diff options
| author | Fabrice Gasnier <fabrice.gasnier@foss.st.com> | 2021-04-13 19:40:15 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-22 12:11:25 +0200 |
| commit | 2aa1bbb21f26de43b55a9d9cab9c0370c15a86ed (patch) | |
| tree | 2406b41b59ee2238ad354361782291f1bd9457b3 /drivers/tty/serial/stm32-usart.h | |
| parent | 31db3ce05b1a7c045ff462761a9c6c8ebe25d620 (diff) | |
serial: stm32: add FIFO threshold configuration
Add the support for two optional DT properties, to configure RX and TX
FIFO thresholds:
- rx-threshold
- tx-threshold
This replaces hard-coded 8 bytes threshold. Keep 8 as the default value if
not specified, for backward compatibility.
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Signed-off-by: Erwan Le Ray <erwan.leray@foss.st.com>
Changes in v2:
Change added properties naming as proposed by Rob Herring.
Link: https://lore.kernel.org/r/20210413174015.23011-5-erwan.leray@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/stm32-usart.h')
| -rw-r--r-- | drivers/tty/serial/stm32-usart.h | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/drivers/tty/serial/stm32-usart.h b/drivers/tty/serial/stm32-usart.h index 77d1ac082e89..07ac291328cd 100644 --- a/drivers/tty/serial/stm32-usart.h +++ b/drivers/tty/serial/stm32-usart.h @@ -216,12 +216,6 @@ struct stm32_usart_info stm32h7_info = { #define USART_CR3_TXFTCFG_MASK GENMASK(31, 29) /* H7 */ #define USART_CR3_TXFTCFG_SHIFT 29 /* H7 */ -/* TX FIFO threashold set to half of its depth */ -#define USART_CR3_TXFTCFG_HALF 0x2 - -/* RX FIFO threashold set to half of its depth */ -#define USART_CR3_RXFTCFG_HALF 0x2 - /* USART_GTPR */ #define USART_GTPR_PSC_MASK GENMASK(7, 0) #define USART_GTPR_GT_MASK GENMASK(15, 8) @@ -273,6 +267,8 @@ struct stm32_port { bool hw_flow_control; bool swap; /* swap RX & TX pins */ bool fifoen; + int rxftcfg; /* RX FIFO threshold CFG */ + int txftcfg; /* TX FIFO threshold CFG */ bool wakeup_src; int rdr_mask; /* receive data register mask */ struct mctrl_gpios *gpios; /* modem control gpios */ |