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serial_msm: Enable RS232 flow control

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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>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
This commit is contained in:
Sumit Garg 2024-04-12 15:24:34 +05:30 • committed by Caleb Connolly
parent 6e992a6bc8
commit 512672492c
No known key found for this signature in database
GPG key ID: 0583312B195F64B6
1 changed files with 6 additions and 4 deletions
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4
drivers/serial/serial_msm.c
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@ -66,6 +66,7 @@
#define MSM_BOOT_UART_DM_8_N_1_MODE 0x34 #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_RX 0x10
#define MSM_BOOT_UART_DM_CMD_RESET_TX 0x20 #define MSM_BOOT_UART_DM_CMD_RESET_TX 0x20
#define MSM_UART_MR1_RX_RDY_CTL BIT(7)
DECLARE_GLOBAL_DATA_PTR; 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(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_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_RX, priv->base + UARTDM_CR);
writel(MSM_BOOT_UART_DM_CMD_RESET_TX, priv->base + UARTDM_CR); writel(MSM_BOOT_UART_DM_CMD_RESET_TX, priv->base + UARTDM_CR);