From 512672492ccf09adb98e185243f2edace54e3ef4 Mon Sep 17 00:00:00 2001 From: Sumit Garg Date: Fri, 12 Apr 2024 15:24:34 +0530 Subject: [PATCH] serial_msm: Enable RS232 flow control SE HMIBSC board debug console requires RS232 flow control, so enable corresponding support if RS232 gpios are present. Reviewed-by: Caleb Connolly Signed-off-by: Sumit Garg Signed-off-by: Caleb Connolly --- drivers/serial/serial_msm.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/serial/serial_msm.c b/drivers/serial/serial_msm.c index 06a948a2f6..a472e0b368 100644 --- a/drivers/serial/serial_msm.c +++ b/drivers/serial/serial_msm.c @@ -63,9 +63,10 @@ #define UARTDM_TF 0x100 /* UART Transmit FIFO register */ #define UARTDM_RF 0x140 /* UART Receive FIFO register */ -#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_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; @@ -220,7 +221,8 @@ static void uart_dm_init(struct msm_serial_data *priv) } writel(bitrate, 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); -- 2.39.5