mfd: Add support for Qualcomm SPMI PMICs

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>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 609b7a2144d6f77316ec58bd9fbe1f26dca1e689..1456ea70bbc7c5286af3190792e954a3610d85cd 100644 (file)
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -567,6 +567,21 @@ 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_SPMI_PMIC
+       tristate "Qualcomm SPMI PMICs"
+       depends on ARCH_QCOM || COMPILE_TEST
+       depends on OF
+       depends on SPMI
+       select REGMAP_SPMI
+       help
+         This enables support for the Qualcomm 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 SPMI PMIC
+         series as a module.  The module will be called "qcom-spmi-pmic".
+
 config MFD_RDC321X
        tristate "RDC R-321x southbridge"
        select MFD_CORE

diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 1d11a247abbba44aefb450148f751b4a250111fd..8bd54b1253af5f6fd836146173daec0ce11ceafe 100644 (file)
--- 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-$(CONFIG_MFD_SPMI_PMIC)    += qcom-spmi-pmic.o
 obj-$(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/qcom-spmi-pmic.c b/drivers/mfd/qcom-spmi-pmic.c
new file mode 100644 (file)
index 0000000..4b8beb2
--- /dev/null
+++ b/drivers/mfd/qcom-spmi-pmic.c
@@ -0,0 +1,67 @@
+/*
+ * 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 spmi_regmap_config = {
+       .reg_bits       = 16,
+       .val_bits       = 8,
+       .max_register   = 0xffff,
+       .fast_io        = true,
+};
+
+static int pmic_spmi_probe(struct spmi_device *sdev)
+{
+       struct device_node *root = sdev->dev.of_node;
+       struct regmap *regmap;
+
+       regmap = devm_regmap_init_spmi_ext(sdev, &spmi_regmap_config);
+       if (IS_ERR(regmap))
+               return PTR_ERR(regmap);
+
+       return of_platform_populate(root, NULL, NULL, &sdev->dev);
+}
+
+static void pmic_spmi_remove(struct spmi_device *sdev)
+{
+       of_platform_depopulate(&sdev->dev);
+}
+
+static const struct of_device_id pmic_spmi_id_table[] = {
+       { .compatible = "qcom,spmi-pmic" },
+       { .compatible = "qcom,pm8941" },
+       { .compatible = "qcom,pm8841" },
+       { .compatible = "qcom,pma8084" },
+       { }
+};
+MODULE_DEVICE_TABLE(of, pmic_spmi_id_table);
+
+static struct spmi_driver pmic_spmi_driver = {
+       .probe = pmic_spmi_probe,
+       .remove = pmic_spmi_remove,
+       .driver = {
+               .name = "pmic-spmi",
+               .of_match_table = pmic_spmi_id_table,
+       },
+};
+module_spmi_driver(pmic_spmi_driver);
+
+MODULE_DESCRIPTION("Qualcomm SPMI PMIC driver");
+MODULE_ALIAS("spmi:spmi-pmic");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Josh Cartwright <joshc@codeaurora.org>");
+MODULE_AUTHOR("Stanimir Varbanov <svarbanov@mm-sol.com>");