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drivers: pwm: pwm_mcux: Reload mode option

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DTS property "nxp,reload" selects how to load the buffered-registers
with new values.

Signed-off-by: Grixa Yrev <grixayrev@yandex.ru>
This commit is contained in:
Grixa Yrev 2022-12-14 22:37:00 +03:00 • committed by Carles Cufí
commit 15a83fe0a0
2 changed files with 22 additions and 2 deletions
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10
drivers/pwm/pwm_mcux.c
View file

@ -25,6 +25,7 @@ struct pwm_mcux_config {
const struct device *clock_dev;
clock_control_subsys_t clock_subsys;
pwm_clock_prescale_t prescale;
pwm_register_reload_t reload;
pwm_mode_t mode;
bool run_wait;
bool run_debug;
@ -80,7 +81,7 @@ static int mcux_pwm_set_cycles(const struct device *dev, uint32_t channel,
data->period_cycles[channel] = period_cycles;
LOG_DBG("SETUP dutycycle to %u\n", duty_cycle);
LOG_DBG("SETUP dutycycle to %u", duty_cycle);
if (clock_control_get_rate(config->clock_dev, config->clock_subsys,
&clock_freq)) {
@ -153,9 +154,12 @@ static int pwm_mcux_init(const struct device *dev)
return err;
}
LOG_DBG("Set prescaler %d, reload mode %d",
1 << config->prescale, config->reload);
PWM_GetDefaultConfig(&pwm_config);
pwm_config.prescale = config->prescale;
pwm_config.reloadLogic = kPWM_ReloadPwmFullCycle;
pwm_config.reloadLogic = config->reload;
pwm_config.clockSource = kPWM_BusClock;
pwm_config.enableDebugMode = config->run_debug;
pwm_config.enableWait = config->run_wait;
@ -193,6 +197,8 @@ static const struct pwm_driver_api pwm_mcux_driver_api = {
.index = DT_INST_PROP(n, index), \
.mode = kPWM_EdgeAligned, \
.prescale = _CONCAT(kPWM_Prescale_Divide_, DT_INST_PROP(n, nxp_prescaler)),\
.reload = DT_ENUM_IDX_OR(DT_DRV_INST(n), nxp_reload,\
kPWM_ReloadPwmFullCycle),\
.clock_dev = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(n)), \
.clock_subsys = (clock_control_subsys_t)DT_INST_CLOCKS_CELL(n, name),\
.run_wait = DT_INST_PROP(n, run_in_wait), \

14
dts/bindings/pwm/nxp,imx-pwm.yaml
View file

@ -33,6 +33,20 @@ properties:
description: |
Clock prescaler at the input of the PWM.
nxp,reload:
type: string
enum:
- "immediate"
- "half-cycle"
- "full-cycle"
- "half-and-full-cycle"
description: |
Select how to load the buffered-registers with new values:
"immediate" - buffered-registers get loaded with new values as soon as LDOK bit is set;
"half-cycle" - registers loaded on a PWM half cycle;
"full-cycle" - registers loaded on a PWM full cycle;
"half-and-full-cycle" - registers loaded on a PWM half & full cycle.
"#pwm-cells":
const: 2