Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 192 insertions, 0 deletions

diff --git a/drivers/regulator/raa215300.c b/drivers/regulator/raa215300.c
new file mode 100644
index 0000000000..6982565c8a
--- /dev/null
+++ b/drivers/regulator/raa215300.c
@@ -0,0 +1,192 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Renesas RAA215300 PMIC driver
+//
+// Copyright (C) 2023 Renesas Electronics Corporation
+//
+
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#define RAA215300_FAULT_LATCHED_STATUS_1	0x59
+#define RAA215300_FAULT_LATCHED_STATUS_2	0x5a
+#define RAA215300_FAULT_LATCHED_STATUS_3	0x5b
+#define RAA215300_FAULT_LATCHED_STATUS_4	0x5c
+#define RAA215300_FAULT_LATCHED_STATUS_6	0x5e
+
+#define RAA215300_INT_MASK_1	0x64
+#define RAA215300_INT_MASK_2	0x65
+#define RAA215300_INT_MASK_3	0x66
+#define RAA215300_INT_MASK_4	0x67
+#define RAA215300_INT_MASK_6	0x68
+
+#define RAA215300_REG_BLOCK_EN	0x6c
+#define RAA215300_HW_REV	0xf8
+
+#define RAA215300_INT_MASK_1_ALL	GENMASK(5, 0)
+#define RAA215300_INT_MASK_2_ALL	GENMASK(3, 0)
+#define RAA215300_INT_MASK_3_ALL	GENMASK(5, 0)
+#define RAA215300_INT_MASK_4_ALL	BIT(0)
+#define RAA215300_INT_MASK_6_ALL	GENMASK(7, 0)
+
+#define RAA215300_REG_BLOCK_EN_RTC_EN	BIT(6)
+#define RAA215300_RTC_DEFAULT_ADDR	0x6f
+
+static const struct regmap_config raa215300_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 0xff,
+};
+
+static void raa215300_rtc_unregister_device(void *data)
+{
+	i2c_unregister_device(data);
+}
+
+static int raa215300_clk_present(struct i2c_client *client, const char *name)
+{
+	struct clk *clk;
+
+	clk = devm_clk_get_optional(&client->dev, name);
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	return !!clk;
+}
+
+static int raa215300_i2c_probe(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	const char *clkin_name = "clkin";
+	unsigned int pmic_version, val;
+	const char *xin_name = "xin";
+	const char *clk_name = NULL;
+	struct regmap *regmap;
+	int ret;
+
+	regmap = devm_regmap_init_i2c(client, &raa215300_regmap_config);
+	if (IS_ERR(regmap))
+		return dev_err_probe(dev, PTR_ERR(regmap),
+				     "regmap i2c init failed\n");
+
+	ret = regmap_read(regmap, RAA215300_HW_REV, &pmic_version);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "HW rev read failed\n");
+
+	dev_dbg(dev, "RAA215300 PMIC version 0x%04x\n", pmic_version);
+
+	/* Clear all blocks except RTC, if enabled */
+	regmap_read(regmap, RAA215300_REG_BLOCK_EN, &val);
+	val &= RAA215300_REG_BLOCK_EN_RTC_EN;
+	regmap_write(regmap, RAA215300_REG_BLOCK_EN, val);
+
+	/* Clear the latched registers */
+	regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_1, &val);
+	regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_1, val);
+	regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_2, &val);
+	regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_2, val);
+	regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_3, &val);
+	regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_3, val);
+	regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_4, &val);
+	regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_4, val);
+	regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_6, &val);
+	regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_6, val);
+
+	/* Mask all the PMIC interrupts */
+	regmap_write(regmap, RAA215300_INT_MASK_1, RAA215300_INT_MASK_1_ALL);
+	regmap_write(regmap, RAA215300_INT_MASK_2, RAA215300_INT_MASK_2_ALL);
+	regmap_write(regmap, RAA215300_INT_MASK_3, RAA215300_INT_MASK_3_ALL);
+	regmap_write(regmap, RAA215300_INT_MASK_4, RAA215300_INT_MASK_4_ALL);
+	regmap_write(regmap, RAA215300_INT_MASK_6, RAA215300_INT_MASK_6_ALL);
+
+	ret = raa215300_clk_present(client, xin_name);
+	if (ret < 0) {
+		return ret;
+	} else if (ret) {
+		clk_name = xin_name;
+	} else {
+		ret = raa215300_clk_present(client, clkin_name);
+		if (ret < 0)
+			return ret;
+		if (ret)
+			clk_name = clkin_name;
+	}
+
+	if (clk_name) {
+		const char *name = pmic_version >= 0x12 ? "isl1208" : "raa215300_a0";
+		struct device_node *np = client->dev.of_node;
+		u32 addr = RAA215300_RTC_DEFAULT_ADDR;
+		struct i2c_board_info info = {};
+		struct i2c_client *rtc_client;
+		struct clk_hw *hw;
+		ssize_t size;
+
+		hw = devm_clk_hw_register_fixed_rate(dev, clk_name, NULL, 0, 32768);
+		if (IS_ERR(hw))
+			return PTR_ERR(hw);
+
+		ret = devm_clk_hw_register_clkdev(dev, hw, clk_name, NULL);
+		if (ret)
+			return dev_err_probe(dev, ret, "Failed to initialize clkdev\n");
+
+		if (np) {
+			int i;
+
+			i = of_property_match_string(np, "reg-names", "rtc");
+			if (i >= 0)
+				of_property_read_u32_index(np, "reg", i, &addr);
+		}
+
+		info.addr = addr;
+		if (client->irq > 0)
+			info.irq = client->irq;
+
+		size = strscpy(info.type, name, sizeof(info.type));
+		if (size < 0)
+			return dev_err_probe(dev, size,
+					     "Invalid device name: %s\n", name);
+
+		/* Enable RTC block */
+		regmap_update_bits(regmap, RAA215300_REG_BLOCK_EN,
+				   RAA215300_REG_BLOCK_EN_RTC_EN,
+				   RAA215300_REG_BLOCK_EN_RTC_EN);
+
+		rtc_client = i2c_new_client_device(client->adapter, &info);
+		if (IS_ERR(rtc_client))
+			return PTR_ERR(rtc_client);
+
+		ret = devm_add_action_or_reset(dev,
+					       raa215300_rtc_unregister_device,
+					       rtc_client);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static const struct of_device_id raa215300_dt_match[] = {
+	{ .compatible = "renesas,raa215300" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, raa215300_dt_match);
+
+static struct i2c_driver raa215300_i2c_driver = {
+	.driver = {
+		.name = "raa215300",
+		.of_match_table = raa215300_dt_match,
+	},
+	.probe = raa215300_i2c_probe,
+};
+module_i2c_driver(raa215300_i2c_driver);
+
+MODULE_DESCRIPTION("Renesas RAA215300 PMIC driver");
+MODULE_AUTHOR("Fabrizio Castro <fabrizio.castro.jz@renesas.com>");
+MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com>");
+MODULE_LICENSE("GPL");