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Commit a4164863 authored by Linus Walleij's avatar Linus Walleij Committed by Dmitry Torokhov
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Input: stmpe - enforce device tree only mode 



The STMPE keypad controller is only used with device tree configured
systems, so force the configuration to come from device tree only, and now
actually get the rows and cols from the device tree too.

Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Acked-by: default avatarLee Jones <lee.jones@linaro.org>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 80e1dd82

Documentation/devicetree/bindings/input/stmpe-keypad.txt

+2 −0
Original line number Diff line number Diff line
@@ -8,6 +8,8 @@ Optional properties: 
 - debounce-interval        : Debouncing interval time in milliseconds

 - st,scan-count            : Scanning cycles elapsed before key data is updated

 - st,no-autorepeat         : If specified device will not autorepeat

 - keypad,num-rows          : See ./matrix-keymap.txt

 - keypad,num-columns       : See ./matrix-keymap.txt



Example:

drivers/input/keyboard/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -559,6 +559,7 @@ config KEYBOARD_SH_KEYSC 
config KEYBOARD_STMPE

	tristate "STMPE keypad support"

	depends on MFD_STMPE

	depends on OF

	select INPUT_MATRIXKMAP

	help

	  Say Y here if you want to use the keypad controller on STMPE I/O

drivers/input/keyboard/stmpe-keypad.c

+45 −59
Original line number Diff line number Diff line
@@ -45,7 +45,7 @@ 
#define STMPE_KEYPAD_MAX_ROWS		8

#define STMPE_KEYPAD_MAX_COLS		8

#define STMPE_KEYPAD_ROW_SHIFT		3

#define STMPE_KEYPAD_KEYMAP_SIZE	\

#define STMPE_KEYPAD_KEYMAP_MAX_SIZE \

	(STMPE_KEYPAD_MAX_ROWS * STMPE_KEYPAD_MAX_COLS)



/**
@@ -99,16 +99,30 @@ static const struct stmpe_keypad_variant stmpe_keypad_variants[] = { 
	},

};



/**

 * struct stmpe_keypad - STMPE keypad state container

 * @stmpe: pointer to parent STMPE device

 * @input: spawned input device

 * @variant: STMPE variant

 * @debounce_ms: debounce interval, in ms.  Maximum is

 *		 %STMPE_KEYPAD_MAX_DEBOUNCE.

 * @scan_count: number of key scanning cycles to confirm key data.

 *		Maximum is %STMPE_KEYPAD_MAX_SCAN_COUNT.

 * @no_autorepeat: disable key autorepeat

 * @rows: bitmask for the rows

 * @cols: bitmask for the columns

 * @keymap: the keymap

 */

struct stmpe_keypad {

	struct stmpe *stmpe;

	struct input_dev *input;

	const struct stmpe_keypad_variant *variant;

	const struct stmpe_keypad_platform_data *plat;



	unsigned int debounce_ms;

	unsigned int scan_count;

	bool no_autorepeat;

	unsigned int rows;

	unsigned int cols;



	unsigned short keymap[STMPE_KEYPAD_KEYMAP_SIZE];

	unsigned short keymap[STMPE_KEYPAD_KEYMAP_MAX_SIZE];

};



static int stmpe_keypad_read_data(struct stmpe_keypad *keypad, u8 *data)
@@ -208,15 +222,14 @@ static int stmpe_keypad_altfunc_init(struct stmpe_keypad *keypad) 


static int stmpe_keypad_chip_init(struct stmpe_keypad *keypad)

{

	const struct stmpe_keypad_platform_data *plat = keypad->plat;

	const struct stmpe_keypad_variant *variant = keypad->variant;

	struct stmpe *stmpe = keypad->stmpe;

	int ret;



	if (plat->debounce_ms > STMPE_KEYPAD_MAX_DEBOUNCE)

	if (keypad->debounce_ms > STMPE_KEYPAD_MAX_DEBOUNCE)

		return -EINVAL;



	if (plat->scan_count > STMPE_KEYPAD_MAX_SCAN_COUNT)

	if (keypad->scan_count > STMPE_KEYPAD_MAX_SCAN_COUNT)

		return -EINVAL;



	ret = stmpe_enable(stmpe, STMPE_BLOCK_KEYPAD);
@@ -245,7 +258,7 @@ static int stmpe_keypad_chip_init(struct stmpe_keypad *keypad) 


	ret = stmpe_set_bits(stmpe, STMPE_KPC_CTRL_MSB,

			     STMPE_KPC_CTRL_MSB_SCAN_COUNT,

			     plat->scan_count << 4);

			     keypad->scan_count << 4);

	if (ret < 0)

		return ret;
@@ -253,15 +266,16 @@ static int stmpe_keypad_chip_init(struct stmpe_keypad *keypad) 
			      STMPE_KPC_CTRL_LSB_SCAN |

			      STMPE_KPC_CTRL_LSB_DEBOUNCE,

			      STMPE_KPC_CTRL_LSB_SCAN |

			      (plat->debounce_ms << 1));

			      (keypad->debounce_ms << 1));

}



static void stmpe_keypad_fill_used_pins(struct stmpe_keypad *keypad)

static void stmpe_keypad_fill_used_pins(struct stmpe_keypad *keypad,

					u32 used_rows, u32 used_cols)

{

	int row, col;



	for (row = 0; row < STMPE_KEYPAD_MAX_ROWS; row++) {

		for (col = 0; col < STMPE_KEYPAD_MAX_COLS; col++) {

	for (row = 0; row < used_rows; row++) {

		for (col = 0; col < used_cols; col++) {

			int code = MATRIX_SCAN_CODE(row, col,

						    STMPE_KEYPAD_ROW_SHIFT);

			if (keypad->keymap[code] != KEY_RESERVED) {
@@ -272,51 +286,17 @@ static void stmpe_keypad_fill_used_pins(struct stmpe_keypad *keypad) 
	}

}



#ifdef CONFIG_OF

static const struct stmpe_keypad_platform_data *

stmpe_keypad_of_probe(struct device *dev)

{

	struct device_node *np = dev->of_node;

	struct stmpe_keypad_platform_data *plat;



	if (!np)

		return ERR_PTR(-ENODEV);



	plat = devm_kzalloc(dev, sizeof(*plat), GFP_KERNEL);

	if (!plat)

		return ERR_PTR(-ENOMEM);



	of_property_read_u32(np, "debounce-interval", &plat->debounce_ms);

	of_property_read_u32(np, "st,scan-count", &plat->scan_count);



	plat->no_autorepeat = of_property_read_bool(np, "st,no-autorepeat");



	return plat;

}

#else

static inline const struct stmpe_keypad_platform_data *

stmpe_keypad_of_probe(struct device *dev)

{

	return ERR_PTR(-EINVAL);

}

#endif



static int stmpe_keypad_probe(struct platform_device *pdev)

{

	struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);

	const struct stmpe_keypad_platform_data *plat;

	struct device_node *np = pdev->dev.of_node;

	struct stmpe_keypad *keypad;

	struct input_dev *input;

	u32 rows;

	u32 cols;

	int error;

	int irq;



	plat = stmpe->pdata->keypad;

	if (!plat) {

		plat = stmpe_keypad_of_probe(&pdev->dev);

		if (IS_ERR(plat))

			return PTR_ERR(plat);

	}



	irq = platform_get_irq(pdev, 0);

	if (irq < 0)

		return irq;
@@ -326,6 +306,13 @@ static int stmpe_keypad_probe(struct platform_device *pdev) 
	if (!keypad)

		return -ENOMEM;



	keypad->stmpe = stmpe;

	keypad->variant = &stmpe_keypad_variants[stmpe->partnum];



	of_property_read_u32(np, "debounce-interval", &keypad->debounce_ms);

	of_property_read_u32(np, "st,scan-count", &keypad->scan_count);

	keypad->no_autorepeat = of_property_read_bool(np, "st,no-autorepeat");



	input = devm_input_allocate_device(&pdev->dev);

	if (!input)

		return -ENOMEM;
@@ -334,23 +321,22 @@ static int stmpe_keypad_probe(struct platform_device *pdev) 
	input->id.bustype = BUS_I2C;

	input->dev.parent = &pdev->dev;



	error = matrix_keypad_build_keymap(plat->keymap_data, NULL,

					   STMPE_KEYPAD_MAX_ROWS,

					   STMPE_KEYPAD_MAX_COLS,

	error = matrix_keypad_parse_of_params(&pdev->dev, &rows, &cols);

	if (error)

		return error;



	error = matrix_keypad_build_keymap(NULL, NULL, rows, cols,

					   keypad->keymap, input);

	if (error)

		return error;



	input_set_capability(input, EV_MSC, MSC_SCAN);

	if (!plat->no_autorepeat)

	if (!keypad->no_autorepeat)

		__set_bit(EV_REP, input->evbit);



	stmpe_keypad_fill_used_pins(keypad);

	stmpe_keypad_fill_used_pins(keypad, rows, cols);



	keypad->stmpe = stmpe;

	keypad->plat = plat;

	keypad->input = input;

	keypad->variant = &stmpe_keypad_variants[stmpe->partnum];



	error = stmpe_keypad_chip_init(keypad);

	if (error < 0)

include/linux/mfd/stmpe.h

+0 −20
Original line number Diff line number Diff line
@@ -115,24 +115,6 @@ extern int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins, 
extern int stmpe_enable(struct stmpe *stmpe, unsigned int blocks);

extern int stmpe_disable(struct stmpe *stmpe, unsigned int blocks);



struct matrix_keymap_data;



/**

 * struct stmpe_keypad_platform_data - STMPE keypad platform data

 * @keymap_data: key map table and size

 * @debounce_ms: debounce interval, in ms.  Maximum is

 *		 %STMPE_KEYPAD_MAX_DEBOUNCE.

 * @scan_count: number of key scanning cycles to confirm key data.

 *		Maximum is %STMPE_KEYPAD_MAX_SCAN_COUNT.

 * @no_autorepeat: disable key autorepeat

 */

struct stmpe_keypad_platform_data {

	const struct matrix_keymap_data *keymap_data;

	unsigned int debounce_ms;

	unsigned int scan_count;

	bool no_autorepeat;

};



#define STMPE_GPIO_NOREQ_811_TOUCH	(0xf0)



/**
@@ -201,7 +183,6 @@ struct stmpe_ts_platform_data { 
 * @irq_gpio: gpio number over which irq will be requested (significant only if

 *	      irq_over_gpio is true)

 * @gpio: GPIO-specific platform data

 * @keypad: keypad-specific platform data

 * @ts: touchscreen-specific platform data

 */

struct stmpe_platform_data {
@@ -214,7 +195,6 @@ struct stmpe_platform_data { 
	int autosleep_timeout;



	struct stmpe_gpio_platform_data *gpio;

	struct stmpe_keypad_platform_data *keypad;

	struct stmpe_ts_platform_data *ts;

};