[U-Boot] [PATCH 1/4] Exynos5: Add clock support for SATA
Vasanth Ananthan
vasanthananthan at gmail.com
Thu Nov 22 14:41:03 CET 2012
This patch adds clock support for SATA
Signed-off-by: Vasanth Ananthan <vasanth.a at samsung.com>
---
arch/arm/cpu/armv7/exynos/clock.c | 22 ++++++++++++++++++++++
arch/arm/include/asm/arch-exynos/clk.h | 1 +
2 files changed, 23 insertions(+)
diff --git a/arch/arm/cpu/armv7/exynos/clock.c b/arch/arm/cpu/armv7/exynos/clock.c
index fe61f88..22b327b 100644
--- a/arch/arm/cpu/armv7/exynos/clock.c
+++ b/arch/arm/cpu/armv7/exynos/clock.c
@@ -26,6 +26,7 @@
#include <asm/arch/clock.h>
#include <asm/arch/clk.h>
#include <asm/arch/periph.h>
+#include <asm/errno.h>
/* Epll Clock division values to achive different frequency output */
static struct set_epll_con_val exynos5_epll_div[] = {
@@ -326,6 +327,19 @@ static unsigned long exynos4_get_uart_clk(int dev_index)
return uclk;
}
+static unsigned long exynos5_get_sata_clk(void)
+{
+ struct exynos5_clock *clk =
+ (struct exynos5_clock *)samsung_get_base_clock();
+
+ /*
+ * This clock is used as a input for 1ms timer, so return
+ * the clock equivalent to 1 MHz
+ */
+
+ return CONFIG_SYS_CLK_FREQ / 10;
+}
+
/* exynos5: return uart clock frequency */
static unsigned long exynos5_get_uart_clk(int dev_index)
{
@@ -963,6 +977,14 @@ unsigned long get_uart_clk(int dev_index)
return exynos4_get_uart_clk(dev_index);
}
+unsigned long get_sata_clock(void)
+{
+ if (cpu_is_exynos5())
+ return exynos5_get_sata_clk();
+
+ return -ENOSYS;
+}
+
void set_mmc_clk(int dev_index, unsigned int div)
{
if (cpu_is_exynos5())
diff --git a/arch/arm/include/asm/arch-exynos/clk.h b/arch/arm/include/asm/arch-exynos/clk.h
index cd12323..182ed95 100644
--- a/arch/arm/include/asm/arch-exynos/clk.h
+++ b/arch/arm/include/asm/arch-exynos/clk.h
@@ -42,5 +42,6 @@ void set_i2s_clk_source(void);
int set_i2s_clk_prescaler(unsigned int src_frq, unsigned int dst_frq);
int set_epll_clk(unsigned long rate);
int set_spi_clk(int periph_id, unsigned int rate);
+unsigned long get_sata_clk(void);
#endif
--
1.7.9.5
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