diff options
Diffstat (limited to 'drivers/media/i2c/ov7251.c')
| -rw-r--r-- | drivers/media/i2c/ov7251.c | 37 |
1 files changed, 11 insertions, 26 deletions
diff --git a/drivers/media/i2c/ov7251.c b/drivers/media/i2c/ov7251.c index 30f61e04ecaf..27afc3fc0175 100644 --- a/drivers/media/i2c/ov7251.c +++ b/drivers/media/i2c/ov7251.c @@ -922,6 +922,8 @@ static int ov7251_set_power_on(struct device *dev) return ret; } + usleep_range(1000, 1100); + gpiod_set_value_cansleep(ov7251->enable_gpio, 1); /* wait at least 65536 external clock cycles */ @@ -1484,9 +1486,14 @@ static int ov7251_check_hwcfg(struct ov7251 *ov7251) unsigned int i, j; int ret; + /* + * Sometimes the fwnode graph is initialized by the bridge driver + * Bridge drivers doing this may also add GPIO mappings, wait for this. + */ endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL); if (!endpoint) - return -EPROBE_DEFER; /* could be provided by cio2-bridge */ + return dev_err_probe(ov7251->dev, -EPROBE_DEFER, + "waiting for fwnode graph endpoint\n"); ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg); fwnode_handle_put(endpoint); @@ -1623,7 +1630,6 @@ static int ov7251_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct ov7251 *ov7251; - unsigned int rate = 0, clk_rate = 0; int ret; int i; @@ -1639,33 +1645,12 @@ static int ov7251_probe(struct i2c_client *client) return ret; /* get system clock (xclk) */ - ov7251->xclk = devm_clk_get_optional(dev, NULL); + ov7251->xclk = devm_v4l2_sensor_clk_get(dev, NULL); if (IS_ERR(ov7251->xclk)) return dev_err_probe(dev, PTR_ERR(ov7251->xclk), "could not get xclk"); - /* - * We could have either a 24MHz or 19.2MHz clock rate from either DT or - * ACPI. We also need to support the IPU3 case which will have both an - * external clock AND a clock-frequency property. - */ - ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency", - &rate); - if (ret && !ov7251->xclk) - return dev_err_probe(dev, ret, "invalid clock config\n"); - - clk_rate = clk_get_rate(ov7251->xclk); - ov7251->xclk_freq = clk_rate ? clk_rate : rate; - - if (ov7251->xclk_freq == 0) - return dev_err_probe(dev, -EINVAL, "invalid clock frequency\n"); - - if (!ret && ov7251->xclk) { - ret = clk_set_rate(ov7251->xclk, rate); - if (ret) - return dev_err_probe(dev, ret, - "failed to set clock rate\n"); - } + ov7251->xclk_freq = clk_get_rate(ov7251->xclk); for (i = 0; i < ARRAY_SIZE(supported_xclk_rates); i++) if (ov7251->xclk_freq == supported_xclk_rates[i]) @@ -1696,7 +1681,7 @@ static int ov7251_probe(struct i2c_client *client) return PTR_ERR(ov7251->analog_regulator); } - ov7251->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_HIGH); + ov7251->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW); if (IS_ERR(ov7251->enable_gpio)) { dev_err(dev, "cannot get enable gpio\n"); return PTR_ERR(ov7251->enable_gpio); |