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authorMatt Porter <mporter@linaro.org>2014-03-11 19:33:54 -0400
committerLee Jones <lee.jones@linaro.org>2014-03-19 08:59:59 +0000
commit037b60f2ca9403d02cbee60ad0a10f3806f9dc4b (patch)
tree4f2e42a0adf1595269b6d70a2c43d3c3f374f84d /drivers/mfd
parentc6215037ac5594ef375e07e33572d85aeb0f5e3e (diff)
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mfd: Add bcm590xx pmu driver
Add a driver for the BCM590xx PMU multi-function devices. The driver initially supports regmap initialization and instantiation of the voltage regulator device function of the PMU. Signed-off-by: Matt Porter <mporter@linaro.org> Reviewed-by: Tim Kryger <tim.kryger@linaro.org> Reviewed-by: Markus Mayer <markus.mayer@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/Kconfig8
-rw-r--r--drivers/mfd/Makefile1
-rw-r--r--drivers/mfd/bcm590xx.c93
3 files changed, 102 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index d22ca0fc873f..7587c9e1a519 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -59,6 +59,14 @@ config MFD_AAT2870_CORE
additional drivers must be enabled in order to use the
functionality of the device.
+config MFD_BCM590XX
+ tristate "Broadcom BCM590xx PMUs"
+ select MFD_CORE
+ select REGMAP_I2C
+ depends on I2C
+ help
+ Support for the BCM590xx PMUs from Broadcom
+
config MFD_CROS_EC
tristate "ChromeOS Embedded Controller"
select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 89a7951503ca..23835dfa615c 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_MFD_88PM800) += 88pm800.o 88pm80x.o
obj-$(CONFIG_MFD_88PM805) += 88pm805.o 88pm80x.o
obj-$(CONFIG_MFD_SM501) += sm501.o
obj-$(CONFIG_MFD_ASIC3) += asic3.o tmio_core.o
+obj-$(CONFIG_MFD_BCM590XX) += bcm590xx.o
obj-$(CONFIG_MFD_CROS_EC) += cros_ec.o
obj-$(CONFIG_MFD_CROS_EC_I2C) += cros_ec_i2c.o
obj-$(CONFIG_MFD_CROS_EC_SPI) += cros_ec_spi.o
diff --git a/drivers/mfd/bcm590xx.c b/drivers/mfd/bcm590xx.c
new file mode 100644
index 000000000000..926a57e4d533
--- /dev/null
+++ b/drivers/mfd/bcm590xx.c
@@ -0,0 +1,93 @@
+/*
+ * Broadcom BCM590xx PMU
+ *
+ * Copyright 2014 Linaro Limited
+ * Author: Matt Porter <mporter@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/mfd/bcm590xx.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+static const struct mfd_cell bcm590xx_devs[] = {
+ {
+ .name = "bcm590xx-vregs",
+ },
+};
+
+static const struct regmap_config bcm590xx_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = BCM590XX_MAX_REGISTER,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static int bcm590xx_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct bcm590xx *bcm590xx;
+ int ret;
+
+ bcm590xx = devm_kzalloc(&i2c->dev, sizeof(*bcm590xx), GFP_KERNEL);
+ if (!bcm590xx)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, bcm590xx);
+ bcm590xx->dev = &i2c->dev;
+ bcm590xx->i2c_client = i2c;
+
+ bcm590xx->regmap = devm_regmap_init_i2c(i2c, &bcm590xx_regmap_config);
+ if (IS_ERR(bcm590xx->regmap)) {
+ ret = PTR_ERR(bcm590xx->regmap);
+ dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = mfd_add_devices(&i2c->dev, -1, bcm590xx_devs,
+ ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL);
+ if (ret < 0)
+ dev_err(&i2c->dev, "failed to add sub-devices: %d\n", ret);
+
+ return ret;
+}
+
+static const struct of_device_id bcm590xx_of_match[] = {
+ { .compatible = "brcm,bcm59056" },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, bcm590xx_of_match);
+
+static const struct i2c_device_id bcm590xx_i2c_id[] = {
+ { "bcm59056" },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, bcm590xx_i2c_id);
+
+static struct i2c_driver bcm590xx_i2c_driver = {
+ .driver = {
+ .name = "bcm590xx",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(bcm590xx_of_match),
+ },
+ .probe = bcm590xx_i2c_probe,
+ .id_table = bcm590xx_i2c_id,
+};
+module_i2c_driver(bcm590xx_i2c_driver);
+
+MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
+MODULE_DESCRIPTION("BCM590xx multi-function driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:bcm590xx");