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Commit 3ab081ef authored Nov 18, 2021 by Ruibin Chang Committed by Maureen Helm Nov 19, 2021

ITE drivers/pwm: cleanup it8xxx2 pwm driver



1.Putting the PWM_CHANNEL_X, PWM_PRESCALER_CX information
  in the description.
2.Use the common definition EC_FREQ.
3.Use the common macro IT8XXX2_DT_ALT_ITEMS_LIST.
4.Stop using DRV_CONFIG, DRV_REG macro.

Signed-off-by: Ruibin Chang <Ruibin.Chang@ite.com.tw>

parent f744303d

drivers/pwm/pwm_ite_it8xxx2.c

+31 −30

Original line number	Diff line number	Diff line
		@@ -13,16 +13,26 @@
		#include <errno.h>
		#include <kernel.h>
		#include <soc.h>
		#include <soc_dt.h>
		#include <stdlib.h>

		#include <logging/log.h>
		LOG_MODULE_REGISTER(pwm_ite_it8xxx2, CONFIG_PWM_LOG_LEVEL);

		#define PWM_CTRX_MIN 100
		#define PWM_EC_FREQ MHZ(8)
		#define PWM_FREQ EC_FREQ
		#define PCSSG_MASK 0x3

		/* Device config */
		struct pwm_alt_cfg {
		/* Pinmux control device structure */
		const struct device *pinctrls;
		/* GPIO pin */
		uint8_t pin;
		/* Alternate function */
		uint8_t alt_fun;
		};

		struct pwm_it8xxx2_cfg {
		/* PWM channel duty cycle register */
		uintptr_t reg_dcr;
		@@ -35,28 +45,16 @@ struct pwm_it8xxx2_cfg {
		/* PWM channel */
		int channel;
		/* PWM prescaler control register base */
		uintptr_t base;
		struct pwm_it8xxx2_regs *base;
		/* Select PWM prescaler that output to PWM channel */
		int prs_sel;
		/* Pinmux control device structure */
		const struct device *pinctrls;
		/* GPIO pin */
		uint8_t pin;
		/* Alternate function */
		uint8_t alt_fun;
		/* PWM alternate configuration list */
		const struct pwm_alt_cfg *alt_list;
		};

		/* Driver convenience defines */
		#define DRV_CONFIG(dev) ((const struct pwm_it8xxx2_cfg * const)(dev)->config)
		#define DRV_REG(dev) (struct pwm_it8xxx2_regs *)(DRV_CONFIG(dev)->base)
		#define DEV_PINMUX(inst) \
		DEVICE_DT_GET(DT_PHANDLE_BY_IDX(DT_NODELABEL(pinctrl_pwm##inst), pinctrls, 0))
		#define DEV_PIN(inst) DT_PHA(DT_INST_PINCTRL_0(inst, 0), pinctrls, pin)
		#define DEV_ALT_FUN(inst) DT_PHA(DT_INST_PINCTRL_0(inst, 0), pinctrls, alt_func)

		static void pwm_enable(const struct device *dev, int enabled)
		{
		const struct pwm_it8xxx2_cfg *config = DRV_CONFIG(dev);
		const struct pwm_it8xxx2_cfg *config = dev->config;
		volatile uint8_t reg_pcsgr = (uint8_t )config->reg_pcsgr;
		int ch = config->channel;

		@@ -71,15 +69,15 @@ static void pwm_enable(const struct device *dev, int enabled)
		static int pwm_it8xxx2_get_cycles_per_sec(const struct device *dev,
		uint32_t pwm, uint64_t *cycles)
		{
		const struct pwm_it8xxx2_cfg *config = DRV_CONFIG(dev);
		struct pwm_it8xxx2_regs *const inst = DRV_REG(dev);
		const struct pwm_it8xxx2_cfg *config = dev->config;
		struct pwm_it8xxx2_regs *const inst = config->base;
		int prs_sel = config->prs_sel;

		ARG_UNUSED(pwm);

		/* Get clock source cycles per second that output to prescaler */
		if ((inst->PCFSR) & BIT(prs_sel))
		*cycles = (uint64_t) PWM_EC_FREQ;
		*cycles = (uint64_t) PWM_FREQ;
		else
		*cycles = (uint64_t) 32768;

		@@ -90,8 +88,8 @@ static int pwm_it8xxx2_pin_set(const struct device *dev,
		uint32_t pwm, uint32_t period_cycles,
		uint32_t pulse_cycles, pwm_flags_t flags)
		{
		const struct pwm_it8xxx2_cfg *config = DRV_CONFIG(dev);
		struct pwm_it8xxx2_regs *const inst = DRV_REG(dev);
		const struct pwm_it8xxx2_cfg *config = dev->config;
		struct pwm_it8xxx2_regs *const inst = config->base;
		volatile uint8_t reg_dcr = (uint8_t )config->reg_dcr;
		volatile uint8_t reg_pwmpol = (uint8_t )config->reg_pwmpol;
		int ch = config->channel;
		@@ -191,8 +189,8 @@ static int pwm_it8xxx2_pin_set(const struct device *dev,

		static int pwm_it8xxx2_init(const struct device *dev)
		{
		const struct pwm_it8xxx2_cfg *config = DRV_CONFIG(dev);
		struct pwm_it8xxx2_regs *const inst = DRV_REG(dev);
		const struct pwm_it8xxx2_cfg *config = dev->config;
		struct pwm_it8xxx2_regs *const inst = config->base;
		volatile uint8_t reg_pcssg = (uint8_t )config->reg_pcssg;
		int ch = config->channel;
		int prs_sel = config->prs_sel;
		@@ -226,8 +224,9 @@ static int pwm_it8xxx2_init(const struct device *dev)
		inst->ZTIER \|= IT8XXX2_PWM_PCCE;

		/* Set alternate mode of PWM pin */
		pinmux_pin_set(config->pinctrls, config->pin, config->alt_fun);

		pinmux_pin_set(config->alt_list->pinctrls,
		config->alt_list->pin,
		config->alt_list->alt_fun);
		return 0;
		}

		@@ -238,17 +237,19 @@ static const struct pwm_driver_api pwm_it8xxx2_api = {

		/* Device Instance */
		#define PWM_IT8XXX2_INIT(inst) \
		static const struct pwm_alt_cfg \
		pwm_alt_##inst[DT_INST_NUM_PINCTRLS_BY_IDX(inst, 0)] = \
		IT8XXX2_DT_ALT_ITEMS_LIST(inst); \
		\
		static const struct pwm_it8xxx2_cfg pwm_it8xxx2_cfg_##inst = { \
		.reg_dcr = DT_INST_REG_ADDR_BY_IDX(inst, 0), \
		.reg_pcssg = DT_INST_REG_ADDR_BY_IDX(inst, 1), \
		.reg_pcsgr = DT_INST_REG_ADDR_BY_IDX(inst, 2), \
		.reg_pwmpol = DT_INST_REG_ADDR_BY_IDX(inst, 3), \
		.channel = DT_PROP(DT_INST(inst, ite_it8xxx2_pwm), channel), \
		.base = DT_REG_ADDR(DT_NODELABEL(prs)), \
		.base = (struct pwm_it8xxx2_regs *) DT_REG_ADDR(DT_NODELABEL(prs)), \
		.prs_sel = DT_PROP(DT_INST(inst, ite_it8xxx2_pwm), prescaler_cx), \
		.pinctrls = DEV_PINMUX(inst), \
		.pin = DEV_PIN(inst), \
		.alt_fun = DEV_ALT_FUN(inst), \
		.alt_list = pwm_alt_##inst, \
		}; \
		\
		DEVICE_DT_INST_DEFINE(inst, \

dts/bindings/pwm/ite,it8xxx2-pwm.yaml

+16 −11

Original line number	Diff line number	Diff line
		@@ -21,14 +21,18 @@ properties:
		type: int
		required: true
		enum:
		- 0 #PWM_CHANNEL_0
		- 1 #PWM_CHANNEL_1
		- 2 #PWM_CHANNEL_2
		- 3 #PWM_CHANNEL_3
		- 4 #PWM_CHANNEL_4
		- 5 #PWM_CHANNEL_5
		- 6 #PWM_CHANNEL_6
		- 7 #PWM_CHANNEL_7
		- 0
		- 1
		- 2
		- 3
		- 4
		- 5
		- 6
		- 7
		description: \|
		0 = PWM_CHANNEL_0, 1 = PWM_CHANNEL_1, 2 = PWM_CHANNEL_2,
		3 = PWM_CHANNEL_3, 4 = PWM_CHANNEL_4, 5 = PWM_CHANNEL_5,
		6 = PWM_CHANNEL_6, 7 = PWM_CHANNEL_7

		pwmctrl:
		type: phandle
		@@ -44,9 +48,10 @@ properties:
		type: int
		required: true
		enum:
		- 1 #PWM_PRESCALER_C4
		- 2 #PWM_PRESCALER_C6
		- 3 #PWM_PRESCALER_C7
		- 1
		- 2
		- 3
		description: 1 = PWM_PRESCALER_C4, 2 = PWM_PRESCALER_C6, 3 = PWM_PRESCALER_C7

		pwm-output-frequency:
		type: int

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