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drivers: pwm: mchp: Low power mode enabled

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Updated the driver with low power feature

Signed-off-by: Manimaran A <manimaran.a@microchip.com>
This commit is contained in:
Manimaran A 2023-07-19 00:24:05 +05:30 committed by Fabio Baltieri
parent 25d496949f
commit 85a70c9847
3 changed files with 189 additions and 2 deletions
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57
drivers/pwm/pwm_mchp_xec.c
View file

@ -19,6 +19,7 @@
#endif
#include <zephyr/drivers/pinctrl.h>
#include <zephyr/logging/log.h>
#include <zephyr/pm/device.h>
#include <soc.h>
@ -62,6 +63,10 @@ struct xec_params {
uint8_t div;
};
struct pwm_xec_data {
uint32_t config;
};
#define NUM_DIV_ELEMS 16
static const uint32_t max_freq_high_on_div[NUM_DIV_ELEMS] = {
@ -368,6 +373,50 @@ static int pwm_xec_get_cycles_per_sec(const struct device *dev,
return 0;
}
#ifdef CONFIG_PM_DEVICE
static int pwm_xec_pm_action(const struct device *dev, enum pm_device_action action)
{
const struct pwm_xec_config *const devcfg = dev->config;
struct pwm_regs * const regs = devcfg->regs;
struct pwm_xec_data * const data = dev->data;
int ret = 0;
switch (action) {
case PM_DEVICE_ACTION_RESUME:
ret = pinctrl_apply_state(devcfg->pcfg, PINCTRL_STATE_DEFAULT);
if (ret != 0) {
LOG_ERR("XEC PWM pinctrl setup failed (%d)", ret);
}
/* Turn on PWM only if it is ON before sleep */
if ((data->config & MCHP_PWM_CFG_ENABLE) == MCHP_PWM_CFG_ENABLE) {
regs->CONFIG |= MCHP_PWM_CFG_ENABLE;
data->config &= (~MCHP_PWM_CFG_ENABLE);
}
break;
case PM_DEVICE_ACTION_SUSPEND:
if ((regs->CONFIG & MCHP_PWM_CFG_ENABLE) == MCHP_PWM_CFG_ENABLE) {
/* Do copy first, then clear mode. */
data->config = regs->CONFIG;
regs->CONFIG &= ~(MCHP_PWM_CFG_ENABLE);
}
ret = pinctrl_apply_state(devcfg->pcfg, PINCTRL_STATE_SLEEP);
/* pinctrl-1 does not exist. */
if (ret == -ENOENT) {
ret = 0;
}
break;
default:
ret = -ENOTSUP;
}
return ret;
}
#endif /* CONFIG_PM_DEVICE */
static const struct pwm_driver_api pwm_xec_driver_api = {
.set_cycles = pwm_xec_set_cycles,
.get_cycles_per_sec = pwm_xec_get_cycles_per_sec,
@ -396,13 +445,17 @@ static int pwm_xec_init(const struct device *dev)
#define XEC_PWM_DEVICE_INIT(index) \
\
static struct pwm_xec_data pwm_xec_data_##index; \
\
PINCTRL_DT_INST_DEFINE(index); \
\
XEC_PWM_CONFIG(index); \
\
PM_DEVICE_DT_INST_DEFINE(index, pwm_xec_pm_action); \
\
DEVICE_DT_INST_DEFINE(index, &pwm_xec_init, \
NULL, \
NULL, \
PM_DEVICE_DT_INST_GET(index), \
&pwm_xec_data_##index, \
&pwm_xec_config_##index, POST_KERNEL, \
CONFIG_PWM_INIT_PRIORITY, \
&pwm_xec_driver_api);

64
dts/arm/microchip/mec152x/mec152xhsz-pinctrl.dtsi
View file

@ -1088,4 +1088,68 @@
pinmux = < MCHP_XEC_PINMUX(0155, MCHP_AF2) >;
low-power-enable;
};
/* PWM */
pwm0_gpio053_sleep: pwm0_gpio053_sleep {
pinmux = < MCHP_XEC_PINMUX(053, MCHP_AF1) >;
};
pwm0_alt_gpio241_sleep: pwm0_alt_gpio241_sleep {
pinmux = < MCHP_XEC_PINMUX(0241, MCHP_AF1) >;
};
pwm1_gpio054_sleep: pwm1_gpio054_sleep {
pinmux = < MCHP_XEC_PINMUX(054, MCHP_AF1) >;
};
pwm1_alt_gpio254_sleep: pwm1_alt_gpio254_sleep {
pinmux = < MCHP_XEC_PINMUX(0254, MCHP_AF1) >;
};
pwm2_gpio055_sleep: pwm2_gpio055_sleep {
pinmux = < MCHP_XEC_PINMUX(055, MCHP_AF1) >;
};
pwm2_alt_gpio045_sleep: pwm2_alt_gpio045_sleep {
pinmux = < MCHP_XEC_PINMUX(045, MCHP_AF2) >;
};
pwm3_gpio056_sleep: pwm3_gpio056_sleep {
pinmux = < MCHP_XEC_PINMUX(056, MCHP_AF1) >;
};
pwm3_alt_gpio047_sleep: pwm3_alt_gpio047_sleep {
pinmux = < MCHP_XEC_PINMUX(047, MCHP_AF2) >;
};
pwm4_gpio011_sleep: pwm4_gpio011_sleep {
pinmux = < MCHP_XEC_PINMUX(011, MCHP_AF2) >;
};
pwm5_gpio002_sleep: pwm5_gpio002_sleep {
pinmux = < MCHP_XEC_PINMUX(02, MCHP_AF1) >;
};
pwm6_gpio014_sleep: pwm6_gpio014_sleep {
pinmux = < MCHP_XEC_PINMUX(014, MCHP_AF1) >;
};
pwm6_alt_gpio063_sleep: pwm6_alt_gpio063_sleep {
pinmux = < MCHP_XEC_PINMUX(063, MCHP_AF2) >;
};
pwm7_gpio015_sleep: pwm7_gpio015_sleep {
pinmux = < MCHP_XEC_PINMUX(015, MCHP_AF1) >;
};
pwm7_alt_gpio061_sleep: pwm7_alt_gpio061_sleep {
pinmux = < MCHP_XEC_PINMUX(061, MCHP_AF2) >;
};
pwm8_gpio035_sleep: pwm8_gpio035_sleep {
pinmux = < MCHP_XEC_PINMUX(035, MCHP_AF1) >;
};
pwm8_alt_gpio175_sleep: pwm8_alt_gpio175_sleep {
pinmux = < MCHP_XEC_PINMUX(0175, MCHP_AF3) >;
};
};

70
dts/arm/microchip/mec172x/mec172xnsz-pinctrl.dtsi
View file

@ -1113,4 +1113,74 @@
low-power-enable;
};
/* PWM */
pwm0_gpio053_sleep: pwm0_gpio053_sleep {
pinmux = < MCHP_XEC_PINMUX(053, MCHP_AF1) >;
low-power-enable;
};
pwm0_alt_gpio241_sleep: pwm0_alt_gpio241_sleep {
pinmux = < MCHP_XEC_PINMUX(0241, MCHP_AF4) >;
low-power-enable;
};
pwm1_gpio054_sleep: pwm1_gpio054_sleep {
pinmux = < MCHP_XEC_PINMUX(054, MCHP_AF1) >;
low-power-enable;
};
pwm2_gpio055_sleep: pwm2_gpio055_sleep {
pinmux = < MCHP_XEC_PINMUX(055, MCHP_AF1) >;
low-power-enable;
};
pwm2_alt_gpio045_sleep: pwm2_alt_gpio045_sleep {
pinmux = < MCHP_XEC_PINMUX(045, MCHP_AF2) >;
low-power-enable;
};
pwm3_gpio056_sleep: pwm3_gpio056_sleep {
pinmux = < MCHP_XEC_PINMUX(056, MCHP_AF1) >;
low-power-enable;
};
pwm3_alt_gpio047_sleep: pwm3_alt_gpio047_sleep {
pinmux = < MCHP_XEC_PINMUX(047, MCHP_AF2) >;
low-power-enable;
};
pwm4_gpio011_sleep: pwm4_gpio011_sleep {
pinmux = < MCHP_XEC_PINMUX(011, MCHP_AF2) >;
low-power-enable;
};
pwm5_gpio002_sleep: pwm5_gpio002_sleep {
pinmux = < MCHP_XEC_PINMUX(02, MCHP_AF1) >;
low-power-enable;
};
pwm6_gpio014_sleep: pwm6_gpio014_sleep {
pinmux = < MCHP_XEC_PINMUX(014, MCHP_AF1) >;
low-power-enable;
};
pwm6_alt_gpio063_sleep: pwm6_alt_gpio063_sleep {
pinmux = < MCHP_XEC_PINMUX(063, MCHP_AF2) >;
low-power-enable;
};
pwm7_gpio015_sleep: pwm7_gpio015_sleep {
pinmux = < MCHP_XEC_PINMUX(015, MCHP_AF1) >;
low-power-enable;
};
pwm8_gpio035_sleep: pwm8_gpio035_sleep {
pinmux = < MCHP_XEC_PINMUX(035, MCHP_AF1) >;
low-power-enable;
};
pwm8_alt_gpio175_sleep: pwm8_alt_gpio175_sleep {
pinmux = < MCHP_XEC_PINMUX(0175, MCHP_AF3) >;
low-power-enable;
};
};