Merge "clk: msm: Add reset controller support"

obj-$(CONFIG_COMMON_CLK_MSM)	+= clock-alpha-pll.o

obj-$(CONFIG_COMMON_CLK_MSM)	+= clock-rpm.o

obj-$(CONFIG_COMMON_CLK_MSM)	+= clock-voter.o

obj-$(CONFIG_COMMON_CLK_MSM)	+= reset.o

obj-$(CONFIG_MSM_CLK_CONTROLLER_V2)	+= msm-clock-controller.o

/*

 * Copyright (c) 2016, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

#include <linux/device.h>

#include <linux/delay.h>

#include <linux/io.h>

#include <linux/reset-controller.h>

#include "reset.h"

static int msm_reset(struct reset_controller_dev *rcdev, unsigned long id)

{

	rcdev->ops->assert(rcdev, id);

	udelay(1);

	rcdev->ops->deassert(rcdev, id);

	return 0;

}

static int

msm_reset_assert(struct reset_controller_dev *rcdev, unsigned long id)

{

	struct msm_reset_controller *rst;

	const struct msm_reset_map *map;

	u32 regval;

	rst = to_msm_reset_controller(rcdev);

	map = &rst->reset_map[id];

	regval = readl_relaxed(rst->base + map->reg);

	regval |= BIT(map->bit);

	writel_relaxed(regval, rst->base + map->reg);

	return 0;

}

static int

msm_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id)

{

	struct msm_reset_controller *rst;

	const struct msm_reset_map *map;

	u32 regval;

	rst = to_msm_reset_controller(rcdev);

	map = &rst->reset_map[id];

	regval = readl_relaxed(rst->base + map->reg);

	regval &= ~BIT(map->bit);

	writel_relaxed(regval, rst->base + map->reg);

	return 0;

}

struct reset_control_ops msm_reset_ops = {

	.reset = msm_reset,

	.assert = msm_reset_assert,

	.deassert = msm_reset_deassert,

};

EXPORT_SYMBOL_GPL(msm_reset_ops);

int msm_reset_controller_register(struct platform_device *pdev,

	const struct msm_reset_map *map, unsigned int num_resets,

	void __iomem *virt_base)

{

	struct msm_reset_controller *reset;

	int ret = 0;

	reset = devm_kzalloc(&pdev->dev, sizeof(*reset), GFP_KERNEL);

	if (!reset)

		return -ENOMEM;

	reset->rcdev.of_node = pdev->dev.of_node;

	reset->rcdev.ops = &msm_reset_ops;

	reset->rcdev.owner = pdev->dev.driver->owner;

	reset->rcdev.nr_resets = num_resets;

	reset->reset_map = map;

	reset->base = virt_base;

	ret = reset_controller_register(&reset->rcdev);

	if (ret)

		dev_err(&pdev->dev, "Failed to register with reset controller\n");

	return ret;

}

EXPORT_SYMBOL_GPL(msm_reset_controller_register);

/*

 * Copyright (c) 2016, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

#ifndef __DRIVERS_CLK_RESET_H

#define __DRIVERS_CLK_RESET_H

#include <linux/platform_device.h>

#include <linux/reset-controller.h>

struct msm_reset_map {

	unsigned int reg;

	u8 bit;

};

struct msm_reset_controller {

	const struct msm_reset_map *reset_map;

	struct reset_controller_dev rcdev;

	void __iomem  *base;

};

#define to_msm_reset_controller(r) \

	container_of(r, struct msm_reset_controller, rcdev)

extern struct reset_control_ops msm_reset_ops;

int msm_reset_controller_register(struct platform_device *pdev,

		const struct msm_reset_map *map, unsigned int nr_resets,

		void __iomem *virt_base);

#endif