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esp32c3: Fix issue #5377 UART1 not working because clock as disabled

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This commit is contained in:
Alan C. Assis 2022-02-10 16:09:06 -03:00 • committed by Xiang Xiao
parent eac13a113d
commit d49ad207ef
3 changed files with 44 additions and 0 deletions
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27
arch/risc-v/src/esp32c3/esp32c3_lowputc.c
View file

@ -666,6 +666,31 @@ void esp32c3_lowputc_rst_rxfifo(const struct esp32c3_uart_s *priv)
modifyreg32(UART_CONF0_REG(priv->id), UART_RXFIFO_RST_M, 0);
}
/****************************************************************************
* Name: esp32c3_lowputc_enable_sysclk
*
* Description:
* Enable clock for the UART using the System register.
*
* Parameters:
* priv - Pointer to the private driver struct.
*
****************************************************************************/
void esp32c3_lowputc_enable_sysclk(const struct esp32c3_uart_s *priv)
{
if (priv->id == 0)
{
modifyreg32(SYSTEM_PERIP_CLK_EN0_REG, 0,
SYSTEM_UART_CLK_EN_M);
}
else
{
modifyreg32(SYSTEM_PERIP_CLK_EN0_REG, 0,
SYSTEM_UART1_CLK_EN_M);
}
}
/****************************************************************************
* Name: esp32c3_lowputc_disable_all_uart_int
*
@ -836,12 +861,14 @@ void esp32c3_lowsetup(void)
#ifdef CONFIG_ESP32C3_UART0
esp32c3_lowputc_enable_sysclk(&g_uart0_config);
esp32c3_lowputc_config_pins(&g_uart0_config);
#endif
#ifdef CONFIG_ESP32C3_UART1
esp32c3_lowputc_enable_sysclk(&g_uart1_config);
esp32c3_lowputc_config_pins(&g_uart1_config);
#endif

13
arch/risc-v/src/esp32c3/esp32c3_lowputc.h
View file

@ -409,6 +409,19 @@ void esp32c3_lowputc_rst_txfifo(const struct esp32c3_uart_s *priv);
void esp32c3_lowputc_rst_rxfifo(const struct esp32c3_uart_s *priv);
/****************************************************************************
* Name: esp32c3_lowputc_enable_sysclk
*
* Description:
* Enable clock for the UART using the System register.
*
* Parameters:
* priv - Pointer to the private driver struct.
*
****************************************************************************/
void esp32c3_lowputc_enable_sysclk(const struct esp32c3_uart_s *priv);
/****************************************************************************
* Name: esp32c3_lowputc_disable_all_uart_int
*

4
arch/risc-v/src/esp32c3/esp32c3_serial.c
View file

@ -335,6 +335,10 @@ static int esp32c3_setup(struct uart_dev_s *dev)
modifyreg32(UART_MEM_CONF_REG(priv->id), UART_TX_SIZE_M | UART_RX_SIZE_M,
(1 << UART_TX_SIZE_S) | (1 << UART_RX_SIZE_S));
/* Enable the UART Clock */
esp32c3_lowputc_enable_sysclk(priv);
/* Configure the UART Baud Rate */
esp32c3_lowputc_baud(priv);