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drivers: spi: esp32xx: Add chip select setup and hold time

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Added device tree bindings and implementaion for setting the
spi controllers chip select setup and hold time settings.

Signed-off-by: Dean Sellers <dsellers@evos.com.au>
This commit is contained in:
Dean Sellers 2023-05-05 10:44:38 +10:00 committed by Carles Cufí
parent bb0a85ae4b
commit 308cec45b0
3 changed files with 23 additions and 0 deletions
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9
drivers/spi/spi_esp32_spim.c
View file

@ -338,6 +338,13 @@ static int IRAM_ATTR spi_esp32_configure(const struct device *dev,
hal_dev->mode |= BIT(1);
}
/* Chip select setup and hold times */
/* GPIO CS have their own delay parameter*/
if (!spi_cs_is_gpio(spi_cfg)) {
hal_dev->cs_hold = cfg->cs_hold;
hal_dev->cs_setup = cfg->cs_setup;
}
spi_hal_setup_device(hal, hal_dev);
/*
@ -496,6 +503,8 @@ static const struct spi_driver_api spi_api = {
.dma_enabled = DT_INST_PROP(idx, dma_enabled), \
.dma_clk_src = DT_INST_PROP(idx, dma_clk), \
.dma_host = DT_INST_PROP(idx, dma_host), \
.cs_setup = DT_INST_PROP_OR(idx, cs_setup_time, 0), \
.cs_hold = DT_INST_PROP_OR(idx, cs_hold_time, 0), \
}; \
\
DEVICE_DT_INST_DEFINE(idx, &spi_esp32_init, \

2
drivers/spi/spi_esp32_spim.h
View file

@ -36,6 +36,8 @@ struct spi_esp32_config {
bool dma_enabled;
int dma_clk_src;
int dma_host;
int cs_setup;
int cs_hold;
};
struct spi_esp32_data {

12
dts/bindings/spi/espressif,esp32-spi.yaml
View file

@ -64,3 +64,15 @@ properties:
Refer to SoC's Technical Reference Manual to check which pins are
allowed to use this routing path.
cs-setup-time:
type: int
description: |
Chip select setup time setting, see TRF for SOC for details of
timing applied.
cs-hold-time:
type: int
description: |
Chip select hold time setting, see TRF for SOC for details of
timing applied.