Hi Jitao,
some things I missed before.
Am Montag, den 02.11.2015, 10:09 +0800 schrieb Jitao Shi:
[...]
> +static int ps8640_regr(struct i2c_client *client, u16 i2c_addr,
> + u8 reg, u8 *value)
> +{
> + int ret;
> +
> + client->addr = i2c_addr;
I think i2c_new_dummy should be used to create additional clients for
the secondary addresses, instead of changing the address of the client
with every transfer.
> + ret = i2c_master_send(client, ®, 1);
> + if (ret <= 0) {
> + DRM_ERROR("Failed to send i2c command, ret=%d\n", ret);
> + return ret;
> + }
> +
> + ret = i2c_master_recv(client, value, 1);
> + if (ret <= 0) {
> + DRM_ERROR("Failed to recv i2c data, ret=%d\n", ret);
> + return ret;
> + }
> +
> + return 0;
> +}
[...]
> +static int ps8640_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct device *dev = &client->dev;
> + struct ps8640 *ps_bridge;
> + struct device_node *np = dev->of_node;
> + struct device_node *in_ep, *out_ep;
> + struct device_node *panel_node = NULL;
> + int ret;
> + u32 temp_reg;
> +
> + ps_bridge = devm_kzalloc(dev, sizeof(*ps_bridge), GFP_KERNEL);
> + if (!ps_bridge)
> + return -ENOMEM;
> +
> + in_ep = of_graph_get_next_endpoint(np, NULL);
> + if (in_ep) {
> + out_ep = of_graph_get_next_endpoint(np, in_ep);
> + of_node_put(in_ep);
> + if (out_ep) {
> + panel_node = of_graph_get_remote_port_parent(out_ep);
> + of_node_put(out_ep);
> + }
> + }
> + if (panel_node) {
> + ps_bridge->panel = of_drm_find_panel(panel_node);
> + of_node_put(panel_node);
> + if (!ps_bridge->panel)
> + return -EPROBE_DEFER;
> + }
> +
> + ps_bridge->client = client;
> +
> + ps_bridge->pwr_3v3_supply = devm_regulator_get(dev, "vdd33-supply");
Should be "vdd3", regulator_get will add the "-supply" suffix.
> + if (IS_ERR(ps_bridge->pwr_3v3_supply)) {
> + dev_err(dev, "cannot get ps_bridge->pwr_3v3_supply\n");
> + return PTR_ERR(ps_bridge->pwr_3v3_supply);
> + }
> +
> + ps_bridge->pwr_1v2_supply = devm_regulator_get(dev, "vdd12-supply");
Same here, "vdd12".
> + if (IS_ERR(ps_bridge->pwr_1v2_supply)) {
> + dev_err(dev, "cannot get ps_bridge->pwr_1v2_supply\n");
> + return PTR_ERR(ps_bridge->pwr_1v2_supply);
> + }
> +
> + ps_bridge->gpio_mode_sel_n = devm_gpiod_get(&client->dev, "mode-sel",
> + GPIOD_OUT_HIGH);
> + if (IS_ERR(ps_bridge->gpio_mode_sel_n)) {
> + ret = PTR_ERR(ps_bridge->gpio_mode_sel_n);
> + DRM_ERROR("cannot get gpio_mode_sel_n %d\n", ret);
> + return ret;
> + }
> +
> + ret = gpiod_direction_output(ps_bridge->gpio_mode_sel_n, 1);
> + if (ret) {
> + DRM_ERROR("cannot configure gpio_mode_sel_n\n");
> + return ret;
> + }
> +
> + ps_bridge->gpio_slp_n = devm_gpiod_get(&client->dev, "sleep-gpios",
> + GPIOD_OUT_HIGH);
Should be "sleep", gpiod_get will add the "-gpios" suffix.
> + if (IS_ERR(ps_bridge->gpio_slp_n)) {
> + ret = PTR_ERR(ps_bridge->gpio_slp_n);
> + DRM_ERROR("cannot get gpio_slp_n %d\n", ret);
> + return ret;
> + }
> +
> + ret = gpiod_direction_output(ps_bridge->gpio_slp_n, 1);
> + if (ret) {
> + DRM_ERROR("cannot configure gpio_slp_n\n");
> + return ret;
> + }
This can be removed, the "devm_gpiod_get(..., GPIOD_OUT_HIGH);" already
does the same.
> +
> + ps_bridge->gpio_rst_n = devm_gpiod_get(&client->dev, "reset",
> + GPIOD_OUT_HIGH);
> + if (IS_ERR(ps_bridge->gpio_rst_n)) {
> + ret = PTR_ERR(ps_bridge->gpio_rst_n);
> + DRM_ERROR("cannot get gpio_rst_n %d\n", ret);
> + return ret;
> + }
> +
> + ret = gpiod_direction_output(ps_bridge->gpio_rst_n, 1);
> + if (ret) {
> + DRM_ERROR("cannot configure gpio_rst_n\n");
> + return ret;
> + }
Same here, the gpiod_direction_output can be removed.
best regards
Philipp
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