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-rw-r--r--drivers/mfd/lp87565.c131
1 files changed, 131 insertions, 0 deletions
diff --git a/drivers/mfd/lp87565.c b/drivers/mfd/lp87565.c
new file mode 100644
index 000000000..a52ab76fe
--- /dev/null
+++ b/drivers/mfd/lp87565.c
@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/
+ *
+ * Author: Keerthy <j-keerthy@ti.com>
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+
+#include <linux/mfd/lp87565.h>
+
+static const struct regmap_config lp87565_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = LP87565_REG_MAX,
+};
+
+static const struct mfd_cell lp87565_cells[] = {
+ { .name = "lp87565-q1-regulator", },
+ { .name = "lp87565-q1-gpio", },
+};
+
+static const struct of_device_id of_lp87565_match_table[] = {
+ { .compatible = "ti,lp87565", },
+ {
+ .compatible = "ti,lp87524-q1",
+ .data = (void *)LP87565_DEVICE_TYPE_LP87524_Q1,
+ },
+ {
+ .compatible = "ti,lp87565-q1",
+ .data = (void *)LP87565_DEVICE_TYPE_LP87565_Q1,
+ },
+ {
+ .compatible = "ti,lp87561-q1",
+ .data = (void *)LP87565_DEVICE_TYPE_LP87561_Q1,
+ },
+ {}
+};
+MODULE_DEVICE_TABLE(of, of_lp87565_match_table);
+
+static int lp87565_probe(struct i2c_client *client,
+ const struct i2c_device_id *ids)
+{
+ struct lp87565 *lp87565;
+ const struct of_device_id *of_id;
+ int ret;
+ unsigned int otpid;
+
+ lp87565 = devm_kzalloc(&client->dev, sizeof(*lp87565), GFP_KERNEL);
+ if (!lp87565)
+ return -ENOMEM;
+
+ lp87565->dev = &client->dev;
+
+ lp87565->regmap = devm_regmap_init_i2c(client, &lp87565_regmap_config);
+ if (IS_ERR(lp87565->regmap)) {
+ ret = PTR_ERR(lp87565->regmap);
+ dev_err(lp87565->dev,
+ "Failed to initialize register map: %d\n", ret);
+ return ret;
+ }
+
+ lp87565->reset_gpio = devm_gpiod_get_optional(lp87565->dev, "reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(lp87565->reset_gpio)) {
+ ret = PTR_ERR(lp87565->reset_gpio);
+ if (ret == -EPROBE_DEFER)
+ return ret;
+ }
+
+ if (lp87565->reset_gpio) {
+ gpiod_set_value_cansleep(lp87565->reset_gpio, 1);
+ /* The minimum assertion time is undocumented, just guess */
+ usleep_range(2000, 4000);
+
+ gpiod_set_value_cansleep(lp87565->reset_gpio, 0);
+ /* Min 1.2 ms before first I2C transaction */
+ usleep_range(1500, 3000);
+ }
+
+ ret = regmap_read(lp87565->regmap, LP87565_REG_OTP_REV, &otpid);
+ if (ret) {
+ dev_err(lp87565->dev, "Failed to read OTP ID\n");
+ return ret;
+ }
+
+ lp87565->rev = otpid & LP87565_OTP_REV_OTP_ID;
+
+ of_id = of_match_device(of_lp87565_match_table, &client->dev);
+ if (of_id)
+ lp87565->dev_type = (enum lp87565_device_type)of_id->data;
+
+ i2c_set_clientdata(client, lp87565);
+
+ return devm_mfd_add_devices(lp87565->dev, PLATFORM_DEVID_AUTO,
+ lp87565_cells, ARRAY_SIZE(lp87565_cells),
+ NULL, 0, NULL);
+}
+
+static void lp87565_shutdown(struct i2c_client *client)
+{
+ struct lp87565 *lp87565 = i2c_get_clientdata(client);
+
+ gpiod_set_value_cansleep(lp87565->reset_gpio, 1);
+}
+
+static const struct i2c_device_id lp87565_id_table[] = {
+ { "lp87565-q1", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, lp87565_id_table);
+
+static struct i2c_driver lp87565_driver = {
+ .driver = {
+ .name = "lp87565",
+ .of_match_table = of_lp87565_match_table,
+ },
+ .probe = lp87565_probe,
+ .shutdown = lp87565_shutdown,
+ .id_table = lp87565_id_table,
+};
+module_i2c_driver(lp87565_driver);
+
+MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
+MODULE_DESCRIPTION("lp87565 chip family Multi-Function Device driver");
+MODULE_LICENSE("GPL v2");