clk: Add driver for Maxim 77802 PMIC clocks (83ccf16c) · Commits · e / devices / android_kernel_teracube_2e

drivers/clk/Kconfig

+7 −0

Original line number	Original line	Diff line number	Diff line
	@@ -42,6 +42,13 @@ config COMMON_CLK_MAX77686
	---help---		---help---
	This driver supports Maxim 77686 crystal oscillator clock.		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		config COMMON_CLK_SI5351
	tristate "Clock driver for SiLabs 5351A/B/C"		tristate "Clock driver for SiLabs 5351A/B/C"
	depends on I2C		depends on I2C

drivers/clk/Makefile

+1 −0

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

drivers/clk/clk-max77802.c

0 → 100644

+98 −0

Original line number	Original line	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	Original line	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 */