SE HMIBSC board debug console requires RS232 flow control, so enable corresponding support if RS232 gpios are present.
Reviewed-by: Caleb Connolly caleb.connolly@linaro.org Signed-off-by: Sumit Garg sumit.garg@linaro.org --- drivers/serial/serial_msm.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/serial/serial_msm.c b/drivers/serial/serial_msm.c index 4de10e75191..3142ecf7362 100644 --- a/drivers/serial/serial_msm.c +++ b/drivers/serial/serial_msm.c @@ -53,10 +53,11 @@ #define UARTDM_TF 0x100 /* UART Transmit FIFO register */ #define UARTDM_RF 0x140 /* UART Receive FIFO register */
-#define UART_DM_CLK_RX_TX_BIT_RATE 0xCC -#define MSM_BOOT_UART_DM_8_N_1_MODE 0x34 -#define MSM_BOOT_UART_DM_CMD_RESET_RX 0x10 -#define MSM_BOOT_UART_DM_CMD_RESET_TX 0x20 +#define UART_DM_CLK_RX_TX_BIT_RATE 0xCC +#define MSM_BOOT_UART_DM_8_N_1_MODE 0x34 +#define MSM_BOOT_UART_DM_CMD_RESET_RX 0x10 +#define MSM_BOOT_UART_DM_CMD_RESET_TX 0x20 +#define MSM_UART_MR1_RX_RDY_CTL BIT(7)
DECLARE_GLOBAL_DATA_PTR;
@@ -182,7 +183,9 @@ static void uart_dm_init(struct msm_serial_data *priv) mdelay(5);
writel(priv->clk_bit_rate, priv->base + UARTDM_CSR); - writel(0x0, priv->base + UARTDM_MR1); + + /* Enable RS232 flow control to support RS232 db9 connector */ + writel(MSM_UART_MR1_RX_RDY_CTL, priv->base + UARTDM_MR1); writel(MSM_BOOT_UART_DM_8_N_1_MODE, priv->base + UARTDM_MR2); writel(MSM_BOOT_UART_DM_CMD_RESET_RX, priv->base + UARTDM_CR); writel(MSM_BOOT_UART_DM_CMD_RESET_TX, priv->base + UARTDM_CR);