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drivers: Update Flexcomm SPI driver for clock control

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Use the clock API to get the spi clock frequency

Signed-off-by: Mahesh Mahadevan <mahesh.mahadevan@nxp.com>
This commit is contained in:
Mahesh Mahadevan 2020-08-25 16:07:16 -05:00 committed by Kumar Gala
parent 3eb3b58bb4
commit c6b3316947
1 changed files with 18 additions and 6 deletions
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24
drivers/spi/spi_mcux_flexcomm.c
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@ -9,6 +9,7 @@
#include <errno.h> #include <errno.h>
#include <drivers/spi.h> #include <drivers/spi.h>
#include <drivers/clock_control.h>
#include <fsl_spi.h> #include <fsl_spi.h>
#include <logging/log.h> #include <logging/log.h>
@ -21,11 +22,14 @@ LOG_MODULE_REGISTER(spi_mcux_flexcomm, CONFIG_SPI_LOG_LEVEL);
struct spi_mcux_config { struct spi_mcux_config {
SPI_Type *base; SPI_Type *base;
char *clock_name;
clock_control_subsys_t clock_subsys;
void (*irq_config_func)(const struct device *dev); void (*irq_config_func)(const struct device *dev);
}; };
struct spi_mcux_data { struct spi_mcux_data {
const struct device *dev; const struct device *dev;
const struct device *dev_clock;
spi_master_handle_t handle; spi_master_handle_t handle;
struct spi_context ctx; struct spi_context ctx;
size_t transfer_len; size_t transfer_len;
@ -143,6 +147,12 @@ static int spi_mcux_configure(const struct device *dev,
SPI_MasterGetDefaultConfig(&master_config); SPI_MasterGetDefaultConfig(&master_config);
/* Get the clock frequency */
if (clock_control_get_rate(data->dev_clock,
config->clock_subsys, &clock_freq)) {
return -EINVAL;
}
if (spi_cfg->slave > SPI_CHIP_SELECT_COUNT) { if (spi_cfg->slave > SPI_CHIP_SELECT_COUNT) {
LOG_ERR("Slave %d is greater than %d", LOG_ERR("Slave %d is greater than %d",
spi_cfg->slave, SPI_CHIP_SELECT_COUNT); spi_cfg->slave, SPI_CHIP_SELECT_COUNT);
@ -170,12 +180,6 @@ static int spi_mcux_configure(const struct device *dev,
master_config.baudRate_Bps = spi_cfg->frequency; master_config.baudRate_Bps = spi_cfg->frequency;
/* The clock frequency is hardcoded CPU's speed to allow SPI to
* function at high speeds. The core clock and flexcomm should
* use the same clock source.
*/
clock_freq = CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC;
SPI_MasterInit(base, &master_config, clock_freq); SPI_MasterInit(base, &master_config, clock_freq);
SPI_MasterTransferCreateHandle(base, &data->handle, SPI_MasterTransferCreateHandle(base, &data->handle,
@ -282,6 +286,11 @@ static int spi_mcux_init(const struct device *dev)
const struct spi_mcux_config *config = dev->config; const struct spi_mcux_config *config = dev->config;
struct spi_mcux_data *data = dev->data; struct spi_mcux_data *data = dev->data;
data->dev_clock = device_get_binding(config->clock_name);
if (data->dev_clock == NULL) {
return -ENODEV;
}
config->irq_config_func(dev); config->irq_config_func(dev);
data->dev = dev; data->dev = dev;
@ -304,6 +313,9 @@ static const struct spi_driver_api spi_mcux_driver_api = {
static const struct spi_mcux_config spi_mcux_config_##id = { \ static const struct spi_mcux_config spi_mcux_config_##id = { \
.base = \ .base = \
(SPI_Type *)DT_INST_REG_ADDR(id), \ (SPI_Type *)DT_INST_REG_ADDR(id), \
.clock_name = DT_INST_CLOCKS_LABEL(id), \
.clock_subsys = \
(clock_control_subsys_t)DT_INST_CLOCKS_CELL(id, name),\
.irq_config_func = spi_mcux_config_func_##id, \ .irq_config_func = spi_mcux_config_func_##id, \
}; \ }; \
static struct spi_mcux_data spi_mcux_data_##id = { \ static struct spi_mcux_data spi_mcux_data_##id = { \