Merge tag 'i2c-for-6.18-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull more i2c updates from Wolfram Sang:

- Second part of rtl9300 updates since dependencies are in now:
- general cleanups
- implement block read/write support
- add RTL9310 support

- DT schema conversion of hix5hd2 binding

- namespace cleanup for i2c-algo-pca

- minor simplification for mt65xx

* tag 'i2c-for-6.18-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
dt-bindings: i2c: hisilicon,hix5hd2: convert to DT schema
i2c: mt65xx: convert set_speed function to void
i2c: rename wait_for_completion callback to wait_for_completion_cb
i2c: rtl9300: add support for RTL9310 I2C controller
dt-bindings: i2c: realtek,rtl9301-i2c: extend for RTL9310 support
i2c: rtl9300: use scoped guard instead of explicit lock/unlock
i2c: rtl9300: separate xfer configuration and execution
i2c: rtl9300: do not set read mode on every transfer
i2c: rtl9300: move setting SCL frequency to config_io
i2c: rtl9300: rename internal sda_pin to sda_num
dt-bindings: i2c: realtek,rtl9301-i2c: fix wording and typos
i2c: rtl9300: use regmap fields and API for registers
i2c: rtl9300: Implement I2C block read and write

Documentation/devicetree/bindings/i2c/hisilicon,hix5hd2-i2c.yaml

···
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/hisilicon,hix5hd2-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+title: I2C for HiSilicon hix5hd2 chipset platform
+
+maintainers:
+  - Wei Yan <[e-mail]>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - hisilicon,hix5hd2-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-frequency:
+    description: Desired I2C bus frequency in Hz
+    default: 100000
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/hix5hd2-clock.h>
+
+    i2c@f8b10000 {
+        compatible = "hisilicon,hix5hd2-i2c";
+        reg = <0xf8b10000 0x1000>;
+        interrupts = <0 38 4>;
+        clocks = <&clock HIX5HD2_I2C0_RST>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+    };

Documentation/devicetree/bindings/i2c/i2c-hix5hd2.txt

···
-I2C for Hisilicon hix5hd2 chipset platform
-
-Required properties:
-- compatible: Must be "hisilicon,hix5hd2-i2c"
-- reg: physical base address of the controller and length of memory mapped
-     region.
-- interrupts: interrupt number to the cpu.
-- #address-cells = <1>;
-- #size-cells = <0>;
-- clocks: phandles to input clocks.
-
-Optional properties:
-- clock-frequency: Desired I2C bus frequency in Hz, otherwise defaults to 100000
-- Child nodes conforming to i2c bus binding
-
-Examples:
-I2C0@f8b10000 {
-	compatible = "hisilicon,hix5hd2-i2c";
-	reg = <0xf8b10000 0x1000>;
-	interrupts = <0 38 4>;
-	clocks = <&clock HIX5HD2_I2C0_RST>;
-	#address-cells = <1>;
-	#size-cells = <0>;
-}

Documentation/devicetree/bindings/i2c/realtek,rtl9301-i2c.yaml

···
   - Chris Packham <[e-mail]>
 
 description:
-  The RTL9300 SoC has two I2C controllers. Each of these has an SCL line (which
+  RTL9300 SoCs have two I2C controllers. Each of these has an SCL line (which
   if not-used for SCL can be a GPIO). There are 8 common SDA lines that can be
   assigned to either I2C controller.
+  RTL9310 SoCs have equal capabilities but support 12 common SDA lines which
+  can be assigned to either I2C controller.
 
 properties:
   compatible:
···
               - realtek,rtl9302c-i2c
               - realtek,rtl9303-i2c
           - const: realtek,rtl9301-i2c
-      - const: realtek,rtl9301-i2c
+      - items:
+          - enum:
+              - realtek,rtl9311-i2c
+              - realtek,rtl9312-i2c
+              - realtek,rtl9313-i2c
+          - const: realtek,rtl9310-i2c
+      - enum:
+          - realtek,rtl9301-i2c
+          - realtek,rtl9310-i2c
 
   reg:
     items:
-      - description: Register offset and size this I2C controller.
+      - description: Register offset and size of this I2C controller.
 
   "#address-cells":
     const: 1
···
   "#size-cells":
     const: 0
 
+  realtek,scl:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      The SCL line number of this I2C controller.
+    enum: [ 0, 1 ]
+
 patternProperties:
-  '^i2c@[0-7]$':
+  '^i2c@[0-9ab]$':
     $ref: /schemas/i2c/i2c-controller.yaml
     unevaluatedProperties: false
 
     properties:
       reg:
-        description: The SDA pin associated with the I2C bus.
+        description: The SDA line number associated with the I2C bus.
         maxItems: 1
 
     required:
       - reg
+
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: realtek,rtl9310-i2c
+    then:
+      required:
+        - realtek,scl
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: realtek,rtl9301-i2c
+    then:
+      patternProperties:
+        '^i2c@[89ab]$': false
 
 required:
   - compatible

drivers/i2c/algos/i2c-algo-pca.c

···
 #define pca_clock(adap) adap->i2c_clock
 #define pca_set_con(adap, val) pca_outw(adap, I2C_PCA_CON, val)
 #define pca_get_con(adap) pca_inw(adap, I2C_PCA_CON)
-#define pca_wait(adap) adap->wait_for_completion(adap->data)
+#define pca_wait(adap) adap->wait_for_completion_cb(adap->data)
 
 static void pca_reset(struct i2c_algo_pca_data *adap)
 {

drivers/i2c/busses/i2c-mt65xx.c

···
 	return 0;
 }
 
-static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
+static void mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
 {
 	unsigned int clk_src;
 	unsigned int step_cnt;
···
 
 		break;
 	}
-
-
-	return 0;
 }
 
 static void i2c_dump_register(struct mtk_i2c *i2c)
···
 
 	strscpy(i2c->adap.name, I2C_DRV_NAME, sizeof(i2c->adap.name));
 
-	ret = mtk_i2c_set_speed(i2c, clk_get_rate(i2c->clocks[speed_clk].clk));
-	if (ret) {
-		dev_err(&pdev->dev, "Failed to set the speed.\n");
-		return -EINVAL;
-	}
+	mtk_i2c_set_speed(i2c, clk_get_rate(i2c->clocks[speed_clk].clk));
 
 	if (i2c->dev_comp->max_dma_support > 32) {
 		ret = dma_set_mask(&pdev->dev,

drivers/i2c/busses/i2c-pca-isa.c

···
 	/* .data intentionally left NULL, not needed with ISA */
 	.write_byte		= pca_isa_writebyte,
 	.read_byte		= pca_isa_readbyte,
-	.wait_for_completion	= pca_isa_waitforcompletion,
+	.wait_for_completion_cb	= pca_isa_waitforcompletion,
 	.reset_chip		= pca_isa_resetchip,
 };
 

drivers/i2c/busses/i2c-pca-platform.c

···
 	}
 
 	i2c->algo_data.data = i2c;
-	i2c->algo_data.wait_for_completion = i2c_pca_pf_waitforcompletion;
+	i2c->algo_data.wait_for_completion_cb = i2c_pca_pf_waitforcompletion;
 	if (i2c->gpio)
 		i2c->algo_data.reset_chip = i2c_pca_pf_resetchip;
 	else

drivers/i2c/busses/i2c-rtl9300.c

···
 #include <linux/mutex.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
+#include <linux/unaligned.h>
 
 enum rtl9300_bus_freq {
 	RTL9300_I2C_STD_FREQ,
···
 	struct i2c_adapter adap;
 	struct rtl9300_i2c *i2c;
 	enum rtl9300_bus_freq bus_freq;
-	u8 sda_pin;
+	u8 sda_num;
+};
+
+enum rtl9300_i2c_reg_scope {
+	REG_SCOPE_GLOBAL,
+	REG_SCOPE_MASTER,
+};
+
+struct rtl9300_i2c_reg_field {
+	struct reg_field field;
+	enum rtl9300_i2c_reg_scope scope;
+};
+
+enum rtl9300_i2c_reg_fields {
+	F_DATA_WIDTH = 0,
+	F_DEV_ADDR,
+	F_I2C_FAIL,
+	F_I2C_TRIG,
+	F_MEM_ADDR,
+	F_MEM_ADDR_WIDTH,
+	F_RD_MODE,
+	F_RWOP,
+	F_SCL_FREQ,
+	F_SCL_SEL,
+	F_SDA_OUT_SEL,
+	F_SDA_SEL,
+
+	/* keep last */
+	F_NUM_FIELDS
+};
+
+struct rtl9300_i2c_drv_data {
+	struct rtl9300_i2c_reg_field field_desc[F_NUM_FIELDS];
+	int (*select_scl)(struct rtl9300_i2c *i2c, u8 scl);
+	u32 data_reg;
+	u8 max_nchan;
 };
 
 #define RTL9300_I2C_MUX_NCHAN	8
+#define RTL9310_I2C_MUX_NCHAN	12
 
 struct rtl9300_i2c {
 	struct regmap *regmap;
 	struct device *dev;
-	struct rtl9300_i2c_chan chans[RTL9300_I2C_MUX_NCHAN];
+	struct rtl9300_i2c_chan chans[RTL9310_I2C_MUX_NCHAN];
+	struct regmap_field *fields[F_NUM_FIELDS];
 	u32 reg_base;
-	u8 sda_pin;
+	u32 data_reg;
+	u8 scl_num;
+	u8 sda_num;
 	struct mutex lock;
 };
 
+DEFINE_GUARD(rtl9300_i2c, struct rtl9300_i2c *, mutex_lock(&_T->lock), mutex_unlock(&_T->lock))
+
+enum rtl9300_i2c_xfer_type {
+	RTL9300_I2C_XFER_BYTE,
+	RTL9300_I2C_XFER_WORD,
+	RTL9300_I2C_XFER_BLOCK,
+};
+
+struct rtl9300_i2c_xfer {
+	enum rtl9300_i2c_xfer_type type;
+	u16 dev_addr;
+	u8 reg_addr;
+	u8 reg_addr_len;
+	u8 *data;
+	u8 data_len;
+	bool write;
+};
+
 #define RTL9300_I2C_MST_CTRL1				0x0
-#define  RTL9300_I2C_MST_CTRL1_MEM_ADDR_OFS		8
-#define  RTL9300_I2C_MST_CTRL1_MEM_ADDR_MASK		GENMASK(31, 8)
-#define  RTL9300_I2C_MST_CTRL1_SDA_OUT_SEL_OFS		4
-#define  RTL9300_I2C_MST_CTRL1_SDA_OUT_SEL_MASK		GENMASK(6, 4)
-#define  RTL9300_I2C_MST_CTRL1_GPIO_SCL_SEL		BIT(3)
-#define  RTL9300_I2C_MST_CTRL1_RWOP			BIT(2)
-#define  RTL9300_I2C_MST_CTRL1_I2C_FAIL			BIT(1)
-#define  RTL9300_I2C_MST_CTRL1_I2C_TRIG			BIT(0)
 #define RTL9300_I2C_MST_CTRL2				0x4
-#define  RTL9300_I2C_MST_CTRL2_RD_MODE			BIT(15)
-#define  RTL9300_I2C_MST_CTRL2_DEV_ADDR_OFS		8
-#define  RTL9300_I2C_MST_CTRL2_DEV_ADDR_MASK		GENMASK(14, 8)
-#define  RTL9300_I2C_MST_CTRL2_DATA_WIDTH_OFS		4
-#define  RTL9300_I2C_MST_CTRL2_DATA_WIDTH_MASK		GENMASK(7, 4)
-#define  RTL9300_I2C_MST_CTRL2_MEM_ADDR_WIDTH_OFS	2
-#define  RTL9300_I2C_MST_CTRL2_MEM_ADDR_WIDTH_MASK	GENMASK(3, 2)
-#define  RTL9300_I2C_MST_CTRL2_SCL_FREQ_OFS		0
-#define  RTL9300_I2C_MST_CTRL2_SCL_FREQ_MASK		GENMASK(1, 0)
 #define RTL9300_I2C_MST_DATA_WORD0			0x8
 #define RTL9300_I2C_MST_DATA_WORD1			0xc
 #define RTL9300_I2C_MST_DATA_WORD2			0x10
 #define RTL9300_I2C_MST_DATA_WORD3			0x14
-
 #define RTL9300_I2C_MST_GLB_CTRL			0x384
+
+#define RTL9310_I2C_MST_IF_CTRL				0x1004
+#define RTL9310_I2C_MST_IF_SEL				0x1008
+#define RTL9310_I2C_MST_CTRL				0x0
+#define RTL9310_I2C_MST_MEMADDR_CTRL			0x4
+#define RTL9310_I2C_MST_DATA_CTRL			0x8
 
 static int rtl9300_i2c_reg_addr_set(struct rtl9300_i2c *i2c, u32 reg, u16 len)
 {
-	u32 val, mask;
 	int ret;
 
-	val = len << RTL9300_I2C_MST_CTRL2_MEM_ADDR_WIDTH_OFS;
-	mask = RTL9300_I2C_MST_CTRL2_MEM_ADDR_WIDTH_MASK;
-
-	ret = regmap_update_bits(i2c->regmap, i2c->reg_base + RTL9300_I2C_MST_CTRL2, mask, val);
+	ret = regmap_field_write(i2c->fields[F_MEM_ADDR_WIDTH], len);
 	if (ret)
 		return ret;
 
-	val = reg << RTL9300_I2C_MST_CTRL1_MEM_ADDR_OFS;
-	mask = RTL9300_I2C_MST_CTRL1_MEM_ADDR_MASK;
-
-	return regmap_update_bits(i2c->regmap, i2c->reg_base + RTL9300_I2C_MST_CTRL1, mask, val);
+	return regmap_field_write(i2c->fields[F_MEM_ADDR], reg);
 }
 
-static int rtl9300_i2c_config_io(struct rtl9300_i2c *i2c, u8 sda_pin)
+static int rtl9300_i2c_select_scl(struct rtl9300_i2c *i2c, u8 scl)
 {
-	int ret;
-	u32 val, mask;
+	return regmap_field_write(i2c->fields[F_SCL_SEL], 1);
+}
 
-	ret = regmap_update_bits(i2c->regmap, RTL9300_I2C_MST_GLB_CTRL, BIT(sda_pin), BIT(sda_pin));
+static int rtl9310_i2c_select_scl(struct rtl9300_i2c *i2c, u8 scl)
+{
+	return regmap_field_update_bits(i2c->fields[F_SCL_SEL], BIT(scl), BIT(scl));
+}
+
+static int rtl9300_i2c_config_chan(struct rtl9300_i2c *i2c, struct rtl9300_i2c_chan *chan)
+{
+	struct rtl9300_i2c_drv_data *drv_data;
+	int ret;
+
+	if (i2c->sda_num == chan->sda_num)
+		return 0;
+
+	ret = regmap_field_write(i2c->fields[F_SCL_FREQ], chan->bus_freq);
 	if (ret)
 		return ret;
 
-	val = (sda_pin << RTL9300_I2C_MST_CTRL1_SDA_OUT_SEL_OFS) |
-		RTL9300_I2C_MST_CTRL1_GPIO_SCL_SEL;
-	mask = RTL9300_I2C_MST_CTRL1_SDA_OUT_SEL_MASK | RTL9300_I2C_MST_CTRL1_GPIO_SCL_SEL;
+	drv_data = (struct rtl9300_i2c_drv_data *)device_get_match_data(i2c->dev);
+	ret = drv_data->select_scl(i2c, i2c->scl_num);
+	if (ret)
+		return ret;
 
-	return regmap_update_bits(i2c->regmap, i2c->reg_base + RTL9300_I2C_MST_CTRL1, mask, val);
+	ret = regmap_field_update_bits(i2c->fields[F_SDA_SEL], BIT(chan->sda_num),
+				       BIT(chan->sda_num));
+	if (ret)
+		return ret;
+
+	ret = regmap_field_write(i2c->fields[F_SDA_OUT_SEL], chan->sda_num);
+	if (ret)
+		return ret;
+
+	i2c->sda_num = chan->sda_num;
+	return 0;
 }
 
-static int rtl9300_i2c_config_xfer(struct rtl9300_i2c *i2c, struct rtl9300_i2c_chan *chan,
-				   u16 addr, u16 len)
-{
-	u32 val, mask;
-
-	if (len < 1 || len > 16)
-		return -EINVAL;
-
-	val = chan->bus_freq << RTL9300_I2C_MST_CTRL2_SCL_FREQ_OFS;
-	mask = RTL9300_I2C_MST_CTRL2_SCL_FREQ_MASK;
-
-	val |= addr << RTL9300_I2C_MST_CTRL2_DEV_ADDR_OFS;
-	mask |= RTL9300_I2C_MST_CTRL2_DEV_ADDR_MASK;
-
-	val |= ((len - 1) & 0xf) << RTL9300_I2C_MST_CTRL2_DATA_WIDTH_OFS;
-	mask |= RTL9300_I2C_MST_CTRL2_DATA_WIDTH_MASK;
-
-	mask |= RTL9300_I2C_MST_CTRL2_RD_MODE;
-
-	return regmap_update_bits(i2c->regmap, i2c->reg_base + RTL9300_I2C_MST_CTRL2, mask, val);
-}
-
-static int rtl9300_i2c_read(struct rtl9300_i2c *i2c, u8 *buf, int len)
+static int rtl9300_i2c_read(struct rtl9300_i2c *i2c, u8 *buf, u8 len)
 {
 	u32 vals[4] = {};
 	int i, ret;
···
 	if (len > 16)
 		return -EIO;
 
-	ret = regmap_bulk_read(i2c->regmap, i2c->reg_base + RTL9300_I2C_MST_DATA_WORD0,
-			       vals, ARRAY_SIZE(vals));
+	ret = regmap_bulk_read(i2c->regmap, i2c->data_reg, vals, ARRAY_SIZE(vals));
 	if (ret)
 		return ret;
 
···
 	return 0;
 }
 
-static int rtl9300_i2c_write(struct rtl9300_i2c *i2c, u8 *buf, int len)
+static int rtl9300_i2c_write(struct rtl9300_i2c *i2c, u8 *buf, u8 len)
 {
 	u32 vals[4] = {};
 	int i;
···
 		vals[reg] |= buf[i] << shift;
 	}
 
-	return regmap_bulk_write(i2c->regmap, i2c->reg_base + RTL9300_I2C_MST_DATA_WORD0,
-				vals, ARRAY_SIZE(vals));
+	return regmap_bulk_write(i2c->regmap, i2c->data_reg, vals, ARRAY_SIZE(vals));
 }
 
 static int rtl9300_i2c_writel(struct rtl9300_i2c *i2c, u32 data)
 {
-	return regmap_write(i2c->regmap, i2c->reg_base + RTL9300_I2C_MST_DATA_WORD0, data);
+	return regmap_write(i2c->regmap, i2c->data_reg, data);
 }
 
-static int rtl9300_i2c_execute_xfer(struct rtl9300_i2c *i2c, char read_write,
-				    int size, union i2c_smbus_data *data, int len)
+static int rtl9300_i2c_prepare_xfer(struct rtl9300_i2c *i2c, struct rtl9300_i2c_xfer *xfer)
 {
-	u32 val, mask;
 	int ret;
 
-	val = read_write == I2C_SMBUS_WRITE ? RTL9300_I2C_MST_CTRL1_RWOP : 0;
-	mask = RTL9300_I2C_MST_CTRL1_RWOP;
+	if (xfer->data_len < 1 || xfer->data_len > 16)
+		return -EINVAL;
 
-	val |= RTL9300_I2C_MST_CTRL1_I2C_TRIG;
-	mask |= RTL9300_I2C_MST_CTRL1_I2C_TRIG;
-
-	ret = regmap_update_bits(i2c->regmap, i2c->reg_base + RTL9300_I2C_MST_CTRL1, mask, val);
+	ret = regmap_field_write(i2c->fields[F_DEV_ADDR], xfer->dev_addr);
 	if (ret)
 		return ret;
 
-	ret = regmap_read_poll_timeout(i2c->regmap, i2c->reg_base + RTL9300_I2C_MST_CTRL1,
-				       val, !(val & RTL9300_I2C_MST_CTRL1_I2C_TRIG), 100, 100000);
+	ret = rtl9300_i2c_reg_addr_set(i2c, xfer->reg_addr, xfer->reg_addr_len);
 	if (ret)
 		return ret;
 
-	if (val & RTL9300_I2C_MST_CTRL1_I2C_FAIL)
+	ret = regmap_field_write(i2c->fields[F_RWOP], xfer->write);
+	if (ret)
+		return ret;
+
+	ret = regmap_field_write(i2c->fields[F_DATA_WIDTH], (xfer->data_len - 1) & 0xf);
+	if (ret)
+		return ret;
+
+	if (xfer->write) {
+		switch (xfer->type) {
+		case RTL9300_I2C_XFER_BYTE:
+			ret = rtl9300_i2c_writel(i2c, *xfer->data);
+			break;
+		case RTL9300_I2C_XFER_WORD:
+			ret = rtl9300_i2c_writel(i2c, get_unaligned((const u16 *)xfer->data));
+			break;
+		default:
+			ret = rtl9300_i2c_write(i2c, xfer->data, xfer->data_len);
+			break;
+		}
+	}
+
+	return ret;
+}
+
+static int rtl9300_i2c_do_xfer(struct rtl9300_i2c *i2c, struct rtl9300_i2c_xfer *xfer)
+{
+	u32 val;
+	int ret;
+
+	ret = regmap_field_write(i2c->fields[F_I2C_TRIG], 1);
+	if (ret)
+		return ret;
+
+	ret = regmap_field_read_poll_timeout(i2c->fields[F_I2C_TRIG], val, !val, 100, 100000);
+	if (ret)
+		return ret;
+
+	ret = regmap_field_read(i2c->fields[F_I2C_FAIL], &val);
+	if (ret)
+		return ret;
+	if (val)
 		return -EIO;
 
-	if (read_write == I2C_SMBUS_READ) {
-		if (size == I2C_SMBUS_BYTE || size == I2C_SMBUS_BYTE_DATA) {
-			ret = regmap_read(i2c->regmap,
-					  i2c->reg_base + RTL9300_I2C_MST_DATA_WORD0, &val);
+	if (!xfer->write) {
+		switch (xfer->type) {
+		case RTL9300_I2C_XFER_BYTE:
+			ret = regmap_read(i2c->regmap, i2c->data_reg, &val);
 			if (ret)
 				return ret;
-			data->byte = val & 0xff;
-		} else if (size == I2C_SMBUS_WORD_DATA) {
-			ret = regmap_read(i2c->regmap,
-					  i2c->reg_base + RTL9300_I2C_MST_DATA_WORD0, &val);
+
+			*xfer->data = val & 0xff;
+			break;
+		case RTL9300_I2C_XFER_WORD:
+			ret = regmap_read(i2c->regmap, i2c->data_reg, &val);
 			if (ret)
 				return ret;
-			data->word = val & 0xffff;
-		} else {
-			ret = rtl9300_i2c_read(i2c, &data->block[0], len);
+
+			put_unaligned(val & 0xffff, (u16*)xfer->data);
+			break;
+		default:
+			ret = rtl9300_i2c_read(i2c, xfer->data, xfer->data_len);
 			if (ret)
 				return ret;
+			break;
 		}
 	}
 
···
 {
 	struct rtl9300_i2c_chan *chan = i2c_get_adapdata(adap);
 	struct rtl9300_i2c *i2c = chan->i2c;
-	int len = 0, ret;
+	struct rtl9300_i2c_xfer xfer = {0};
+	int ret;
 
-	mutex_lock(&i2c->lock);
-	if (chan->sda_pin != i2c->sda_pin) {
-		ret = rtl9300_i2c_config_io(i2c, chan->sda_pin);
-		if (ret)
-			goto out_unlock;
-		i2c->sda_pin = chan->sda_pin;
-	}
+	if (addr > 0x7f)
+		return -EINVAL;
+
+	guard(rtl9300_i2c)(i2c);
+
+	ret = rtl9300_i2c_config_chan(i2c, chan);
+	if (ret)
+		return ret;
+
+	xfer.dev_addr = addr & 0x7f;
+	xfer.write = (read_write == I2C_SMBUS_WRITE);
+	xfer.reg_addr = command;
+	xfer.reg_addr_len = 1;
 
 	switch (size) {
 	case I2C_SMBUS_BYTE:
-		if (read_write == I2C_SMBUS_WRITE) {
-			ret = rtl9300_i2c_config_xfer(i2c, chan, addr, 0);
-			if (ret)
-				goto out_unlock;
-			ret = rtl9300_i2c_reg_addr_set(i2c, command, 1);
-			if (ret)
-				goto out_unlock;
-		} else {
-			ret = rtl9300_i2c_config_xfer(i2c, chan, addr, 1);
-			if (ret)
-				goto out_unlock;
-			ret = rtl9300_i2c_reg_addr_set(i2c, 0, 0);
-			if (ret)
-				goto out_unlock;
-		}
+		xfer.data = (read_write == I2C_SMBUS_READ) ? &data->byte : &command;
+		xfer.data_len = 1;
+		xfer.reg_addr = 0;
+		xfer.reg_addr_len = 0;
+		xfer.type = RTL9300_I2C_XFER_BYTE;
 		break;
-
 	case I2C_SMBUS_BYTE_DATA:
-		ret = rtl9300_i2c_reg_addr_set(i2c, command, 1);
-		if (ret)
-			goto out_unlock;
-		ret = rtl9300_i2c_config_xfer(i2c, chan, addr, 1);
-		if (ret)
-			goto out_unlock;
-		if (read_write == I2C_SMBUS_WRITE) {
-			ret = rtl9300_i2c_writel(i2c, data->byte);
-			if (ret)
-				goto out_unlock;
-		}
+		xfer.data = &data->byte;
+		xfer.data_len = 1;
+		xfer.type = RTL9300_I2C_XFER_BYTE;
 		break;
-
 	case I2C_SMBUS_WORD_DATA:
-		ret = rtl9300_i2c_reg_addr_set(i2c, command, 1);
-		if (ret)
-			goto out_unlock;
-		ret = rtl9300_i2c_config_xfer(i2c, chan, addr, 2);
-		if (ret)
-			goto out_unlock;
-		if (read_write == I2C_SMBUS_WRITE) {
-			ret = rtl9300_i2c_writel(i2c, data->word);
-			if (ret)
-				goto out_unlock;
-		}
+		xfer.data = (u8 *)&data->word;
+		xfer.data_len = 2;
+		xfer.type = RTL9300_I2C_XFER_WORD;
 		break;
-
 	case I2C_SMBUS_BLOCK_DATA:
-		ret = rtl9300_i2c_reg_addr_set(i2c, command, 1);
-		if (ret)
-			goto out_unlock;
-		if (data->block[0] < 1 || data->block[0] > I2C_SMBUS_BLOCK_MAX) {
-			ret = -EINVAL;
-			goto out_unlock;
-		}
-		ret = rtl9300_i2c_config_xfer(i2c, chan, addr, data->block[0] + 1);
-		if (ret)
-			goto out_unlock;
-		if (read_write == I2C_SMBUS_WRITE) {
-			ret = rtl9300_i2c_write(i2c, &data->block[0], data->block[0] + 1);
-			if (ret)
-				goto out_unlock;
-		}
-		len = data->block[0] + 1;
+		xfer.data = &data->block[0];
+		xfer.data_len = data->block[0] + 1;
+		xfer.type = RTL9300_I2C_XFER_BLOCK;
 		break;
-
+	case I2C_SMBUS_I2C_BLOCK_DATA:
+		xfer.data = &data->block[1];
+		xfer.data_len = data->block[0];
+		xfer.type = RTL9300_I2C_XFER_BLOCK;
+		break;
 	default:
 		dev_err(&adap->dev, "Unsupported transaction %d\n", size);
-		ret = -EOPNOTSUPP;
-		goto out_unlock;
+		return -EOPNOTSUPP;
 	}
 
-	ret = rtl9300_i2c_execute_xfer(i2c, read_write, size, data, len);
+	ret = rtl9300_i2c_prepare_xfer(i2c, &xfer);
+	if (ret)
+		return ret;
 
-out_unlock:
-	mutex_unlock(&i2c->lock);
-
-	return ret;
+	return rtl9300_i2c_do_xfer(i2c, &xfer);
 }
 
 static u32 rtl9300_i2c_func(struct i2c_adapter *a)
 {
 	return I2C_FUNC_SMBUS_BYTE | I2C_FUNC_SMBUS_BYTE_DATA |
-	       I2C_FUNC_SMBUS_WORD_DATA | I2C_FUNC_SMBUS_BLOCK_DATA;
+	       I2C_FUNC_SMBUS_WORD_DATA | I2C_FUNC_SMBUS_BLOCK_DATA |
+	       I2C_FUNC_SMBUS_I2C_BLOCK;
 }
 
 static const struct i2c_algorithm rtl9300_i2c_algo = {
···
 {
 	struct device *dev = &pdev->dev;
 	struct rtl9300_i2c *i2c;
-	u32 clock_freq, sda_pin;
-	int ret, i = 0;
 	struct fwnode_handle *child;
+	struct rtl9300_i2c_drv_data *drv_data;
+	struct reg_field fields[F_NUM_FIELDS];
+	u32 clock_freq, scl_num, sda_num;
+	int ret, i = 0;
 
 	i2c = devm_kzalloc(dev, sizeof(*i2c), GFP_KERNEL);
 	if (!i2c)
···
 	if (ret)
 		return ret;
 
+	ret = device_property_read_u32(dev, "realtek,scl", &scl_num);
+	if (ret || scl_num != 1)
+		scl_num = 0;
+	i2c->scl_num = (u8)scl_num;
+
 	platform_set_drvdata(pdev, i2c);
 
-	if (device_get_child_node_count(dev) > RTL9300_I2C_MUX_NCHAN)
+	drv_data = (struct rtl9300_i2c_drv_data *)device_get_match_data(i2c->dev);
+	if (device_get_child_node_count(dev) > drv_data->max_nchan)
 		return dev_err_probe(dev, -EINVAL, "Too many channels\n");
 
+	i2c->data_reg = i2c->reg_base + drv_data->data_reg;
+	for (i = 0; i < F_NUM_FIELDS; i++) {
+		fields[i] = drv_data->field_desc[i].field;
+		if (drv_data->field_desc[i].scope == REG_SCOPE_MASTER)
+			fields[i].reg += i2c->reg_base;
+	}
+	ret = devm_regmap_field_bulk_alloc(dev, i2c->regmap, i2c->fields,
+					   fields, F_NUM_FIELDS);
+	if (ret)
+		return ret;
+
+	i = 0;
 	device_for_each_child_node(dev, child) {
 		struct rtl9300_i2c_chan *chan = &i2c->chans[i];
 		struct i2c_adapter *adap = &chan->adap;
 
-		ret = fwnode_property_read_u32(child, "reg", &sda_pin);
+		ret = fwnode_property_read_u32(child, "reg", &sda_num);
 		if (ret)
 			return ret;
 
···
 		case I2C_MAX_STANDARD_MODE_FREQ:
 			chan->bus_freq = RTL9300_I2C_STD_FREQ;
 			break;
-
 		case I2C_MAX_FAST_MODE_FREQ:
 			chan->bus_freq = RTL9300_I2C_FAST_FREQ;
 			break;
 		default:
 			dev_warn(i2c->dev, "SDA%d clock-frequency %d not supported using default\n",
-				 sda_pin, clock_freq);
+				 sda_num, clock_freq);
 			break;
 		}
 
-		chan->sda_pin = sda_pin;
+		chan->sda_num = sda_num;
 		chan->i2c = i2c;
 		adap = &i2c->chans[i].adap;
 		adap->owner = THIS_MODULE;
···
 		adap->dev.parent = dev;
 		i2c_set_adapdata(adap, chan);
 		adap->dev.of_node = to_of_node(child);
-		snprintf(adap->name, sizeof(adap->name), "%s SDA%d\n", dev_name(dev), sda_pin);
+		snprintf(adap->name, sizeof(adap->name), "%s SDA%d\n", dev_name(dev), sda_num);
 		i++;
 
 		ret = devm_i2c_add_adapter(dev, adap);
 		if (ret)
 			return ret;
 	}
-	i2c->sda_pin = 0xff;
+	i2c->sda_num = 0xff;
+
+	/* only use standard read format */
+	ret = regmap_field_write(i2c->fields[F_RD_MODE], 0);
+	if (ret)
+		return ret;
 
 	return 0;
 }
 
+#define GLB_REG_FIELD(reg, msb, lsb)    \
+	{ .field = REG_FIELD(reg, msb, lsb), .scope = REG_SCOPE_GLOBAL }
+#define MST_REG_FIELD(reg, msb, lsb)    \
+	{ .field = REG_FIELD(reg, msb, lsb), .scope = REG_SCOPE_MASTER }
+
+static const struct rtl9300_i2c_drv_data rtl9300_i2c_drv_data = {
+	.field_desc = {
+		[F_MEM_ADDR]		= MST_REG_FIELD(RTL9300_I2C_MST_CTRL1, 8, 31),
+		[F_SDA_OUT_SEL]		= MST_REG_FIELD(RTL9300_I2C_MST_CTRL1, 4, 6),
+		[F_SCL_SEL]		= MST_REG_FIELD(RTL9300_I2C_MST_CTRL1, 3, 3),
+		[F_RWOP]		= MST_REG_FIELD(RTL9300_I2C_MST_CTRL1, 2, 2),
+		[F_I2C_FAIL]		= MST_REG_FIELD(RTL9300_I2C_MST_CTRL1, 1, 1),
+		[F_I2C_TRIG]		= MST_REG_FIELD(RTL9300_I2C_MST_CTRL1, 0, 0),
+		[F_RD_MODE]		= MST_REG_FIELD(RTL9300_I2C_MST_CTRL2, 15, 15),
+		[F_DEV_ADDR]		= MST_REG_FIELD(RTL9300_I2C_MST_CTRL2, 8, 14),
+		[F_DATA_WIDTH]		= MST_REG_FIELD(RTL9300_I2C_MST_CTRL2, 4, 7),
+		[F_MEM_ADDR_WIDTH]	= MST_REG_FIELD(RTL9300_I2C_MST_CTRL2, 2, 3),
+		[F_SCL_FREQ]		= MST_REG_FIELD(RTL9300_I2C_MST_CTRL2, 0, 1),
+		[F_SDA_SEL]		= GLB_REG_FIELD(RTL9300_I2C_MST_GLB_CTRL, 0, 7),
+	},
+	.select_scl = rtl9300_i2c_select_scl,
+	.data_reg = RTL9300_I2C_MST_DATA_WORD0,
+	.max_nchan = RTL9300_I2C_MUX_NCHAN,
+};
+
+static const struct rtl9300_i2c_drv_data rtl9310_i2c_drv_data = {
+	.field_desc = {
+		[F_SCL_SEL]		= GLB_REG_FIELD(RTL9310_I2C_MST_IF_SEL, 12, 13),
+		[F_SDA_SEL]		= GLB_REG_FIELD(RTL9310_I2C_MST_IF_SEL, 0, 11),
+		[F_SCL_FREQ]		= MST_REG_FIELD(RTL9310_I2C_MST_CTRL, 30, 31),
+		[F_DEV_ADDR]		= MST_REG_FIELD(RTL9310_I2C_MST_CTRL, 11, 17),
+		[F_SDA_OUT_SEL]		= MST_REG_FIELD(RTL9310_I2C_MST_CTRL, 18, 21),
+		[F_MEM_ADDR_WIDTH]	= MST_REG_FIELD(RTL9310_I2C_MST_CTRL, 9, 10),
+		[F_DATA_WIDTH]		= MST_REG_FIELD(RTL9310_I2C_MST_CTRL, 5, 8),
+		[F_RD_MODE]		= MST_REG_FIELD(RTL9310_I2C_MST_CTRL, 4, 4),
+		[F_RWOP]		= MST_REG_FIELD(RTL9310_I2C_MST_CTRL, 2, 2),
+		[F_I2C_FAIL]		= MST_REG_FIELD(RTL9310_I2C_MST_CTRL, 1, 1),
+		[F_I2C_TRIG]		= MST_REG_FIELD(RTL9310_I2C_MST_CTRL, 0, 0),
+		[F_MEM_ADDR]		= MST_REG_FIELD(RTL9310_I2C_MST_MEMADDR_CTRL, 0, 23),
+	},
+	.select_scl = rtl9310_i2c_select_scl,
+	.data_reg = RTL9310_I2C_MST_DATA_CTRL,
+	.max_nchan = RTL9310_I2C_MUX_NCHAN,
+};
+
 static const struct of_device_id i2c_rtl9300_dt_ids[] = {
-	{ .compatible = "realtek,rtl9301-i2c" },
-	{ .compatible = "realtek,rtl9302b-i2c" },
-	{ .compatible = "realtek,rtl9302c-i2c" },
-	{ .compatible = "realtek,rtl9303-i2c" },
+	{ .compatible = "realtek,rtl9301-i2c", .data = (void *) &rtl9300_i2c_drv_data },
+	{ .compatible = "realtek,rtl9302b-i2c", .data = (void *) &rtl9300_i2c_drv_data },
+	{ .compatible = "realtek,rtl9302c-i2c", .data = (void *) &rtl9300_i2c_drv_data },
+	{ .compatible = "realtek,rtl9303-i2c", .data = (void *) &rtl9300_i2c_drv_data },
+	{ .compatible = "realtek,rtl9310-i2c", .data = (void *) &rtl9310_i2c_drv_data },
+	{ .compatible = "realtek,rtl9311-i2c", .data = (void *) &rtl9310_i2c_drv_data },
+	{ .compatible = "realtek,rtl9312-i2c", .data = (void *) &rtl9310_i2c_drv_data },
+	{ .compatible = "realtek,rtl9313-i2c", .data = (void *) &rtl9310_i2c_drv_data },
 	{}
 };
 MODULE_DEVICE_TABLE(of, i2c_rtl9300_dt_ids);

include/linux/i2c-algo-pca.h

···
 	void 				*data;	/* private low level data */
 	void (*write_byte)		(void *data, int reg, int val);
 	int  (*read_byte)		(void *data, int reg);
-	int  (*wait_for_completion)	(void *data);
+	int  (*wait_for_completion_cb)	(void *data);
 	void (*reset_chip)		(void *data);
 	/* For PCA9564, use one of the predefined frequencies:
 	 * 330000, 288000, 217000, 146000, 88000, 59000, 44000, 36000