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Message-ID: <20080608092214.GA11500@doriath.ww600.siemens.net>
Date: Sun, 8 Jun 2008 13:22:14 +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>,
Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [RFC][PATCH 3/3] Clocklib: Refactor PXA arm arch to use clocklib.
Make PXA use clocklib for clocks support.
Signed-off-by: Dmitry Baryshkov <dbaryshkov@...il.com>
---
arch/arm/Kconfig | 1 +
arch/arm/mach-pxa/clock.c | 135 +++++++++++------------------------------
arch/arm/mach-pxa/clock.h | 92 +++++++++++++++++++----------
arch/arm/mach-pxa/pxa25x.c | 68 +++++++++++++--------
arch/arm/mach-pxa/pxa27x.c | 75 ++++++++++++++---------
arch/arm/mach-pxa/pxa3xx.c | 144 ++++++++++++++++++++++++++++----------------
6 files changed, 275 insertions(+), 240 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 9d93017..8f02e29 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -397,6 +397,7 @@ config ARCH_PXA
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
select TICK_ONESHOT
+ select CLOCKLIB
help
Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
diff --git a/arch/arm/mach-pxa/clock.c b/arch/arm/mach-pxa/clock.c
index e97dc59..d9e7eba 100644
--- a/arch/arm/mach-pxa/clock.c
+++ b/arch/arm/mach-pxa/clock.c
@@ -8,6 +8,7 @@
#include <linux/err.h>
#include <linux/string.h>
#include <linux/clk.h>
+#include <linux/clocklib.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
@@ -20,135 +21,71 @@
#include "generic.h"
#include "clock.h"
-static LIST_HEAD(clocks);
-static DEFINE_MUTEX(clocks_mutex);
-static DEFINE_SPINLOCK(clocks_lock);
-
-static struct clk *clk_lookup(struct device *dev, const char *id)
+static int clk_gpio11_enable(struct clk *clk)
{
- struct clk *p;
-
- list_for_each_entry(p, &clocks, node)
- if (strcmp(id, p->name) == 0 && p->dev == dev)
- return p;
-
- return NULL;
+ pxa_gpio_mode(GPIO11_3_6MHz_MD);
+ return 0;
}
-struct clk *clk_get(struct device *dev, const char *id)
+static void clk_gpio11_disable(struct clk *clk)
{
- struct clk *p, *clk = ERR_PTR(-ENOENT);
-
- mutex_lock(&clocks_mutex);
- p = clk_lookup(dev, id);
- if (!p)
- p = clk_lookup(NULL, id);
- if (p)
- clk = p;
- mutex_unlock(&clocks_mutex);
-
- return clk;
+ /* do nothing */
}
-EXPORT_SYMBOL(clk_get);
-void clk_put(struct clk *clk)
+static unsigned long clk_gpio11_get_rate(struct clk *clk)
{
+ return 3686400;
}
-EXPORT_SYMBOL(clk_put);
-
-int clk_enable(struct clk *clk)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&clocks_lock, flags);
- if (clk->enabled++ == 0)
- clk->ops->enable(clk);
- spin_unlock_irqrestore(&clocks_lock, flags);
- if (clk->delay)
- udelay(clk->delay);
+static const struct clk_ops clk_gpio11_ops = {
+ .enable = clk_gpio11_enable,
+ .disable = clk_gpio11_disable,
+ .get_rate = clk_gpio11_get_rate,
+ .round_rate = clk_no_round_rate,
+};
- return 0;
-}
-EXPORT_SYMBOL(clk_enable);
+static struct clk clk_gpio11 = {
+ .name = "GPIO27_CLK",
+ .ops = &clk_gpio11_ops,
+ .release = clk_static_release,
+};
-void clk_disable(struct clk *clk)
+int clk_cken_enable(struct clk *clk)
{
- unsigned long flags;
+ struct clk_cken *priv = container_of(clk, struct clk_cken, clk);
- WARN_ON(clk->enabled == 0);
+ CKEN |= 1 << priv->cken;
- spin_lock_irqsave(&clocks_lock, flags);
- if (--clk->enabled == 0)
- clk->ops->disable(clk);
- spin_unlock_irqrestore(&clocks_lock, flags);
-}
-EXPORT_SYMBOL(clk_disable);
+ if (priv->delay)
+ udelay(priv->delay);
-unsigned long clk_get_rate(struct clk *clk)
-{
- unsigned long rate;
-
- rate = clk->rate;
- if (clk->ops->getrate)
- rate = clk->ops->getrate(clk);
-
- return rate;
+ return 0;
}
-EXPORT_SYMBOL(clk_get_rate);
-
-static void clk_gpio27_enable(struct clk *clk)
+void clk_cken_disable(struct clk *clk)
{
- pxa_gpio_mode(GPIO11_3_6MHz_MD);
-}
+ struct clk_cken *priv = container_of(clk, struct clk_cken, clk);
-static void clk_gpio27_disable(struct clk *clk)
-{
+ CKEN &= ~(1 << priv->cken);
}
-static const struct clkops clk_gpio27_ops = {
- .enable = clk_gpio27_enable,
- .disable = clk_gpio27_disable,
-};
-
-
-void clk_cken_enable(struct clk *clk)
+unsigned long clk_cken_get_rate(struct clk *clk)
{
- CKEN |= 1 << clk->cken;
-}
+ struct clk_cken *priv = container_of(clk, struct clk_cken, clk);
+
+ return priv->rate;
-void clk_cken_disable(struct clk *clk)
-{
- CKEN &= ~(1 << clk->cken);
}
-const struct clkops clk_cken_ops = {
+const struct clk_ops clk_cken_ops = {
.enable = clk_cken_enable,
.disable = clk_cken_disable,
+ .get_rate = clk_cken_get_rate,
+ .round_rate = clk_no_round_rate,
};
-static struct clk common_clks[] = {
- {
- .name = "GPIO27_CLK",
- .ops = &clk_gpio27_ops,
- .rate = 3686400,
- },
-};
-
-void clks_register(struct clk *clks, size_t num)
-{
- int i;
-
- mutex_lock(&clocks_mutex);
- for (i = 0; i < num; i++)
- list_add(&clks[i].node, &clocks);
- mutex_unlock(&clocks_mutex);
-}
-
static int __init clk_init(void)
{
- clks_register(common_clks, ARRAY_SIZE(common_clks));
- return 0;
+ return clk_add(NULL, &clk_gpio11);
}
arch_initcall(clk_init);
diff --git a/arch/arm/mach-pxa/clock.h b/arch/arm/mach-pxa/clock.h
index bc6b77e..599b553 100644
--- a/arch/arm/mach-pxa/clock.h
+++ b/arch/arm/mach-pxa/clock.h
@@ -1,43 +1,73 @@
-struct clk;
+#include <linux/clk.h>
+#include <linux/clocklib.h>
-struct clkops {
- void (*enable)(struct clk *);
- void (*disable)(struct clk *);
- unsigned long (*getrate)(struct clk *);
-};
-
-struct clk {
- struct list_head node;
- const char *name;
- struct device *dev;
- const struct clkops *ops;
+struct clk_cken {
+ struct clk clk;
unsigned long rate;
unsigned int cken;
unsigned int delay;
- unsigned int enabled;
};
-#define INIT_CKEN(_name, _cken, _rate, _delay, _dev) \
- { \
- .name = _name, \
- .dev = _dev, \
- .ops = &clk_cken_ops, \
- .rate = _rate, \
- .cken = CKEN_##_cken, \
- .delay = _delay, \
- }
+int clk_cken_enable(struct clk *clk);
+void clk_cken_disable(struct clk *clk);
+unsigned long clk_cken_get_rate(struct clk *clk);
+
+extern const struct clk_ops clk_cken_ops;
-#define INIT_CK(_name, _cken, _ops, _dev) \
+static inline void clk_static_release(struct clk *clk)
+{
+ printk(KERN_ERR "Can't release static clock: %s!!!\n", clk->name);
+ BUG();
+}
+
+static inline long clk_no_round_rate(struct clk *clk,
+ unsigned long hz, bool apply)
+{
+ return clk->ops->get_rate(clk);
+}
+
+#define INIT_CKEN(_name, _cken, _rate, _delay) \
+ &(struct clk_cken) { \
+ .clk.name = _name, \
+ .clk.ops = &clk_cken_ops, \
+ .clk.release = clk_static_release, \
+ .cken = CKEN_##_cken, \
+ .rate = _rate, \
+ .delay = _delay, \
+ } .clk
+
+#define INIT_CK(_name, _cken, _ops) \
+ &(struct clk_cken) { \
+ .clk.name = _name, \
+ .clk.ops = _ops, \
+ .clk.release = clk_static_release, \
+ .cken = CKEN_##_cken, \
+ } .clk
+
+#define INIT_DEVCK(_parent_name, _name, _dev) \
{ \
- .name = _name, \
- .dev = _dev, \
- .ops = _ops, \
- .cken = CKEN_##_cken, \
+ .clk.name = _name, \
+ .clk.ops = &clk_devck_ops, \
+ .clk.release = clk_static_release, \
+ .parent = _parent_name, \
+ .dev = _dev, \
}
-extern const struct clkops clk_cken_ops;
-void clk_cken_enable(struct clk *clk);
-void clk_cken_disable(struct clk *clk);
+static inline void clks_register(struct clk *parent,
+ struct clk **clks, int size)
+{
+ int i;
+ for (i = 0; i < size; i++)
+ clk_add(parent, clks[i]);
+}
-void clks_register(struct clk *clks, size_t num);
+static inline void clks_devck_register(struct clk_devck *clks, int size)
+{
+ int i;
+ for (i = 0; i < size; i++) {
+ struct clk *parent = clk_get(NULL, clks[i].parent);
+ if (parent)
+ clk_add(parent, &clks[i].clk);
+ }
+}
diff --git a/arch/arm/mach-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c
index e5b417d..b00a8b9 100644
--- a/arch/arm/mach-pxa/pxa25x.c
+++ b/arch/arm/mach-pxa/pxa25x.c
@@ -102,10 +102,10 @@ static unsigned long clk_pxa25x_lcd_getrate(struct clk *clk)
return pxa25x_get_memclk_frequency_10khz() * 10000;
}
-static const struct clkops clk_pxa25x_lcd_ops = {
+static const struct clk_ops clk_pxa25x_lcd_ops = {
.enable = clk_cken_enable,
.disable = clk_cken_disable,
- .getrate = clk_pxa25x_lcd_getrate,
+ .get_rate = clk_pxa25x_lcd_getrate,
};
/*
@@ -113,31 +113,42 @@ static const struct clkops clk_pxa25x_lcd_ops = {
* 95.842MHz -> MMC 19.169MHz, I2C 31.949MHz, FICP 47.923MHz, USB 47.923MHz
* 147.456MHz -> UART 14.7456MHz, AC97 12.288MHz, I2S 5.672MHz (allegedly)
*/
-static struct clk pxa25x_hwuart_clk =
- INIT_CKEN("UARTCLK", HWUART, 14745600, 1, &pxa_device_hwuart.dev)
-;
-
-static struct clk pxa25x_clks[] = {
- INIT_CK("LCDCLK", LCD, &clk_pxa25x_lcd_ops, &pxa_device_fb.dev),
- INIT_CKEN("UARTCLK", FFUART, 14745600, 1, &pxa_device_ffuart.dev),
- INIT_CKEN("UARTCLK", BTUART, 14745600, 1, &pxa_device_btuart.dev),
- INIT_CKEN("UARTCLK", STUART, 14745600, 1, NULL),
- INIT_CKEN("UDCCLK", USB, 47923000, 5, &pxa_device_udc.dev),
- INIT_CKEN("MMCCLK", MMC, 19169000, 0, &pxa_device_mci.dev),
- INIT_CKEN("I2CCLK", I2C, 31949000, 0, &pxa_device_i2c.dev),
-
- INIT_CKEN("SSPCLK", SSP, 3686400, 0, &pxa25x_device_ssp.dev),
- INIT_CKEN("SSPCLK", NSSP, 3686400, 0, &pxa25x_device_nssp.dev),
- INIT_CKEN("SSPCLK", ASSP, 3686400, 0, &pxa25x_device_assp.dev),
-
- INIT_CKEN("AC97CLK", AC97, 24576000, 0, NULL),
+static struct clk *pxa25x_hwuart_clk =
+ INIT_CKEN("HWUARTCLK", HWUART, 14745600, 1);
+static struct clk_devck pxa25x_hwuart_devclk =
+ INIT_DEVCK("HWUARTCLK", "UARTCLK", &pxa_device_hwuart.dev);
+
+static struct clk *pxa25x_clks[] = {
+ INIT_CK("LCDCLK", LCD, &clk_pxa25x_lcd_ops), /* &pxa_device_fb.dev */
+ INIT_CKEN("FFUARTCLK", FFUART, 14745600, 1),
+ INIT_CKEN("BTUARTCLK", BTUART, 14745600, 1),
+ INIT_CKEN("STUARTCLK", STUART, 14745600, 1),
+ INIT_CKEN("UDCCLK", USB, 47923000, 5), /* &pxa_device_udc.dev */
+ INIT_CKEN("MMCCLK", MMC, 19169000, 0), /* &pxa_device_mci.dev */
+ INIT_CKEN("I2CCLK", I2C, 31949000, 0), /* &pxa_device_i2c.dev */
+
+ INIT_CKEN("SSP_CLK", SSP, 3686400, 0),
+ INIT_CKEN("NSSPCLK", NSSP, 3686400, 0),
+ INIT_CKEN("ASSPCLK", ASSP, 3686400, 0),
+
+ INIT_CKEN("AC97CLK", AC97, 24576000, 0),
/*
- INIT_CKEN("PWMCLK", PWM0, 3686400, 0, NULL),
- INIT_CKEN("PWMCLK", PWM0, 3686400, 0, NULL),
- INIT_CKEN("I2SCLK", I2S, 14745600, 0, NULL),
+ INIT_CKEN("PWMCLK", PWM0, 3686400, 0),
+ INIT_CKEN("PWMCLK", PWM0, 3686400, 0),
+ INIT_CKEN("I2SCLK", I2S, 14745600, 0),
*/
- INIT_CKEN("FICPCLK", FICP, 47923000, 0, NULL),
+ INIT_CKEN("FICPCLK", FICP, 47923000, 0),
+};
+
+static struct clk_devck clk_children[] = {
+ INIT_DEVCK("FFUARTCLK", "UARTCLK", &pxa_device_ffuart.dev),
+ INIT_DEVCK("BTUARTCLK", "UARTCLK", &pxa_device_btuart.dev),
+ INIT_DEVCK("STUARTCLK", "UARTCLK", &pxa_device_stuart.dev),
+
+ INIT_DEVCK("SSP_CLK", "SSPCLK", &pxa25x_device_ssp.dev),
+ INIT_DEVCK("NSSPCLK", "SSPCLK", &pxa25x_device_nssp.dev),
+ INIT_DEVCK("ASSPCLK", "SSPCLK", &pxa25x_device_assp.dev),
};
#ifdef CONFIG_PM
@@ -284,11 +295,14 @@ static int __init pxa25x_init(void)
int i, ret = 0;
/* Only add HWUART for PXA255/26x; PXA210/250/27x do not have it. */
- if (cpu_is_pxa25x())
- clks_register(&pxa25x_hwuart_clk, 1);
+ if (cpu_is_pxa25x()) {
+ clk_add(NULL, pxa25x_hwuart_clk);
+ clk_add(pxa25x_hwuart_clk, &pxa25x_hwuart_devclk.clk);
+ }
if (cpu_is_pxa21x() || cpu_is_pxa25x()) {
- clks_register(pxa25x_clks, ARRAY_SIZE(pxa25x_clks));
+ clks_register(NULL, pxa25x_clks, ARRAY_SIZE(pxa25x_clks));
+ clks_devck_register(ARRAY_AND_SIZE(clk_children));
if ((ret = pxa_init_dma(16)))
return ret;
diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c
index 7e94583..6e13e78 100644
--- a/arch/arm/mach-pxa/pxa27x.c
+++ b/arch/arm/mach-pxa/pxa27x.c
@@ -45,7 +45,7 @@ unsigned int pxa27x_get_clk_frequency_khz(int info)
{
unsigned long ccsr, clkcfg;
unsigned int l, L, m, M, n2, N, S;
- int cccr_a, t, ht, b;
+ int cccr_a, t, ht, b;
ccsr = CCSR;
cccr_a = CCCR & (1 << 25);
@@ -88,7 +88,7 @@ unsigned int pxa27x_get_memclk_frequency_10khz(void)
{
unsigned long ccsr, clkcfg;
unsigned int l, L, m, M;
- int cccr_a, b;
+ int cccr_a, b;
ccsr = CCSR;
cccr_a = CCCR & (1 << 25);
@@ -130,47 +130,61 @@ static unsigned long clk_pxa27x_lcd_getrate(struct clk *clk)
return pxa27x_get_lcdclk_frequency_10khz() * 10000;
}
-static const struct clkops clk_pxa27x_lcd_ops = {
+static const struct clk_ops clk_pxa27x_lcd_ops = {
.enable = clk_cken_enable,
.disable = clk_cken_disable,
- .getrate = clk_pxa27x_lcd_getrate,
+ .get_rate = clk_pxa27x_lcd_getrate,
+ .round_rate = clk_no_round_rate,
};
-static struct clk pxa27x_clks[] = {
- INIT_CK("LCDCLK", LCD, &clk_pxa27x_lcd_ops, &pxa_device_fb.dev),
- INIT_CK("CAMCLK", CAMERA, &clk_pxa27x_lcd_ops, NULL),
+static struct clk *pxa27x_clks[] = {
+ INIT_CK("LCDCLK", LCD, &clk_pxa27x_lcd_ops), /* &pxa_device_fb.dev */
+ INIT_CK("CAMCLK", CAMERA, &clk_pxa27x_lcd_ops),
- INIT_CKEN("UARTCLK", FFUART, 14857000, 1, &pxa_device_ffuart.dev),
- INIT_CKEN("UARTCLK", BTUART, 14857000, 1, &pxa_device_btuart.dev),
- INIT_CKEN("UARTCLK", STUART, 14857000, 1, NULL),
+ INIT_CKEN("FFUARTCLK", FFUART, 14857000, 1),
+ INIT_CKEN("BTUARTCLK", BTUART, 14857000, 1),
+ INIT_CKEN("STUARTCLK", STUART, 14857000, 1),
- INIT_CKEN("I2SCLK", I2S, 14682000, 0, &pxa_device_i2s.dev),
- INIT_CKEN("I2CCLK", I2C, 32842000, 0, &pxa_device_i2c.dev),
- INIT_CKEN("UDCCLK", USB, 48000000, 5, &pxa_device_udc.dev),
- INIT_CKEN("MMCCLK", MMC, 19500000, 0, &pxa_device_mci.dev),
- INIT_CKEN("FICPCLK", FICP, 48000000, 0, &pxa_device_ficp.dev),
+ INIT_CKEN("I2SCLK", I2S, 14682000, 0), /* &pxa_device_i2s.dev */
+ INIT_CKEN("I2C_CLK", I2C, 32842000, 0),
+ INIT_CKEN("UDCCLK", USB, 48000000, 5), /* &pxa_device_udc.dev */
+ INIT_CKEN("MMCCLK", MMC, 19500000, 0), /* &pxa_device_mci.dev */
+ INIT_CKEN("FICPCLK", FICP, 48000000, 0), /* &pxa_device_ficp.dev */
- INIT_CKEN("USBCLK", USBHOST, 48000000, 0, &pxa27x_device_ohci.dev),
- INIT_CKEN("I2CCLK", PWRI2C, 13000000, 0, &pxa27x_device_i2c_power.dev),
- INIT_CKEN("KBDCLK", KEYPAD, 32768, 0, &pxa27x_device_keypad.dev),
+ INIT_CKEN("USBCLK", USBHOST, 48000000, 0), /* &pxa27x_device_ohci.dev */
+ INIT_CKEN("PWRI2CCLK", PWRI2C, 13000000, 0),
+ INIT_CKEN("KBDCLK", KEYPAD, 32768, 0), /* &pxa27x_device_keypad.dev */
- INIT_CKEN("SSPCLK", SSP1, 13000000, 0, &pxa27x_device_ssp1.dev),
- INIT_CKEN("SSPCLK", SSP2, 13000000, 0, &pxa27x_device_ssp2.dev),
- INIT_CKEN("SSPCLK", SSP3, 13000000, 0, &pxa27x_device_ssp3.dev),
+ INIT_CKEN("SSP1CLK", SSP1, 13000000, 0),
+ INIT_CKEN("SSP2CLK", SSP2, 13000000, 0),
+ INIT_CKEN("SSP3CLK", SSP3, 13000000, 0),
- INIT_CKEN("AC97CLK", AC97, 24576000, 0, NULL),
- INIT_CKEN("AC97CONFCLK", AC97CONF, 24576000, 0, NULL),
+ INIT_CKEN("AC97CLK", AC97, 24576000, 0),
+ INIT_CKEN("AC97CONFCLK", AC97CONF, 24576000, 0),
/*
- INIT_CKEN("PWMCLK", PWM0, 13000000, 0, NULL),
- INIT_CKEN("MSLCLK", MSL, 48000000, 0, NULL),
- INIT_CKEN("USIMCLK", USIM, 48000000, 0, NULL),
- INIT_CKEN("MSTKCLK", MEMSTK, 19500000, 0, NULL),
- INIT_CKEN("IMCLK", IM, 0, 0, NULL),
- INIT_CKEN("MEMCLK", MEMC, 0, 0, NULL),
+ INIT_CKEN("PWMCLK", PWM0, 13000000, 0),
+ INIT_CKEN("MSLCLK", MSL, 48000000, 0),
+ INIT_CKEN("USIMCLK", USIM, 48000000, 0),
+ INIT_CKEN("MSTKCLK", MEMSTK, 19500000, 0),
+ INIT_CKEN("IMCLK", IM, 0, 0),
+ INIT_CKEN("MEMCLK", MEMC, 0, 0),
*/
};
+static struct clk_devck clk_children[] = {
+ INIT_DEVCK("FFUARTCLK", "UARTCLK", &pxa_device_ffuart.dev),
+ INIT_DEVCK("BTUARTCLK", "UARTCLK", &pxa_device_btuart.dev),
+ INIT_DEVCK("STUARTCLK", "UARTCLK", &pxa_device_stuart.dev),
+
+ INIT_DEVCK("I2C_CLK", "I2CCLK", &pxa_device_i2c.dev),
+ INIT_DEVCK("PWRI2CCLK", "I2CCLK", &pxa27x_device_i2c_power.dev),
+
+ INIT_DEVCK("SSP1CLK", "SSPCLK", &pxa27x_device_ssp1.dev),
+ INIT_DEVCK("SSP2CLK", "SSPCLK", &pxa27x_device_ssp2.dev),
+ INIT_DEVCK("SSP3CLK", "SSPCLK", &pxa27x_device_ssp3.dev),
+};
+
#ifdef CONFIG_PM
#define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
@@ -378,7 +392,8 @@ static int __init pxa27x_init(void)
int i, ret = 0;
if (cpu_is_pxa27x()) {
- clks_register(pxa27x_clks, ARRAY_SIZE(pxa27x_clks));
+ clks_register(NULL, ARRAY_AND_SIZE(pxa27x_clks));
+ clks_devck_register(ARRAY_AND_SIZE(clk_children));
if ((ret = pxa_init_dma(32)))
return ret;
diff --git a/arch/arm/mach-pxa/pxa3xx.c b/arch/arm/mach-pxa/pxa3xx.c
index 644550b..efea4cd 100644
--- a/arch/arm/mach-pxa/pxa3xx.c
+++ b/arch/arm/mach-pxa/pxa3xx.c
@@ -21,6 +21,7 @@
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/sysdev.h>
+#include <linux/delay.h>
#include <asm/hardware.h>
#include <asm/arch/pxa3xx-regs.h>
@@ -144,46 +145,61 @@ static unsigned long clk_pxa3xx_hsio_getrate(struct clk *clk)
return hsio_clk;
}
-static void clk_pxa3xx_cken_enable(struct clk *clk)
+static int clk_pxa3xx_cken_enable(struct clk *clk)
{
- unsigned long mask = 1ul << (clk->cken & 0x1f);
+ struct clk_cken *priv = container_of(clk, struct clk_cken, clk);
+ unsigned long mask = 1ul << (priv->cken & 0x1f);
- if (clk->cken < 32)
+ if (priv->cken < 32)
CKENA |= mask;
else
CKENB |= mask;
+
+ if (priv->delay)
+ udelay(priv->delay);
+
+ return 0;
}
static void clk_pxa3xx_cken_disable(struct clk *clk)
{
- unsigned long mask = 1ul << (clk->cken & 0x1f);
+ struct clk_cken *priv = container_of(clk, struct clk_cken, clk);
+ unsigned long mask = 1ul << (priv->cken & 0x1f);
- if (clk->cken < 32)
+ if (priv->cken < 32)
CKENA &= ~mask;
else
CKENB &= ~mask;
}
-static const struct clkops clk_pxa3xx_cken_ops = {
+static const struct clk_ops clk_pxa3xx_cken_ops = {
.enable = clk_pxa3xx_cken_enable,
.disable = clk_pxa3xx_cken_disable,
+ .round_rate = clk_no_round_rate,
+ .get_rate = clk_cken_get_rate,
};
-static const struct clkops clk_pxa3xx_hsio_ops = {
+static const struct clk_ops clk_pxa3xx_hsio_ops = {
.enable = clk_pxa3xx_cken_enable,
.disable = clk_pxa3xx_cken_disable,
- .getrate = clk_pxa3xx_hsio_getrate,
+ .round_rate = clk_no_round_rate,
+ .get_rate = clk_pxa3xx_hsio_getrate,
};
-static const struct clkops clk_pxa3xx_ac97_ops = {
+static const struct clk_ops clk_pxa3xx_ac97_ops = {
.enable = clk_pxa3xx_cken_enable,
.disable = clk_pxa3xx_cken_disable,
- .getrate = clk_pxa3xx_ac97_getrate,
+ .round_rate = clk_no_round_rate,
+ .get_rate = clk_pxa3xx_ac97_getrate,
};
-static void clk_pout_enable(struct clk *clk)
+static int clk_pout_enable(struct clk *clk)
{
- OSCC |= OSCC_PEN;
+ OSCC &= ~OSCC_PEN;
+
+ udelay(70);
+
+ return 0;
}
static void clk_pout_disable(struct clk *clk)
@@ -191,58 +207,79 @@ static void clk_pout_disable(struct clk *clk)
OSCC &= ~OSCC_PEN;
}
-static const struct clkops clk_pout_ops = {
+static unsigned long clk_pout_get_rate(struct clk *clk)
+{
+ return 13000000;
+}
+
+static const struct clk_ops clk_pout_ops = {
.enable = clk_pout_enable,
.disable = clk_pout_disable,
+ .round_rate = clk_no_round_rate,
+ .get_rate = clk_pout_get_rate,
};
-#define PXA3xx_CKEN(_name, _cken, _rate, _delay, _dev) \
- { \
- .name = _name, \
- .dev = _dev, \
- .ops = &clk_pxa3xx_cken_ops, \
- .rate = _rate, \
- .cken = CKEN_##_cken, \
- .delay = _delay, \
- }
-
-#define PXA3xx_CK(_name, _cken, _ops, _dev) \
- { \
- .name = _name, \
- .dev = _dev, \
- .ops = _ops, \
- .cken = CKEN_##_cken, \
- }
-
-static struct clk pxa3xx_clks[] = {
- {
+#define PXA3xx_CKEN(_name, _cken, _rate, _delay) \
+ &(struct clk_cken) { \
+ .clk.name = _name, \
+ .clk.ops = &clk_pxa3xx_cken_ops, \
+ .clk.release = clk_static_release, \
+ .cken = CKEN_##_cken, \
+ .rate = _rate, \
+ .delay = _delay, \
+ }.clk
+
+#define PXA3xx_CK(_name, _cken, _ops) \
+ &(struct clk_cken) { \
+ .clk.name = _name, \
+ .clk.ops = _ops, \
+ .clk.release = clk_static_release, \
+ .cken = CKEN_##_cken, \
+ }.clk
+
+static struct clk *pxa3xx_clks[] = {
+ &(struct clk) {
.name = "CLK_POUT",
.ops = &clk_pout_ops,
- .rate = 13000000,
- .delay = 70,
+ .release = clk_static_release,
},
- PXA3xx_CK("LCDCLK", LCD, &clk_pxa3xx_hsio_ops, &pxa_device_fb.dev),
- PXA3xx_CK("CAMCLK", CAMERA, &clk_pxa3xx_hsio_ops, NULL),
- PXA3xx_CK("AC97CLK", AC97, &clk_pxa3xx_ac97_ops, NULL),
+ PXA3xx_CK("LCDCLK", LCD, &clk_pxa3xx_hsio_ops), /* &pxa_device_fb.dev */
+ PXA3xx_CK("CAMCLK", CAMERA, &clk_pxa3xx_hsio_ops),
+ PXA3xx_CK("AC97CLK", AC97, &clk_pxa3xx_ac97_ops),
- PXA3xx_CKEN("UARTCLK", FFUART, 14857000, 1, &pxa_device_ffuart.dev),
- PXA3xx_CKEN("UARTCLK", BTUART, 14857000, 1, &pxa_device_btuart.dev),
- PXA3xx_CKEN("UARTCLK", STUART, 14857000, 1, NULL),
+ PXA3xx_CKEN("FFUARTCLK", FFUART, 14857000, 1),
+ PXA3xx_CKEN("BTUARTCLK", BTUART, 14857000, 1),
+ PXA3xx_CKEN("STUARTCLK", STUART, 14857000, 1),
+
+ PXA3xx_CKEN("I2CCLK", I2C, 32842000, 0), /* &pxa_device_i2c.dev */
+ PXA3xx_CKEN("UDCCLK", UDC, 48000000, 5), /* &pxa_device_udc.dev */
+ PXA3xx_CKEN("USBCLK", USBH, 48000000, 0), /* &pxa27x_device_ohci.dev */
+ PXA3xx_CKEN("KBDCLK", KEYPAD, 32768, 0), /* &pxa27x_device_keypad.dev */
+
+ PXA3xx_CKEN("SSP1CLK", SSP1, 13000000, 0),
+ PXA3xx_CKEN("SSP2CLK", SSP2, 13000000, 0), /* &pxa27x_device_ssp2.dev */
+ PXA3xx_CKEN("SSP3CLK", SSP3, 13000000, 0), /* &pxa27x_device_ssp3.dev */
+ PXA3xx_CKEN("SSP4CLK", SSP4, 13000000, 0), /* &pxa3xx_device_ssp4.dev */
+
+ PXA3xx_CKEN("MMC1CLK", MMC1, 19500000, 0),
+ PXA3xx_CKEN("MMC2CLK", MMC2, 19500000, 0),
+ PXA3xx_CKEN("MMC3CLK", MMC3, 19500000, 0),
+};
- PXA3xx_CKEN("I2CCLK", I2C, 32842000, 0, &pxa_device_i2c.dev),
- PXA3xx_CKEN("UDCCLK", UDC, 48000000, 5, &pxa_device_udc.dev),
- PXA3xx_CKEN("USBCLK", USBH, 48000000, 0, &pxa27x_device_ohci.dev),
- PXA3xx_CKEN("KBDCLK", KEYPAD, 32768, 0, &pxa27x_device_keypad.dev),
+static struct clk_devck clk_children[] = {
+ INIT_DEVCK("FFUARTCLK", "UARTCLK", &pxa_device_ffuart.dev),
+ INIT_DEVCK("BTUARTCLK", "UARTCLK", &pxa_device_btuart.dev),
+ INIT_DEVCK("STUARTCLK", "UARTCLK", &pxa_device_stuart.dev),
- PXA3xx_CKEN("SSPCLK", SSP1, 13000000, 0, &pxa27x_device_ssp1.dev),
- PXA3xx_CKEN("SSPCLK", SSP2, 13000000, 0, &pxa27x_device_ssp2.dev),
- PXA3xx_CKEN("SSPCLK", SSP3, 13000000, 0, &pxa27x_device_ssp3.dev),
- PXA3xx_CKEN("SSPCLK", SSP4, 13000000, 0, &pxa3xx_device_ssp4.dev),
+ INIT_DEVCK("SSP1CLK", "SSPCLK", &pxa27x_device_ssp1.dev),
+ INIT_DEVCK("SSP2CLK", "SSPCLK", &pxa27x_device_ssp2.dev),
+ INIT_DEVCK("SSP3CLK", "SSPCLK", &pxa27x_device_ssp3.dev),
+ INIT_DEVCK("SSP4CLK", "SSPCLK", &pxa3xx_device_ssp4.dev),
- PXA3xx_CKEN("MMCCLK", MMC1, 19500000, 0, &pxa_device_mci.dev),
- PXA3xx_CKEN("MMCCLK", MMC2, 19500000, 0, &pxa3xx_device_mci2.dev),
- PXA3xx_CKEN("MMCCLK", MMC3, 19500000, 0, &pxa3xx_device_mci3.dev),
+ INIT_DEVCK("MMC1CLK", "MMCCLK", &pxa_device_mci.dev),
+ INIT_DEVCK("MMC2CLK", "MMCCLK", &pxa3xx_device_mci2.dev),
+ INIT_DEVCK("MMC3CLK", "MMCCLK", &pxa3xx_device_mci3.dev),
};
#ifdef CONFIG_PM
@@ -555,7 +592,8 @@ static int __init pxa3xx_init(void)
*/
ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S);
- clks_register(pxa3xx_clks, ARRAY_SIZE(pxa3xx_clks));
+ clks_register(NULL, ARRAY_AND_SIZE(pxa3xx_clks));
+ clks_devck_register(ARRAY_AND_SIZE(clk_children));
if ((ret = pxa_init_dma(32)))
return ret;
--
1.5.5.1
--
With best wishes
Dmitry
--
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