[PATCH 2/3] spi: support CS timing for HW & SW mode
From: Leilk Liu <hidden>
Date: 2021-02-07 03:12:19
Also in:
linux-arm-kernel
Subsystem:
spi subsystem, the rest · Maintainers:
Mark Brown, Linus Torvalds
From: "leilk.liu" <redacted> this patch supports the controller's HW CS and SW CS via use cs_gpio. Signed-off-by: leilk.liu <redacted> --- drivers/spi/spi.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 21ea3e8a00e2..a247fcac0dc7 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c@@ -810,7 +810,8 @@ static void spi_set_cs(struct spi_device *spi, bool enable) spi->controller->last_cs_enable = enable; spi->controller->last_cs_mode_high = spi->mode & SPI_CS_HIGH; - if (!spi->controller->set_cs_timing) { + if (spi->cs_gpiod || gpio_is_valid(spi->cs_gpio) || + !spi->controller->set_cs_timing) { if (enable1) spi_delay_exec(&spi->controller->cs_setup, NULL); else
@@ -841,7 +842,8 @@ static void spi_set_cs(struct spi_device *spi, bool enable) spi->controller->set_cs(spi, !enable); } - if (!spi->controller->set_cs_timing) { + if (spi->cs_gpiod || gpio_is_valid(spi->cs_gpio) || + !spi->controller->set_cs_timing) { if (!enable1) spi_delay_exec(&spi->controller->cs_inactive, NULL); }
@@ -3464,7 +3466,8 @@ int spi_set_cs_timing(struct spi_device *spi, struct spi_delay *setup, size_t len; int status; - if (spi->controller->set_cs_timing) { + if (spi->controller->set_cs_timing && + !(spi->cs_gpiod || gpio_is_valid(spi->cs_gpio))) { if (spi->controller->auto_runtime_pm) { status = pm_runtime_get_sync(parent); if (status < 0) {
--
2.18.0
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