SPEAr: explicitly select clk src for UART

[platform/kernel/u-boot.git] / arch / arm / cpu / arm926ejs / spear / cpu.c

diff --git a/arch/arm/cpu/arm926ejs/spear/cpu.c b/arch/arm/cpu/arm926ejs/spear/cpu.c
index 9e074bc..e299de3 100644 (file)
--- a/arch/arm/cpu/arm926ejs/spear/cpu.c
+++ b/arch/arm/cpu/arm926ejs/spear/cpu.c
@@ -30,7 +30,7 @@ int arch_cpu_init(void)
 {
        struct misc_regs *const misc_p =
            (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
-       u32 periph1_clken;
+       u32 periph1_clken, periph_clk_cfg;
 
        periph1_clken = readl(&misc_p->periph1_clken);
 
@@ -42,6 +42,11 @@ int arch_cpu_init(void)
 
 #if defined(CONFIG_PL011_SERIAL)
        periph1_clken |= MISC_UART0ENB;
+
+       periph_clk_cfg = readl(&misc_p->periph_clk_cfg);
+       periph_clk_cfg &= ~CONFIG_SPEAR_UARTCLKMSK;
+       periph_clk_cfg |= CONFIG_SPEAR_UART48M;
+       writel(periph_clk_cfg, &misc_p->periph_clk_cfg);
 #endif
 #if defined(CONFIG_DESIGNWARE_ETH)
        periph1_clken |= MISC_ETHENB;