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-rw-r--r--arch/arm/cpu/armv7/am33xx/board.c22
-rw-r--r--arch/arm/include/asm/arch-am33xx/sys_proto.h1
2 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/am33xx/board.c b/arch/arm/cpu/armv7/am33xx/board.c
index d3b3612..b935a29 100644
--- a/arch/arm/cpu/armv7/am33xx/board.c
+++ b/arch/arm/cpu/armv7/am33xx/board.c
@@ -166,4 +166,26 @@ void rtc32k_enable(void)
/* Enable the RTC 32K OSC by setting bits 3 and 6. */
writel((1 << 3) | (1 << 6), &rtc->osc);
}
+
+#define UART_RESET (0x1 << 1)
+#define UART_CLK_RUNNING_MASK 0x1
+#define UART_SMART_IDLE_EN (0x1 << 0x3)
+
+void uart_soft_reset(void)
+{
+ struct uart_sys *uart_base = (struct uart_sys *)DEFAULT_UART_BASE;
+ u32 regval;
+
+ regval = readl(&uart_base->uartsyscfg);
+ regval |= UART_RESET;
+ writel(regval, &uart_base->uartsyscfg);
+ while ((readl(&uart_base->uartsyssts) &
+ UART_CLK_RUNNING_MASK) != UART_CLK_RUNNING_MASK)
+ ;
+
+ /* Disable smart idle */
+ regval = readl(&uart_base->uartsyscfg);
+ regval |= UART_SMART_IDLE_EN;
+ writel(regval, &uart_base->uartsyscfg);
+}
#endif
diff --git a/arch/arm/include/asm/arch-am33xx/sys_proto.h b/arch/arm/include/asm/arch-am33xx/sys_proto.h
index cbbb54e..307ac28 100644
--- a/arch/arm/include/asm/arch-am33xx/sys_proto.h
+++ b/arch/arm/include/asm/arch-am33xx/sys_proto.h
@@ -44,4 +44,5 @@ void enable_gpmc_cs_config(const u32 *gpmc_config, struct gpmc_cs *cs, u32 base,
void omap_nand_switch_ecc(uint32_t, uint32_t);
void rtc32k_enable(void);
+void uart_soft_reset(void);
#endif