Merge branch 'ib-array-bitmaps' into devel

Documentation/driver-api/gpio/board.rst

@@ -193,3 +193,18 @@ And the table can be added to the board code as follows::
 
 The line will be hogged as soon as the gpiochip is created or - in case the
 chip was created earlier - when the hog table is registered.
+
+Arrays of pins
+--------------
+In addition to requesting pins belonging to a function one by one, a device may
+also request an array of pins assigned to the function.  The way those pins are
+mapped to the device determines if the array qualifies for fast bitmap
+processing.  If yes, a bitmap is passed over get/set array functions directly
+between a caller and a respective .get/set_multiple() callback of a GPIO chip.
+
+In order to qualify for fast bitmap processing, the pin mapping must meet the
+following requirements:
+- it must belong to the same chip as other 'fast' pins of the function,
+- its index within the function must match its hardware number within the chip.
+
+Open drain and open source pins are excluded from fast bitmap output processing.

Documentation/driver-api/gpio/consumer.rst

@@ -109,9 +109,11 @@ For a function using multiple GPIOs all of those can be obtained with one call::
 					   enum gpiod_flags flags)
 
 This function returns a struct gpio_descs which contains an array of
-descriptors::
+descriptors.  It also contains a pointer to a gpiolib private structure which,
+if passed back to get/set array functions, may speed up I/O proocessing::
 
 	struct gpio_descs {
+		struct gpio_array *info;
 		unsigned int ndescs;
 		struct gpio_desc *desc[];
 	}
@@ -323,29 +325,37 @@ The following functions get or set the values of an array of GPIOs::
 
 	int gpiod_get_array_value(unsigned int array_size,
 				  struct gpio_desc **desc_array,
-				  int *value_array);
+				  struct gpio_array *array_info,
+				  unsigned long *value_bitmap);
 	int gpiod_get_raw_array_value(unsigned int array_size,
 				      struct gpio_desc **desc_array,
-				      int *value_array);
+				      struct gpio_array *array_info,
+				      unsigned long *value_bitmap);
 	int gpiod_get_array_value_cansleep(unsigned int array_size,
 					   struct gpio_desc **desc_array,
-					   int *value_array);
+					   struct gpio_array *array_info,
+					   unsigned long *value_bitmap);
 	int gpiod_get_raw_array_value_cansleep(unsigned int array_size,
 					   struct gpio_desc **desc_array,
-					   int *value_array);
+					   struct gpio_array *array_info,
+					   unsigned long *value_bitmap);
 
 	void gpiod_set_array_value(unsigned int array_size,
 				   struct gpio_desc **desc_array,
-				   int *value_array)
+				   struct gpio_array *array_info,
+				   unsigned long *value_bitmap)
 	void gpiod_set_raw_array_value(unsigned int array_size,
 				       struct gpio_desc **desc_array,
-				       int *value_array)
+				       struct gpio_array *array_info,
+				       unsigned long *value_bitmap)
 	void gpiod_set_array_value_cansleep(unsigned int array_size,
 					    struct gpio_desc **desc_array,
-					    int *value_array)
+					    struct gpio_array *array_info,
+					    unsigned long *value_bitmap)
 	void gpiod_set_raw_array_value_cansleep(unsigned int array_size,
 						struct gpio_desc **desc_array,
-						int *value_array)
+						struct gpio_array *array_info,
+						unsigned long *value_bitmap)
 
 The array can be an arbitrary set of GPIOs. The functions will try to access
 GPIOs belonging to the same bank or chip simultaneously if supported by the
@@ -356,8 +366,9 @@ accessed sequentially.
 The functions take three arguments:
 	* array_size	- the number of array elements
 	* desc_array	- an array of GPIO descriptors
-	* value_array	- an array to store the GPIOs' values (get) or
-			  an array of values to assign to the GPIOs (set)
+	* array_info	- optional information obtained from gpiod_array_get()
+	* value_bitmap	- a bitmap to store the GPIOs' values (get) or
+			  a bitmap of values to assign to the GPIOs (set)
 
 The descriptor array can be obtained using the gpiod_get_array() function
 or one of its variants. If the group of descriptors returned by that function
@@ -366,16 +377,25 @@ the struct gpio_descs returned by gpiod_get_array()::
 
 	struct gpio_descs *my_gpio_descs = gpiod_get_array(...);
 	gpiod_set_array_value(my_gpio_descs->ndescs, my_gpio_descs->desc,
-			      my_gpio_values);
+			      my_gpio_descs->info, my_gpio_value_bitmap);
 
 It is also possible to access a completely arbitrary array of descriptors. The
 descriptors may be obtained using any combination of gpiod_get() and
 gpiod_get_array(). Afterwards the array of descriptors has to be setup
-manually before it can be passed to one of the above functions.
+manually before it can be passed to one of the above functions.  In that case,
+array_info should be set to NULL.
 
 Note that for optimal performance GPIOs belonging to the same chip should be
 contiguous within the array of descriptors.
 
+Still better performance may be achieved if array indexes of the descriptors
+match hardware pin numbers of a single chip.  If an array passed to a get/set
+array function matches the one obtained from gpiod_get_array() and array_info
+associated with the array is also passed, the function may take a fast bitmap
+processing path, passing the value_bitmap argument directly to the respective
+.get/set_multiple() callback of the chip.  That allows for utilization of GPIO
+banks as data I/O ports without much loss of performance.
+
 The return value of gpiod_get_array_value() and its variants is 0 on success
 or negative on error. Note the difference to gpiod_get_value(), which returns
 0 or 1 on success to convey the GPIO value. With the array functions, the GPIO

drivers/auxdisplay/hd44780.c

@@ -62,20 +62,15 @@ static void hd44780_strobe_gpio(struct hd44780 *hd)
 /* write to an LCD panel register in 8 bit GPIO mode */
 static void hd44780_write_gpio8(struct hd44780 *hd, u8 val, unsigned int rs)
 {
-	int values[10];	/* for DATA[0-7], RS, RW */
-	unsigned int i, n;
-
-	for (i = 0; i < 8; i++)
-		values[PIN_DATA0 + i] = !!(val & BIT(i));
-	values[PIN_CTRL_RS] = rs;
-	n = 9;
-	if (hd->pins[PIN_CTRL_RW]) {
-		values[PIN_CTRL_RW] = 0;
-		n++;
-	}
+	DECLARE_BITMAP(values, 10); /* for DATA[0-7], RS, RW */
+	unsigned int n;
+
+	values[0] = val;
+	__assign_bit(8, values, rs);
+	n = hd->pins[PIN_CTRL_RW] ? 10 : 9;
 
 	/* Present the data to the port */
-	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA0], values);
+	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA0], NULL, values);
 
 	hd44780_strobe_gpio(hd);
 }
@@ -83,32 +78,25 @@ static void hd44780_write_gpio8(struct hd44780 *hd, u8 val, unsigned int rs)
 /* write to an LCD panel register in 4 bit GPIO mode */
 static void hd44780_write_gpio4(struct hd44780 *hd, u8 val, unsigned int rs)
 {
-	int values[10];	/* for DATA[0-7], RS, RW, but DATA[0-3] is unused */
-	unsigned int i, n;
+	DECLARE_BITMAP(values, 6); /* for DATA[4-7], RS, RW */
+	unsigned int n;
 
 	/* High nibble + RS, RW */
-	for (i = 4; i < 8; i++)
-		values[PIN_DATA0 + i] = !!(val & BIT(i));
-	values[PIN_CTRL_RS] = rs;
-	n = 5;
-	if (hd->pins[PIN_CTRL_RW]) {
-		values[PIN_CTRL_RW] = 0;
-		n++;
-	}
+	values[0] = val >> 4;
+	__assign_bit(4, values, rs);
+	n = hd->pins[PIN_CTRL_RW] ? 6 : 5;
 
 	/* Present the data to the port */
-	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4],
-				       &values[PIN_DATA4]);
+	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4], NULL, values);
 
 	hd44780_strobe_gpio(hd);
 
 	/* Low nibble */
-	for (i = 0; i < 4; i++)
-		values[PIN_DATA4 + i] = !!(val & BIT(i));
+	values[0] &= ~0x0fUL;
+	values[0] |= val & 0x0f;
 
 	/* Present the data to the port */
-	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4],
-				       &values[PIN_DATA4]);
+	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4], NULL, values);
 
 	hd44780_strobe_gpio(hd);
 }
@@ -155,23 +143,16 @@ static void hd44780_write_cmd_gpio4(struct charlcd *lcd, int cmd)
 /* Send 4-bits of a command to the LCD panel in raw 4 bit GPIO mode */
 static void hd44780_write_cmd_raw_gpio4(struct charlcd *lcd, int cmd)
 {
-	int values[10];	/* for DATA[0-7], RS, RW, but DATA[0-3] is unused */
+	DECLARE_BITMAP(values, 6); /* for DATA[4-7], RS, RW */
 	struct hd44780 *hd = lcd->drvdata;
-	unsigned int i, n;
+	unsigned int n;
 
 	/* Command nibble + RS, RW */
-	for (i = 0; i < 4; i++)
-		values[PIN_DATA4 + i] = !!(cmd & BIT(i));
-	values[PIN_CTRL_RS] = 0;
-	n = 5;
-	if (hd->pins[PIN_CTRL_RW]) {
-		values[PIN_CTRL_RW] = 0;
-		n++;
-	}
+	values[0] = cmd & 0x0f;
+	n = hd->pins[PIN_CTRL_RW] ? 6 : 5;
 
 	/* Present the data to the port */
-	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4],
-				       &values[PIN_DATA4]);
+	gpiod_set_array_value_cansleep(n, &hd->pins[PIN_DATA4], NULL, values);
 
 	hd44780_strobe_gpio(hd);
 }

drivers/bus/ts-nbus.c

@@ -110,13 +110,12 @@ static void ts_nbus_set_direction(struct ts_nbus *ts_nbus, int direction)
  */
 static void ts_nbus_reset_bus(struct ts_nbus *ts_nbus)
 {
-	int i;
-	int values[8];
+	DECLARE_BITMAP(values, 8);
 
-	for (i = 0; i < 8; i++)
-		values[i] = 0;
+	values[0] = 0;
 
-	gpiod_set_array_value_cansleep(8, ts_nbus->data->desc, values);
+	gpiod_set_array_value_cansleep(8, ts_nbus->data->desc,
+				       ts_nbus->data->info, values);
 	gpiod_set_value_cansleep(ts_nbus->csn, 0);
 	gpiod_set_value_cansleep(ts_nbus->strobe, 0);
 	gpiod_set_value_cansleep(ts_nbus->ale, 0);
@@ -157,16 +156,11 @@ static int ts_nbus_read_byte(struct ts_nbus *ts_nbus, u8 *val)
 static void ts_nbus_write_byte(struct ts_nbus *ts_nbus, u8 byte)
 {
 	struct gpio_descs *gpios = ts_nbus->data;
-	int i;
-	int values[8];
+	DECLARE_BITMAP(values, 8);
 
-	for (i = 0; i < 8; i++)
-		if (byte & BIT(i))
-			values[i] = 1;
-		else
-			values[i] = 0;
+	values[0] = byte;
 
-	gpiod_set_array_value_cansleep(8, gpios->desc, values);
+	gpiod_set_array_value_cansleep(8, gpios->desc, gpios->info, values);
 }
 
 /*

drivers/gpio/gpio-max3191x.c

@@ -313,18 +313,21 @@ static int max3191x_set_config(struct gpio_chip *gpio, unsigned int offset,
 
 static void gpiod_set_array_single_value_cansleep(unsigned int ndescs,
 						  struct gpio_desc **desc,
+						  struct gpio_array *info,
 						  int value)
 {
-	int i, *values;
+	unsigned long *values;
 
-	values = kmalloc_array(ndescs, sizeof(*values), GFP_KERNEL);
+	values = bitmap_alloc(ndescs, GFP_KERNEL);
 	if (!values)
 		return;
 
-	for (i = 0; i < ndescs; i++)
-		values[i] = value;
+	if (value)
+		bitmap_fill(values, ndescs);
+	else
+		bitmap_zero(values, ndescs);
 
-	gpiod_set_array_value_cansleep(ndescs, desc, values);
+	gpiod_set_array_value_cansleep(ndescs, desc, info, values);
 	kfree(values);
 }
 
@@ -397,7 +400,8 @@ static int max3191x_probe(struct spi_device *spi)
 	if (max3191x->modesel_pins)
 		gpiod_set_array_single_value_cansleep(
 				 max3191x->modesel_pins->ndescs,
-				 max3191x->modesel_pins->desc, max3191x->mode);
+				 max3191x->modesel_pins->desc,
+				 max3191x->modesel_pins->info, max3191x->mode);
 
 	max3191x->ignore_uv = device_property_read_bool(dev,
 						  "maxim,ignore-undervoltage");

drivers/gpio/gpiolib.h

@@ -183,15 +183,26 @@ static inline bool acpi_can_fallback_to_crs(struct acpi_device *adev,
 }
 #endif
 
+struct gpio_array {
+	struct gpio_desc	**desc;
+	unsigned int		size;
+	struct gpio_chip	*chip;
+	unsigned long		*get_mask;
+	unsigned long		*set_mask;
+	unsigned long		invert_mask[];
+};
+
 struct gpio_desc *gpiochip_get_desc(struct gpio_chip *chip, u16 hwnum);
 int gpiod_get_array_value_complex(bool raw, bool can_sleep,
 				  unsigned int array_size,
 				  struct gpio_desc **desc_array,
-				  int *value_array);
+				  struct gpio_array *array_info,
+				  unsigned long *value_bitmap);
 int gpiod_set_array_value_complex(bool raw, bool can_sleep,
 				   unsigned int array_size,
 				   struct gpio_desc **desc_array,
-				   int *value_array);
+				   struct gpio_array *array_info,
+				   unsigned long *value_bitmap);
 
 /* This is just passed between gpiolib and devres */
 struct gpio_desc *gpiod_get_from_of_node(struct device_node *node,

drivers/i2c/muxes/i2c-mux-gpio.c

@@ -22,18 +22,16 @@ struct gpiomux {
 	struct i2c_mux_gpio_platform_data data;
 	unsigned gpio_base;
 	struct gpio_desc **gpios;
-	int *values;
 };
 
 static void i2c_mux_gpio_set(const struct gpiomux *mux, unsigned val)
 {
-	int i;
+	DECLARE_BITMAP(values, BITS_PER_TYPE(val));
 
-	for (i = 0; i < mux->data.n_gpios; i++)
-		mux->values[i] = (val >> i) & 1;
+	values[0] = val;
 
-	gpiod_set_array_value_cansleep(mux->data.n_gpios,
-				       mux->gpios, mux->values);
+	gpiod_set_array_value_cansleep(mux->data.n_gpios, mux->gpios, NULL,
+				       values);
 }
 
 static int i2c_mux_gpio_select(struct i2c_mux_core *muxc, u32 chan)
@@ -182,15 +180,13 @@ static int i2c_mux_gpio_probe(struct platform_device *pdev)
 		return -EPROBE_DEFER;
 
 	muxc = i2c_mux_alloc(parent, &pdev->dev, mux->data.n_values,
-			     mux->data.n_gpios * sizeof(*mux->gpios) +
-			     mux->data.n_gpios * sizeof(*mux->values), 0,
+			     mux->data.n_gpios * sizeof(*mux->gpios), 0,
 			     i2c_mux_gpio_select, NULL);
 	if (!muxc) {
 		ret = -ENOMEM;
 		goto alloc_failed;
 	}
 	mux->gpios = muxc->priv;
-	mux->values = (int *)(mux->gpios + mux->data.n_gpios);
 	muxc->priv = mux;
 
 	platform_set_drvdata(pdev, muxc);

drivers/mmc/core/pwrseq_simple.c

@@ -40,18 +40,13 @@ static void mmc_pwrseq_simple_set_gpios_value(struct mmc_pwrseq_simple *pwrseq,
 	struct gpio_descs *reset_gpios = pwrseq->reset_gpios;
 
 	if (!IS_ERR(reset_gpios)) {
-		int i, *values;
+		DECLARE_BITMAP(values, BITS_PER_TYPE(value));
 		int nvalues = reset_gpios->ndescs;
 
-		values = kmalloc_array(nvalues, sizeof(int), GFP_KERNEL);
-		if (!values)
-			return;
+		values[0] = value;
 
-		for (i = 0; i < nvalues; i++)
-			values[i] = value;
-
-		gpiod_set_array_value_cansleep(nvalues, reset_gpios->desc, values);
-		kfree(values);
+		gpiod_set_array_value_cansleep(nvalues, reset_gpios->desc,
+					       reset_gpios->info, values);
 	}
 }
 

drivers/mux/gpio.c

@@ -17,20 +17,18 @@
 
 struct mux_gpio {
 	struct gpio_descs *gpios;
-	int *val;
 };
 
 static int mux_gpio_set(struct mux_control *mux, int state)
 {
 	struct mux_gpio *mux_gpio = mux_chip_priv(mux->chip);
-	int i;
+	DECLARE_BITMAP(values, BITS_PER_TYPE(state));
 
-	for (i = 0; i < mux_gpio->gpios->ndescs; i++)
-		mux_gpio->val[i] = (state >> i) & 1;
+	values[0] = state;
 
 	gpiod_set_array_value_cansleep(mux_gpio->gpios->ndescs,
 				       mux_gpio->gpios->desc,
-				       mux_gpio->val);
+				       mux_gpio->gpios->info, values);
 
 	return 0;
 }
@@ -58,13 +56,11 @@ static int mux_gpio_probe(struct platform_device *pdev)
 	if (pins < 0)
 		return pins;
 
-	mux_chip = devm_mux_chip_alloc(dev, 1, sizeof(*mux_gpio) +
-				       pins * sizeof(*mux_gpio->val));
+	mux_chip = devm_mux_chip_alloc(dev, 1, sizeof(*mux_gpio));
 	if (IS_ERR(mux_chip))
 		return PTR_ERR(mux_chip);
 
 	mux_gpio = mux_chip_priv(mux_chip);
-	mux_gpio->val = (int *)(mux_gpio + 1);
 	mux_chip->ops = &mux_gpio_ops;
 
 	mux_gpio->gpios = devm_gpiod_get_array(dev, "mux", GPIOD_OUT_LOW);

drivers/net/phy/mdio-mux-gpio.c

@@ -20,23 +20,21 @@
 struct mdio_mux_gpio_state {
 	struct gpio_descs *gpios;
 	void *mux_handle;
-	int values[];
 };
 
 static int mdio_mux_gpio_switch_fn(int current_child, int desired_child,
 				   void *data)
 {
 	struct mdio_mux_gpio_state *s = data;
-	unsigned int n;
+	DECLARE_BITMAP(values, BITS_PER_TYPE(desired_child));
 
 	if (current_child == desired_child)
 		return 0;
 
-	for (n = 0; n < s->gpios->ndescs; n++)
-		s->values[n] = (desired_child >> n) & 1;
+	values[0] = desired_child;
 
 	gpiod_set_array_value_cansleep(s->gpios->ndescs, s->gpios->desc,
-				       s->values);
+				       s->gpios->info, values);
 
 	return 0;
 }
@@ -51,8 +49,7 @@ static int mdio_mux_gpio_probe(struct platform_device *pdev)
 	if (IS_ERR(gpios))
 		return PTR_ERR(gpios);
 
-	s = devm_kzalloc(&pdev->dev, struct_size(s, values, gpios->ndescs),
-			 GFP_KERNEL);
+	s = devm_kzalloc(&pdev->dev, sizeof(*s), GFP_KERNEL);
 	if (!s) {
 		gpiod_put_array(gpios);
 		return -ENOMEM;

drivers/pcmcia/soc_common.c

@@ -351,19 +351,20 @@ static int soc_common_pcmcia_config_skt(
 
 	if (ret == 0) {
 		struct gpio_desc *descs[2];
-		int values[2], n = 0;
+		DECLARE_BITMAP(values, 2);
+		int n = 0;
 
 		if (skt->gpio_reset) {
 			descs[n] = skt->gpio_reset;
-			values[n++] = !!(state->flags & SS_RESET);
+			__assign_bit(n++, values, state->flags & SS_RESET);
 		}
 		if (skt->gpio_bus_enable) {
 			descs[n] = skt->gpio_bus_enable;
-			values[n++] = !!(state->flags & SS_OUTPUT_ENA);
+			__assign_bit(n++, values, state->flags & SS_OUTPUT_ENA);
 		}
 
 		if (n)
-			gpiod_set_array_value_cansleep(n, descs, values);
+			gpiod_set_array_value_cansleep(n, descs, NULL, values);
 
 		/*
 		 * This really needs a better solution.  The IRQ

drivers/phy/motorola/phy-mapphone-mdm6600.c

@@ -157,15 +157,13 @@ static const struct phy_ops gpio_usb_ops = {
  */
 static void phy_mdm6600_cmd(struct phy_mdm6600 *ddata, int val)
 {
-	int values[PHY_MDM6600_NR_CMD_LINES];
-	int i;
+	DECLARE_BITMAP(values, PHY_MDM6600_NR_CMD_LINES);
 
-	val &= (1 << PHY_MDM6600_NR_CMD_LINES) - 1;
-	for (i = 0; i < PHY_MDM6600_NR_CMD_LINES; i++)
-		values[i] = (val & BIT(i)) >> i;
+	values[0] = val;
 
 	gpiod_set_array_value_cansleep(PHY_MDM6600_NR_CMD_LINES,
-				       ddata->cmd_gpios->desc, values);
+				       ddata->cmd_gpios->desc,
+				       ddata->cmd_gpios->info, values);
 }
 
 /**
@@ -176,7 +174,7 @@ static void phy_mdm6600_status(struct work_struct *work)
 {
 	struct phy_mdm6600 *ddata;
 	struct device *dev;
-	int values[PHY_MDM6600_NR_STATUS_LINES];
+	DECLARE_BITMAP(values, PHY_MDM6600_NR_STATUS_LINES);
 	int error, i, val = 0;
 
 	ddata = container_of(work, struct phy_mdm6600, status_work.work);
@@ -184,16 +182,17 @@ static void phy_mdm6600_status(struct work_struct *work)
 
 	error = gpiod_get_array_value_cansleep(PHY_MDM6600_NR_STATUS_LINES,
 					       ddata->status_gpios->desc,
+					       ddata->status_gpios->info,
 					       values);
 	if (error)
 		return;
 
 	for (i = 0; i < PHY_MDM6600_NR_STATUS_LINES; i++) {
-		val |= values[i] << i;
+		val |= test_bit(i, values) << i;
 		dev_dbg(ddata->dev, "XXX %s: i: %i values[i]: %i val: %i\n",
-			__func__, i, values[i], val);
+			__func__, i, test_bit(i, values), val);
 	}
-	ddata->status = val;
+	ddata->status = values[0];
 
 	dev_info(dev, "modem status: %i %s\n",
 		 ddata->status,

drivers/staging/iio/adc/ad7606.c

@@ -202,7 +202,7 @@ static int ad7606_write_raw(struct iio_dev *indio_dev,
 			    long mask)
 {
 	struct ad7606_state *st = iio_priv(indio_dev);
-	int values[3];
+	DECLARE_BITMAP(values, 3);
 	int ret, i;
 
 	switch (mask) {
@@ -227,12 +227,10 @@ static int ad7606_write_raw(struct iio_dev *indio_dev,
 		if (ret < 0)
 			return ret;
 
-		values[0] = (ret >> 0) & 1;
-		values[1] = (ret >> 1) & 1;
-		values[2] = (ret >> 2) & 1;
+		values[0] = ret;
 
 		mutex_lock(&st->lock);
-		gpiod_set_array_value(ARRAY_SIZE(values), st->gpio_os->desc,
+		gpiod_set_array_value(3, st->gpio_os->desc, st->gpio_os->info,
 				      values);
 		st->oversampling = val;
 		mutex_unlock(&st->lock);

drivers/tty/serial/serial_mctrl_gpio.c

@@ -40,7 +40,7 @@ void mctrl_gpio_set(struct mctrl_gpios *gpios, unsigned int mctrl)
 {
 	enum mctrl_gpio_idx i;
 	struct gpio_desc *desc_array[UART_GPIO_MAX];
-	int value_array[UART_GPIO_MAX];
+	DECLARE_BITMAP(values, UART_GPIO_MAX);
 	unsigned int count = 0;
 
 	if (gpios == NULL)
@@ -49,10 +49,11 @@ void mctrl_gpio_set(struct mctrl_gpios *gpios, unsigned int mctrl)
 	for (i = 0; i < UART_GPIO_MAX; i++)
 		if (gpios->gpio[i] && mctrl_gpios_desc[i].dir_out) {
 			desc_array[count] = gpios->gpio[i];
-			value_array[count] = !!(mctrl & mctrl_gpios_desc[i].mctrl);
+			__assign_bit(count, values,
+				     mctrl & mctrl_gpios_desc[i].mctrl);
 			count++;
 		}
-	gpiod_set_array_value(count, desc_array, value_array);
+	gpiod_set_array_value(count, desc_array, NULL, values);
 }
 EXPORT_SYMBOL_GPL(mctrl_gpio_set);
 

include/linux/gpio/consumer.h

@@ -17,11 +17,20 @@ struct device;
  */
 struct gpio_desc;
 
+/**
+ * Opaque descriptor for a structure of GPIO array attributes.  This structure
+ * is attached to struct gpiod_descs obtained from gpiod_get_array() and can be
+ * passed back to get/set array functions in order to activate fast processing
+ * path if applicable.
+ */
+struct gpio_array;
+
 /**
  * Struct containing an array of descriptors that can be obtained using
  * gpiod_get_array().
  */
 struct gpio_descs {
+	struct gpio_array *info;
 	unsigned int ndescs;
 	struct gpio_desc *desc[];
 };
@@ -104,36 +113,46 @@ int gpiod_direction_output_raw(struct gpio_desc *desc, int value);
 /* Value get/set from non-sleeping context */
 int gpiod_get_value(const struct gpio_desc *desc);
 int gpiod_get_array_value(unsigned int array_size,
-			  struct gpio_desc **desc_array, int *value_array);
+			  struct gpio_desc **desc_array,
+			  struct gpio_array *array_info,
+			  unsigned long *value_bitmap);
 void gpiod_set_value(struct gpio_desc *desc, int value);
 void gpiod_set_array_value(unsigned int array_size,
-			   struct gpio_desc **desc_array, int *value_array);
+			   struct gpio_desc **desc_array,
+			   struct gpio_array *array_info,
+			   unsigned long *value_bitmap);
 int gpiod_get_raw_value(const struct gpio_desc *desc);
 int gpiod_get_raw_array_value(unsigned int array_size,
 			      struct gpio_desc **desc_array,
-			      int *value_array);
+			      struct gpio_array *array_info,
+			      unsigned long *value_bitmap);
 void gpiod_set_raw_value(struct gpio_desc *desc, int value);
 int gpiod_set_raw_array_value(unsigned int array_size,
 			       struct gpio_desc **desc_array,
-			       int *value_array);
+			       struct gpio_array *array_info,
+			       unsigned long *value_bitmap);
 
 /* Value get/set from sleeping context */
 int gpiod_get_value_cansleep(const struct gpio_desc *desc);
 int gpiod_get_array_value_cansleep(unsigned int array_size,
 				   struct gpio_desc **desc_array,
-				   int *value_array);
+				   struct gpio_array *array_info,
+				   unsigned long *value_bitmap);
 void gpiod_set_value_cansleep(struct gpio_desc *desc, int value);
 void gpiod_set_array_value_cansleep(unsigned int array_size,
 				    struct gpio_desc **desc_array,
-				    int *value_array);
+				    struct gpio_array *array_info,
+				    unsigned long *value_bitmap);
 int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc);
 int gpiod_get_raw_array_value_cansleep(unsigned int array_size,
 				       struct gpio_desc **desc_array,
-				       int *value_array);
+				       struct gpio_array *array_info,
+				       unsigned long *value_bitmap);
 void gpiod_set_raw_value_cansleep(struct gpio_desc *desc, int value);
 int gpiod_set_raw_array_value_cansleep(unsigned int array_size,
 					struct gpio_desc **desc_array,
-					int *value_array);
+					struct gpio_array *array_info,
+					unsigned long *value_bitmap);
 
 int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce);
 int gpiod_set_transitory(struct gpio_desc *desc, bool transitory);
@@ -330,7 +349,8 @@ static inline int gpiod_get_value(const struct gpio_desc *desc)
 }
 static inline int gpiod_get_array_value(unsigned int array_size,
 					struct gpio_desc **desc_array,
-					int *value_array)
+					struct gpio_array *array_info,
+					unsigned long *value_bitmap)
 {
 	/* GPIO can never have been requested */
 	WARN_ON(1);
@@ -343,7 +363,8 @@ static inline void gpiod_set_value(struct gpio_desc *desc, int value)
 }
 static inline void gpiod_set_array_value(unsigned int array_size,
 					 struct gpio_desc **desc_array,
-					 int *value_array)
+					 struct gpio_array *array_info,
+					 unsigned long *value_bitmap)
 {
 	/* GPIO can never have been requested */
 	WARN_ON(1);
@@ -356,7 +377,8 @@ static inline int gpiod_get_raw_value(const struct gpio_desc *desc)
 }
 static inline int gpiod_get_raw_array_value(unsigned int array_size,
 					    struct gpio_desc **desc_array,
-					    int *value_array)
+					    struct gpio_array *array_info,
+					    unsigned long *value_bitmap)
 {
 	/* GPIO can never have been requested */
 	WARN_ON(1);
@@ -369,7 +391,8 @@ static inline void gpiod_set_raw_value(struct gpio_desc *desc, int value)
 }
 static inline int gpiod_set_raw_array_value(unsigned int array_size,
 					     struct gpio_desc **desc_array,
-					     int *value_array)
+					     struct gpio_array *array_info,
+					     unsigned long *value_bitmap)
 {
 	/* GPIO can never have been requested */
 	WARN_ON(1);
@@ -384,7 +407,8 @@ static inline int gpiod_get_value_cansleep(const struct gpio_desc *desc)
 }
 static inline int gpiod_get_array_value_cansleep(unsigned int array_size,
 				     struct gpio_desc **desc_array,
-				     int *value_array)
+				     struct gpio_array *array_info,
+				     unsigned long *value_bitmap)
 {
 	/* GPIO can never have been requested */
 	WARN_ON(1);
@@ -397,7 +421,8 @@ static inline void gpiod_set_value_cansleep(struct gpio_desc *desc, int value)
 }
 static inline void gpiod_set_array_value_cansleep(unsigned int array_size,
 					    struct gpio_desc **desc_array,
-					    int *value_array)
+					    struct gpio_array *array_info,
+					    unsigned long *value_bitmap)
 {
 	/* GPIO can never have been requested */
 	WARN_ON(1);
@@ -410,7 +435,8 @@ static inline int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc)
 }
 static inline int gpiod_get_raw_array_value_cansleep(unsigned int array_size,
 					       struct gpio_desc **desc_array,
-					       int *value_array)
+					       struct gpio_array *array_info,
+					       unsigned long *value_bitmap)
 {
 	/* GPIO can never have been requested */
 	WARN_ON(1);
@@ -424,7 +450,8 @@ static inline void gpiod_set_raw_value_cansleep(struct gpio_desc *desc,
 }
 static inline int gpiod_set_raw_array_value_cansleep(unsigned int array_size,
 						struct gpio_desc **desc_array,
-						int *value_array)
+						struct gpio_array *array_info,
+						unsigned long *value_bitmap)
 {
 	/* GPIO can never have been requested */
 	WARN_ON(1);