{
struct pwm_device *pwm;
- /* check, whether the driver supports a third cell for flags */
- if (pc->of_pwm_n_cells < 3)
+ if (pc->of_pwm_n_cells < 2)
return ERR_PTR(-EINVAL);
/* flags in the third cell are optional */
pwm->args.period = args->args[1];
pwm->args.polarity = PWM_POLARITY_NORMAL;
- if (args->args_count > 2 && args->args[2] & PWM_POLARITY_INVERTED)
- pwm->args.polarity = PWM_POLARITY_INVERSED;
+ if (pc->of_pwm_n_cells >= 3) {
+ if (args->args_count > 2 && args->args[2] & PWM_POLARITY_INVERTED)
+ pwm->args.polarity = PWM_POLARITY_INVERSED;
+ }
return pwm;
}
EXPORT_SYMBOL_GPL(of_pwm_xlate_with_flags);
-static struct pwm_device *
-of_pwm_simple_xlate(struct pwm_chip *pc, const struct of_phandle_args *args)
-{
- struct pwm_device *pwm;
-
- /* sanity check driver support */
- if (pc->of_pwm_n_cells < 2)
- return ERR_PTR(-EINVAL);
-
- /* all cells are required */
- if (args->args_count != pc->of_pwm_n_cells)
- return ERR_PTR(-EINVAL);
-
- if (args->args[0] >= pc->npwm)
- return ERR_PTR(-EINVAL);
-
- pwm = pwm_request_from_chip(pc, args->args[0], NULL);
- if (IS_ERR(pwm))
- return pwm;
-
- pwm->args.period = args->args[1];
-
- return pwm;
-}
-
static void of_pwmchip_add(struct pwm_chip *chip)
{
if (!chip->dev || !chip->dev->of_node)
return;
if (!chip->of_xlate) {
- chip->of_xlate = of_pwm_simple_xlate;
- chip->of_pwm_n_cells = 2;
+ u32 pwm_cells;
+
+ if (of_property_read_u32(chip->dev->of_node, "#pwm-cells",
+ &pwm_cells))
+ pwm_cells = 2;
+
+ chip->of_xlate = of_pwm_xlate_with_flags;
+ chip->of_pwm_n_cells = pwm_cells;
}
of_node_get(chip->dev->of_node);
*
* Returns: 0 on success or a negative error code on failure.
*/
-int pwmchip_remove(struct pwm_chip *chip)
+void pwmchip_remove(struct pwm_chip *chip)
{
- unsigned int i;
- int ret = 0;
-
pwmchip_sysfs_unexport(chip);
mutex_lock(&pwm_lock);
- for (i = 0; i < chip->npwm; i++) {
- struct pwm_device *pwm = &chip->pwms[i];
-
- if (test_bit(PWMF_REQUESTED, &pwm->flags)) {
- ret = -EBUSY;
- goto out;
- }
- }
-
list_del_init(&chip->list);
if (IS_ENABLED(CONFIG_OF))
free_pwms(chip);
-out:
mutex_unlock(&pwm_lock);
- return ret;
}
EXPORT_SYMBOL_GPL(pwmchip_remove);
+static void devm_pwmchip_remove(void *data)
+{
+ struct pwm_chip *chip = data;
+
+ pwmchip_remove(chip);
+}
+
+int devm_pwmchip_add(struct device *dev, struct pwm_chip *chip)
+{
+ int ret;
+
+ ret = pwmchip_add(chip);
+ if (ret)
+ return ret;
+
+ return devm_add_action_or_reset(dev, devm_pwmchip_remove, chip);
+}
+EXPORT_SYMBOL_GPL(devm_pwmchip_add);
+
/**
* pwm_request() - request a PWM device
* @pwm: global PWM device index
if (state->period == pwm->state.period &&
state->duty_cycle == pwm->state.duty_cycle &&
state->polarity == pwm->state.polarity &&
- state->enabled == pwm->state.enabled)
+ state->enabled == pwm->state.enabled &&
+ state->usage_power == pwm->state.usage_power)
return 0;
if (chip->ops->apply) {
}
EXPORT_SYMBOL_GPL(pwm_adjust_config);
-static struct pwm_chip *of_node_to_pwmchip(struct device_node *np)
+static struct pwm_chip *fwnode_to_pwmchip(struct fwnode_handle *fwnode)
{
struct pwm_chip *chip;
mutex_lock(&pwm_lock);
list_for_each_entry(chip, &pwm_chips, list)
- if (chip->dev && chip->dev->of_node == np) {
+ if (chip->dev && dev_fwnode(chip->dev) == fwnode) {
mutex_unlock(&pwm_lock);
return chip;
}
return ERR_PTR(err);
}
- pc = of_node_to_pwmchip(args.np);
+ pc = fwnode_to_pwmchip(of_fwnode_handle(args.np));
if (IS_ERR(pc)) {
if (PTR_ERR(pc) != -EPROBE_DEFER)
pr_err("%s(): PWM chip not found\n", __func__);
}
EXPORT_SYMBOL_GPL(of_pwm_get);
-#if IS_ENABLED(CONFIG_ACPI)
-static struct pwm_chip *device_to_pwmchip(struct device *dev)
-{
- struct pwm_chip *chip;
-
- mutex_lock(&pwm_lock);
-
- list_for_each_entry(chip, &pwm_chips, list) {
- struct acpi_device *adev = ACPI_COMPANION(chip->dev);
-
- if ((chip->dev == dev) || (adev && &adev->dev == dev)) {
- mutex_unlock(&pwm_lock);
- return chip;
- }
- }
-
- mutex_unlock(&pwm_lock);
-
- return ERR_PTR(-EPROBE_DEFER);
-}
-#endif
-
/**
* acpi_pwm_get() - request a PWM via parsing "pwms" property in ACPI
- * @fwnode: firmware node to get the "pwm" property from
+ * @fwnode: firmware node to get the "pwms" property from
*
* Returns the PWM device parsed from the fwnode and index specified in the
* "pwms" property or a negative error-code on failure.
* Returns: A pointer to the requested PWM device or an ERR_PTR()-encoded
* error code on failure.
*/
-static struct pwm_device *acpi_pwm_get(struct fwnode_handle *fwnode)
+static struct pwm_device *acpi_pwm_get(const struct fwnode_handle *fwnode)
{
- struct pwm_device *pwm = ERR_PTR(-ENODEV);
-#if IS_ENABLED(CONFIG_ACPI)
+ struct pwm_device *pwm;
struct fwnode_reference_args args;
- struct acpi_device *acpi;
struct pwm_chip *chip;
int ret;
if (ret < 0)
return ERR_PTR(ret);
- acpi = to_acpi_device_node(args.fwnode);
- if (!acpi)
- return ERR_PTR(-EINVAL);
-
if (args.nargs < 2)
return ERR_PTR(-EPROTO);
- chip = device_to_pwmchip(&acpi->dev);
+ chip = fwnode_to_pwmchip(args.fwnode);
if (IS_ERR(chip))
return ERR_CAST(chip);
if (args.nargs > 2 && args.args[2] & PWM_POLARITY_INVERTED)
pwm->args.polarity = PWM_POLARITY_INVERSED;
-#endif
return pwm;
}
*/
struct pwm_device *pwm_get(struct device *dev, const char *con_id)
{
+ const struct fwnode_handle *fwnode = dev ? dev_fwnode(dev) : NULL;
const char *dev_id = dev ? dev_name(dev) : NULL;
struct pwm_device *pwm;
struct pwm_chip *chip;
int err;
/* look up via DT first */
- if (IS_ENABLED(CONFIG_OF) && dev && dev->of_node)
- return of_pwm_get(dev, dev->of_node, con_id);
+ if (is_of_node(fwnode))
+ return of_pwm_get(dev, to_of_node(fwnode), con_id);
/* then lookup via ACPI */
- if (dev && is_acpi_node(dev->fwnode)) {
- pwm = acpi_pwm_get(dev->fwnode);
+ if (is_acpi_node(fwnode)) {
+ pwm = acpi_pwm_get(fwnode);
if (!IS_ERR(pwm) || PTR_ERR(pwm) != -ENOENT)
return pwm;
}
}
EXPORT_SYMBOL_GPL(pwm_put);
-static void devm_pwm_release(struct device *dev, void *res)
+static void devm_pwm_release(void *pwm)
{
- pwm_put(*(struct pwm_device **)res);
+ pwm_put(pwm);
}
/**
*/
struct pwm_device *devm_pwm_get(struct device *dev, const char *con_id)
{
- struct pwm_device **ptr, *pwm;
-
- ptr = devres_alloc(devm_pwm_release, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return ERR_PTR(-ENOMEM);
+ struct pwm_device *pwm;
+ int ret;
pwm = pwm_get(dev, con_id);
- if (!IS_ERR(pwm)) {
- *ptr = pwm;
- devres_add(dev, ptr);
- } else {
- devres_free(ptr);
- }
+ if (IS_ERR(pwm))
+ return pwm;
+
+ ret = devm_add_action_or_reset(dev, devm_pwm_release, pwm);
+ if (ret)
+ return ERR_PTR(ret);
return pwm;
}
struct pwm_device *devm_of_pwm_get(struct device *dev, struct device_node *np,
const char *con_id)
{
- struct pwm_device **ptr, *pwm;
-
- ptr = devres_alloc(devm_pwm_release, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return ERR_PTR(-ENOMEM);
+ struct pwm_device *pwm;
+ int ret;
pwm = of_pwm_get(dev, np, con_id);
- if (!IS_ERR(pwm)) {
- *ptr = pwm;
- devres_add(dev, ptr);
- } else {
- devres_free(ptr);
- }
+ if (IS_ERR(pwm))
+ return pwm;
+
+ ret = devm_add_action_or_reset(dev, devm_pwm_release, pwm);
+ if (ret)
+ return ERR_PTR(ret);
return pwm;
}
struct fwnode_handle *fwnode,
const char *con_id)
{
- struct pwm_device **ptr, *pwm = ERR_PTR(-ENODEV);
-
- ptr = devres_alloc(devm_pwm_release, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return ERR_PTR(-ENOMEM);
+ struct pwm_device *pwm = ERR_PTR(-ENODEV);
+ int ret;
if (is_of_node(fwnode))
pwm = of_pwm_get(dev, to_of_node(fwnode), con_id);
else if (is_acpi_node(fwnode))
pwm = acpi_pwm_get(fwnode);
+ if (IS_ERR(pwm))
+ return pwm;
- if (!IS_ERR(pwm)) {
- *ptr = pwm;
- devres_add(dev, ptr);
- } else {
- devres_free(ptr);
- }
+ ret = devm_add_action_or_reset(dev, devm_pwm_release, pwm);
+ if (ret)
+ return ERR_PTR(ret);
return pwm;
}
EXPORT_SYMBOL_GPL(devm_fwnode_pwm_get);
-static int devm_pwm_match(struct device *dev, void *res, void *data)
-{
- struct pwm_device **p = res;
-
- if (WARN_ON(!p || !*p))
- return 0;
-
- return *p == data;
-}
-
-/**
- * devm_pwm_put() - resource managed pwm_put()
- * @dev: device for PWM consumer
- * @pwm: PWM device
- *
- * Release a PWM previously allocated using devm_pwm_get(). Calling this
- * function is usually not needed because devm-allocated resources are
- * automatically released on driver detach.
- */
-void devm_pwm_put(struct device *dev, struct pwm_device *pwm)
-{
- WARN_ON(devres_release(dev, devm_pwm_release, devm_pwm_match, pwm));
-}
-EXPORT_SYMBOL_GPL(devm_pwm_put);
-
#ifdef CONFIG_DEBUG_FS
static void pwm_dbg_show(struct pwm_chip *chip, struct seq_file *s)
{
seq_printf(s, " polarity: %s",
state.polarity ? "inverse" : "normal");
+ if (state.usage_power)
+ seq_puts(s, " usage_power");
+
seq_puts(s, "\n");
}
}
projects / linux-2.6-microblaze.git / blobdiff