Correct uart clock root ID. Incorrect ID may result the
clock is gated because rate value 0 is returned in
imx_get_uartclk()
The ID can be ignored if CONFIG_SKIP_LOWLEVEL_INIT is not enabled
because init_clk_uart() will enable all uart clocks in that case.
Signed-off-by: Jun Nie <jun....@linaro.org>
---
arch/arm/include/asm/arch-mx7/clock.h | 18 ++++++++++++++++++
arch/arm/mach-imx/mx7/clock.c | 2 +-
2 files changed, 19 insertions(+), 1 deletion(-)
diff --git a/arch/arm/include/asm/arch-mx7/clock.h
b/arch/arm/include/asm/arch-mx7/clock.h
index f56564e..1d07fde 100644
--- a/arch/arm/include/asm/arch-mx7/clock.h
+++ b/arch/arm/include/asm/arch-mx7/clock.h
@@ -175,6 +175,24 @@ enum clk_root_index {
CLK_ROOT_MAX,
};
+#if (CONFIG_CONS_INDEX == 0)
+#define UART_CLK_ROOT UART1_CLK_ROOT
+#elif (CONFIG_CONS_INDEX == 1)
+#define UART_CLK_ROOT UART2_CLK_ROOT
+#elif (CONFIG_CONS_INDEX == 2)
+#define UART_CLK_ROOT UART3_CLK_ROOT
+#elif (CONFIG_CONS_INDEX == 3)
+#define UART_CLK_ROOT UART4_CLK_ROOT
+#elif (CONFIG_CONS_INDEX == 4)
+#define UART_CLK_ROOT UART5_CLK_ROOT
+#elif (CONFIG_CONS_INDEX == 5)
+#define UART_CLK_ROOT UART6_CLK_ROOT
+#elif (CONFIG_CONS_INDEX == 6)
+#define UART_CLK_ROOT UART7_CLK_ROOT
+#else
+#error "Invalid IMX UART ID for serial console is defined"
+#endif
+
struct clk_root_setting {
enum clk_root_index root;
u32 setting;
diff --git a/arch/arm/mach-imx/mx7/clock.c b/arch/arm/mach-imx/mx7/clock.c
index 8cda71c..e364b16 100644
--- a/arch/arm/mach-imx/mx7/clock.c
+++ b/arch/arm/mach-imx/mx7/clock.c
@@ -53,7 +53,7 @@ static u32 get_ipg_clk(void)
u32 imx_get_uartclk(void)
{
- return get_root_clk(UART1_CLK_ROOT);
+ return get_root_clk(UART_CLK_ROOT);
}
u32 imx_get_fecclk(void)
--
2.7.4
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