[PATCH v2 1/4] mfd: pm8xxx-spmi: add support for Qualcomm SPMI PMICs

[Stanimir Varbanov]

From: Josh Cartwright <joshc at codeaurora.org>

The Qualcomm SPMI PMIC chips are components used with the
Snapdragon 800 series SoC family.  This driver exists
largely as a glue mfd component, it exists to be an owner
of an SPMI regmap for children devices described in
device tree.

Signed-off-by: Stanimir Varbanov <svarbanov at mm-sol.com>
---
 drivers/mfd/Kconfig       |   16 +++++++++++
 drivers/mfd/Makefile      |    1 +
 drivers/mfd/pm8xxx-spmi.c |   63 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 80 insertions(+), 0 deletions(-)
 create mode 100644 drivers/mfd/pm8xxx-spmi.c

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 6cc4b6a..122e2d9 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -524,6 +524,22 @@ config MFD_PM8921_CORE
 	  Say M here if you want to include support for PM8921 chip as a module.
 	  This will build a module called "pm8921-core".
 
+config MFD_PM8XXX_SPMI
+	tristate "Qualcomm PM8XXX SPMI PMICs"
+	depends on ARCH_QCOM || COMPILE_TEST
+	depends on OF
+	depends on SPMI
+	select MFD_PM8XXX
+	select REGMAP_SPMI
+	help
+	  This enables support for the Qualcomm PM8XXX SPMI PMICs.
+	  These PMICs are currently used with the Snapdragon 800 series of
+	  SoCs.  Note, that this will only be useful paired with descriptions
+	  of the independent functions as children nodes in the device tree.
+
+	  Say M here if you want to include support for the PM8XXX SPMI PMIC
+	  series as a module.  The module will be called "pm8xxx-spmi".
+
 config MFD_RDC321X
 	tristate "RDC R-321x southbridge"
 	select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 8afedba..93d82cc 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -153,6 +153,7 @@ obj-$(CONFIG_MFD_SI476X_CORE)	+= si476x-core.o
 obj-$(CONFIG_MFD_CS5535)	+= cs5535-mfd.o
 obj-$(CONFIG_MFD_OMAP_USB_HOST)	+= omap-usb-host.o omap-usb-tll.o
 obj-$(CONFIG_MFD_PM8921_CORE) 	+= pm8921-core.o ssbi.o
+obj-$(CONFIG_MFD_PM8XXX_SPMI)	+= pm8xxx-spmi.o
 obj-$(CONFIG_TPS65911_COMPARATOR)	+= tps65911-comparator.o
 obj-$(CONFIG_MFD_TPS65090)	+= tps65090.o
 obj-$(CONFIG_MFD_AAT2870_CORE)	+= aat2870-core.o
diff --git a/drivers/mfd/pm8xxx-spmi.c b/drivers/mfd/pm8xxx-spmi.c
new file mode 100644
index 0000000..882da5e
--- /dev/null
+++ b/drivers/mfd/pm8xxx-spmi.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spmi.h>
+#include <linux/regmap.h>
+#include <linux/of_platform.h>
+
+static const struct regmap_config pm8xxx_regmap_config = {
+	.reg_bits	= 16,
+	.val_bits	= 8,
+	.max_register	= 0xffff,
+};
+
+static int pm8xxx_probe(struct spmi_device *sdev)
+{
+	struct device_node *root = sdev->dev.of_node;
+	struct regmap *regmap;
+
+	regmap = devm_regmap_init_spmi_ext(sdev, &pm8xxx_regmap_config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	return of_platform_populate(root, NULL, NULL, &sdev->dev);
+}
+
+static void pm8xxx_remove(struct spmi_device *sdev)
+{
+	of_platform_depopulate(&sdev->dev);
+}
+
+static const struct of_device_id pm8xxx_id_table[] = {
+	{ .compatible = "qcom,pm8941" },
+	{ .compatible = "qcom,pm8841" },
+	{ .compatible = "qcom,pma8084" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, pm8xxx_id_table);
+
+static struct spmi_driver pm8xxx_driver = {
+	.probe = pm8xxx_probe,
+	.remove = pm8xxx_remove,
+	.driver = {
+		.name = "pm8xxx-spmi",
+		.of_match_table = pm8xxx_id_table,
+	},
+};
+module_spmi_driver(pm8xxx_driver);
+
+MODULE_DESCRIPTION("PM8XXX SPMI PMIC driver");
+MODULE_ALIAS("platform:" KBUILD_MODNAME);
+MODULE_AUTHOR("The Linux Foundation");
+MODULE_LICENSE("GPL v2");
-- 
1.7.0.4