Commit 28517c8b authored by Dimitri Fedrau's avatar Dimitri Fedrau Committed by Uwe Kleine-König
Browse files

pwm: mc33xs2410: add hwmon support 



Support for hwmon is provided by a separate driver residing in hwmon
subsystem which is implemented as auxiliary device. Add handling of this
device.

Signed-off-by: default avatarDimitri Fedrau <dimitri.fedrau@liebherr.com>
Link: https://lore.kernel.org/r/20250723-mc33xs2410-hwmon-v5-1-f62aab71cd59@liebherr.com


Signed-off-by: default avatarUwe Kleine-König <ukleinek@kernel.org>
parent a5824695

drivers/pwm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -436,6 +436,7 @@ config PWM_MC33XS2410 
	tristate "MC33XS2410 PWM support"

	depends on OF

	depends on SPI

	select AUXILIARY_BUS

	help

	  NXP MC33XS2410 high-side switch driver. The MC33XS2410 is a four

	  channel high-side switch. The device is operational from 3.0 V

drivers/pwm/pwm-mc33xs2410.c

+18 −2
Original line number Diff line number Diff line
@@ -17,11 +17,14 @@ 
 *   behavior of the output pin that is neither the old nor the new state,

 *   rather something in between.

 */

#define DEFAULT_SYMBOL_NAMESPACE		"PWM_MC33XS2410"



#include <linux/auxiliary_bus.h>

#include <linux/bitfield.h>

#include <linux/delay.h>

#include <linux/err.h>

#include <linux/math64.h>

#include <linux/mc33xs2410.h>

#include <linux/minmax.h>

#include <linux/module.h>

#include <linux/of.h>
@@ -120,12 +123,19 @@ static int mc33xs2410_read_reg(struct spi_device *spi, u8 reg, u16 *val, u8 flag 
	return mc33xs2410_read_regs(spi, &reg, flag, val, 1);

}



static int mc33xs2410_read_reg_ctrl(struct spi_device *spi, u8 reg, u16 *val)

int mc33xs2410_read_reg_ctrl(struct spi_device *spi, u8 reg, u16 *val)

{

	return mc33xs2410_read_reg(spi, reg, val, MC33XS2410_FRAME_IN_DATA_RD);

}

EXPORT_SYMBOL_GPL(mc33xs2410_read_reg_ctrl);



static int mc33xs2410_modify_reg(struct spi_device *spi, u8 reg, u8 mask, u8 val)

int mc33xs2410_read_reg_diag(struct spi_device *spi, u8 reg, u16 *val)

{

	return mc33xs2410_read_reg(spi, reg, val, 0);

}

EXPORT_SYMBOL_GPL(mc33xs2410_read_reg_diag);



int mc33xs2410_modify_reg(struct spi_device *spi, u8 reg, u8 mask, u8 val)

{

	u16 tmp;

	int ret;
@@ -139,6 +149,7 @@ static int mc33xs2410_modify_reg(struct spi_device *spi, u8 reg, u8 mask, u8 val 


	return mc33xs2410_write_reg(spi, reg, tmp);

}

EXPORT_SYMBOL_GPL(mc33xs2410_modify_reg);



static u8 mc33xs2410_pwm_get_freq(u64 period)

{
@@ -314,6 +325,7 @@ static int mc33xs2410_reset(struct device *dev) 
static int mc33xs2410_probe(struct spi_device *spi)

{

	struct device *dev = &spi->dev;

	struct auxiliary_device *adev;

	struct pwm_chip *chip;

	int ret;
@@ -361,6 +373,10 @@ static int mc33xs2410_probe(struct spi_device *spi) 
	if (ret < 0)

		return dev_err_probe(dev, ret, "Failed to add pwm chip\n");



	adev = devm_auxiliary_device_create(dev, "hwmon", NULL);

	if (!adev)

		return dev_err_probe(dev, -ENODEV, "Failed to register hwmon device\n");



	return 0;

}

include/linux/mc33xs2410.h

0 → 100644
+16 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

/*

 * Copyright (C) 2024 Liebherr-Electronics and Drives GmbH

 */

#ifndef _MC33XS2410_H

#define _MC33XS2410_H



#include <linux/spi/spi.h>



MODULE_IMPORT_NS("PWM_MC33XS2410");



int mc33xs2410_read_reg_ctrl(struct spi_device *spi, u8 reg, u16 *val);

int mc33xs2410_read_reg_diag(struct spi_device *spi, u8 reg, u16 *val);

int mc33xs2410_modify_reg(struct spi_device *spi, u8 reg, u8 mask, u8 val);



#endif /* _MC33XS2410_H */