[PATCH v3 08/10] mfd: pm8x41: add support for Qualcomm 8x41 PMICs

Josh Cartwright
2013-10-28T19:14:17Z

The Qualcomm 8941 and 8841 PMICs 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>
---
drivers/mfd/Kconfig | 10 ++++++++
drivers/mfd/Makefile | 1 +
drivers/mfd/pm8x41.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 75 insertions(+)
create mode 100644 drivers/mfd/pm8x41.c

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 914c3d1..0a288cb 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -476,6 +476,16 @@ config MFD_PM8XXX_IRQ
This is required to use certain other PM 8xxx features, such as GPIO
and MPP.

+config MFD_PM8X41
+ bool "Qualcomm PM8X41 PMIC"
+ depends on ARCH_MSM
+ select REGMAP_SPMI
+ help
+ This enables basic support for the Qualcomm 8941 and 8841 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.
+
config MFD_RDC321X
tristate "RDC R-321x southbridge"
select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 15b905c..ee4d338 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -149,6 +149,7 @@ 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_IRQ) += pm8xxx-irq.o
+obj-$(CONFIG_MFD_PM8X41) += pm8x41.o
obj-$(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/pm8x41.c b/drivers/mfd/pm8x41.c
new file mode 100644
index 0000000..0a57221
--- /dev/null
+++ b/drivers/mfd/pm8x41.c
@@ -0,0 +1,64 @@
+/* Copyright (c) 2013, 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 pm8x41_regmap_config = {
+ .reg_bits = 16,
+ .val_bits = 8,
+ .max_register = 0xFFFF,
+};
+
+static int pm8x41_remove_child(struct device *dev, void *unused)
+{
+ platform_device_unregister(to_platform_device(dev));
+ return 0;
+}
+
+static int pm8x41_remove(struct spmi_device *sdev)
+{
+ device_for_each_child(&sdev->dev, NULL, pm8x41_remove_child);
+ return 0;
+}
+
+static int pm8x41_probe(struct spmi_device *sdev)
+{
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_spmi(sdev, &pm8x41_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_dbg(&sdev->dev, "regmap creation failed.\n");
+ return PTR_ERR(regmap);
+ }
+
+ return of_platform_populate(sdev->dev.of_node, NULL, NULL, &sdev->dev);
+}
+
+static struct of_device_id pm8x41_id_table[] = {
+ { "qcom,pm8841", },
+ { "qcom,pm8941", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, pm8x41_id_table);
+
+static struct spmi_driver pm8x41_driver = {
+ .probe = pm8x41_probe,
+ .remove = pm8x41_remove,
+ .driver = {
+ .name = "qpnp,pm8x41",
+ .of_match_table = pm8x41_id_table,
+ },
+};
+module_spmi_driver(pm8x41_driver);