diff options
| author | Tom Rini <trini@konsulko.com> | 2023-08-16 11:23:58 -0400 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2023-08-16 11:23:58 -0400 |
| commit | 375fea811d3e45b47ee8a60f1f36a1d036660736 (patch) | |
| tree | a1453abc075dc3c602124909a13413219f425841 /drivers/serial/serial_stm32.c | |
| parent | 9b54b0e37b72aa9bfff09cbbe13465abfa143f84 (diff) | |
| parent | 9e8cbea1a74516235820ccd50d513c961e43cb70 (diff) | |
Merge tag 'u-boot-stm32-20230816' of https://source.denx.de/u-boot/custodians/u-boot-stm
DHSOM: Power cycle Buck3 in reset
DHCOM: Switch DWMAC RMII clock to MCO2
stm32f746: fix display pinmux
stm32mp: psci: Inhibit PDDS because CSTBYDIS is set
stm32mp1: DT alignment with v6.4
stm32mp1: add splashscreen with STMicroelectronics logo
stm32mp1: clk: remove error for disabled clock in stm32mp1_clk_get_parent
serial: stm32: Extend TC timeout
Diffstat (limited to 'drivers/serial/serial_stm32.c')
| -rw-r--r-- | drivers/serial/serial_stm32.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/serial/serial_stm32.c b/drivers/serial/serial_stm32.c index 0085113f674..23d476fba28 100644 --- a/drivers/serial/serial_stm32.c +++ b/drivers/serial/serial_stm32.c @@ -22,6 +22,14 @@ #include "serial_stm32.h" #include <dm/device_compat.h> +/* + * At 115200 bits/s + * 1 bit = 1 / 115200 = 8,68 us + * 8 bits = 69,444 us + * 10 bits are needed for worst case (8 bits + 1 start + 1 stop) = 86.806 us + */ +#define ONE_BYTE_B115200_US 87 + static void _stm32_serial_setbrg(fdt_addr_t base, struct stm32_uart_info *uart_info, u32 clock_rate, @@ -209,12 +217,10 @@ static int stm32_serial_probe(struct udevice *dev) * before uart initialization, wait for TC bit (Transmission Complete) * in case there is still chars from previous bootstage to transmit */ - ret = read_poll_timeout(readl, isr, isr & USART_ISR_TC, 10, 150, - plat->base + ISR_OFFSET(stm32f4)); - if (ret) { - clk_disable(&clk); - return ret; - } + ret = read_poll_timeout(readl, isr, isr & USART_ISR_TC, 50, + 16 * ONE_BYTE_B115200_US, plat->base + ISR_OFFSET(stm32f4)); + if (ret) + dev_dbg(dev, "FIFO not empty, some character can be lost (%d)\n", ret); ret = reset_get_by_index(dev, 0, &reset); if (!ret) { |