ARM: pxa: remove get_memclk_frequency_10khz()

Introduce 'struct clk' for memory and remove
get_memclk_frequency_10khz().

Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

arch/arm/mach-pxa/generic.c

@@ -71,19 +71,6 @@ unsigned int get_clk_frequency_khz(int info)
 }
 EXPORT_SYMBOL(get_clk_frequency_khz);
 
-/*
- * Return the current memory clock frequency in units of 10kHz
- */
-unsigned int get_memclk_frequency_10khz(void)
-{
-	if (cpu_is_pxa25x())
-		return pxa25x_get_memclk_frequency_10khz();
-	else if (cpu_is_pxa27x())
-		return pxa27x_get_memclk_frequency_10khz();
-	return 0;
-}
-EXPORT_SYMBOL(get_memclk_frequency_10khz);
-
 /*
  * Intel PXA2xx internal register mapping.
  *

arch/arm/mach-pxa/generic.h

@@ -36,18 +36,14 @@ extern unsigned int get_clk_frequency_khz(int info);
 
 #ifdef CONFIG_PXA25x
 extern unsigned pxa25x_get_clk_frequency_khz(int);
-extern unsigned pxa25x_get_memclk_frequency_10khz(void);
 #else
 #define pxa25x_get_clk_frequency_khz(x)		(0)
-#define pxa25x_get_memclk_frequency_10khz()	(0)
 #endif
 
 #ifdef CONFIG_PXA27x
 extern unsigned pxa27x_get_clk_frequency_khz(int);
-extern unsigned pxa27x_get_memclk_frequency_10khz(void);
 #else
 #define pxa27x_get_clk_frequency_khz(x)		(0)
-#define pxa27x_get_memclk_frequency_10khz()	(0)
 #endif
 
 #if defined(CONFIG_PXA25x) || defined(CONFIG_PXA27x)

arch/arm/mach-pxa/pxa25x.c

@@ -92,23 +92,21 @@ unsigned int pxa25x_get_clk_frequency_khz(int info)
 	return (turbo & 1) ? (N/1000) : (M/1000);
 }
 
-/*
+static unsigned long clk_pxa25x_mem_getrate(struct clk *clk)
- * Return the current memory clock frequency in units of 10kHz
- */
-unsigned int pxa25x_get_memclk_frequency_10khz(void)
 {
-	return L_clk_mult[(CCCR >> 0) & 0x1f] * BASE_CLK / 10000;
+	return L_clk_mult[(CCCR >> 0) & 0x1f] * BASE_CLK;
 }
 
-static unsigned long clk_pxa25x_lcd_getrate(struct clk *clk)
+static const struct clkops clk_pxa25x_mem_ops = {
-{
+	.enable		= clk_dummy_enable,
-	return pxa25x_get_memclk_frequency_10khz() * 10000;
+	.disable	= clk_dummy_disable,
-}
+	.getrate	= clk_pxa25x_mem_getrate,
+};
 
 static const struct clkops clk_pxa25x_lcd_ops = {
 	.enable		= clk_pxa2xx_cken_enable,
 	.disable	= clk_pxa2xx_cken_disable,
-	.getrate	= clk_pxa25x_lcd_getrate,
+	.getrate	= clk_pxa25x_mem_getrate,
 };
 
 static unsigned long gpio12_config_32k[] = {
@@ -185,6 +183,7 @@ static DEFINE_PXA2_CKEN(pxa25x_ficp, FICP, 47923000, 0);
 static DEFINE_CK(pxa25x_lcd, LCD, &clk_pxa25x_lcd_ops);
 static DEFINE_CLK(pxa25x_gpio11, &clk_pxa25x_gpio11_ops, 3686400, 0);
 static DEFINE_CLK(pxa25x_gpio12, &clk_pxa25x_gpio12_ops, 32768, 0);
+static DEFINE_CLK(pxa25x_mem, &clk_pxa25x_mem_ops, 0, 0);
 
 static struct clk_lookup pxa25x_clkregs[] = {
 	INIT_CLKREG(&clk_pxa25x_lcd, "pxa2xx-fb", NULL),
@@ -205,6 +204,7 @@ static struct clk_lookup pxa25x_clkregs[] = {
 	INIT_CLKREG(&clk_pxa25x_ac97, NULL, "AC97CLK"),
 	INIT_CLKREG(&clk_pxa25x_gpio11, NULL, "GPIO11_CLK"),
 	INIT_CLKREG(&clk_pxa25x_gpio12, NULL, "GPIO12_CLK"),
+	INIT_CLKREG(&clk_pxa25x_mem, "pxa2xx-pcmcia", NULL),
 };
 
 static struct clk_lookup pxa25x_hwuart_clkreg =

arch/arm/mach-pxa/pxa27x.c

@@ -111,10 +111,9 @@ unsigned int pxa27x_get_clk_frequency_khz(int info)
 }
 
 /*
- * Return the current mem clock frequency in units of 10kHz as
+ * Return the current mem clock frequency as reflected by CCCR[A], B, and L
- * reflected by CCCR[A], B, and L
  */
-unsigned int pxa27x_get_memclk_frequency_10khz(void)
+static unsigned long clk_pxa27x_mem_getrate(struct clk *clk)
 {
 	unsigned long ccsr, clkcfg;
 	unsigned int l, L, m, M;
@@ -133,9 +132,15 @@ unsigned int pxa27x_get_memclk_frequency_10khz(void)
 	L = l * BASE_CLK;
 	M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
 
-	return (M / 10000);
+	return M;
 }
 
+static const struct clkops clk_pxa27x_mem_ops = {
+	.enable		= clk_dummy_enable,
+	.disable	= clk_dummy_disable,
+	.getrate	= clk_pxa27x_mem_getrate,
+};
+
 /*
  * Return the current LCD clock frequency in units of 10kHz as
  */
@@ -192,6 +197,7 @@ static DEFINE_PXA2_CKEN(pxa27x_memc, MEMC, 0, 0);
 
 static DEFINE_CK(pxa27x_lcd, LCD, &clk_pxa27x_lcd_ops);
 static DEFINE_CK(pxa27x_camera, CAMERA, &clk_pxa27x_lcd_ops);
+static DEFINE_CLK(pxa27x_mem, &clk_pxa27x_mem_ops, 0, 0);
 
 static struct clk_lookup pxa27x_clkregs[] = {
 	INIT_CLKREG(&clk_pxa27x_lcd, "pxa2xx-fb", NULL),
@@ -220,6 +226,7 @@ static struct clk_lookup pxa27x_clkregs[] = {
 	INIT_CLKREG(&clk_pxa27x_memstk, NULL, "MSTKCLK"),
 	INIT_CLKREG(&clk_pxa27x_im, NULL, "IMCLK"),
 	INIT_CLKREG(&clk_pxa27x_memc, NULL, "MEMCLK"),
+	INIT_CLKREG(&clk_pxa27x_mem, "pxa2xx-pcmcia", NULL),
 };
 
 #ifdef CONFIG_PM

drivers/pcmcia/pxa2xx_base.c

@@ -179,8 +179,8 @@ static int pxa2xx_pcmcia_set_mcxx(struct soc_pcmcia_socket *skt, unsigned int cl
 
 static int pxa2xx_pcmcia_set_timing(struct soc_pcmcia_socket *skt)
 {
-	unsigned int clk = get_memclk_frequency_10khz();
+	unsigned long clk = clk_get_rate(skt->clk);
-	return pxa2xx_pcmcia_set_mcxx(skt, clk);
+	return pxa2xx_pcmcia_set_mcxx(skt, clk / 10000);
 }
 
 #ifdef CONFIG_CPU_FREQ
@@ -282,24 +282,33 @@ static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev)
 	struct pcmcia_low_level *ops;
 	struct skt_dev_info *sinfo;
 	struct soc_pcmcia_socket *skt;
+	struct clk *clk;
 
 	ops = (struct pcmcia_low_level *)dev->dev.platform_data;
 	if (!ops)
 		return -ENODEV;
 
+	clk = clk_get(&dev->dev, NULL);
+	if (!clk)
+		return -ENODEV;
+
 	pxa2xx_drv_pcmcia_ops(ops);
 
 	sinfo = kzalloc(SKT_DEV_INFO_SIZE(ops->nr), GFP_KERNEL);
-	if (!sinfo)
+	if (!sinfo) {
+		clk_put(clk);
 		return -ENOMEM;
+	}
 
 	sinfo->nskt = ops->nr;
+	sinfo->clk = clk;
 
 	/* Initialize processor specific parameters */
 	for (i = 0; i < ops->nr; i++) {
 		skt = &sinfo->skt[i];
 
 		skt->nr = ops->first + i;
+		skt->clk = clk;
 		skt->ops = ops;
 		skt->socket.owner = ops->owner;
 		skt->socket.dev.parent = &dev->dev;
@@ -314,6 +323,7 @@ static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev)
 		while (--i >= 0)
 			soc_pcmcia_remove_one(&sinfo->skt[i]);
 		kfree(sinfo);
+		clk_put(clk);
 	} else {
 		pxa2xx_configure_sockets(&dev->dev);
 		dev_set_drvdata(&dev->dev, sinfo);
@@ -332,6 +342,7 @@ static int pxa2xx_drv_pcmcia_remove(struct platform_device *dev)
 	for (i = 0; i < sinfo->nskt; i++)
 		soc_pcmcia_remove_one(&sinfo->skt[i]);
 
+	clk_put(sinfo->clk);
 	kfree(sinfo);
 	return 0;
 }

drivers/pcmcia/soc_common.h

@@ -10,6 +10,7 @@
 #define _ASM_ARCH_PCMCIA
 
 /* include the world */
+#include <linux/clk.h>
 #include <linux/cpufreq.h>
 #include <pcmcia/ss.h>
 #include <pcmcia/cistpl.h>
@@ -29,6 +30,7 @@ struct soc_pcmcia_socket {
 	 * Info from low level handler
 	 */
 	unsigned int		nr;
+	struct clk		*clk;
 
 	/*
 	 * Core PCMCIA state
@@ -56,6 +58,7 @@ struct soc_pcmcia_socket {
 
 struct skt_dev_info {
 	int nskt;
+	struct clk *clk;
 	struct soc_pcmcia_socket skt[0];
 };