From: Minkyu Kang <mk7.kang@samsung.com>
Date: Tue, 24 Aug 2010 06:51:55 +0000 (+0900)
Subject: ARMV7: S5P: separate the peripheral clocks
X-Git-Tag: v2010.09-rc1~1^2~4^2~1
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=f70409aff3a10e22ff9c66f87e9cbc3de7cbd7f7;p=u-boot

ARMV7: S5P: separate the peripheral clocks

Because of peripheral devices can select clock sources,
separate the peripheral clocks. (pwm, uart and so on)
It just return the pclk at s5pc1xx SoC,
but s5pc210 SoC must be calculated by own clock register setting.

Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---

diff --git a/arch/arm/cpu/armv7/s5p-common/timer.c b/arch/arm/cpu/armv7/s5p-common/timer.c
index 1f1c7ff340..04906503e6 100644
--- a/arch/arm/cpu/armv7/s5p-common/timer.c
+++ b/arch/arm/cpu/armv7/s5p-common/timer.c
@@ -57,7 +57,7 @@ int timer_init(void)
 	/*
 	 * @ PWM Timer 4
 	 * Timer Freq(HZ) =
-	 *	PCLK / { (prescaler_value + 1) * (divider_value) }
+	 *	PWM_CLK / { (prescaler_value + 1) * (divider_value) }
 	 */
 
 	/* set prescaler : 16 */
@@ -68,7 +68,7 @@ int timer_init(void)
 	if (count_value == 0) {
 		/* reset initial value */
 		/* count_value = 2085937.5(HZ) (per 1 sec)*/
-		count_value = get_pclk() / ((PRESCALER_1 + 1) *
+		count_value = get_pwm_clk() / ((PRESCALER_1 + 1) *
 				(MUX_DIV_2 + 1));
 
 		/* count_value / 100 = 20859.375(HZ) (per 10 msec) */
diff --git a/arch/arm/cpu/armv7/s5pc1xx/clock.c b/arch/arm/cpu/armv7/s5pc1xx/clock.c
index c9b54856e3..98a27e551d 100644
--- a/arch/arm/cpu/armv7/s5pc1xx/clock.c
+++ b/arch/arm/cpu/armv7/s5pc1xx/clock.c
@@ -38,7 +38,8 @@
 #define CONFIG_SYS_CLK_FREQ_C110	24000000
 #endif
 
-unsigned long (*get_pclk)(void);
+unsigned long (*get_uart_clk)(int dev_index);
+unsigned long (*get_pwm_clk)(void);
 unsigned long (*get_arm_clk)(void);
 unsigned long (*get_pll_clk)(int);
 
@@ -297,15 +298,33 @@ static unsigned long s5pc100_get_pclk(void)
 	return get_pclkd1();
 }
 
+/* s5pc1xx: return uart clock frequency */
+static unsigned long s5pc1xx_get_uart_clk(int dev_index)
+{
+	if (cpu_is_s5pc110())
+		return s5pc110_get_pclk();
+	else
+		return s5pc100_get_pclk();
+}
+
+/* s5pc1xx: return pwm clock frequency */
+static unsigned long s5pc1xx_get_pwm_clk(void)
+{
+	if (cpu_is_s5pc110())
+		return s5pc110_get_pclk();
+	else
+		return s5pc100_get_pclk();
+}
+
 void s5p_clock_init(void)
 {
 	if (cpu_is_s5pc110()) {
 		get_pll_clk = s5pc110_get_pll_clk;
 		get_arm_clk = s5pc110_get_arm_clk;
-		get_pclk = s5pc110_get_pclk;
 	} else {
 		get_pll_clk = s5pc100_get_pll_clk;
 		get_arm_clk = s5pc100_get_arm_clk;
-		get_pclk = s5pc100_get_pclk;
 	}
+	get_uart_clk = s5pc1xx_get_uart_clk;
+	get_pwm_clk = s5pc1xx_get_pwm_clk;
 }
diff --git a/arch/arm/include/asm/arch-s5pc1xx/clk.h b/arch/arm/include/asm/arch-s5pc1xx/clk.h
index c25e17abd7..3488eb7c15 100644
--- a/arch/arm/include/asm/arch-s5pc1xx/clk.h
+++ b/arch/arm/include/asm/arch-s5pc1xx/clk.h
@@ -33,6 +33,7 @@ void s5p_clock_init(void);
 
 extern unsigned long (*get_pll_clk)(int pllreg);
 extern unsigned long (*get_arm_clk)(void);
-extern unsigned long (*get_pclk)(void);
+extern unsigned long (*get_pwm_clk)(void);
+extern unsigned long (*get_uart_clk)(int dev_index);
 
 #endif
diff --git a/drivers/serial/serial_s5p.c b/drivers/serial/serial_s5p.c
index 6a61b4fa5d..77096643f1 100644
--- a/drivers/serial/serial_s5p.c
+++ b/drivers/serial/serial_s5p.c
@@ -63,11 +63,11 @@ void serial_setbrg_dev(const int dev_index)
 {
 	DECLARE_GLOBAL_DATA_PTR;
 	struct s5p_uart *const uart = s5p_get_base_uart(dev_index);
-	u32 pclk = get_pclk();
+	u32 uclk = get_uart_clk(dev_index);
 	u32 baudrate = gd->baudrate;
 	u32 val;
 
-	val = pclk / baudrate;
+	val = uclk / baudrate;
 
 	writel(val / 16 - 1, &uart->ubrdiv);
 	writew(udivslot[val % 16], &uart->udivslot);