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 <wens@xxxxxxxx>
---
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 <wens@xxxxxxxx>
+ *
+ * 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 <wens@xxxxxxxx>");
+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 <carlo@xxxxxxxxxx>
+ *
+ * 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
--
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