Merge tag 'char-misc-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-miscHEADtorvalds/mastertorvalds/HEADmaster

Pull Char/Misc/IIO/Binder updates from Greg KH:
 "Here is the big set of char/misc/iio and other driver subsystem
  changes for 6.18-rc1.

  Loads of different stuff in here, it was a busy development cycle in
  lots of different subsystems, with over 27k new lines added to the
  tree.

  Included in here are:

   - IIO updates including new drivers, reworking of existing apis, and
     other goodness in the sensor subsystems

   - MEI driver updates and additions

   - NVMEM driver updates

   - slimbus removal for an unused driver and some other minor updates

   - coresight driver updates and additions

   - MHI driver updates

   - comedi driver updates and fixes

   - extcon driver updates

   - interconnect driver additions

   - eeprom driver updates and fixes

   - minor UIO driver updates

   - tiny W1 driver updates

  But the majority of new code is in the rust bindings and additions,
  which includes:

   - misc driver rust binding updates for read/write support, we can now
     write "normal" misc drivers in rust fully, and the sample driver
     shows how this can be done.

   - Initial framework for USB driver rust bindings, which are disabled
     for now in the build, due to limited support, but coming in through
     this tree due to dependencies on other rust binding changes that
     were in here. I'll be enabling these back on in the build in the
     usb.git tree after -rc1 is out so that developers can continue to
     work on these in linux-next over the next development cycle.

   - Android Binder driver implemented in Rust.

     This is the big one, and was driving a huge majority of the rust
     binding work over the past years. Right now there are two binder
     drivers in the kernel, selected only at build time as to which one
     to use as binder wants to be included in the system at boot time.

     The binder C maintainers all agreed on this, as eventually, they
     want the C code to be removed from the tree, but it will take a few
     releases to get there while both are maintained to ensure that the
     rust implementation is fully stable and compliant with the existing
     userspace apis.

  All of these have been in linux-next for a while"

* tag 'char-misc-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (320 commits)
  rust: usb: keep usb::Device private for now
  rust: usb: don't retain device context for the interface parent
  USB: disable rust bindings from the build for now
  samples: rust: add a USB driver sample
  rust: usb: add basic USB abstractions
  coresight: Add label sysfs node support
  dt-bindings: arm: Add label in the coresight components
  coresight: tnoc: add new AMBA ID to support Trace Noc V2
  coresight: Fix incorrect handling for return value of devm_kzalloc
  coresight: tpda: fix the logic to setup the element size
  coresight: trbe: Return NULL pointer for allocation failures
  coresight: Refactor runtime PM
  coresight: Make clock sequence consistent
  coresight: Refactor driver data allocation
  coresight: Consolidate clock enabling
  coresight: Avoid enable programming clock duplicately
  coresight: Appropriately disable trace bus clocks
  coresight: Appropriately disable programming clocks
  coresight: etm4x: Support atclk
  coresight: catu: Support atclk
  ...

1 files changed, 4 insertions, 282 deletions

diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
index 4614cf848535..1484adff00df 100644
--- a/drivers/iio/adc/exynos_adc.c
+++ b/drivers/iio/adc/exynos_adc.c
@@ -19,11 +19,9 @@
 #include <linux/clk.h>
 #include <linux/completion.h>
 #include <linux/of.h>
-#include <linux/of_irq.h>
 #include <linux/regulator/consumer.h>
 #include <linux/of_platform.h>
 #include <linux/err.h>
-#include <linux/input.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/machine.h>
@@ -31,21 +29,14 @@
 #include <linux/mfd/syscon.h>
 #include <linux/regmap.h>
 
-#include <linux/platform_data/touchscreen-s3c2410.h>
-
 /* S3C/EXYNOS4412/5250 ADC_V1 registers definitions */
 #define ADC_V1_CON(x)		((x) + 0x00)
-#define ADC_V1_TSC(x)		((x) + 0x04)
 #define ADC_V1_DLY(x)		((x) + 0x08)
 #define ADC_V1_DATX(x)		((x) + 0x0C)
 #define ADC_V1_DATY(x)		((x) + 0x10)
 #define ADC_V1_UPDN(x)		((x) + 0x14)
 #define ADC_V1_INTCLR(x)	((x) + 0x18)
 #define ADC_V1_MUX(x)		((x) + 0x1c)
-#define ADC_V1_CLRINTPNDNUP(x)	((x) + 0x20)
-
-/* S3C2410 ADC registers definitions */
-#define ADC_S3C2410_MUX(x)	((x) + 0x18)
 
 /* Future ADC_V2 registers definitions */
 #define ADC_V2_CON1(x)		((x) + 0x00)
@@ -61,13 +52,8 @@
 #define ADC_V1_CON_PRSCLV(x)	(((x) & 0xFF) << 6)
 #define ADC_V1_CON_STANDBY	(1u << 2)
 
-/* Bit definitions for S3C2410 ADC */
+/* Bit definitions for S3C2410 / S3C6410 ADC */
 #define ADC_S3C2410_CON_SELMUX(x) (((x) & 7) << 3)
-#define ADC_S3C2410_DATX_MASK	0x3FF
-#define ADC_S3C2416_CON_RES_SEL	(1u << 3)
-
-/* touch screen always uses channel 0 */
-#define ADC_S3C2410_MUX_TS	0
 
 /* ADCTSC Register Bits */
 #define ADC_S3C2443_TSC_UD_SEN		(1u << 8)
@@ -75,8 +61,6 @@
 #define ADC_S3C2410_TSC_YP_SEN		(1u << 6)
 #define ADC_S3C2410_TSC_XM_SEN		(1u << 5)
 #define ADC_S3C2410_TSC_XP_SEN		(1u << 4)
-#define ADC_S3C2410_TSC_PULL_UP_DISABLE	(1u << 3)
-#define ADC_S3C2410_TSC_AUTO_PST	(1u << 2)
 #define ADC_S3C2410_TSC_XY_PST(x)	(((x) & 0x3) << 0)
 
 #define ADC_TSC_WAIT4INT (ADC_S3C2410_TSC_YM_SEN | \
@@ -84,12 +68,6 @@
 			 ADC_S3C2410_TSC_XP_SEN | \
 			 ADC_S3C2410_TSC_XY_PST(3))
 
-#define ADC_TSC_AUTOPST	(ADC_S3C2410_TSC_YM_SEN | \
-			 ADC_S3C2410_TSC_YP_SEN | \
-			 ADC_S3C2410_TSC_XP_SEN | \
-			 ADC_S3C2410_TSC_AUTO_PST | \
-			 ADC_S3C2410_TSC_XY_PST(0))
-
 /* Bit definitions for ADC_V2 */
 #define ADC_V2_CON1_SOFT_RESET	(1u << 2)
 
@@ -121,14 +99,11 @@
 struct exynos_adc {
 	struct exynos_adc_data	*data;
 	struct device		*dev;
-	struct input_dev	*input;
 	void __iomem		*regs;
 	struct regmap		*pmu_map;
 	struct clk		*clk;
 	struct clk		*sclk;
 	unsigned int		irq;
-	unsigned int		tsirq;
-	unsigned int		delay;
 	struct regulator	*vdd;
 
 	struct completion	completion;
@@ -136,12 +111,6 @@ struct exynos_adc {
 	u32			value;
 	unsigned int            version;
 
-	bool			ts_enabled;
-
-	bool			read_ts;
-	u32			ts_x;
-	u32			ts_y;
-
 	/*
 	 * Lock to protect from potential concurrent access to the
 	 * completion callback during a manual conversion. For this driver
@@ -241,7 +210,7 @@ static void exynos_adc_v1_init_hw(struct exynos_adc *info)
 	writel(con1, ADC_V1_CON(info->regs));
 
 	/* set touchscreen delay */
-	writel(info->delay, ADC_V1_DLY(info->regs));
+	writel(10000, ADC_V1_DLY(info->regs));
 }
 
 static void exynos_adc_v1_exit_hw(struct exynos_adc *info)
@@ -307,53 +276,6 @@ static const struct exynos_adc_data exynos_adc_s5pv210_data = {
 	.start_conv	= exynos_adc_v1_start_conv,
 };
 
-static void exynos_adc_s3c2416_start_conv(struct exynos_adc *info,
-					  unsigned long addr)
-{
-	u32 con1;
-
-	/* Enable 12 bit ADC resolution */
-	con1 = readl(ADC_V1_CON(info->regs));
-	con1 |= ADC_S3C2416_CON_RES_SEL;
-	writel(con1, ADC_V1_CON(info->regs));
-
-	/* Select channel for S3C2416 */
-	writel(addr, ADC_S3C2410_MUX(info->regs));
-
-	con1 = readl(ADC_V1_CON(info->regs));
-	writel(con1 | ADC_CON_EN_START, ADC_V1_CON(info->regs));
-}
-
-static struct exynos_adc_data const exynos_adc_s3c2416_data = {
-	.num_channels	= MAX_ADC_V1_CHANNELS,
-	.mask		= ADC_DATX_MASK,	/* 12 bit ADC resolution */
-
-	.init_hw	= exynos_adc_v1_init_hw,
-	.exit_hw	= exynos_adc_v1_exit_hw,
-	.start_conv	= exynos_adc_s3c2416_start_conv,
-};
-
-static void exynos_adc_s3c2443_start_conv(struct exynos_adc *info,
-					  unsigned long addr)
-{
-	u32 con1;
-
-	/* Select channel for S3C2433 */
-	writel(addr, ADC_S3C2410_MUX(info->regs));
-
-	con1 = readl(ADC_V1_CON(info->regs));
-	writel(con1 | ADC_CON_EN_START, ADC_V1_CON(info->regs));
-}
-
-static struct exynos_adc_data const exynos_adc_s3c2443_data = {
-	.num_channels	= MAX_ADC_V1_CHANNELS,
-	.mask		= ADC_S3C2410_DATX_MASK, /* 10 bit ADC resolution */
-
-	.init_hw	= exynos_adc_v1_init_hw,
-	.exit_hw	= exynos_adc_v1_exit_hw,
-	.start_conv	= exynos_adc_s3c2443_start_conv,
-};
-
 static void exynos_adc_s3c64xx_start_conv(struct exynos_adc *info,
 					  unsigned long addr)
 {
@@ -365,15 +287,6 @@ static void exynos_adc_s3c64xx_start_conv(struct exynos_adc *info,
 	writel(con1 | ADC_CON_EN_START, ADC_V1_CON(info->regs));
 }
 
-static struct exynos_adc_data const exynos_adc_s3c24xx_data = {
-	.num_channels	= MAX_ADC_V1_CHANNELS,
-	.mask		= ADC_S3C2410_DATX_MASK, /* 10 bit ADC resolution */
-
-	.init_hw	= exynos_adc_v1_init_hw,
-	.exit_hw	= exynos_adc_v1_exit_hw,
-	.start_conv	= exynos_adc_s3c64xx_start_conv,
-};
-
 static struct exynos_adc_data const exynos_adc_s3c64xx_data = {
 	.num_channels	= MAX_ADC_V1_CHANNELS,
 	.mask		= ADC_DATX_MASK,	/* 12 bit ADC resolution */
@@ -486,18 +399,6 @@ static const struct exynos_adc_data exynos7_adc_data = {
 
 static const struct of_device_id exynos_adc_match[] = {
 	{
-		.compatible = "samsung,s3c2410-adc",
-		.data = &exynos_adc_s3c24xx_data,
-	}, {
-		.compatible = "samsung,s3c2416-adc",
-		.data = &exynos_adc_s3c2416_data,
-	}, {
-		.compatible = "samsung,s3c2440-adc",
-		.data = &exynos_adc_s3c24xx_data,
-	}, {
-		.compatible = "samsung,s3c2443-adc",
-		.data = &exynos_adc_s3c2443_data,
-	}, {
 		.compatible = "samsung,s3c6410-adc",
 		.data = &exynos_adc_s3c64xx_data,
 	}, {
@@ -580,55 +481,13 @@ static int exynos_read_raw(struct iio_dev *indio_dev,
 	return ret;
 }
 
-static int exynos_read_s3c64xx_ts(struct iio_dev *indio_dev, int *x, int *y)
-{
-	struct exynos_adc *info = iio_priv(indio_dev);
-	unsigned long time_left;
-	int ret;
-
-	mutex_lock(&info->lock);
-	info->read_ts = true;
-
-	reinit_completion(&info->completion);
-
-	writel(ADC_S3C2410_TSC_PULL_UP_DISABLE | ADC_TSC_AUTOPST,
-	       ADC_V1_TSC(info->regs));
-
-	/* Select the ts channel to be used and Trigger conversion */
-	info->data->start_conv(info, ADC_S3C2410_MUX_TS);
-
-	time_left = wait_for_completion_timeout(&info->completion,
-						EXYNOS_ADC_TIMEOUT);
-	if (time_left == 0) {
-		dev_warn(&indio_dev->dev, "Conversion timed out! Resetting\n");
-		if (info->data->init_hw)
-			info->data->init_hw(info);
-		ret = -ETIMEDOUT;
-	} else {
-		*x = info->ts_x;
-		*y = info->ts_y;
-		ret = 0;
-	}
-
-	info->read_ts = false;
-	mutex_unlock(&info->lock);
-
-	return ret;
-}
-
 static irqreturn_t exynos_adc_isr(int irq, void *dev_id)
 {
 	struct exynos_adc *info = dev_id;
 	u32 mask = info->data->mask;
 
 	/* Read value */
-	if (info->read_ts) {
-		info->ts_x = readl(ADC_V1_DATX(info->regs));
-		info->ts_y = readl(ADC_V1_DATY(info->regs));
-		writel(ADC_TSC_WAIT4INT | ADC_S3C2443_TSC_UD_SEN, ADC_V1_TSC(info->regs));
-	} else {
-		info->value = readl(ADC_V1_DATX(info->regs)) & mask;
-	}
+	info->value = readl(ADC_V1_DATX(info->regs)) & mask;
 
 	/* clear irq */
 	if (info->data->clear_irq)
@@ -639,46 +498,6 @@ static irqreturn_t exynos_adc_isr(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-/*
- * Here we (ab)use a threaded interrupt handler to stay running
- * for as long as the touchscreen remains pressed, we report
- * a new event with the latest data and then sleep until the
- * next timer tick. This mirrors the behavior of the old
- * driver, with much less code.
- */
-static irqreturn_t exynos_ts_isr(int irq, void *dev_id)
-{
-	struct exynos_adc *info = dev_id;
-	struct iio_dev *dev = dev_get_drvdata(info->dev);
-	u32 x, y;
-	bool pressed;
-	int ret;
-
-	while (READ_ONCE(info->ts_enabled)) {
-		ret = exynos_read_s3c64xx_ts(dev, &x, &y);
-		if (ret == -ETIMEDOUT)
-			break;
-
-		pressed = x & y & ADC_DATX_PRESSED;
-		if (!pressed) {
-			input_report_key(info->input, BTN_TOUCH, 0);
-			input_sync(info->input);
-			break;
-		}
-
-		input_report_abs(info->input, ABS_X, x & ADC_DATX_MASK);
-		input_report_abs(info->input, ABS_Y, y & ADC_DATY_MASK);
-		input_report_key(info->input, BTN_TOUCH, 1);
-		input_sync(info->input);
-
-		usleep_range(1000, 1100);
-	}
-
-	writel(0, ADC_V1_CLRINTPNDNUP(info->regs));
-
-	return IRQ_HANDLED;
-}
-
 static int exynos_adc_reg_access(struct iio_dev *indio_dev,
 			      unsigned reg, unsigned writeval,
 			      unsigned *readval)
@@ -730,78 +549,17 @@ static int exynos_adc_remove_devices(struct device *dev, void *c)
 	return 0;
 }
 
-static int exynos_adc_ts_open(struct input_dev *dev)
-{
-	struct exynos_adc *info = input_get_drvdata(dev);
-
-	WRITE_ONCE(info->ts_enabled, true);
-	enable_irq(info->tsirq);
-
-	return 0;
-}
-
-static void exynos_adc_ts_close(struct input_dev *dev)
-{
-	struct exynos_adc *info = input_get_drvdata(dev);
-
-	WRITE_ONCE(info->ts_enabled, false);
-	disable_irq(info->tsirq);
-}
-
-static int exynos_adc_ts_init(struct exynos_adc *info)
-{
-	int ret;
-
-	if (info->tsirq <= 0)
-		return -ENODEV;
-
-	info->input = input_allocate_device();
-	if (!info->input)
-		return -ENOMEM;
-
-	info->input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
-	info->input->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
-
-	input_set_abs_params(info->input, ABS_X, 0, 0x3FF, 0, 0);
-	input_set_abs_params(info->input, ABS_Y, 0, 0x3FF, 0, 0);
-
-	info->input->name = "S3C24xx TouchScreen";
-	info->input->id.bustype = BUS_HOST;
-	info->input->open = exynos_adc_ts_open;
-	info->input->close = exynos_adc_ts_close;
-
-	input_set_drvdata(info->input, info);
-
-	ret = input_register_device(info->input);
-	if (ret) {
-		input_free_device(info->input);
-		return ret;
-	}
-
-	ret = request_threaded_irq(info->tsirq, NULL, exynos_ts_isr,
-				   IRQF_ONESHOT | IRQF_NO_AUTOEN,
-				   "touchscreen", info);
-	if (ret)
-		input_unregister_device(info->input);
-
-	return ret;
-}
-
 static int exynos_adc_probe(struct platform_device *pdev)
 {
 	struct exynos_adc *info = NULL;
 	struct device_node *np = pdev->dev.of_node;
-	struct s3c2410_ts_mach_info *pdata = dev_get_platdata(&pdev->dev);
 	struct iio_dev *indio_dev = NULL;
-	bool has_ts = false;
 	int ret;
 	int irq;
 
 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(struct exynos_adc));
-	if (!indio_dev) {
-		dev_err(&pdev->dev, "failed allocating iio device\n");
+	if (!indio_dev)
 		return -ENOMEM;
-	}
 
 	info = iio_priv(indio_dev);
 
@@ -826,27 +584,10 @@ static int exynos_adc_probe(struct platform_device *pdev)
 		}
 	}
 
-	/* leave out any TS related code if unreachable */
-	if (IS_REACHABLE(CONFIG_INPUT)) {
-		has_ts = of_property_read_bool(pdev->dev.of_node,
-					       "has-touchscreen") || pdata;
-	}
-
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
 		return irq;
 	info->irq = irq;
-
-	if (has_ts) {
-		irq = platform_get_irq(pdev, 1);
-		if (irq == -EPROBE_DEFER)
-			return irq;
-
-		info->tsirq = irq;
-	} else {
-		info->tsirq = -1;
-	}
-
 	info->dev = &pdev->dev;
 
 	init_completion(&info->completion);
@@ -910,16 +651,6 @@ static int exynos_adc_probe(struct platform_device *pdev)
 	if (info->data->init_hw)
 		info->data->init_hw(info);
 
-	if (pdata)
-		info->delay = pdata->delay;
-	else
-		info->delay = 10000;
-
-	if (has_ts)
-		ret = exynos_adc_ts_init(info);
-	if (ret)
-		goto err_iio;
-
 	ret = of_platform_populate(np, exynos_adc_match, NULL, &indio_dev->dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed adding child nodes\n");
@@ -931,11 +662,6 @@ static int exynos_adc_probe(struct platform_device *pdev)
 err_of_populate:
 	device_for_each_child(&indio_dev->dev, NULL,
 				exynos_adc_remove_devices);
-	if (has_ts) {
-		input_unregister_device(info->input);
-		free_irq(info->tsirq, info);
-	}
-err_iio:
 	iio_device_unregister(indio_dev);
 err_irq:
 	free_irq(info->irq, info);
@@ -955,10 +681,6 @@ static void exynos_adc_remove(struct platform_device *pdev)
 	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
 	struct exynos_adc *info = iio_priv(indio_dev);
 
-	if (IS_REACHABLE(CONFIG_INPUT) && info->input) {
-		free_irq(info->tsirq, info);
-		input_unregister_device(info->input);
-	}
 	device_for_each_child(&indio_dev->dev, NULL,
 				exynos_adc_remove_devices);
 	iio_device_unregister(indio_dev);