diff options
Diffstat (limited to 'drivers/regulator/gpio-regulator.c')
| -rw-r--r-- | drivers/regulator/gpio-regulator.c | 53 |
1 files changed, 34 insertions, 19 deletions
diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c index 98a98ffa7fe..989b23b377c 100644 --- a/drivers/regulator/gpio-regulator.c +++ b/drivers/regulator/gpio-regulator.c @@ -136,9 +136,9 @@ static struct gpio_regulator_config * of_get_gpio_regulator_config(struct device *dev, struct device_node *np) { struct gpio_regulator_config *config; - struct property *prop; const char *regtype; int proplen, gpio, i; + int ret; config = devm_kzalloc(dev, sizeof(struct gpio_regulator_config), @@ -171,22 +171,35 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np) if (!config->gpios) return ERR_PTR(-ENOMEM); + proplen = of_property_count_u32_elems(np, "gpios-states"); + /* optional property */ + if (proplen < 0) + proplen = 0; + + if (proplen > 0 && proplen != config->nr_gpios) { + dev_warn(dev, "gpios <-> gpios-states mismatch\n"); + proplen = 0; + } + for (i = 0; i < config->nr_gpios; i++) { gpio = of_get_named_gpio(np, "gpios", i); if (gpio < 0) break; config->gpios[i].gpio = gpio; + if (proplen > 0) { + of_property_read_u32_index(np, "gpios-states", i, &ret); + if (ret) + config->gpios[i].flags = GPIOF_OUT_INIT_HIGH; + } } /* Fetch states. */ - prop = of_find_property(np, "states", NULL); - if (!prop) { + proplen = of_property_count_u32_elems(np, "states"); + if (proplen < 0) { dev_err(dev, "No 'states' property found\n"); return ERR_PTR(-EINVAL); } - proplen = prop->length / sizeof(int); - config->states = devm_kzalloc(dev, sizeof(struct gpio_regulator_state) * (proplen / 2), @@ -195,19 +208,24 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np) return ERR_PTR(-ENOMEM); for (i = 0; i < proplen / 2; i++) { - config->states[i].value = - be32_to_cpup((int *)prop->value + (i * 2)); - config->states[i].gpios = - be32_to_cpup((int *)prop->value + (i * 2 + 1)); + of_property_read_u32_index(np, "states", i * 2, + &config->states[i].value); + of_property_read_u32_index(np, "states", i * 2 + 1, + &config->states[i].gpios); } config->nr_states = i; - of_property_read_string(np, "regulator-type", ®type); - - if (!strncmp("voltage", regtype, 7)) - config->type = REGULATOR_VOLTAGE; - else if (!strncmp("current", regtype, 7)) - config->type = REGULATOR_CURRENT; + config->type = REGULATOR_VOLTAGE; + ret = of_property_read_string(np, "regulator-type", ®type); + if (ret >= 0) { + if (!strncmp("voltage", regtype, 7)) + config->type = REGULATOR_VOLTAGE; + else if (!strncmp("current", regtype, 7)) + config->type = REGULATOR_CURRENT; + else + dev_warn(dev, "Unknown regulator-type '%s'\n", + regtype); + } return config; } @@ -233,10 +251,8 @@ static int gpio_regulator_probe(struct platform_device *pdev) drvdata = devm_kzalloc(&pdev->dev, sizeof(struct gpio_regulator_data), GFP_KERNEL); - if (drvdata == NULL) { - dev_err(&pdev->dev, "Failed to allocate device data\n"); + if (drvdata == NULL) return -ENOMEM; - } drvdata->desc.name = kstrdup(config->supply_name, GFP_KERNEL); if (drvdata->desc.name == NULL) { @@ -283,7 +299,6 @@ static int gpio_regulator_probe(struct platform_device *pdev) dev_err(&pdev->dev, "No regulator type set\n"); ret = -EINVAL; goto err_memgpio; - break; } drvdata->nr_gpios = config->nr_gpios; |