On 18/01/2024 21:54, Ramon Fried wrote:
On Tue, Dec 19, 2023 at 6:04 PM Caleb Connolly caleb.connolly@linaro.org wrote:
Introduce support for early debugging.
Signed-off-by: Caleb Connolly caleb.connolly@linaro.org
drivers/serial/Kconfig | 8 ++++++++ drivers/serial/serial_msm.c | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 40 insertions(+)
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 81fdac047824..20713812c839 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -304,6 +304,14 @@ config DEBUG_UART_S5P will need to provide parameters to make this work. The driver will be available until the real driver-model serial is running.
+config DEBUG_UART_MSM
bool "Qualcomm QUP UART debug"What is QUP ?
It's "Qualcomm Universal Peripheral".
depends on ARCH_SNAPDRAGONhelpSelect this to enable a debug UART using the serial_msm driver. Youwill need to provide parameters to make this work. The driver willbe available until the real driver-model serial is running.config DEBUG_UART_MSM_GENI bool "Qualcomm snapdragon" depends on ARCH_SNAPDRAGON diff --git a/drivers/serial/serial_msm.c b/drivers/serial/serial_msm.c index a22623c316ed..19a5a3a788f7 100644 --- a/drivers/serial/serial_msm.c +++ b/drivers/serial/serial_msm.c @@ -253,3 +253,35 @@ U_BOOT_DRIVER(serial_msm) = { .probe = msm_serial_probe, .ops = &msm_serial_ops, };
+#ifdef CONFIG_DEBUG_UART_MSM
+static struct msm_serial_data init_serial_data = {
.base = CONFIG_VAL(DEBUG_UART_BASE),.clk_bit_rate = UART_DM_CLK_RX_TX_BIT_RATE,+};
+#include <debug_uart.h>
+static inline void _debug_uart_init(void) +{
uart_dm_init(&init_serial_data);+}
+static inline void _debug_uart_putc(int ch) +{
struct msm_serial_data *priv = &init_serial_data;while (!(readl(priv->base + UARTDM_SR) & UARTDM_SR_TX_EMPTY) &&!(readl(priv->base + UARTDM_ISR) & UARTDM_ISR_TX_READY));writel(UARTDM_CR_CMD_RESET_TX_READY, priv->base + UARTDM_CR);writel(1, priv->base + UARTDM_NCF_TX);writel(ch, priv->base + UARTDM_TF);+}
+DEBUG_UART_FUNCS
+#endif
-- 2.42.1