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Commit bb29b9cc authored by Anders Darander's avatar Anders Darander Committed by Jacek Anaszewski
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leds: pca963x: Add bindings to invert polarity 



Add a new DT property, nxp,inverted-out, to invert the polarity
of the output.

Tested on PCA9634.

Signed-off-by: default avatarAnders Darander <anders@chargestorm.se>
Acked-by: default avatarPavel Machek <pavel@ucw.cz>
Signed-off-by: default avatarJacek Anaszewski <jacek.anaszewski@gmail.com>
parent 2ea659a9

Documentation/devicetree/bindings/leds/pca963x.txt

+1 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ Optional properties: 
- nxp,period-scale : In some configurations, the chip blinks faster than expected.

		     This parameter provides a scaling ratio (fixed point, decimal divided

		     by 1000) to compensate, e.g. 1300=1.3x and 750=0.75x.

- nxp,inverted-out: invert the polarity of the generated PWM



Each led is represented as a sub-node of the nxp,pca963x device.

drivers/leds/leds-pca963x.c

+15 −2
Original line number Diff line number Diff line
@@ -342,6 +342,12 @@ pca963x_dt_init(struct i2c_client *client, struct pca963x_chipdef *chip) 
	if (of_property_read_u32(np, "nxp,period-scale", &chip->scaling))

		chip->scaling = 1000;



	/* default to non-inverted output, unless inverted is specified */

	if (of_property_read_bool(np, "nxp,inverted-out"))

		pdata->dir = PCA963X_INVERTED;

	else

		pdata->dir = PCA963X_NORMAL;



	return pdata;

}
@@ -452,11 +458,18 @@ static int pca963x_probe(struct i2c_client *client, 
	i2c_smbus_write_byte_data(client, PCA963X_MODE1, BIT(4));



	if (pdata) {

		u8 mode2 = i2c_smbus_read_byte_data(pca963x->chip->client,

						    PCA963X_MODE2);

		/* Configure output: open-drain or totem pole (push-pull) */

		if (pdata->outdrv == PCA963X_OPEN_DRAIN)

			i2c_smbus_write_byte_data(client, PCA963X_MODE2, 0x01);

			mode2 |= 0x01;

		else

			i2c_smbus_write_byte_data(client, PCA963X_MODE2, 0x05);

			mode2 |= 0x05;

		/* Configure direction: normal or inverted */

		if (pdata->dir == PCA963X_INVERTED)

			mode2 |= 0x10;

		i2c_smbus_write_byte_data(pca963x->chip->client, PCA963X_MODE2,

					  mode2);

	}



	return 0;

include/linux/platform_data/leds-pca963x.h

+6 −0
Original line number Diff line number Diff line
@@ -33,10 +33,16 @@ enum pca963x_blink_type { 
	PCA963X_HW_BLINK,

};



enum pca963x_direction {

	PCA963X_NORMAL,

	PCA963X_INVERTED,

};



struct pca963x_platform_data {

	struct led_platform_data leds;

	enum pca963x_outdrv outdrv;

	enum pca963x_blink_type blink_type;

	enum pca963x_direction dir;

};



#endif /* __LINUX_PCA963X_H*/