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drm/bridge: ptn3460: use gpiod interface

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Modify driver to support gpiod interface.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Tested-by: Rahul Sharma <rahul.sharma@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Tested-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Ajay Kumar 2015-01-20 22:08:49 +05:30 committed by Thierry Reding
parent a1899953c0
commit af478d8823
1 changed files with 36 additions and 52 deletions
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88
drivers/gpu/drm/bridge/ptn3460.c
View file

@ -42,8 +42,8 @@ struct ptn3460_bridge {
struct drm_bridge bridge;
struct edid *edid;
struct drm_panel *panel;
int gpio_pd_n;
int gpio_rst_n;
struct gpio_desc *gpio_pd_n;
struct gpio_desc *gpio_rst_n;
u32 edid_emulation;
bool enabled;
};
@ -132,14 +132,11 @@ static void ptn3460_pre_enable(struct drm_bridge *bridge)
if (ptn_bridge->enabled)
return;
if (gpio_is_valid(ptn_bridge->gpio_pd_n))
gpio_set_value(ptn_bridge->gpio_pd_n, 1);
gpiod_set_value(ptn_bridge->gpio_pd_n, 1);
if (gpio_is_valid(ptn_bridge->gpio_rst_n)) {
gpio_set_value(ptn_bridge->gpio_rst_n, 0);
usleep_range(10, 20);
gpio_set_value(ptn_bridge->gpio_rst_n, 1);
}
gpiod_set_value(ptn_bridge->gpio_rst_n, 0);
usleep_range(10, 20);
gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
if (drm_panel_prepare(ptn_bridge->panel)) {
DRM_ERROR("failed to prepare panel\n");
@ -184,11 +181,8 @@ static void ptn3460_disable(struct drm_bridge *bridge)
return;
}
if (gpio_is_valid(ptn_bridge->gpio_rst_n))
gpio_set_value(ptn_bridge->gpio_rst_n, 1);
if (gpio_is_valid(ptn_bridge->gpio_pd_n))
gpio_set_value(ptn_bridge->gpio_pd_n, 0);
gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
gpiod_set_value(ptn_bridge->gpio_pd_n, 0);
}
static void ptn3460_post_disable(struct drm_bridge *bridge)
@ -335,39 +329,41 @@ static int ptn3460_probe(struct i2c_client *client,
}
ptn_bridge->client = client;
ptn_bridge->gpio_pd_n = of_get_named_gpio(dev->of_node,
"powerdown-gpio", 0);
if (gpio_is_valid(ptn_bridge->gpio_pd_n)) {
ret = gpio_request_one(ptn_bridge->gpio_pd_n,
GPIOF_OUT_INIT_HIGH, "PTN3460_PD_N");
if (ret) {
dev_err(dev, "Request powerdown-gpio failed (%d)\n",
ret);
return ret;
}
ptn_bridge->gpio_pd_n = devm_gpiod_get(&client->dev, "powerdown");
if (IS_ERR(ptn_bridge->gpio_pd_n)) {
ret = PTR_ERR(ptn_bridge->gpio_pd_n);
dev_err(dev, "cannot get gpio_pd_n %d\n", ret);
return ret;
}
ptn_bridge->gpio_rst_n = of_get_named_gpio(dev->of_node,
"reset-gpio", 0);
if (gpio_is_valid(ptn_bridge->gpio_rst_n)) {
/*
* Request the reset pin low to avoid the bridge being
* initialized prematurely
*/
ret = gpio_request_one(ptn_bridge->gpio_rst_n,
GPIOF_OUT_INIT_LOW, "PTN3460_RST_N");
if (ret) {
dev_err(dev, "Request reset-gpio failed (%d)\n", ret);
gpio_free(ptn_bridge->gpio_pd_n);
return ret;
}
ret = gpiod_direction_output(ptn_bridge->gpio_pd_n, 1);
if (ret) {
DRM_ERROR("cannot configure gpio_pd_n\n");
return ret;
}
ptn_bridge->gpio_rst_n = devm_gpiod_get(&client->dev, "reset");
if (IS_ERR(ptn_bridge->gpio_rst_n)) {
ret = PTR_ERR(ptn_bridge->gpio_rst_n);
DRM_ERROR("cannot get gpio_rst_n %d\n", ret);
return ret;
}
/*
* Request the reset pin low to avoid the bridge being
* initialized prematurely
*/
ret = gpiod_direction_output(ptn_bridge->gpio_rst_n, 0);
if (ret) {
DRM_ERROR("cannot configure gpio_rst_n\n");
return ret;
}
ret = of_property_read_u32(dev->of_node, "edid-emulation",
&ptn_bridge->edid_emulation);
if (ret) {
dev_err(dev, "Can't read EDID emulation value\n");
goto err;
return ret;
}
ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs;
@ -375,19 +371,12 @@ static int ptn3460_probe(struct i2c_client *client,
ret = drm_bridge_add(&ptn_bridge->bridge);
if (ret) {
DRM_ERROR("Failed to add bridge\n");
goto err;
return ret;
}
i2c_set_clientdata(client, ptn_bridge);
return 0;
err:
if (gpio_is_valid(ptn_bridge->gpio_pd_n))
gpio_free(ptn_bridge->gpio_pd_n);
if (gpio_is_valid(ptn_bridge->gpio_rst_n))
gpio_free(ptn_bridge->gpio_rst_n);
return ret;
}
static int ptn3460_remove(struct i2c_client *client)
@ -396,11 +385,6 @@ static int ptn3460_remove(struct i2c_client *client)
drm_bridge_remove(&ptn_bridge->bridge);
if (gpio_is_valid(ptn_bridge->gpio_pd_n))
gpio_free(ptn_bridge->gpio_pd_n);
if (gpio_is_valid(ptn_bridge->gpio_rst_n))
gpio_free(ptn_bridge->gpio_rst_n);
return 0;
}