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drivers: spi_dw: initialize all cs gpios during init

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In case when we have multiple devices connected to the
one SPI interface the initial state of CS gpios after
MCU reset is floating and it might be low that prevents us from
communicating between particular devices. Fix that by
initializing all provided cs gpios and setting them as inactive.

Signed-off-by: Bartosz Bilas <bartosz.bilas@hotmail.com>
This commit is contained in:
Bartosz Bilas 2021-10-07 17:04:09 +02:00 • committed by Carles Cufí
commit 70a65b229b
1 changed files with 10 additions and 2 deletions
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12
drivers/spi/spi_dw.c
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@ -258,8 +258,6 @@ static int spi_dw_configure(const struct spi_dw_config *info,
write_ser(1 << config->slave, info->regs);
}
spi_context_cs_configure(&spi->ctx);
if (spi_dw_is_slave(spi)) {
LOG_DBG("Installed slave config %p:"
" ws/dfs %u/%u, mode %u/%u/%u",
@ -517,6 +515,7 @@ static const struct spi_driver_api dw_spi_api = {
int spi_dw_init(const struct device *dev)
{
int err;
const struct spi_dw_config *info = dev->config;
struct spi_dw_data *spi = dev->data;
@ -528,6 +527,11 @@ int spi_dw_init(const struct device *dev)
LOG_DBG("Designware SPI driver initialized on device: %p", dev);
err = spi_context_cs_configure_all(&spi->ctx);
if (err < 0) {
return err;
}
spi_context_unlock_unconditionally(&spi->ctx);
return 0;
@ -540,6 +544,7 @@ void spi_config_0_irq(void);
struct spi_dw_data spi_dw_data_port_0 = {
SPI_CONTEXT_INIT_LOCK(spi_dw_data_port_0, ctx),
SPI_CONTEXT_INIT_SYNC(spi_dw_data_port_0, ctx),
SPI_CONTEXT_CS_GPIOS_INITIALIZE(DT_DRV_INST(0), ctx)
};
#if DT_NODE_HAS_PROP(DT_INST_PHANDLE(0, clocks), clock_frequency)
@ -603,6 +608,7 @@ void spi_config_1_irq(void);
struct spi_dw_data spi_dw_data_port_1 = {
SPI_CONTEXT_INIT_LOCK(spi_dw_data_port_1, ctx),
SPI_CONTEXT_INIT_SYNC(spi_dw_data_port_1, ctx),
SPI_CONTEXT_CS_GPIOS_INITIALIZE(DT_DRV_INST(1), ctx)
};
#if DT_NODE_HAS_PROP(DT_INST_PHANDLE(1, clocks), clock_frequency)
@ -666,6 +672,7 @@ void spi_config_2_irq(void);
struct spi_dw_data spi_dw_data_port_2 = {
SPI_CONTEXT_INIT_LOCK(spi_dw_data_port_2, ctx),
SPI_CONTEXT_INIT_SYNC(spi_dw_data_port_2, ctx),
SPI_CONTEXT_CS_GPIOS_INITIALIZE(DT_DRV_INST(2), ctx)
};
#if DT_NODE_HAS_PROP(DT_INST_PHANDLE(2, clocks), clock_frequency)
@ -729,6 +736,7 @@ void spi_config_3_irq(void);
struct spi_dw_data spi_dw_data_port_3 = {
SPI_CONTEXT_INIT_LOCK(spi_dw_data_port_3, ctx),
SPI_CONTEXT_INIT_SYNC(spi_dw_data_port_3, ctx),
SPI_CONTEXT_CS_GPIOS_INITIALIZE(DT_DRV_INST(3), ctx)
};
#if DT_NODE_HAS_PROP(DT_INST_PHANDLE(3, clocks), clock_frequency)