diff options
| -rw-r--r-- | drivers/regulator/fixed.c | 26 |
1 files changed, 21 insertions, 5 deletions
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c index 8bda3654ae51..b8c3a910502a 100644 --- a/drivers/regulator/fixed.c +++ b/drivers/regulator/fixed.c @@ -61,11 +61,11 @@ of_get_fixed_voltage_config(struct device *dev) config = devm_kzalloc(dev, sizeof(struct fixed_voltage_config), GFP_KERNEL); if (!config) - return NULL; + return ERR_PTR(-ENOMEM); config->init_data = of_get_regulator_init_data(dev, dev->of_node); if (!config->init_data) - return NULL; + return ERR_PTR(-EINVAL); init_data = config->init_data; init_data->constraints.apply_uV = 0; @@ -76,13 +76,26 @@ of_get_fixed_voltage_config(struct device *dev) } else { dev_err(dev, "Fixed regulator specified with variable voltages\n"); - return NULL; + return ERR_PTR(-EINVAL); } if (init_data->constraints.boot_on) config->enabled_at_boot = true; config->gpio = of_get_named_gpio(np, "gpio", 0); + /* + * of_get_named_gpio() currently returns ENODEV rather than + * EPROBE_DEFER. This code attempts to be compatible with both + * for now; the ENODEV check can be removed once the API is fixed. + * of_get_named_gpio() doesn't differentiate between a missing + * property (which would be fine here, since the GPIO is optional) + * and some other error. Patches have been posted for both issues. + * Once they are check in, we should replace this with: + * if (config->gpio < 0 && config->gpio != -ENOENT) + */ + if ((config->gpio == -ENODEV) || (config->gpio == -EPROBE_DEFER)) + return ERR_PTR(-EPROBE_DEFER); + delay = of_get_property(np, "startup-delay-us", NULL); if (delay) config->startup_delay = be32_to_cpu(*delay); @@ -172,10 +185,13 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev) struct regulator_config cfg = { }; int ret; - if (pdev->dev.of_node) + if (pdev->dev.of_node) { config = of_get_fixed_voltage_config(&pdev->dev); - else + if (IS_ERR(config)) + return PTR_ERR(config); + } else { config = pdev->dev.platform_data; + } if (!config) return -ENOMEM; |