regmap: ac97: Add generic AC'97 callbacks (22853223) · Commits · 戴 / test

drivers/base/regmap/Kconfig

+4 −1

Original line number	Diff line number	Diff line
		@@ -3,12 +3,15 @@
		# subsystems should select the appropriate symbols.

		config REGMAP
		default y if (REGMAP_I2C \|\| REGMAP_SPI \|\| REGMAP_SPMI \|\| REGMAP_MMIO \|\| REGMAP_IRQ)
		default y if (REGMAP_I2C \|\| REGMAP_SPI \|\| REGMAP_SPMI \|\| REGMAP_AC97 \|\| REGMAP_MMIO \|\| REGMAP_IRQ)
		select LZO_COMPRESS
		select LZO_DECOMPRESS
		select IRQ_DOMAIN if REGMAP_IRQ
		bool

		config REGMAP_AC97
		tristate

		config REGMAP_I2C
		tristate
		depends on I2C

drivers/base/regmap/Makefile

+1 −0

Original line number	Diff line number	Diff line
		obj-$(CONFIG_REGMAP) += regmap.o regcache.o
		obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-lzo.o regcache-flat.o
		obj-$(CONFIG_DEBUG_FS) += regmap-debugfs.o
		obj-$(CONFIG_REGMAP_AC97) += regmap-ac97.o
		obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o
		obj-$(CONFIG_REGMAP_SPI) += regmap-spi.o
		obj-$(CONFIG_REGMAP_SPMI) += regmap-spmi.o

drivers/base/regmap/regmap-ac97.c

0 → 100644

+114 −0

Original line number	Diff line number	Diff line
		/*
		* Register map access API - AC'97 support
		*
		* Copyright 2013 Linaro Ltd. All rights reserved.
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms and conditions of the GNU General Public License,
		* version 2, as published by the Free Software Foundation.
		*
		* This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
		*/

		#include <linux/clk.h>
		#include <linux/err.h>
		#include <linux/init.h>
		#include <linux/io.h>
		#include <linux/module.h>
		#include <linux/regmap.h>
		#include <linux/slab.h>

		#include <sound/ac97_codec.h>

		bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg)
		{
		switch (reg) {
		case AC97_RESET:
		case AC97_POWERDOWN:
		case AC97_INT_PAGING:
		case AC97_EXTENDED_ID:
		case AC97_EXTENDED_STATUS:
		case AC97_EXTENDED_MID:
		case AC97_EXTENDED_MSTATUS:
		case AC97_GPIO_STATUS:
		case AC97_MISC_AFE:
		case AC97_VENDOR_ID1:
		case AC97_VENDOR_ID2:
		case AC97_CODEC_CLASS_REV:
		case AC97_PCI_SVID:
		case AC97_PCI_SID:
		case AC97_FUNC_SELECT:
		case AC97_FUNC_INFO:
		case AC97_SENSE_INFO:
		return true;
		default:
		return false;
		}
		}
		EXPORT_SYMBOL_GPL(regmap_ac97_default_volatile);

		static int regmap_ac97_reg_read(void *context, unsigned int reg,
		unsigned int *val)
		{
		struct snd_ac97 *ac97 = context;

		*val = ac97->bus->ops->read(ac97, reg);

		return 0;
		}

		static int regmap_ac97_reg_write(void *context, unsigned int reg,
		unsigned int val)
		{
		struct snd_ac97 *ac97 = context;

		ac97->bus->ops->write(ac97, reg, val);

		return 0;
		}

		static const struct regmap_bus ac97_regmap_bus = {
		.reg_write = regmap_ac97_reg_write,
		.reg_read = regmap_ac97_reg_read,
		};

		/**
		* regmap_init_ac97(): Initialise AC'97 register map
		*
		* @ac97: Device that will be interacted with
		* @config: Configuration for register map
		*
		* The return value will be an ERR_PTR() on error or a valid pointer to
		* a struct regmap.
		*/
		struct regmap regmap_init_ac97(struct snd_ac97 ac97,
		const struct regmap_config *config)
		{
		return regmap_init(&ac97->dev, &ac97_regmap_bus, ac97, config);
		}
		EXPORT_SYMBOL_GPL(regmap_init_ac97);

		/**
		* devm_regmap_init_ac97(): Initialise AC'97 register map
		*
		* @ac97: Device that will be interacted with
		* @config: Configuration for register map
		*
		* The return value will be an ERR_PTR() on error or a valid pointer
		* to a struct regmap. The regmap will be automatically freed by the
		* device management code.
		*/
		struct regmap devm_regmap_init_ac97(struct snd_ac97 ac97,
		const struct regmap_config *config)
		{
		return devm_regmap_init(&ac97->dev, &ac97_regmap_bus, ac97, config);
		}
		EXPORT_SYMBOL_GPL(devm_regmap_init_ac97);

		MODULE_LICENSE("GPL v2");

include/linux/regmap.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -27,6 +27,7 @@ struct spmi_device;
		struct regmap;
		struct regmap_range_cfg;
		struct regmap_field;
		struct snd_ac97;

		/* An enum of all the supported cache types */
		enum regcache_type {
		@@ -340,6 +341,8 @@ struct regmap regmap_init_spmi_ext(struct spmi_device dev,
		struct regmap regmap_init_mmio_clk(struct device dev, const char *clk_id,
		void __iomem *regs,
		const struct regmap_config *config);
		struct regmap regmap_init_ac97(struct snd_ac97 ac97,
		const struct regmap_config *config);

		struct regmap devm_regmap_init(struct device dev,
		const struct regmap_bus *bus,
		@@ -356,6 +359,10 @@ struct regmap devm_regmap_init_spmi_ext(struct spmi_device dev,
		struct regmap devm_regmap_init_mmio_clk(struct device dev, const char *clk_id,
		void __iomem *regs,
		const struct regmap_config *config);
		struct regmap devm_regmap_init_ac97(struct snd_ac97 ac97,
		const struct regmap_config *config);

		bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg);

		/**
		* regmap_init_mmio(): Initialise register map

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