Add a module_name string to the pwm_lookup struct and if specified
and pwmchip_find_by_name() does not find the pwmchip try calling
request_module with the specified name.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/pwm/core.c | 4 ++++
include/linux/pwm.h | 11 +++++++++--
2 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 0d3ef29..c418a7a 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -823,6 +823,10 @@ struct pwm_device *pwm_get(struct device *dev, const char *con_id)
return ERR_PTR(-ENODEV);
chip = pwmchip_find_by_name(chosen->provider);
+ if (!chip && chosen->module_name) {
+ request_module(chosen->module_name);
+ chip = pwmchip_find_by_name(chosen->provider);
+ }
if (!chip)
return ERR_PTR(-EPROBE_DEFER);
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index 2c6c511..40ab8b6 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -613,18 +613,25 @@ struct pwm_lookup {
const char *con_id;
unsigned int period;
enum pwm_polarity polarity;
+ const char *module_name; /* Optional may be NULL */
};
-#define PWM_LOOKUP(_provider, _index, _dev_id, _con_id, _period, _polarity) \
+#define PWM_LOOKUP_MODNAME(_provider, _index, _dev_id, _con_id, _period, \
+ _polarity, _module_name) \
{ \
.provider = _provider, \
.index = _index, \
.dev_id = _dev_id, \
.con_id = _con_id, \
.period = _period, \
- .polarity = _polarity \
+ .polarity = _polarity, \
+ .module_name = _module_name \
}
+#define PWM_LOOKUP(_provider, _index, _dev_id, _con_id, _period, _polarity) \
+ PWM_LOOKUP_MODNAME(_provider, _index, _dev_id, _con_id, _period, \
+ _polarity, NULL)
+
#if IS_ENABLED(CONFIG_PWM)
void pwm_add_table(struct pwm_lookup *table, size_t num);
void pwm_remove_table(struct pwm_lookup *table, size_t num);
--
2.9.3
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