[PATCH v3 1/4] mfd: pm8xxx-spmi: add support for Qualcomm SPMI PMICs

Stanimir Varbanov
2014-07-24T12:46:26Z

From: Josh Cartwright <joshc@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: Josh Cartwright <joshc@codeaurora.org>
Signed-off-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mfd/Kconfig | 16 +++++++++++
drivers/mfd/Makefile | 1 +
drivers/mfd/pm8xxx-spmi.c | 65 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 82 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..16335a1
--- /dev/null
+++ b/drivers/mfd/pm8xxx-spmi.c
@@ -0,0 +1,65 @@
+/*
+ * 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("spmi:pm8xxx-spmi");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Josh Cartwright <joshc@codeaurora.org>");
+MODULE_AUTHOR("Stanimir Varbanov <svarbanov@mm-sol.com>");
--
1.7.0.4