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authorRajmohan Mani <rajmohan.mani@intel.com>2017-07-28 17:30:24 -0700
committerLee Jones <lee.jones@linaro.org>2017-09-05 08:46:01 +0100
commit9bbf6a15ce19dd947b7fa6ad4095931ab3682da8 (patch)
treef480aa4e18c1802e8616db26fc419bf74a2f87bf /drivers/mfd
parentd9018976cdb6eefc62a7ba79a405f6c9661b08a7 (diff)
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mfd: Add support for TPS68470 device
The TPS68470 device is an advanced power management unit that powers a Compact Camera Module (CCM), generates clocks for image sensors, drives a dual LED for Flash and incorporates two LED drivers for general purpose indicators. This patch adds support for TPS68470 mfd device. Signed-off-by: Rajmohan Mani <rajmohan.mani@intel.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/Kconfig18
-rw-r--r--drivers/mfd/Makefile1
-rw-r--r--drivers/mfd/tps68470.c106
3 files changed, 125 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 79e4ec6f19a8..4f57725a02ea 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1352,6 +1352,24 @@ config MFD_TPS65217
This driver can also be built as a module. If so, the module
will be called tps65217.
+config MFD_TPS68470
+ bool "TI TPS68470 Power Management / LED chips"
+ depends on ACPI && I2C=y
+ select MFD_CORE
+ select REGMAP_I2C
+ select I2C_DESIGNWARE_PLATFORM
+ help
+ If you say yes here you get support for the TPS68470 series of
+ Power Management / LED chips.
+
+ These include voltage regulators, LEDs and other features
+ that are often used in portable devices.
+
+ This option is a bool as it provides an ACPI operation
+ region, which must be available before any of the devices
+ using this are probed. This option also configures the
+ designware-i2c driver to be built-in, for the same reason.
+
config MFD_TI_LP873X
tristate "TI LP873X Power Management IC"
depends on I2C
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 21e19a5f3f3c..c3d0a1b39bb6 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -84,6 +84,7 @@ obj-$(CONFIG_MFD_TPS65910) += tps65910.o
obj-$(CONFIG_MFD_TPS65912) += tps65912-core.o
obj-$(CONFIG_MFD_TPS65912_I2C) += tps65912-i2c.o
obj-$(CONFIG_MFD_TPS65912_SPI) += tps65912-spi.o
+obj-$(CONFIG_MFD_TPS68470) += tps68470.o
obj-$(CONFIG_MFD_TPS80031) += tps80031.o
obj-$(CONFIG_MENELAUS) += menelaus.o
diff --git a/drivers/mfd/tps68470.c b/drivers/mfd/tps68470.c
new file mode 100644
index 000000000000..189efaea054c
--- /dev/null
+++ b/drivers/mfd/tps68470.c
@@ -0,0 +1,106 @@
+/*
+ * TPS68470 chip Parent driver
+ *
+ * Copyright (C) 2017 Intel Corporation
+ *
+ * Authors:
+ * Rajmohan Mani <rajmohan.mani@intel.com>
+ * Tianshu Qiu <tian.shu.qiu@intel.com>
+ * Jian Xu Zheng <jian.xu.zheng@intel.com>
+ * Yuning Pu <yuning.pu@intel.com>
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps68470.h>
+#include <linux/regmap.h>
+
+static const struct mfd_cell tps68470s[] = {
+ { .name = "tps68470-gpio" },
+ { .name = "tps68470_pmic_opregion" },
+};
+
+static const struct regmap_config tps68470_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = TPS68470_REG_MAX,
+};
+
+static int tps68470_chip_init(struct device *dev, struct regmap *regmap)
+{
+ unsigned int version;
+ int ret;
+
+ /* Force software reset */
+ ret = regmap_write(regmap, TPS68470_REG_RESET, TPS68470_REG_RESET_MASK);
+ if (ret)
+ return ret;
+
+ ret = regmap_read(regmap, TPS68470_REG_REVID, &version);
+ if (ret) {
+ dev_err(dev, "Failed to read revision register: %d\n", ret);
+ return ret;
+ }
+
+ dev_info(dev, "TPS68470 REVID: 0x%x\n", version);
+
+ return 0;
+}
+
+static int tps68470_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct regmap *regmap;
+ int ret;
+
+ regmap = devm_regmap_init_i2c(client, &tps68470_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(dev, "devm_regmap_init_i2c Error %ld\n",
+ PTR_ERR(regmap));
+ return PTR_ERR(regmap);
+ }
+
+ i2c_set_clientdata(client, regmap);
+
+ ret = tps68470_chip_init(dev, regmap);
+ if (ret < 0) {
+ dev_err(dev, "TPS68470 Init Error %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, tps68470s,
+ ARRAY_SIZE(tps68470s), NULL, 0, NULL);
+ if (ret < 0) {
+ dev_err(dev, "devm_mfd_add_devices failed: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct acpi_device_id tps68470_acpi_ids[] = {
+ {"INT3472"},
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, tps68470_acpi_ids);
+
+static struct i2c_driver tps68470_driver = {
+ .driver = {
+ .name = "tps68470",
+ .acpi_match_table = tps68470_acpi_ids,
+ },
+ .probe_new = tps68470_probe,
+};
+builtin_i2c_driver(tps68470_driver);