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authorAnders Darander <anders@chargestorm.se>2017-04-27 08:37:33 +0200
committerJacek Anaszewski <jacek.anaszewski@gmail.com>2017-05-14 13:01:29 +0200
commitbb29b9cccd95feeb43e11e9b1c2479777082e28a (patch)
treea4d68a91a58dccdd88eae6265ff30a50671d5d12 /drivers/leds
parent2ea659a9ef488125eb46da6eb571de5eae5c43f6 (diff)
downloadlinux-next-bb29b9cccd95feeb43e11e9b1c2479777082e28a.tar.gz
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: Anders Darander <anders@chargestorm.se> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/leds-pca963x.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/leds/leds-pca963x.c b/drivers/leds/leds-pca963x.c
index ded1e4dac36a..3bf9a1271819 100644
--- a/drivers/leds/leds-pca963x.c
+++ b/drivers/leds/leds-pca963x.c
@@ -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;