Adding upstream version 6.1.76.upstream/6.1.76

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

1 files changed, 201 insertions, 0 deletions

diff --git a/drivers/mfd/rsmu_i2c.c b/drivers/mfd/rsmu_i2c.c
new file mode 100644
index 000000000..f716ab803
--- /dev/null
+++ b/drivers/mfd/rsmu_i2c.c
@@ -0,0 +1,201 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * I2C driver for Renesas Synchronization Management Unit (SMU) devices.
+ *
+ * Copyright (C) 2021 Integrated Device Technology, Inc., a Renesas Company.
+ */
+
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/rsmu.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#include "rsmu.h"
+
+/*
+ * 16-bit register address: the lower 8 bits of the register address come
+ * from the offset addr byte and the upper 8 bits come from the page register.
+ */
+#define	RSMU_CM_PAGE_ADDR		0xFD
+#define	RSMU_CM_PAGE_WINDOW		256
+
+/*
+ * 15-bit register address: the lower 7 bits of the register address come
+ * from the offset addr byte and the upper 8 bits come from the page register.
+ */
+#define	RSMU_SABRE_PAGE_ADDR		0x7F
+#define	RSMU_SABRE_PAGE_WINDOW		128
+
+static const struct regmap_range_cfg rsmu_cm_range_cfg[] = {
+	{
+		.range_min = 0,
+		.range_max = 0xD000,
+		.selector_reg = RSMU_CM_PAGE_ADDR,
+		.selector_mask = 0xFF,
+		.selector_shift = 0,
+		.window_start = 0,
+		.window_len = RSMU_CM_PAGE_WINDOW,
+	}
+};
+
+static const struct regmap_range_cfg rsmu_sabre_range_cfg[] = {
+	{
+		.range_min = 0,
+		.range_max = 0x400,
+		.selector_reg = RSMU_SABRE_PAGE_ADDR,
+		.selector_mask = 0xFF,
+		.selector_shift = 0,
+		.window_start = 0,
+		.window_len = RSMU_SABRE_PAGE_WINDOW,
+	}
+};
+
+static bool rsmu_cm_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case RSMU_CM_PAGE_ADDR:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static bool rsmu_sabre_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case RSMU_SABRE_PAGE_ADDR:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static const struct regmap_config rsmu_cm_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 0xD000,
+	.ranges = rsmu_cm_range_cfg,
+	.num_ranges = ARRAY_SIZE(rsmu_cm_range_cfg),
+	.volatile_reg = rsmu_cm_volatile_reg,
+	.cache_type = REGCACHE_RBTREE,
+	.can_multi_write = true,
+};
+
+static const struct regmap_config rsmu_sabre_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 0x400,
+	.ranges = rsmu_sabre_range_cfg,
+	.num_ranges = ARRAY_SIZE(rsmu_sabre_range_cfg),
+	.volatile_reg = rsmu_sabre_volatile_reg,
+	.cache_type = REGCACHE_RBTREE,
+	.can_multi_write = true,
+};
+
+static const struct regmap_config rsmu_sl_regmap_config = {
+	.reg_bits = 16,
+	.val_bits = 8,
+	.reg_format_endian = REGMAP_ENDIAN_BIG,
+	.max_register = 0x339,
+	.cache_type = REGCACHE_NONE,
+	.can_multi_write = true,
+};
+
+static int rsmu_i2c_probe(struct i2c_client *client,
+			  const struct i2c_device_id *id)
+{
+	const struct regmap_config *cfg;
+	struct rsmu_ddata *rsmu;
+	int ret;
+
+	rsmu = devm_kzalloc(&client->dev, sizeof(*rsmu), GFP_KERNEL);
+	if (!rsmu)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, rsmu);
+
+	rsmu->dev = &client->dev;
+	rsmu->type = (enum rsmu_type)id->driver_data;
+
+	switch (rsmu->type) {
+	case RSMU_CM:
+		cfg = &rsmu_cm_regmap_config;
+		break;
+	case RSMU_SABRE:
+		cfg = &rsmu_sabre_regmap_config;
+		break;
+	case RSMU_SL:
+		cfg = &rsmu_sl_regmap_config;
+		break;
+	default:
+		dev_err(rsmu->dev, "Unsupported RSMU device type: %d\n", rsmu->type);
+		return -ENODEV;
+	}
+	rsmu->regmap = devm_regmap_init_i2c(client, cfg);
+	if (IS_ERR(rsmu->regmap)) {
+		ret = PTR_ERR(rsmu->regmap);
+		dev_err(rsmu->dev, "Failed to allocate register map: %d\n", ret);
+		return ret;
+	}
+
+	return rsmu_core_init(rsmu);
+}
+
+static void rsmu_i2c_remove(struct i2c_client *client)
+{
+	struct rsmu_ddata *rsmu = i2c_get_clientdata(client);
+
+	rsmu_core_exit(rsmu);
+}
+
+static const struct i2c_device_id rsmu_i2c_id[] = {
+	{ "8a34000",  RSMU_CM },
+	{ "8a34001",  RSMU_CM },
+	{ "82p33810", RSMU_SABRE },
+	{ "82p33811", RSMU_SABRE },
+	{ "8v19n850", RSMU_SL },
+	{ "8v19n851", RSMU_SL },
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, rsmu_i2c_id);
+
+static const struct of_device_id rsmu_i2c_of_match[] = {
+	{ .compatible = "idt,8a34000",  .data = (void *)RSMU_CM },
+	{ .compatible = "idt,8a34001",  .data = (void *)RSMU_CM },
+	{ .compatible = "idt,82p33810", .data = (void *)RSMU_SABRE },
+	{ .compatible = "idt,82p33811", .data = (void *)RSMU_SABRE },
+	{ .compatible = "idt,8v19n850", .data = (void *)RSMU_SL },
+	{ .compatible = "idt,8v19n851", .data = (void *)RSMU_SL },
+	{}
+};
+MODULE_DEVICE_TABLE(of, rsmu_i2c_of_match);
+
+static struct i2c_driver rsmu_i2c_driver = {
+	.driver = {
+		.name = "rsmu-i2c",
+		.of_match_table = of_match_ptr(rsmu_i2c_of_match),
+	},
+	.probe = rsmu_i2c_probe,
+	.remove	= rsmu_i2c_remove,
+	.id_table = rsmu_i2c_id,
+};
+
+static int __init rsmu_i2c_init(void)
+{
+	return i2c_add_driver(&rsmu_i2c_driver);
+}
+subsys_initcall(rsmu_i2c_init);
+
+static void __exit rsmu_i2c_exit(void)
+{
+	i2c_del_driver(&rsmu_i2c_driver);
+}
+module_exit(rsmu_i2c_exit);
+
+MODULE_DESCRIPTION("Renesas SMU I2C driver");
+MODULE_LICENSE("GPL");