mfd: Add anatop mfd driver (75060a1d) · Commits · e / devices / android_kernel_fairphone_FP3

drivers/mfd/Kconfig

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		@@ -860,6 +860,14 @@ config MFD_RC5T583
		Additional drivers must be enabled in order to use the
		different functionality of the device.

		config MFD_ANATOP
		bool "Support for Freescale i.MX on-chip ANATOP controller"
		depends on SOC_IMX6Q
		help
		Select this option to enable Freescale i.MX on-chip ANATOP
		MFD controller. This controller embeds regulator and
		thermal devices for Freescale i.MX platforms.

		endmenu
		endif

drivers/mfd/Makefile

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		@@ -114,3 +114,4 @@ obj-$(CONFIG_MFD_AAT2870_CORE) += aat2870-core.o
		obj-$(CONFIG_MFD_INTEL_MSIC) += intel_msic.o
		obj-$(CONFIG_MFD_RC5T583) += rc5t583.o rc5t583-irq.o
		obj-$(CONFIG_MFD_S5M_CORE) += s5m-core.o s5m-irq.o
		obj-$(CONFIG_MFD_ANATOP) += anatop-mfd.o

drivers/mfd/anatop-mfd.c

0 → 100644

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		/*
		* Anatop MFD driver
		*
		* Copyright (C) 2012 Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
		* Copyright (C) 2012 Linaro
		*
		* 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.
		*
		* You should have received a copy of the GNU General Public License along
		* with this program; if not, write to the Free Software Foundation, Inc.,
		* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
		* 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.
		*
		* You should have received a copy of the GNU General Public License along
		* with this program; if not, write to the Free Software Foundation, Inc.,
		* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
		*
		*/

		#include <linux/io.h>
		#include <linux/module.h>
		#include <linux/platform_device.h>
		#include <linux/of.h>
		#include <linux/of_platform.h>
		#include <linux/of_address.h>
		#include <linux/mfd/anatop.h>

		u32 anatop_get_bits(struct anatop *adata, u32 addr, int bit_shift,
		int bit_width)
		{
		u32 val, mask;

		if (bit_width == 32)
		mask = ~0;
		else
		mask = (1 << bit_width) - 1;

		val = readl(adata->ioreg + addr);
		val = (val >> bit_shift) & mask;

		return val;
		}
		EXPORT_SYMBOL_GPL(anatop_get_bits);

		void anatop_set_bits(struct anatop *adata, u32 addr, int bit_shift,
		int bit_width, u32 data)
		{
		u32 val, mask;

		if (bit_width == 32)
		mask = ~0;
		else
		mask = (1 << bit_width) - 1;

		spin_lock(&adata->reglock);
		val = readl(adata->ioreg + addr) & ~(mask << bit_shift);
		writel((data << bit_shift) \| val, adata->ioreg + addr);
		spin_unlock(&adata->reglock);
		}
		EXPORT_SYMBOL_GPL(anatop_set_bits);

		static const struct of_device_id of_anatop_match[] = {
		{ .compatible = "fsl,imx6q-anatop", },
		{ },
		};

		static int __devinit of_anatop_probe(struct platform_device *pdev)
		{
		struct device *dev = &pdev->dev;
		struct device_node *np = dev->of_node;
		void *ioreg;
		struct anatop *drvdata;

		ioreg = of_iomap(np, 0);
		if (!ioreg)
		return -EADDRNOTAVAIL;
		drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
		if (!drvdata)
		return -ENOMEM;
		drvdata->ioreg = ioreg;
		spin_lock_init(&drvdata->reglock);
		platform_set_drvdata(pdev, drvdata);
		of_platform_populate(np, of_anatop_match, NULL, dev);

		return 0;
		}

		static int __devexit of_anatop_remove(struct platform_device *pdev)
		{
		struct anatop *drvdata;
		drvdata = platform_get_drvdata(pdev);
		iounmap(drvdata->ioreg);

		return 0;
		}

		static struct platform_driver anatop_of_driver = {
		.driver = {
		.name = "anatop-mfd",
		.owner = THIS_MODULE,
		.of_match_table = of_anatop_match,
		},
		.probe = of_anatop_probe,
		.remove = of_anatop_remove,
		};

		static int __init anatop_init(void)
		{
		return platform_driver_register(&anatop_of_driver);
		}
		postcore_initcall(anatop_init);

		static void __exit anatop_exit(void)
		{
		platform_driver_unregister(&anatop_of_driver);
		}
		module_exit(anatop_exit);

		MODULE_AUTHOR("Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>");
		MODULE_DESCRIPTION("ANATOP MFD driver");
		MODULE_LICENSE("GPL v2");

include/linux/mfd/anatop.h

0 → 100644

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		/*
		* anatop.h - Anatop MFD driver
		*
		* Copyright (C) 2012 Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
		* Copyright (C) 2012 Linaro
		*
		* 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.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program; if not, write to the Free Software
		* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
		*/

		#ifndef __LINUX_MFD_ANATOP_H
		#define __LINUX_MFD_ANATOP_H

		#include <linux/spinlock.h>

		/**
		* anatop - MFD data
		* @ioreg: ioremap register
		* @reglock: spinlock for register read/write
		*/
		struct anatop {
		void *ioreg;
		spinlock_t reglock;
		};

		extern u32 anatop_get_bits(struct anatop *, u32, int, int);
		extern void anatop_set_bits(struct anatop *, u32, int, int, u32);

		#endif /* __LINUX_MFD_ANATOP_H */