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When enabled as an output, each GPIO pin can be programed to output remote data coming from the compatible deserializer using the register LOCAL_GPIO_DATA[7:4] field. Signed-off-by: Guoniu Zhou --- drivers/media/i2c/ds90ub953.c | 30 ++++++++++++++++++++++++++---- 1 file changed, 26 insertions(+), 4 deletions(-) diff --git a/drivers/media/i2c/ds90ub953.c b/drivers/media/i2c/ds90ub953.c index e3fc9d66970a762d284955f14db48d7105b4b8c4..98d6b6fab810a8f65a01a604923= 8cbf700eb8cd6 100644 --- a/drivers/media/i2c/ds90ub953.c +++ b/drivers/media/i2c/ds90ub953.c @@ -86,6 +86,7 @@ struct ub953_data { struct mutex reg_lock; =20 u8 current_indirect_target; + u8 gpio_rmten; =20 struct clk_hw clkout_clk_hw; =20 @@ -288,13 +289,17 @@ static int ub953_gpio_direction_out(struct gpio_chip = *gc, unsigned int offset, int value) { struct ub953_data *priv =3D gpiochip_get_data(gc); + unsigned int val; int ret; =20 - ret =3D regmap_update_bits(priv->regmap, UB953_REG_LOCAL_GPIO_DATA, - UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset), - value ? UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset) : - 0); + val =3D priv->gpio_rmten & BIT(offset) + ? UB953_REG_LOCAL_GPIO_DATA_GPIO_RMTEN(offset) + : value ? UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset) : 0; =20 + ret =3D regmap_update_bits(priv->regmap, UB953_REG_LOCAL_GPIO_DATA, + UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset) | + UB953_REG_LOCAL_GPIO_DATA_GPIO_RMTEN(offset), + val); if (ret) return ret; =20 @@ -320,6 +325,12 @@ static int ub953_gpio_get(struct gpio_chip *gc, unsign= ed int offset) static int ub953_gpio_set(struct gpio_chip *gc, unsigned int offset, int v= alue) { struct ub953_data *priv =3D gpiochip_get_data(gc); + struct device *dev =3D &priv->client->dev; + + if (priv->gpio_rmten & BIT(offset)) { + dev_err(dev, "GPIO%u be programed to output remote data\n", offset); + return -EINVAL; + } =20 return regmap_update_bits(priv->regmap, UB953_REG_LOCAL_GPIO_DATA, UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset), @@ -1133,6 +1144,17 @@ static int ub953_parse_dt(struct ub953_data *priv) struct fwnode_handle *ep_fwnode; unsigned char nlanes; int ret; + u8 val; + + /* + * Config ti,gpio-data to program GPIO pin to output remote data + * coming from the compatible deserializer, it's optional. + */ + ret =3D of_property_read_u8(dev->of_node, "ti,gpio-data", &val); + if (ret =3D=3D 0 && val > 15) + return dev_err_probe(dev, -EINVAL, "Out of range: %u\n", val); + + priv->gpio_rmten =3D ret ? 0 : val; =20 ep_fwnode =3D fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), UB953_PAD_SINK, 0, 0); --=20 2.34.1