On 11/03/2024 11:10, Sumit Garg wrote:
> SE HMIBSC board debug console requires RS232 flow control, so enable
> corresponding support if RS232 gpios are present.
>
> Signed-off-by: Sumit Garg <sumit.g...@linaro.org>
Reviewed-by: Caleb Connolly <caleb.conno...@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 eaf024a55b0..7b2a3fdb2c1 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);
--
// Caleb (they/them)
