[PATCH v7 07/10] mfd: axp20x: Add support for RSB based AXP223 PMIC

Chen-Yu Tsai
2016-01-13T03:30:51Z

The AXP223 is a new PMIC commonly paired with Allwinner A23/A33 SoCs.
It is functionally identical to AXP221; only the regulator default
voltage/status and the external host interface are different.

Signed-off-by: Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>
---

Changes since v6:

- Drop filename from file header
- Use generic dev_set_drvdata()
- Properly sort #include statements
- Add copyright notice

---
drivers/mfd/Kconfig | 11 +++++++
drivers/mfd/Makefile | 1 +
drivers/mfd/axp20x-rsb.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++
drivers/mfd/axp20x.c | 2 ++
include/linux/mfd/axp20x.h | 1 +
5 files changed, 95 insertions(+)
create mode 100644 drivers/mfd/axp20x-rsb.c

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 804cd3dcce32..13c565103e96 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -107,6 +107,17 @@ config MFD_AXP20X_I2C
components like regulators or the PEK (Power Enable Key) under the
corresponding menus.

+config MFD_AXP20X_RSB
+ tristate "X-Powers AXP series PMICs with RSB"
+ select MFD_AXP20X
+ depends on SUNXI_RSB
+ help
+ If you say Y here you get support for the X-Powers AXP series power
+ management ICs (PMICs) controlled with RSB.
+ This driver include only the core APIs. You have to select individual
+ components like regulators or the PEK (Power Enable Key) under the
+ corresponding menus.
+
config MFD_CROS_EC
tristate "ChromeOS Embedded Controller"
select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index a6913007d667..caea6637d5e8 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -108,6 +108,7 @@ obj-$(CONFIG_MFD_DA9052_SPI) += da9052-spi.o
obj-$(CONFIG_MFD_DA9052_I2C) += da9052-i2c.o
obj-$(CONFIG_MFD_AXP20X) += axp20x.o
obj-$(CONFIG_MFD_AXP20X_I2C) += axp20x-i2c.o
+obj-$(CONFIG_MFD_AXP20X_RSB) += axp20x-rsb.o

obj-$(CONFIG_MFD_LP3943) += lp3943.o
obj-$(CONFIG_MFD_LP8788) += lp8788.o lp8788-irq.o
diff --git a/drivers/mfd/axp20x-rsb.c b/drivers/mfd/axp20x-rsb.c
new file mode 100644
index 000000000000..28c20247c112
--- /dev/null
+++ b/drivers/mfd/axp20x-rsb.c
@@ -0,0 +1,80 @@
+/*
+ * RSB driver for the X-Powers' Power Management ICs
+ *
+ * AXP20x typically comprises an adaptive USB-Compatible PWM charger, BUCK DC-DC
+ * converters, LDOs, multiple 12-bit ADCs of voltage, current and temperature
+ * as well as configurable GPIOs.
+ *
+ * This driver supports the RSB variants.
+ *
+ * Copyright (C) 2015 Chen-Yu Tsai
+ *
+ * Author: Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>
+ *
+ * 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/acpi.h>
+#include <linux/err.h>
+#include <linux/mfd/axp20x.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/sunxi-rsb.h>
+
+static int axp20x_rsb_probe(struct sunxi_rsb_device *rdev)
+{
+ struct axp20x_dev *axp20x;
+ int ret;
+
+ axp20x = devm_kzalloc(&rdev->dev, sizeof(*axp20x), GFP_KERNEL);
+ if (!axp20x)
+ return -ENOMEM;
+
+ axp20x->dev = &rdev->dev;
+ axp20x->irq = rdev->irq;
+ dev_set_drvdata(&rdev->dev, axp20x);
+
+ ret = axp20x_match_device(axp20x);
+ if (ret)
+ return ret;
+
+ axp20x->regmap = devm_regmap_init_sunxi_rsb(rdev, axp20x->regmap_cfg);
+ if (IS_ERR(axp20x->regmap)) {
+ ret = PTR_ERR(axp20x->regmap);
+ dev_err(&rdev->dev, "regmap init failed: %d\n", ret);
+ return ret;
+ }
+
+ return axp20x_device_probe(axp20x);
+}
+
+static int axp20x_rsb_remove(struct sunxi_rsb_device *rdev)
+{
+ struct axp20x_dev *axp20x = sunxi_rsb_device_get_drvdata(rdev);
+
+ return axp20x_device_remove(axp20x);
+}
+
+static const struct of_device_id axp20x_rsb_of_match[] = {
+ { .compatible = "x-powers,axp223", .data = (void *)AXP223_ID },
+ { },
+};
+MODULE_DEVICE_TABLE(of, axp20x_rsb_of_match);
+
+static struct sunxi_rsb_driver axp20x_rsb_driver = {
+ .driver = {
+ .name = "axp20x-rsb",
+ .of_match_table = of_match_ptr(axp20x_rsb_of_match),
+ },
+ .probe = axp20x_rsb_probe,
+ .remove = axp20x_rsb_remove,
+};
+module_sunxi_rsb_driver(axp20x_rsb_driver);
+
+MODULE_DESCRIPTION("PMIC MFD sunXi RSB driver for AXP20X");
+MODULE_AUTHOR("Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mfd/axp20x.c b/drivers/mfd/axp20x.c
index 3054ea4b95e8..a57d6e940610 100644
--- a/drivers/mfd/axp20x.c
+++ b/drivers/mfd/axp20x.c
@@ -35,6 +35,7 @@ static const char * const axp20x_model_names[] = {
"AXP202",
"AXP209",
"AXP221",
+ "AXP223",
"AXP288",
};

@@ -618,6 +619,7 @@ int axp20x_match_device(struct axp20x_dev *axp20x)
axp20x->regmap_irq_chip = &axp20x_regmap_irq_chip;
break;
case AXP221_ID:
+ case AXP223_ID:
axp20x->nr_cells = ARRAY_SIZE(axp22x_cells);
axp20x->cells = axp22x_cells;
axp20x->regmap_cfg = &axp22x_regmap_config;
diff --git a/include/linux/mfd/axp20x.h b/include/linux/mfd/axp20x.h
index 00697c6ad8b0..d82e7d51372b 100644
--- a/include/linux/mfd/axp20x.h
+++ b/include/linux/mfd/axp20x.h
@@ -18,6 +18,7 @@ enum {
AXP202_ID,
AXP209_ID,
AXP221_ID,
+ AXP223_ID,
AXP288_ID,
NR_AXP20X_VARIANTS,
};
--
2.6.4