Merge tag 'i2c-for-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c updates from Wolfram Sang:
 "Core:

   - list-based mechanisms for handling auto-detected and userspace
     created clients are replaced with a flag-based approach. The
     resulting code is much simpler as well as the locking.

   - i2c clients now get a default debugfs dir managed by the I2C core.
     Drivers don't have to maintain their own directory anymore.

  Driver updates:

   - xiic: atomic_transfer support

   - imx-lpi2c: DMA and target mode support

   - riic cleanups

   - npcm: better timeout handling and more precise frequency setups

   - davinci: remove unused platform_data

   - at24: add new compatibles for variants from Giantec and Puya
     Semiconductor (together with a new vendor prefix)"

* tag 'i2c-for-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (52 commits)
  i2c: add kdoc for the new debugfs entry of clients
  i2c: designware: Actually make use of the I2C_DW_COMMON and I2C_DW symbol namespaces
  i2c: add core-managed per-client directory in debugfs
  i2c: Force ELAN06FA touchpad I2C bus freq to 100KHz
  i2c: riic: Add `riic_bus_barrier()` to check bus availability
  i2c: riic: Use predefined macro and simplify clock tick calculation
  i2c: riic: Mark riic_irqs array as const
  i2c: riic: Make use of devres helper to request deasserted reset line
  i2c: riic: Use GENMASK() macro for bitmask definitions
  i2c: riic: Use BIT macro consistently
  i2c: riic: Use local `dev` pointer in `dev_err_probe()`
  i2c: riic: Use dev_err_probe in probe and riic_init_hw functions
  i2c: riic: Introduce a separate variable for IRQ
  i2c: amd756: Remove superfluous TODO
  Revert "i2c: amd756: Fix endianness handling for word data"
  i2c: i801: Add lis3lv02d for Dell Precision M6800
  i2c: i801: Remove unnecessary PCI function call
  i2c: core: Allocate temp client on the stack in i2c_detect
  i2c: slave-eeprom: Constify 'struct bin_attribute'
  i2c: imx-lpi2c: make controller available until the system enters suspend_noirq() and from resume_noirq().
  ...

Author: torvalds

Documentation/devicetree/bindings/eeprom/at24.yaml

@@ -134,9 +134,14 @@ properties:
           - const: atmel,24c64
       - items:
           - enum:
+              - giantec,gt24p128f
               - renesas,r1ex24128
               - samsung,s524ad0xd1
           - const: atmel,24c128
+      - items:
+          - enum:
+              - puya,p24c256c
+          - const: atmel,24c256
       - items:
           - const: microchip,24aa025e48
       - items:

Documentation/devicetree/bindings/i2c/i2c-exynos5.yaml

@@ -25,6 +25,7 @@ properties:
           - samsung,exynos5250-hsi2c    # Exynos5250 and Exynos5420
           - samsung,exynos5260-hsi2c    # Exynos5260
           - samsung,exynos7-hsi2c       # Exynos7
+          - samsung,exynos8895-hsi2c
           - samsung,exynosautov9-hsi2c
       - items:
           - enum:

Documentation/devicetree/bindings/i2c/qcom,i2c-cci.yaml

@@ -34,6 +34,7 @@ properties:
               - qcom,sm8450-cci
               - qcom,sm8550-cci
               - qcom,sm8650-cci
+              - qcom,x1e80100-cci
           - const: qcom,msm8996-cci # CCI v2
 
   "#address-cells":
@@ -224,6 +225,7 @@ allOf:
             enum:
               - qcom,sm8550-cci
               - qcom,sm8650-cci
+              - qcom,x1e80100-cci
     then:
       properties:
         clocks:

Documentation/devicetree/bindings/i2c/renesas,riic.yaml

@@ -26,7 +26,9 @@ properties:
           - const: renesas,riic-rz      # RZ/A or RZ/G2L
 
       - items:
-          - const: renesas,riic-r9a08g045   # RZ/G3S
+          - enum:
+              - renesas,riic-r9a08g045   # RZ/G3S
+              - renesas,riic-r9a09g047   # RZ/G3E
           - const: renesas,riic-r9a09g057   # RZ/V2H(P)
 
       - const: renesas,riic-r9a09g057   # RZ/V2H(P)
@@ -89,6 +91,7 @@ if:
           - renesas,riic-r9a07g043
           - renesas,riic-r9a07g044
           - renesas,riic-r9a07g054
+          - renesas,riic-r9a09g057
 then:
   required:
     - resets

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -1204,6 +1204,8 @@ patternProperties:
     description: PulsedLight, Inc
   "^purism,.*":
     description: Purism, SPC
+  "^puya,.*":
+    description: Puya Semiconductor (Shanghai) Co., Ltd.
   "^qca,.*":
     description: Qualcomm Atheros, Inc.
   "^qcom,.*":

drivers/i2c/busses/Kconfig

@@ -503,7 +503,7 @@ config I2C_BRCMSTB
 	tristate "BRCM Settop/DSL I2C controller"
 	depends on ARCH_BCM2835 || ARCH_BCMBCA || ARCH_BRCMSTB || \
 		   BMIPS_GENERIC || COMPILE_TEST
-	default y
+	default ARCH_BCM2835 || ARCH_BCMBCA || ARCH_BRCMSTB || BMIPS_GENERIC
 	help
 	  If you say yes to this option, support will be included for the
 	  I2C interface on the Broadcom Settop/DSL SoCs.
@@ -910,7 +910,7 @@ config I2C_MXS
 
 config I2C_NOMADIK
 	tristate "ST-Ericsson Nomadik/Ux500 I2C Controller"
-	depends on ARM_AMBA
+	depends on ARM_AMBA || COMPILE_TEST
 	help
 	  If you say yes to this option, support will be included for the
 	  I2C interface from ST-Ericsson's Nomadik and Ux500 architectures,

drivers/i2c/busses/i2c-amd756.c

@@ -211,7 +211,7 @@ static s32 amd756_access(struct i2c_adapter * adap, u16 addr,
 		       SMB_HOST_ADDRESS);
 		outb_p(command, SMB_HOST_COMMAND);
 		if (read_write == I2C_SMBUS_WRITE)
-			outw_p(data->word, SMB_HOST_DATA);	/* TODO: endian???? */
+			outw_p(data->word, SMB_HOST_DATA);
 		size = AMD756_WORD_DATA;
 		break;
 	case I2C_SMBUS_BLOCK_DATA:
@@ -256,7 +256,7 @@ static s32 amd756_access(struct i2c_adapter * adap, u16 addr,
 		data->byte = inw_p(SMB_HOST_DATA);
 		break;
 	case AMD756_WORD_DATA:
-		data->word = inw_p(SMB_HOST_DATA);	/* TODO: endian???? */
+		data->word = inw_p(SMB_HOST_DATA);
 		break;
 	case AMD756_BLOCK_DATA:
 		data->block[0] = inw_p(SMB_HOST_DATA) & 0x3f;

drivers/i2c/busses/i2c-davinci.c

@@ -11,23 +11,23 @@
  *
  * ----------------------------------------------------------------------------
  */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/i2c.h>
+
 #include <linux/clk.h>
-#include <linux/errno.h>
-#include <linux/sched.h>
+#include <linux/cpufreq.h>
+#include <linux/delay.h>
 #include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
 #include <linux/interrupt.h>
-#include <linux/platform_device.h>
 #include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/cpufreq.h>
-#include <linux/gpio/consumer.h>
-#include <linux/of.h>
-#include <linux/platform_data/i2c-davinci.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
+#include <linux/property.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
 
 /* ----- global defines ----------------------------------------------- */
 
@@ -117,6 +117,8 @@
 /* timeout for pm runtime autosuspend */
 #define DAVINCI_I2C_PM_TIMEOUT	1000	/* ms */
 
+#define DAVINCI_I2C_DEFAULT_BUS_FREQ	100
+
 struct davinci_i2c_dev {
 	struct device           *dev;
 	void __iomem		*base;
@@ -132,13 +134,10 @@ struct davinci_i2c_dev {
 #ifdef CONFIG_CPU_FREQ
 	struct notifier_block	freq_transition;
 #endif
-	struct davinci_i2c_platform_data *pdata;
-};
-
-/* default platform data to use if not supplied in the platform_device */
-static struct davinci_i2c_platform_data davinci_i2c_platform_data_default = {
-	.bus_freq	= 100,
-	.bus_delay	= 0,
+	/* standard bus frequency (kHz) */
+	unsigned int		bus_freq;
+	/* Chip has a ICPFUNC register */
+	bool			has_pfunc;
 };
 
 static inline void davinci_i2c_write_reg(struct davinci_i2c_dev *i2c_dev,
@@ -168,14 +167,12 @@ static inline void davinci_i2c_reset_ctrl(struct davinci_i2c_dev *i2c_dev,
 
 static void i2c_davinci_calc_clk_dividers(struct davinci_i2c_dev *dev)
 {
-	struct davinci_i2c_platform_data *pdata = dev->pdata;
 	u16 psc;
 	u32 clk;
 	u32 d;
 	u32 clkh;
 	u32 clkl;
 	u32 input_clock = clk_get_rate(dev->clk);
-	struct device_node *of_node = dev->dev->of_node;
 
 	/* NOTE: I2C Clock divider programming info
 	 * As per I2C specs the following formulas provide prescaler
@@ -209,19 +206,19 @@ static void i2c_davinci_calc_clk_dividers(struct davinci_i2c_dev *dev)
 		psc++;	/* better to run under spec than over */
 	d = (psc >= 2) ? 5 : 7 - psc;
 
-	if (of_node && of_device_is_compatible(of_node, "ti,keystone-i2c"))
+	if (device_is_compatible(dev->dev, "ti,keystone-i2c"))
 		d = 6;
 
-	clk = ((input_clock / (psc + 1)) / (pdata->bus_freq * 1000));
+	clk = ((input_clock / (psc + 1)) / (dev->bus_freq * 1000));
 	/* Avoid driving the bus too fast because of rounding errors above */
-	if (input_clock / (psc + 1) / clk > pdata->bus_freq * 1000)
+	if (input_clock / (psc + 1) / clk > dev->bus_freq * 1000)
 		clk++;
 	/*
 	 * According to I2C-BUS Spec 2.1, in FAST-MODE LOW period should be at
 	 * least 1.3uS, which is not the case with 50% duty cycle. Driving HIGH
 	 * to LOW ratio as 1 to 2 is more safe.
 	 */
-	if (pdata->bus_freq > 100)
+	if (dev->bus_freq > 100)
 		clkl = (clk << 1) / 3;
 	else
 		clkl = (clk >> 1);
@@ -255,8 +252,6 @@ static void i2c_davinci_calc_clk_dividers(struct davinci_i2c_dev *dev)
  */
 static int i2c_davinci_init(struct davinci_i2c_dev *dev)
 {
-	struct davinci_i2c_platform_data *pdata = dev->pdata;
-
 	/* put I2C into reset */
 	davinci_i2c_reset_ctrl(dev, 0);
 
@@ -274,8 +269,7 @@ static int i2c_davinci_init(struct davinci_i2c_dev *dev)
 		davinci_i2c_read_reg(dev, DAVINCI_I2C_CLKL_REG));
 	dev_dbg(dev->dev, "CLKH = %d\n",
 		davinci_i2c_read_reg(dev, DAVINCI_I2C_CLKH_REG));
-	dev_dbg(dev->dev, "bus_freq = %dkHz, bus_delay = %d\n",
-		pdata->bus_freq, pdata->bus_delay);
+	dev_dbg(dev->dev, "bus_freq = %dkHz\n", dev->bus_freq);
 
 
 	/* Take the I2C module out of reset: */
@@ -309,12 +303,6 @@ static void davinci_i2c_unprepare_recovery(struct i2c_adapter *adap)
 	i2c_davinci_init(dev);
 }
 
-static struct i2c_bus_recovery_info davinci_i2c_gpio_recovery_info = {
-	.recover_bus = i2c_generic_scl_recovery,
-	.prepare_recovery = davinci_i2c_prepare_recovery,
-	.unprepare_recovery = davinci_i2c_unprepare_recovery,
-};
-
 static void davinci_i2c_set_scl(struct i2c_adapter *adap, int val)
 {
 	struct davinci_i2c_dev *dev = i2c_get_adapdata(adap);
@@ -414,7 +402,6 @@ static int
 i2c_davinci_xfer_msg(struct i2c_adapter *adap, struct i2c_msg *msg, int stop)
 {
 	struct davinci_i2c_dev *dev = i2c_get_adapdata(adap);
-	struct davinci_i2c_platform_data *pdata = dev->pdata;
 	u32 flag;
 	u16 w;
 	unsigned long time_left;
@@ -424,10 +411,6 @@ i2c_davinci_xfer_msg(struct i2c_adapter *adap, struct i2c_msg *msg, int stop)
 		return -EADDRNOTAVAIL;
 	}
 
-	/* Introduce a delay, required for some boards (e.g Davinci EVM) */
-	if (pdata->bus_delay)
-		udelay(pdata->bus_delay);
-
 	/* set the target address */
 	davinci_i2c_write_reg(dev, DAVINCI_I2C_SAR_REG, msg->addr);
 
@@ -758,8 +741,8 @@ static int davinci_i2c_probe(struct platform_device *pdev)
 {
 	struct davinci_i2c_dev *dev;
 	struct i2c_adapter *adap;
-	struct i2c_bus_recovery_info *rinfo;
 	int r, irq;
+	u32 prop;
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
@@ -773,29 +756,15 @@ static int davinci_i2c_probe(struct platform_device *pdev)
 
 	dev->dev = &pdev->dev;
 	dev->irq = irq;
-	dev->pdata = dev_get_platdata(&pdev->dev);
 	platform_set_drvdata(pdev, dev);
 
-	if (!dev->pdata && pdev->dev.of_node) {
-		u32 prop;
-
-		dev->pdata = devm_kzalloc(&pdev->dev,
-			sizeof(struct davinci_i2c_platform_data), GFP_KERNEL);
-		if (!dev->pdata)
-			return -ENOMEM;
-
-		memcpy(dev->pdata, &davinci_i2c_platform_data_default,
-			sizeof(struct davinci_i2c_platform_data));
-		if (!of_property_read_u32(pdev->dev.of_node, "clock-frequency",
-			&prop))
-			dev->pdata->bus_freq = prop / 1000;
-
-		dev->pdata->has_pfunc =
-			of_property_read_bool(pdev->dev.of_node,
-					      "ti,has-pfunc");
-	} else if (!dev->pdata) {
-		dev->pdata = &davinci_i2c_platform_data_default;
-	}
+	r = device_property_read_u32(&pdev->dev, "clock-frequency", &prop);
+	if (r)
+		prop = DAVINCI_I2C_DEFAULT_BUS_FREQ;
+
+	dev->bus_freq = prop / 1000;
+
+	dev->has_pfunc = device_property_present(&pdev->dev, "ti,has-pfunc");
 
 	dev->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(dev->clk))
@@ -841,25 +810,10 @@ static int davinci_i2c_probe(struct platform_device *pdev)
 	adap->algo = &i2c_davinci_algo;
 	adap->dev.parent = &pdev->dev;
 	adap->timeout = DAVINCI_I2C_TIMEOUT;
-	adap->dev.of_node = pdev->dev.of_node;
+	adap->dev.of_node = dev_of_node(&pdev->dev);
 
-	if (dev->pdata->has_pfunc)
+	if (dev->has_pfunc)
 		adap->bus_recovery_info = &davinci_i2c_scl_recovery_info;
-	else if (dev->pdata->gpio_recovery) {
-		rinfo =  &davinci_i2c_gpio_recovery_info;
-		adap->bus_recovery_info = rinfo;
-		rinfo->scl_gpiod = devm_gpiod_get(&pdev->dev, "scl",
-						  GPIOD_OUT_HIGH_OPEN_DRAIN);
-		if (IS_ERR(rinfo->scl_gpiod)) {
-			r = PTR_ERR(rinfo->scl_gpiod);
-			goto err_unuse_clocks;
-		}
-		rinfo->sda_gpiod = devm_gpiod_get(&pdev->dev, "sda", GPIOD_IN);
-		if (IS_ERR(rinfo->sda_gpiod)) {
-			r = PTR_ERR(rinfo->sda_gpiod);
-			goto err_unuse_clocks;
-		}
-	}
 
 	adap->nr = pdev->id;
 	r = i2c_add_numbered_adapter(adap);

drivers/i2c/busses/i2c-designware-common.c

@@ -8,6 +8,9 @@
  * Copyright (C) 2007 MontaVista Software Inc.
  * Copyright (C) 2009 Provigent Ltd.
  */
+
+#define DEFAULT_SYMBOL_NAMESPACE	"I2C_DW_COMMON"
+
 #include <linux/acpi.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
@@ -29,8 +32,6 @@
 #include <linux/types.h>
 #include <linux/units.h>
 
-#define DEFAULT_SYMBOL_NAMESPACE	"I2C_DW_COMMON"
-
 #include "i2c-designware-core.h"
 
 static const char *const abort_sources[] = {

drivers/i2c/busses/i2c-designware-master.c

@@ -8,6 +8,9 @@
  * Copyright (C) 2007 MontaVista Software Inc.
  * Copyright (C) 2009 Provigent Ltd.
  */
+
+#define DEFAULT_SYMBOL_NAMESPACE	"I2C_DW"
+
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/errno.h>
@@ -22,8 +25,6 @@
 #include <linux/regmap.h>
 #include <linux/reset.h>
 
-#define DEFAULT_SYMBOL_NAMESPACE	"I2C_DW"
-
 #include "i2c-designware-core.h"
 
 #define AMD_TIMEOUT_MIN_US	25

drivers/i2c/busses/i2c-designware-slave.c

@@ -6,6 +6,9 @@
  *
  * Copyright (C) 2016 Synopsys Inc.
  */
+
+#define DEFAULT_SYMBOL_NAMESPACE	"I2C_DW"
+
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/errno.h>
@@ -16,8 +19,6 @@
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 
-#define DEFAULT_SYMBOL_NAMESPACE	"I2C_DW"
-
 #include "i2c-designware-core.h"
 
 static void i2c_dw_configure_fifo_slave(struct dw_i2c_dev *dev)