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Revision d9e48dc2a71a836f17d1febbedb31470f957edb4 authored by Linus Torvalds on 05 December 2019, 19:28:14 UTC, committed by Linus Torvalds on 05 December 2019, 19:28:14 UTC 
Merge tag 'pwm/for-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
 
Pull pwm updates from Thierry Reding:
 "Various changes and minor fixes across a couple of drivers"

* tag 'pwm/for-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
  pwm: stm32: Pass breakinput instead of its values
  pwm: stm32: Remove clutter from ternary operator
  pwm: stm32: Validate breakinput data from DT
  pwm: Update comment on struct pwm_ops::apply
  pwm: sun4i: Fix incorrect calculation of duty_cycle/period
  pwm: stm32: Add power management support
  pwm: stm32: Split breakinput apply routine to ease PM support
  dt-bindings: pwm-stm32: Document pinctrl sleep state
  pwm: sun4i: Drop redundant assignment to variable pval
  dt-bindings: pwm: mediatek: Remove gratuitous compatible string for MT7629
2 parent s fb3da48 + 9e1b499
Raw File
qcom-pon.c 
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2017-18 Linaro Limited

#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/reboot-mode.h>
#include <linux/regmap.h>

#define PON_SOFT_RB_SPARE		0x8f

#define GEN1_REASON_SHIFT		2
#define GEN2_REASON_SHIFT		1

struct pm8916_pon {
	struct device *dev;
	struct regmap *regmap;
	u32 baseaddr;
	struct reboot_mode_driver reboot_mode;
	long reason_shift;
};

static int pm8916_reboot_mode_write(struct reboot_mode_driver *reboot,
				    unsigned int magic)
{
	struct pm8916_pon *pon = container_of
			(reboot, struct pm8916_pon, reboot_mode);
	int ret;

	ret = regmap_update_bits(pon->regmap,
				 pon->baseaddr + PON_SOFT_RB_SPARE,
				 0xfc, magic << pon->reason_shift);
	if (ret < 0)
		dev_err(pon->dev, "update reboot mode bits failed\n");

	return ret;
}

static int pm8916_pon_probe(struct platform_device *pdev)
{
	struct pm8916_pon *pon;
	int error;

	pon = devm_kzalloc(&pdev->dev, sizeof(*pon), GFP_KERNEL);
	if (!pon)
		return -ENOMEM;

	pon->dev = &pdev->dev;

	pon->regmap = dev_get_regmap(pdev->dev.parent, NULL);
	if (!pon->regmap) {
		dev_err(&pdev->dev, "failed to locate regmap\n");
		return -ENODEV;
	}

	error = of_property_read_u32(pdev->dev.of_node, "reg",
				     &pon->baseaddr);
	if (error)
		return error;

	pon->reboot_mode.dev = &pdev->dev;
	pon->reason_shift = (long)of_device_get_match_data(&pdev->dev);
	pon->reboot_mode.write = pm8916_reboot_mode_write;
	error = devm_reboot_mode_register(&pdev->dev, &pon->reboot_mode);
	if (error) {
		dev_err(&pdev->dev, "can't register reboot mode\n");
		return error;
	}

	platform_set_drvdata(pdev, pon);

	return devm_of_platform_populate(&pdev->dev);
}

static const struct of_device_id pm8916_pon_id_table[] = {
	{ .compatible = "qcom,pm8916-pon", .data = (void *)GEN1_REASON_SHIFT },
	{ .compatible = "qcom,pms405-pon", .data = (void *)GEN1_REASON_SHIFT },
	{ .compatible = "qcom,pm8998-pon", .data = (void *)GEN2_REASON_SHIFT },
	{ }
};
MODULE_DEVICE_TABLE(of, pm8916_pon_id_table);

static struct platform_driver pm8916_pon_driver = {
	.probe = pm8916_pon_probe,
	.driver = {
		.name = "pm8916-pon",
		.of_match_table = of_match_ptr(pm8916_pon_id_table),
	},
};
module_platform_driver(pm8916_pon_driver);

MODULE_DESCRIPTION("pm8916 Power On driver");
MODULE_LICENSE("GPL v2");
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