static int pwm_backlight_ofdata_to_platdata(struct udevice *dev) { struct pwm_backlight_priv *priv = dev_get_priv(dev); struct ofnode_phandle_args args; int index, ret, count, len; const u32 *cell; log_debug("start\n"); ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, "power-supply", &priv->reg); if (ret) log_debug("Cannot get power supply: ret=%d\n", ret); ret = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable, GPIOD_IS_OUT); if (ret) { log_debug("Warning: cannot get enable GPIO: ret=%d\n", ret); if (ret != -ENOENT) return log_ret(ret); } ret = dev_read_phandle_with_args(dev, "pwms", "#pwm-cells", 0, 0, &args); if (ret) { log_debug("Cannot get PWM phandle: ret=%d\n", ret); return log_ret(ret); } ret = uclass_get_device_by_ofnode(UCLASS_PWM, args.node, &priv->pwm); if (ret) { log_debug("Cannot get PWM: ret=%d\n", ret); return log_ret(ret); } if (args.args_count < 2) return log_msg_ret("Not enough arguments to pwm\n", -EINVAL); priv->channel = args.args[0]; priv->period_ns = args.args[1]; if (args.args_count > 2) priv->polarity = args.args[2]; index = dev_read_u32_default(dev, "default-brightness-level", 255); cell = dev_read_prop(dev, "brightness-levels", &len); count = len / sizeof(u32); if (cell && count > index) { priv->levels = malloc(len); if (!priv->levels) return log_ret(-ENOMEM); dev_read_u32_array(dev, "brightness-levels", priv->levels, count); priv->num_levels = count; priv->default_level = priv->levels[index]; priv->max_level = priv->levels[count - 1]; } else { priv->default_level = index; priv->max_level = 255; } priv->cur_level = priv->default_level; log_debug("done\n"); return 0; }
static int riscv_cpu_probe(void) { #ifdef CONFIG_CPU int ret; /* probe cpus so that RISC-V timer can be bound */ ret = cpu_probe_all(); if (ret) return log_msg_ret("RISC-V cpus probe failed\n", ret); #endif return 0; }