drivers: pwm: Add NXP MCUX PWM driver
This driver handles eFlexPWM submodules via MCUX hal. Each submodule has two channels (A/B). Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
This commit is contained in:
Loic Poulain
Maureen Helm
parent
df583f27a9
commit
447029d7c3
5 changed files with 345 additions and 0 deletions
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@ -13,5 +13,6 @@ zephyr_library_sources_ifdef(CONFIG_PWM_MCUX_FTM pwm_mcux_ftm.c)
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zephyr_library_sources_ifdef(CONFIG_PWM_IMX pwm_imx.c)
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zephyr_library_sources_ifdef(CONFIG_PWM_LED_ESP32 pwm_led_esp32.c)
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zephyr_library_sources_ifdef(CONFIG_PWM_SAM pwm_sam.c)
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zephyr_library_sources_ifdef(CONFIG_PWM_MCUX pwm_mcux.c)
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zephyr_library_sources_ifdef(CONFIG_USERSPACE pwm_handlers.c)
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@ -54,4 +54,6 @@ source "drivers/pwm/Kconfig.esp32"
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source "drivers/pwm/Kconfig.sam"
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source "drivers/pwm/Kconfig.mcux"
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endif # PWM
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113
drivers/pwm/Kconfig.mcux
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113
drivers/pwm/Kconfig.mcux
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@ -0,0 +1,113 @@
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# Kconfig.stm32 - STM32 PWM configuration options
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#
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#
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# Copyright (c) 2019 Linaro Limited.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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menuconfig PWM_MCUX
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bool "MCUX PWM driver"
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depends on HAS_MCUX_PWM
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help
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Enable mcux pwm driver.
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if PWM_MCUX
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config FLEXPWM1_PWM0
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bool "NXP MCUX FLEXPWM1_PWM0 Output"
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help
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Enable output for FLEXPWM1_PWM0 in the driver. Say y here
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if you want to use FLEXPWM1_PWM0 output.
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config FLEXPWM1_PWM1
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bool "NXP MCUX FLEXPWM1_PWM1 Output"
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help
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Enable output for FLEXPWM1_PWM1 in the driver. Say y here
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if you want to use FLEXPWM1_PWM1 output.
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config FLEXPWM1_PWM2
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bool "NXP MCUX FLEXPWM1_PWM2 Output"
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help
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Enable output for FLEXPWM1_PWM2 in the driver. Say y here
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if you want to use FLEXPWM1_PWM2 output.
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config FLEXPWM1_PWM3
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bool "NXP MCUX FLEXPWM1_PWM3 Output"
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help
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Enable output for FLEXPWM1_PWM3 in the driver. Say y here
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if you want to use FLEXPWM1_PWM3 output.
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config FLEXPWM2_PWM0
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bool "NXP MCUX FLEXPWM2_PWM0 Output"
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help
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Enable output for FLEXPWM2_PWM0 in the driver. Say y here
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if you want to use FLEXPWM2_PWM0 output.
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config FLEXPWM2_PWM1
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bool "NXP MCUX FLEXPWM2_PWM1 Output"
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help
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Enable output for FLEXPWM2_PWM1 in the driver. Say y here
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if you want to use FLEXPWM2_PWM1 output.
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config FLEXPWM2_PWM2
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bool "NXP MCUX FLEXPWM2_PWM2 Output"
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help
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Enable output for FLEXPWM2_PWM2 in the driver. Say y here
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if you want to use FLEXPWM2_PWM2 output.
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config FLEXPWM2_PWM3
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bool "NXP MCUX FLEXPWM2_PWM3 Output"
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help
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Enable output for FLEXPWM2_PWM3 in the driver. Say y here
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if you want to use FLEXPWM2_PWM3 output.
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config FLEXPWM3_PWM0
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bool "NXP MCUX FLEXPWM3_PWM0 Output"
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help
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Enable output for FLEXPWM3_PWM0 in the driver. Say y here
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if you want to use FLEXPWM3_PWM0 output.
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config FLEXPWM3_PWM1
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bool "NXP MCUX FLEXPWM3_PWM1 Output"
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help
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Enable output for FLEXPWM3_PWM1 in the driver. Say y here
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if you want to use FLEXPWM3_PWM1 output.
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config FLEXPWM3_PWM2
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bool "NXP MCUX FLEXPWM3_PWM2 Output"
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help
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Enable output for FLEXPWM3_PWM2 in the driver. Say y here
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if you want to use FLEXPWM3_PWM2 output.
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config FLEXPWM3_PWM3
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bool "NXP MCUX FLEXPWM3_PWM3 Output"
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help
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Enable output for FLEXPWM3_PWM3 in the driver. Say y here
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if you want to use FLEXPWM3_PWM3 output.
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config FLEXPWM4_PWM0
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bool "NXP MCUX FLEXPWM4_PWM0 Output"
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help
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Enable output for FLEXPWM4_PWM0 in the driver. Say y here
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if you want to use FLEXPWM4_PWM0 output.
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config FLEXPWM4_PWM1
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bool "NXP MCUX FLEXPWM4_PWM1 Output"
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help
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Enable output for FLEXPWM4_PWM1 in the driver. Say y here
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if you want to use FLEXPWM4_PWM1 output.
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config FLEXPWM4_PWM2
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bool "NXP MCUX FLEXPWM4_PWM2 Output"
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help
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Enable output for FLEXPWM4_PWM2 in the driver. Say y here
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if you want to use FLEXPWM4_PWM2 output.
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config FLEXPWM4_PWM3
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bool "NXP MCUX FLEXPWM4_PWM3 Output"
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help
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Enable output for FLEXPWM4_PWM3 in the driver. Say y here
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if you want to use FLEXPWM4_PWM3 output.
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endif # PWM_MCUX
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228
drivers/pwm/pwm_mcux.c
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228
drivers/pwm/pwm_mcux.c
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@ -0,0 +1,228 @@
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/*
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* Copyright (c) 2019, Linaro
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <errno.h>
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#include <pwm.h>
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#include <soc.h>
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#include <fsl_pwm.h>
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#include <fsl_clock.h>
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#define LOG_LEVEL CONFIG_PWM_LOG_LEVEL
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#include <logging/log.h>
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LOG_MODULE_REGISTER(pwm_mcux);
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#define CHANNEL_COUNT 2
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struct pwm_mcux_config {
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PWM_Type *base;
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uint8_t index;
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clock_name_t clock_source;
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pwm_clock_prescale_t prescale;
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pwm_mode_t mode;
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};
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struct pwm_mcux_data {
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uint32_t period_cycles[CHANNEL_COUNT];
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pwm_signal_param_t channel[CHANNEL_COUNT];
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};
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static int mcux_pwm_pin_set(struct device *dev, u32_t pwm,
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u32_t period_cycles, u32_t pulse_cycles)
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{
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const struct pwm_mcux_config *config = dev->config->config_info;
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struct pwm_mcux_data *data = dev->driver_data;
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u8_t duty_cycle;
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if (pwm >= CHANNEL_COUNT) {
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LOG_ERR("Invalid channel");
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return -EINVAL;
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}
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if ((period_cycles == 0) || (pulse_cycles > period_cycles)) {
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LOG_ERR("Invalid combination: period_cycles=%u, "
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"pulse_cycles=%u", period_cycles, pulse_cycles);
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return -EINVAL;
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}
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if (period_cycles > UINT16_MAX) {
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/* 16-bit resolution */
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LOG_ERR("Too long period (%u), adjust pwm prescaler!",
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period_cycles);
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/* TODO: dynamically adjust prescaler */
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return -EINVAL;
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}
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duty_cycle = 100 * pulse_cycles / period_cycles;
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/* FIXME: Force re-setup even for duty-cycle update */
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if (period_cycles != data->period_cycles[pwm]) {
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uint32_t clock_freq;
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uint32_t pwm_freq;
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status_t status;
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data->period_cycles[pwm] = period_cycles;
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LOG_DBG("SETUP dutycycle to %u\n", duty_cycle);
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clock_freq = CLOCK_GetFreq(config->clock_source);
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pwm_freq = (clock_freq >> config->prescale) / period_cycles;
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if (pwm_freq == 0) {
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LOG_ERR("Could not set up pwm_freq=%d", pwm_freq);
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return -EINVAL;
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}
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PWM_StopTimer(config->base, 1U << config->index);
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data->channel[pwm].dutyCyclePercent = duty_cycle;
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status = PWM_SetupPwm(config->base, config->index,
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&data->channel[0], CHANNEL_COUNT,
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config->mode, pwm_freq, clock_freq);
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if (status != kStatus_Success) {
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LOG_ERR("Could not set up pwm");
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return -ENOTSUP;
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}
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PWM_SetPwmLdok(config->base, 1U << config->index, true);
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PWM_StartTimer(config->base, 1U << config->index);
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} else {
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PWM_UpdatePwmDutycycle(config->base, config->index,
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(pwm == 0) ? kPWM_PwmA : kPWM_PwmB,
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config->mode, duty_cycle);
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PWM_SetPwmLdok(config->base, 1U << config->index, true);
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}
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return 0;
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}
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static int mcux_pwm_get_cycles_per_sec(struct device *dev, u32_t pwm,
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u64_t *cycles)
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{
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const struct pwm_mcux_config *config = dev->config->config_info;
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*cycles = CLOCK_GetFreq(config->clock_source) >> config->prescale;
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return 0;
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}
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static int pwm_mcux_init(struct device *dev)
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{
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const struct pwm_mcux_config *config = dev->config->config_info;
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struct pwm_mcux_data *data = dev->driver_data;
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pwm_config_t pwm_config;
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status_t status;
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PWM_GetDefaultConfig(&pwm_config);
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pwm_config.prescale = config->prescale;
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pwm_config.reloadLogic = kPWM_ReloadPwmFullCycle;
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status = PWM_Init(config->base, config->index, &pwm_config);
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if (status != kStatus_Success) {
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LOG_ERR("Unable to init PWM");
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return -EIO;
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}
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/* Disable fault sources */
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((PWM_Type *)config->base)->SM[config->index].DISMAP[0] = 0x0000;
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((PWM_Type *)config->base)->SM[config->index].DISMAP[1] = 0x0000;
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data->channel[0].pwmChannel = kPWM_PwmA;
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data->channel[0].level = kPWM_HighTrue;
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data->channel[1].pwmChannel = kPWM_PwmB;
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data->channel[1].level = kPWM_HighTrue;
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return 0;
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}
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static const struct pwm_driver_api pwm_mcux_driver_api = {
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.pin_set = mcux_pwm_pin_set,
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.get_cycles_per_sec = mcux_pwm_get_cycles_per_sec,
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};
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#define PWM_DEVICE_INIT_MCUX(n) \
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static struct pwm_mcux_data pwm_mcux_data_ ## n; \
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\
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static const struct pwm_mcux_config pwm_mcux_config_ ## n = { \
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.base = (void *)DT_PWM_MCUX_ ## n ## _BASE_ADDRESS, \
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.index = DT_PWM_MCUX_ ## n ## _INDEX, \
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.mode = kPWM_EdgeAligned, \
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.prescale = kPWM_Prescale_Divide_128, \
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.clock_source = kCLOCK_IpgClk, \
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}; \
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\
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DEVICE_AND_API_INIT(pwm_mcux_ ## n, \
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DT_PWM_MCUX_ ## n ## _NAME, \
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pwm_mcux_init, \
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&pwm_mcux_data_ ## n, \
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&pwm_mcux_config_ ## n, \
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POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,\
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&pwm_mcux_driver_api);
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#ifdef CONFIG_FLEXPWM1_PWM0
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PWM_DEVICE_INIT_MCUX(0)
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#endif
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#ifdef CONFIG_FLEXPWM1_PWM1
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PWM_DEVICE_INIT_MCUX(1)
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#endif
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#ifdef CONFIG_FLEXPWM1_PWM2
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PWM_DEVICE_INIT_MCUX(2)
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#endif
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#ifdef CONFIG_FLEXPWM1_PWM3
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PWM_DEVICE_INIT_MCUX(3)
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#endif
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#ifdef CONFIG_FLEXPWM2_PWM0
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PWM_DEVICE_INIT_MCUX(4)
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#endif
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#ifdef CONFIG_FLEXPWM2_PWM1
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PWM_DEVICE_INIT_MCUX(5)
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#endif
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#ifdef CONFIG_FLEXPWM2_PWM2
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PWM_DEVICE_INIT_MCUX(6)
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#endif
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#ifdef CONFIG_FLEXPWM2_PWM3
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PWM_DEVICE_INIT_MCUX(7)
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#endif
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#ifdef CONFIG_FLEXPWM3_PWM0
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PWM_DEVICE_INIT_MCUX(8)
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#endif
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#ifdef CONFIG_FLEXPWM3_PWM1
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PWM_DEVICE_INIT_MCUX(9)
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#endif
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#ifdef CONFIG_FLEXPWM3_PWM2
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PWM_DEVICE_INIT_MCUX(10)
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#endif
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#ifdef CONFIG_FLEXPWM3_PWM3
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PWM_DEVICE_INIT_MCUX(11)
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#endif
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#ifdef CONFIG_FLEXPWM4_PWM0
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PWM_DEVICE_INIT_MCUX(12)
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#endif
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#ifdef CONFIG_FLEXPWM4_PWM1
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PWM_DEVICE_INIT_MCUX(13)
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#endif
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#ifdef CONFIG_FLEXPWM4_PWM2
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PWM_DEVICE_INIT_MCUX(14)
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#endif
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#ifdef CONFIG_FLEXPWM4_PWM3
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PWM_DEVICE_INIT_MCUX(15)
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#endif
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@ -23,3 +23,4 @@ zephyr_sources_ifdef(CONFIG_UART_MCUX_LPUART fsl_lpuart.c)
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zephyr_sources_ifdef(CONFIG_COUNTER_MCUX_GPT fsl_gpt.c)
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zephyr_sources_ifdef(CONFIG_ETH_MCUX fsl_enet.c)
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zephyr_sources_ifdef(CONFIG_ENTROPY_MCUX_TRNG fsl_trng.c)
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zephyr_sources_ifdef(CONFIG_PWM_MCUX fsl_pwm.c)
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