clk: Add driver for Maxim 77802 PMIC clocks (83ccf16c) · Commits · 戴 / test

drivers/clk/Kconfig

+7 −0

Original line number	Diff line number	Diff line
		@@ -42,6 +42,13 @@ config COMMON_CLK_MAX77686
		---help---
		This driver supports Maxim 77686 crystal oscillator clock.

		config COMMON_CLK_MAX77802
		tristate "Clock driver for Maxim 77802 PMIC"
		depends on MFD_MAX77686
		select COMMON_CLK_MAX_GEN
		---help---
		This driver supports Maxim 77802 crystal oscillator clock.

		config COMMON_CLK_SI5351
		tristate "Clock driver for SiLabs 5351A/B/C"
		depends on I2C

drivers/clk/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -24,6 +24,7 @@ obj-$(CONFIG_ARCH_HIGHBANK) += clk-highbank.o
		obj-$(CONFIG_MACH_LOONGSON1) += clk-ls1x.o
		obj-$(CONFIG_COMMON_CLK_MAX_GEN) += clk-max-gen.o
		obj-$(CONFIG_COMMON_CLK_MAX77686) += clk-max77686.o
		obj-$(CONFIG_COMMON_CLK_MAX77802) += clk-max77802.o
		obj-$(CONFIG_ARCH_MOXART) += clk-moxart.o
		obj-$(CONFIG_ARCH_NOMADIK) += clk-nomadik.o
		obj-$(CONFIG_ARCH_NSPIRE) += clk-nspire.o

drivers/clk/clk-max77802.c

0 → 100644

+98 −0

Original line number	Diff line number	Diff line
		/*
		* clk-max77802.c - Clock driver for Maxim 77802
		*
		* Copyright (C) 2014 Google, Inc
		*
		* Copyright (C) 2012 Samsung Electornics
		* Jonghwa Lee <jonghwa3.lee@samsung.com>
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms of the GNU General Public License as published by the
		* Free Software Foundation; either version 2 of the License, or (at your
		* option) any later version.
		*
		* 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.
		*
		* This driver is based on clk-max77686.c
		*/

		#include <linux/kernel.h>
		#include <linux/slab.h>
		#include <linux/err.h>
		#include <linux/platform_device.h>
		#include <linux/mfd/max77686-private.h>
		#include <linux/clk-provider.h>
		#include <linux/mutex.h>
		#include <linux/clkdev.h>

		#include <dt-bindings/clock/maxim,max77802.h>
		#include "clk-max-gen.h"

		#define MAX77802_CLOCK_OPMODE_MASK 0x1
		#define MAX77802_CLOCK_LOW_JITTER_SHIFT 0x3

		static struct clk_init_data max77802_clks_init[MAX77802_CLKS_NUM] = {
		[MAX77802_CLK_32K_AP] = {
		.name = "32khz_ap",
		.ops = &max_gen_clk_ops,
		.flags = CLK_IS_ROOT,
		},
		[MAX77802_CLK_32K_CP] = {
		.name = "32khz_cp",
		.ops = &max_gen_clk_ops,
		.flags = CLK_IS_ROOT,
		},
		};

		static int max77802_clk_probe(struct platform_device *pdev)
		{
		struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
		int ret;

		ret = max_gen_clk_probe(pdev, iodev->regmap, MAX77802_REG_32KHZ,
		max77802_clks_init, MAX77802_CLKS_NUM);

		if (ret) {
		dev_err(&pdev->dev, "generic probe failed %d\n", ret);
		return ret;
		}

		/* Enable low-jitter mode on the 32khz clocks. */
		ret = regmap_update_bits(iodev->regmap, MAX77802_REG_32KHZ,
		1 << MAX77802_CLOCK_LOW_JITTER_SHIFT,
		1 << MAX77802_CLOCK_LOW_JITTER_SHIFT);
		if (ret < 0)
		dev_err(&pdev->dev, "failed to enable low-jitter mode\n");

		return ret;
		}

		static int max77802_clk_remove(struct platform_device *pdev)
		{
		return max_gen_clk_remove(pdev, MAX77802_CLKS_NUM);
		}

		static const struct platform_device_id max77802_clk_id[] = {
		{ "max77802-clk", 0},
		{ },
		};
		MODULE_DEVICE_TABLE(platform, max77802_clk_id);

		static struct platform_driver max77802_clk_driver = {
		.driver = {
		.name = "max77802-clk",
		.owner = THIS_MODULE,
		},
		.probe = max77802_clk_probe,
		.remove = max77802_clk_remove,
		.id_table = max77802_clk_id,
		};

		module_platform_driver(max77802_clk_driver);

		MODULE_DESCRIPTION("MAXIM 77802 Clock Driver");
		MODULE_AUTHOR("Javier Martinez Canillas <javier.martinez@collabora.co.uk>");
		MODULE_LICENSE("GPL");

include/dt-bindings/clock/maxim,max77802.h

0 → 100644

+22 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2014 Google, Inc
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 as
		* published by the Free Software Foundation.
		*
		* Device Tree binding constants clocks for the Maxim 77802 PMIC.
		*/

		#ifndef _DT_BINDINGS_CLOCK_MAXIM_MAX77802_CLOCK_H
		#define _DT_BINDINGS_CLOCK_MAXIM_MAX77802_CLOCK_H

		/* Fixed rate clocks. */

		#define MAX77802_CLK_32K_AP 0
		#define MAX77802_CLK_32K_CP 1

		/* Total number of clocks. */
		#define MAX77802_CLKS_NUM (MAX77802_CLK_32K_CP + 1)

		#endif /* _DT_BINDINGS_CLOCK_MAXIM_MAX77802_CLOCK_H */

Admin message