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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
commit76cb841cb886eef6b3bee341a2266c76578724ad (patch)
treef5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /drivers/mfd/tps68470.c
parentInitial commit. (diff)
downloadlinux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz
linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/mfd/tps68470.c')
-rw-r--r--drivers/mfd/tps68470.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/drivers/mfd/tps68470.c b/drivers/mfd/tps68470.c
new file mode 100644
index 000000000..a5981a79b
--- /dev/null
+++ b/drivers/mfd/tps68470.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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>
+ */
+
+#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);