The AC100 is a multifunction device with an audio codec subsystem and an RTC subsystem. These two subsystems share a common register space and host interface.
Signed-off-by: Chen-Yu Tsai <[email protected]> --- drivers/mfd/Kconfig | 10 ++++ drivers/mfd/Makefile | 2 + drivers/mfd/ac100.c | 116 ++++++++++++++++++++++++++++++++++++++++++++++ include/linux/mfd/ac100.h | 62 +++++++++++++++++++++++++ 4 files changed, 190 insertions(+) create mode 100644 drivers/mfd/ac100.c create mode 100644 include/linux/mfd/ac100.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 1bcf601de5bc..bd83849a0c8d 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -101,6 +101,16 @@ config MFD_BCM590XX help Support for the BCM590xx PMUs from Broadcom +config MFD_AC100 + tristate "X-Powers AC100" + select MFD_CORE + depends on SUNXI_RSB + help + If you say Y here you get support for the X-Powers AC100 audio codec + IC. + This driver include only the core APIs. You have to select individual + components like codecs or RTC under the corresponding menus. + config MFD_AXP20X tristate select MFD_CORE diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 42a66e19e191..60f9a6b0557c 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -113,6 +113,8 @@ obj-$(CONFIG_PMIC_DA9052) += da9052-irq.o obj-$(CONFIG_PMIC_DA9052) += da9052-core.o obj-$(CONFIG_MFD_DA9052_SPI) += da9052-spi.o obj-$(CONFIG_MFD_DA9052_I2C) += da9052-i2c.o + +obj-$(CONFIG_MFD_AC100) += ac100.o obj-$(CONFIG_MFD_AXP20X) += axp20x.o obj-$(CONFIG_MFD_AXP20X_I2C) += axp20x-i2c.o obj-$(CONFIG_MFD_AXP20X_RSB) += axp20x-rsb.o diff --git a/drivers/mfd/ac100.c b/drivers/mfd/ac100.c new file mode 100644 index 000000000000..3e6752e9dc07 --- /dev/null +++ b/drivers/mfd/ac100.c @@ -0,0 +1,116 @@ +/* + * ac100.c - MFD core driver for X-Powers' AC100 Audio Codec IC + * + * The AC100 is a highly integrated audio codec and RTC subsystem designed + * for mobile applications. It has 3 I2S/PCM interfaces, a 2 channel DAC, + * a 2 channel ADC with 5 inputs and a builtin mixer. The RTC subsystem has + * 3 clock outputs. + * + * The audio codec and RTC parts are completely separate, sharing only the + * host interface for access to its registers. + * + * Author: Chen-Yu Tsai <[email protected]> + * + * 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. + */ + +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mfd/core.h> +#include <linux/mfd/ac100.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/regmap.h> +#include <linux/sunxi-rsb.h> + +static const struct regmap_range ac100_writeable_ranges[] = { + regmap_reg_range(AC100_CLK32K_ANALOG_CTRL, AC100_CLK32K_OUT_CTRL3), + regmap_reg_range(AC100_RTC_RST, AC100_RTC_UPD), + regmap_reg_range(AC100_ALM_INT_ENA, AC100_ALM_INT_STA), + regmap_reg_range(AC100_ALM_SEC, AC100_RTC_GP(15)), +}; + +static const struct regmap_range ac100_volatile_ranges[] = { + regmap_reg_range(AC100_RTC_RST, AC100_RTC_RST), + regmap_reg_range(AC100_RTC_SEC, AC100_ALM_INT_STA), + regmap_reg_range(AC100_ALM_SEC, AC100_ALM_UPD), +}; + +static const struct regmap_access_table ac100_writeable_table = { + .yes_ranges = ac100_writeable_ranges, + .n_yes_ranges = ARRAY_SIZE(ac100_writeable_ranges), +}; + +static const struct regmap_access_table ac100_volatile_table = { + .yes_ranges = ac100_volatile_ranges, + .n_yes_ranges = ARRAY_SIZE(ac100_volatile_ranges), +}; + +static const struct regmap_config ac100_regmap_config = { + .reg_bits = 8, + .val_bits = 16, + .wr_table = &ac100_writeable_table, + .volatile_table = &ac100_volatile_table, + .max_register = AC100_RTC_GP(15), + .cache_type = REGCACHE_RBTREE, +}; + +static struct mfd_cell ac100_cells[] = { + { + .name = "ac100-codec", + .of_compatible = "x-powers,ac100-codec", + }, { + .name = "ac100-rtc", + .of_compatible = "x-powers,ac100-rtc", + }, +}; + +static int ac100_rsb_probe(struct sunxi_rsb_device *rdev) +{ + struct ac100_dev *ac100; + int ret; + + ac100 = devm_kzalloc(&rdev->dev, sizeof(*ac100), GFP_KERNEL); + if (!ac100) + return -ENOMEM; + + ac100->dev = &rdev->dev; + sunxi_rsb_device_set_drvdata(rdev, ac100); + + ac100->regmap = devm_regmap_init_sunxi_rsb(rdev, &ac100_regmap_config); + if (IS_ERR(ac100->regmap)) { + ret = PTR_ERR(ac100->regmap); + dev_err(ac100->dev, "regmap init failed: %d\n", ret); + return ret; + } + + ret = devm_mfd_add_devices(ac100->dev, PLATFORM_DEVID_NONE, ac100_cells, + ARRAY_SIZE(ac100_cells), NULL, 0, NULL); + if (ret) { + dev_err(ac100->dev, "failed to add MFD devices: %d\n", ret); + return ret; + } + + return 0; +} + +static const struct of_device_id ac100_of_match[] = { + { .compatible = "x-powers,ac100" }, + { }, +}; +MODULE_DEVICE_TABLE(of, ac100_of_match); + +static struct sunxi_rsb_driver ac100_rsb_driver = { + .driver = { + .name = "ac100", + .of_match_table = of_match_ptr(ac100_of_match), + }, + .probe = ac100_rsb_probe, +}; +module_sunxi_rsb_driver(ac100_rsb_driver); + +MODULE_DESCRIPTION("Audio codec MFD core driver for AC100"); +MODULE_AUTHOR("Chen-Yu Tsai <[email protected]>"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/ac100.h b/include/linux/mfd/ac100.h new file mode 100644 index 000000000000..6d3b9f5c5aa2 --- /dev/null +++ b/include/linux/mfd/ac100.h @@ -0,0 +1,62 @@ +/* + * Functions and registers to access AC100 codec / RTC combo IC. + * + * Copyright (C) 2013, Carlo Caione <[email protected]> + * + * 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. + */ + +#ifndef __LINUX_MFD_AC100_H +#define __LINUX_MFD_AC100_H + +#include <linux/regmap.h> + +struct ac100_dev { + struct device *dev; + struct regmap *regmap; +}; + +/* Audio codec related registers */ +#define AC100_AUDIO_CHIP_RST 0x00 +#define AC100_PLL_CTRL1 0x01 +#define AC100_PLL_CTRL2 0x02 +#define AC100_SYSCLK_CTRL 0x03 +#define AC100_MOD_CLK_ENA 0x04 +#define AC100_MOD_RST_CTRL 0x05 + +/* RTC */ +#define AC100_CLK32K_ANALOG_CTRL 0xc0 +#define AC100_CLK32K_OUT_CTRL1 0xc1 +#define AC100_CLK32K_OUT_CTRL2 0xc2 +#define AC100_CLK32K_OUT_CTRL3 0xc3 + +/* RTC module */ +#define AC100_RTC_RST 0xc6 +#define AC100_RTC_CTRL 0xc7 +#define AC100_RTC_SEC 0xc8 /* second */ +#define AC100_RTC_MIN 0xc9 /* minute */ +#define AC100_RTC_HOU 0xca /* hour */ +#define AC100_RTC_WEE 0xcb /* weekday */ +#define AC100_RTC_DAY 0xcc /* day */ +#define AC100_RTC_MON 0xcd /* month */ +#define AC100_RTC_YEA 0xce /* year */ +#define AC100_RTC_UPD 0xcf /* update trigger */ + +/* RTC Alarm */ +#define AC100_ALM_INT_ENA 0xd0 +#define AC100_ALM_INT_STA 0xd1 +#define AC100_ALM_SEC 0xd8 +#define AC100_ALM_MIN 0xd9 +#define AC100_ALM_HOU 0xda +#define AC100_ALM_WEE 0xdb +#define AC100_ALM_DAY 0xdc +#define AC100_ALM_MON 0xdd +#define AC100_ALM_YEA 0xde +#define AC100_ALM_UPD 0xdf + +/* RTC general purpose register 0 ~ 15 */ +#define AC100_RTC_GP(x) (0xe0 + (x)) + +#endif /* __LINUX_MFD_AC100_H */ -- 2.8.1
