcd_clk);
-
 	for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
 		struct amba_device *d = amba_devs[i];
 		amba_device_register(d, &iomem_resource);
diff --git a/arch/arm/mach-ep93xx/clock.c b/arch/arm/mach-ep93xx/clock.c
index 8c9f249..9604928 100644
--- a/arch/arm/mach-ep93xx/clock.c
+++ b/arch/arm/mach-ep93xx/clock.c
@@ -16,11 +16,12 @@
 #include <linux/module.h>
 #include <linux/string.h>
 #include <linux/io.h>
+
+#include <asm/clkdev.h>
 #include <asm/div64.h>
 #include <mach/hardware.h>
 
 struct clk {
-	char		*name;
 	unsigned long	rate;
 	int		users;
 	u32		enable_reg;
@@ -28,53 +29,33 @@ struct clk {
 };
 
 static struct clk clk_uart = {
-	.name		= "UARTCLK",
 	.rate		= 14745600,
 };
-static struct clk clk_pll1 = {
-	.name		= "pll1",
-};
-static struct clk clk_f = {
-	.name		= "fclk",
-};
-static struct clk clk_h = {
-	.name		= "hclk",
-};
-static struct clk clk_p = {
-	.name		= "pclk",
-};
-static struct clk clk_pll2 = {
-	.name		= "pll2",
-};
+static struct clk clk_pll1;
+static struct clk clk_f;
+static struct clk clk_h;
+static struct clk clk_p;
+static struct clk clk_pll2;
 static struct clk clk_usb_host = {
-	.name		= "usb_host",
 	.enable_reg	= EP93XX_SYSCON_CLOCK_CONTROL,
 	.enable_mask	= EP93XX_SYSCON_CLOCK_USH_EN,
 };
 
-
-static struct clk *clocks[] = {
-	&clk_uart,
-	&clk_pll1,
-	&clk_f,
-	&clk_h,
-	&clk_p,
-	&clk_pll2,
-	&clk_usb_host,
+#define INIT_CK(dev,con,ck)					\
+	{ .dev_id = dev, .con_id = con, .clk = ck }
+
+static struct clk_lookup clocks[] = {
+	INIT_CK("apb:uart1", NULL, &clk_uart),
+	INIT_CK("apb:uart2", NULL, &clk_uart),
+	INIT_CK("apb:uart3", NULL, &clk_uart),
+	INIT_CK(NULL, "pll1", &clk_pll1),
+	INIT_CK(NULL, "fclk", &clk_f),
+	INIT_CK(NULL, "hclk", &clk_h),
+	INIT_CK(NULL, "pclk", &clk_p),
+	INIT_CK(NULL, "pll2", &clk_pll2),
+	INIT_CK(NULL, "usb_host", &clk_usb_host),
 };
 
-struct clk *clk_get(struct device *dev, const char *id)
-{
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(clocks); i++) {
-		if (!strcmp(clocks[i]->name, id))
-			return clocks[i];
-	}
-
-	return ERR_PTR(-ENOENT);
-}
-EXPORT_SYMBOL(clk_get);
 
 int clk_enable(struct clk *clk)
 {
@@ -106,12 +87,6 @@ unsigned long clk_get_rate(struct clk *clk)
 }
 EXPORT_SYMBOL(clk_get_rate);
 
-void clk_put(struct clk *clk)
-{
-}
-EXPORT_SYMBOL(clk_put);
-
-
 
 static char fclk_divisors[] = { 1, 2, 4, 8, 16, 1, 1, 1 };
 static char hclk_divisors[] = { 1, 2, 4, 5, 6, 8, 16, 32 };
@@ -138,6 +113,7 @@ static unsigned long calc_pll_rate(u32 config_word)
 static int __init ep93xx_clock_init(void)
 {
 	u32 value;
+	int i;
 
 	value = __raw_readl(EP93XX_SYSCON_CLOCK_SET1);
 	if (!(value & 0x00800000)) {			/* PLL1 bypassed?  */
@@ -165,6 +141,8 @@ static int __init ep93xx_clock_init(void)
 		clk_f.rate / 1000000, clk_h.rate / 1000000,
 		clk_p.rate / 1000000);
 
+	for (i = 0; i < ARRAY_SIZE(clocks); i++)
+		clkdev_add(&clocks[i]);
 	return 0;
 }
 arch_initcall(ep93xx_clock_init);
diff --git a/arch/arm/mach-ep93xx/include/mach/clkdev.h b/arch/arm/mach-ep93xx/include/mach/clkdev.h
new file mode 100644
index 0000000..04b37a8
--- /dev/null
+++ b/arch/arm/mach-ep93xx/include/mach/clkdev.h
@@ -0,0 +1,7 @@
+#ifndef __ASM_MACH_CLKDEV_H
+#define __ASM_MACH_CLKDEV_H
+
+#define __clk_get(clk) ({ 1; })
+#define __clk_put(clk) do { } while (0)
+
+#endif
diff --git a/arch/arm/mach-lh7a40x/clocks.c b/arch/arm/mach-lh7a40x/clocks.c
index 4fb23ac..6182f54 100644
--- a/arch/arm/mach-lh7a40x/clocks.c
+++ b/arch/arm/mach-lh7a40x/clocks.c
@@ -14,21 +14,14 @@
 #include <linux/err.h>
 
 struct module;
-struct icst525_params;
 
 struct clk {
 	struct list_head node;
 	unsigned long rate;
 	struct module *owner;
 	const char *name;
-//	void *data;
-//	const struct icst525_params *params;
-//	void (*setvco)(struct clk *, struct icst525_vco vco);
 };
 
-int clk_register(struct clk *clk);
-void clk_unregister(struct clk *clk);
-
 /* ----- */
 
 #define MAINDIV1(c)	(((c) >>  7) & 0x0f)
@@ -79,31 +72,15 @@ unsigned int pclkfreq_get (void)
 
 /* ----- */
 
-static LIST_HEAD(clocks);
-static DECLARE_MUTEX(clocks_sem);
-
 struct clk *clk_get (struct device *dev, const char *id)
 {
-	struct clk *p;
-	struct clk *clk = ERR_PTR(-ENOENT);
-
-	down (&clocks_sem);
-	list_for_each_entry (p, &clocks, node) {
-		if (strcmp (id, p->name) == 0
-		    && try_module_get(p->owner)) {
-			clk = p;
-			break;
-		}
-	}
-	up (&clocks_sem);
-
-	return clk;
+	return dev && strcmp(dev_name(dev), "cldc-lh7a40x") == 0
+		 ? NULL : ERR_PTR(-ENOENT);
 }
 EXPORT_SYMBOL(clk_get);
 
 void clk_put (struct clk *clk)
 {
-	module_put(clk->owner);
 }
 EXPORT_SYMBOL(clk_put);
 
@@ -118,20 +95,9 @@ void clk_disable (struct clk *clk)
 }
 EXPORT_SYMBOL(clk_disable);
 
-int clk_use (struct clk *clk)
-{
-	return 0;
-}
-EXPORT_SYMBOL(clk_use);
-
-void clk_unuse (struct clk *clk)
-{
-}
-EXPORT_SYMBOL(clk_unuse);
-
 unsigned long clk_get_rate (struct clk *clk)
 {
-	return clk->rate;
+	return 0;
 }
 EXPORT_SYMBOL(clk_get_rate);
 
@@ -143,56 +109,6 @@ EXPORT_SYMBOL(clk_round_rate);
 
 int clk_set_rate (struct clk *clk, unsigned long rate)
 {
-	int ret = -EIO;
-	return ret;
+	return -EIO;
 }
 EXPORT_SYMBOL(clk_set_rate);
-
-#if 0
-/*
- * These are fixed clocks.
- */
-static struct clk kmi_clk = {
-	.name	= "KMIREFCLK",
-	.rate	= 24000000,
-};
-
-static struct clk uart_clk = {
-	.name	= "UARTCLK",
-	.rate	= 24000000,
-};
-
-static struct clk mmci_clk = {
-	.name	= "MCLK",
-	.rate	= 33000000,
-};
-#endif
-
-static struct clk clcd_clk = {
-	.name	= "CLCDCLK",
-	.rate	= 0,
-};
-
-int clk_register (struct clk *clk)
-{
-	down (&clocks_sem);
-	list_add (&clk->node, &clocks);
-	up (&clocks_sem);
-	return 0;
-}
-EXPORT_SYMBOL(clk_register);
-
-void clk_unregister (struct clk *clk)
-{
-	down (&clocks_sem);
-	list_del (&clk->node);
-	up (&clocks_sem);
-}
-EXPORT_SYMBOL(clk_unregister);
-
-static int __init clk_init (void)
-{
-	clk_register(&clcd_clk);
-	return 0;
-}
-arch_initcall(clk_init);
diff --git a/arch/arm/mach-netx/fb.c b/arch/arm/mach-netx/fb.c
index 24c7965..8f1f992 100644
--- a/arch/arm/mach-netx/fb.c
+++ b/arch/arm/mach-netx/fb.c
@@ -22,14 +22,11 @@
 #include <linux/dma-mapping.h>
 #include <linux/amba/bus.h>
 #include <linux/amba/clcd.h>
+#include <linux/err.h>
 
 #include <mach/netx-regs.h>
 #include <mach/hardware.h>
 
-struct clk {};
-
-static struct clk fb_clk;
-
 static struct clcd_panel *netx_panel;
 
 void netx_clcd_enable(struct clcd_fb *fb)
@@ -85,7 +82,7 @@ int clk_enable(struct clk *clk)
 
 struct clk *clk_get(struct device *dev, const char *id)
 {
-	return &fb_clk;
+	return dev && strcmp(dev_name(dev), "fb") == 0 ? NULL : ERR_PTR(-ENOENT);
 }
 
 void clk_put(struct clk *clk)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 2fadf32..1bcbdd6 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -500,7 +500,7 @@ static int mmci_probe(struct amba_device *dev, void *id)
 	}
 
 	host = mmc_priv(mmc);
-	host->clk = clk_get(&dev->dev, "MCLK");
+	host->clk = clk_get(&dev->dev, NULL);
 	if (IS_ERR(host->clk)) {
 		ret = PTR_ERR(host->clk);
 		host->clk = NULL;
diff --git a/drivers/serial/amba-pl010.c b/drivers/serial/amba-pl010.c
index 7156268..e3a5ad5 100644
--- a/drivers/serial/amba-pl010.c
+++ b/drivers/serial/amba-pl010.c
@@ -692,7 +692,7 @@ static int pl010_probe(struct amba_device *dev, void *id)
 		goto free;
 	}
 
-	uap->clk = clk_get(&dev->dev, "UARTCLK");
+	uap->clk = clk_get(&dev->dev, NULL);
 	if (IS_ERR(uap->clk)) {
 		ret = PTR_ERR(uap->clk);
 		goto unmap;
diff --git a/drivers/serial/amba-pl011.c b/drivers/serial/amba-pl011.c
index b718004..8b2b970 100644
--- a/drivers/serial/amba-pl011.c
+++ b/drivers/serial/amba-pl011.c
@@ -756,7 +756,7 @@ static int pl011_probe(struct amba_device *dev, void *id)
 		goto free;
 	}
 
-	uap->clk = clk_get(&dev->dev, "UARTCLK");
+	uap->clk = clk_get(&dev->dev, NULL);
 	if (IS_ERR(uap->clk)) {
 		ret = PTR_ERR(uap->clk);
 		goto unmap;
diff --git a/drivers/video/amba-clcd.c b/drivers/video/amba-clcd.c
index 70ba1bd..2ac52fd 100644
--- a/drivers/video/amba-clcd.c
+++ b/drivers/video/amba-clcd.c
@@ -343,7 +343,7 @@ static int clcdfb_register(struct clcd_fb *fb)
 {
 	int ret;
 
-	fb->clk = clk_get(&fb->dev->dev, "CLCDCLK");
+	fb->clk = clk_get(&fb->dev->dev, NULL);
 	if (IS_ERR(fb->clk)) {
 		ret = PTR_ERR(fb->clk);
 		goto out;