Simplify couple of drivers by using the new devm_regulator_*get_enable*()
These patches were previously part of the series:
https://lore.kernel.org/lkml/[email protected]/
"Devm helpers for regulator get and enable". I did keep the patch series
versioning even though I changed the series name (subject of this mail)
to "Use devm helpers for regulator get and enable". Name was changed
because the devm helpers are already in 6.1-rc1.
Also, most of the patches in the series are already merged to subsystem
trees so this series now contains only the patches that have not yet
been merged. I hope they can be now directly taken sirectly into
respective subsystem trees as the dependencies should be in v6.1-rc1.
Please note that these changes are only compile-tested as I don't have
the HW to do proper testing. Thus, reviewing / testing is highly
appreciated.
Revision history:
v4: RESEND2:
- resend code unchanged. Commit titles and and commit messages
improved.
v4: RESEND:
- resend only the drm patches - others have been applied
v3 => v4:
- Drop applied patches
- rewrite cover-letter
- rebase on v6.1-rc1
- split meson and sii902x into own patches as requested.
- slightly modify dev_err_probe() return in sii902x.
---
Matti Vaittinen (2):
drm/bridge: sii902x: Use devm_regulator_bulk_get_enable()
drm/meson: dw-hdmi: Use devm_regulator_*get_enable*()
drivers/gpu/drm/bridge/sii902x.c | 26 ++++----------------------
drivers/gpu/drm/meson/meson_dw_hdmi.c | 23 +++--------------------
2 files changed, 7 insertions(+), 42 deletions(-)
base-commit: 094226ad94f471a9f19e8f8e7140a09c2625abaa
--
2.38.1
--
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND
~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]
Simplify using devm_regulator_bulk_get_enable()
Signed-off-by: Matti Vaittinen <[email protected]>
Acked-by: Robert Foss <[email protected]>
---
v4 resend 2:
Resending unchanged code with commit title prefix adjusted as suggested
by Robert
I am doing a clean-up for my local git and encountered this one.
Respinning as it seems this one fell through the cracks.
---
drivers/gpu/drm/bridge/sii902x.c | 26 ++++----------------------
1 file changed, 4 insertions(+), 22 deletions(-)
diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index 878fb7d3732b..f6e8b401069b 100644
--- a/drivers/gpu/drm/bridge/sii902x.c
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -171,7 +171,6 @@ struct sii902x {
struct drm_connector connector;
struct gpio_desc *reset_gpio;
struct i2c_mux_core *i2cmux;
- struct regulator_bulk_data supplies[2];
bool sink_is_hdmi;
/*
* Mutex protects audio and video functions from interfering
@@ -1072,6 +1071,7 @@ static int sii902x_probe(struct i2c_client *client,
struct device *dev = &client->dev;
struct device_node *endpoint;
struct sii902x *sii902x;
+ static const char * const supplies[] = {"iovcc", "cvcc12"};
int ret;
ret = i2c_check_functionality(client->adapter,
@@ -1122,27 +1122,11 @@ static int sii902x_probe(struct i2c_client *client,
mutex_init(&sii902x->mutex);
- sii902x->supplies[0].supply = "iovcc";
- sii902x->supplies[1].supply = "cvcc12";
- ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(sii902x->supplies),
- sii902x->supplies);
+ ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(supplies), supplies);
if (ret < 0)
- return ret;
-
- ret = regulator_bulk_enable(ARRAY_SIZE(sii902x->supplies),
- sii902x->supplies);
- if (ret < 0) {
- dev_err_probe(dev, ret, "Failed to enable supplies");
- return ret;
- }
+ return dev_err_probe(dev, ret, "Failed to enable supplies");
- ret = sii902x_init(sii902x);
- if (ret < 0) {
- regulator_bulk_disable(ARRAY_SIZE(sii902x->supplies),
- sii902x->supplies);
- }
-
- return ret;
+ return sii902x_init(sii902x);
}
static void sii902x_remove(struct i2c_client *client)
@@ -1152,8 +1136,6 @@ static void sii902x_remove(struct i2c_client *client)
i2c_mux_del_adapters(sii902x->i2cmux);
drm_bridge_remove(&sii902x->bridge);
- regulator_bulk_disable(ARRAY_SIZE(sii902x->supplies),
- sii902x->supplies);
}
static const struct of_device_id sii902x_dt_ids[] = {
--
2.38.1
--
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND
~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]
Simplify using the devm_regulator_get_enable_optional(). Also drop the
now unused struct member 'hdmi_supply'.
Signed-off-by: Matti Vaittinen <[email protected]>
Martin Blumenstingl <[email protected]>
---
v4 resend 2:
Respinning unchanged code with the commit title changed as wa suggested
by Robert Foss and commit message changed as was suggested by Martin.
I am doing a clean-up for my local git and encountered this one.
Respinning as it seems this one fell through the cracks.
---
drivers/gpu/drm/meson/meson_dw_hdmi.c | 23 +++--------------------
1 file changed, 3 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index 5cd2b2ebbbd3..7642f740272b 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -140,7 +140,6 @@ struct meson_dw_hdmi {
struct reset_control *hdmitx_apb;
struct reset_control *hdmitx_ctrl;
struct reset_control *hdmitx_phy;
- struct regulator *hdmi_supply;
u32 irq_stat;
struct dw_hdmi *hdmi;
struct drm_bridge *bridge;
@@ -665,11 +664,6 @@ static void meson_dw_hdmi_init(struct meson_dw_hdmi *meson_dw_hdmi)
}
-static void meson_disable_regulator(void *data)
-{
- regulator_disable(data);
-}
-
static void meson_disable_clk(void *data)
{
clk_disable_unprepare(data);
@@ -723,20 +717,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
meson_dw_hdmi->data = match;
dw_plat_data = &meson_dw_hdmi->dw_plat_data;
- meson_dw_hdmi->hdmi_supply = devm_regulator_get_optional(dev, "hdmi");
- if (IS_ERR(meson_dw_hdmi->hdmi_supply)) {
- if (PTR_ERR(meson_dw_hdmi->hdmi_supply) == -EPROBE_DEFER)
- return -EPROBE_DEFER;
- meson_dw_hdmi->hdmi_supply = NULL;
- } else {
- ret = regulator_enable(meson_dw_hdmi->hdmi_supply);
- if (ret)
- return ret;
- ret = devm_add_action_or_reset(dev, meson_disable_regulator,
- meson_dw_hdmi->hdmi_supply);
- if (ret)
- return ret;
- }
+ ret = devm_regulator_get_enable_optional(dev, "hdmi");
+ if (ret != -ENODEV)
+ return ret;
meson_dw_hdmi->hdmitx_apb = devm_reset_control_get_exclusive(dev,
"hdmitx_apb");
--
2.38.1
--
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND
~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]
Hi,
On Wed, 30 Nov 2022 11:21:51 +0200, Matti Vaittinen wrote:
> Simplify couple of drivers by using the new devm_regulator_*get_enable*()
>
> These patches were previously part of the series:
> https://lore.kernel.org/lkml/[email protected]/
> "Devm helpers for regulator get and enable". I did keep the patch series
> versioning even though I changed the series name (subject of this mail)
> to "Use devm helpers for regulator get and enable". Name was changed
> because the devm helpers are already in 6.1-rc1.
>
> [...]
Thanks, Applied to https://anongit.freedesktop.org/git/drm/drm-misc.git (drm-misc-next)
[1/2] drm/bridge: sii902x: Use devm_regulator_bulk_get_enable()
https://cgit.freedesktop.org/drm/drm-misc/commit/?id=ff1eae1201a46f997126297d2d3440baa2d1b9a9
[2/2] drm/meson: dw-hdmi: Use devm_regulator_*get_enable*()
https://cgit.freedesktop.org/drm/drm-misc/commit/?id=429e8706366166494314a46c82a9a9929aedbb8c
--
Neil
On 30/11/2022 10:23, Matti Vaittinen wrote:
> Simplify using the devm_regulator_get_enable_optional(). Also drop the
> now unused struct member 'hdmi_supply'.
>
> Signed-off-by: Matti Vaittinen <[email protected]>
> Martin Blumenstingl <[email protected]>
Missing Acked-by, I'll add it while applying.
Neil
>
> ---
> v4 resend 2:
> Respinning unchanged code with the commit title changed as wa suggested
> by Robert Foss and commit message changed as was suggested by Martin.
>
> I am doing a clean-up for my local git and encountered this one.
> Respinning as it seems this one fell through the cracks.
> ---
> drivers/gpu/drm/meson/meson_dw_hdmi.c | 23 +++--------------------
> 1 file changed, 3 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> index 5cd2b2ebbbd3..7642f740272b 100644
> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> @@ -140,7 +140,6 @@ struct meson_dw_hdmi {
> struct reset_control *hdmitx_apb;
> struct reset_control *hdmitx_ctrl;
> struct reset_control *hdmitx_phy;
> - struct regulator *hdmi_supply;
> u32 irq_stat;
> struct dw_hdmi *hdmi;
> struct drm_bridge *bridge;
> @@ -665,11 +664,6 @@ static void meson_dw_hdmi_init(struct meson_dw_hdmi *meson_dw_hdmi)
>
> }
>
> -static void meson_disable_regulator(void *data)
> -{
> - regulator_disable(data);
> -}
> -
> static void meson_disable_clk(void *data)
> {
> clk_disable_unprepare(data);
> @@ -723,20 +717,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
> meson_dw_hdmi->data = match;
> dw_plat_data = &meson_dw_hdmi->dw_plat_data;
>
> - meson_dw_hdmi->hdmi_supply = devm_regulator_get_optional(dev, "hdmi");
> - if (IS_ERR(meson_dw_hdmi->hdmi_supply)) {
> - if (PTR_ERR(meson_dw_hdmi->hdmi_supply) == -EPROBE_DEFER)
> - return -EPROBE_DEFER;
> - meson_dw_hdmi->hdmi_supply = NULL;
> - } else {
> - ret = regulator_enable(meson_dw_hdmi->hdmi_supply);
> - if (ret)
> - return ret;
> - ret = devm_add_action_or_reset(dev, meson_disable_regulator,
> - meson_dw_hdmi->hdmi_supply);
> - if (ret)
> - return ret;
> - }
> + ret = devm_regulator_get_enable_optional(dev, "hdmi");
> + if (ret != -ENODEV)
> + return ret;
>
> meson_dw_hdmi->hdmitx_apb = devm_reset_control_get_exclusive(dev,
> "hdmitx_apb");
On 12/1/22 10:38, Neil Armstrong wrote:
> On 30/11/2022 10:23, Matti Vaittinen wrote:
>> Simplify using the devm_regulator_get_enable_optional(). Also drop the
>> now unused struct member 'hdmi_supply'.
>>
>> Signed-off-by: Matti Vaittinen <[email protected]>
>> Martin Blumenstingl <[email protected]>
>
> Missing Acked-by, I'll add it while applying.
Oh, well spotted. I should've been more careful.. Sorry and thanks for
sorting it out!
--Matti
--
Matti Vaittinen
Linux kernel developer at ROHM Semiconductors
Oulu Finland
~~ When things go utterly wrong vim users can always type :help! ~~
Hi Matti,
On 30.11.2022 10:23, Matti Vaittinen wrote:
> Simplify using the devm_regulator_get_enable_optional(). Also drop the
> now unused struct member 'hdmi_supply'.
>
> Signed-off-by: Matti Vaittinen <[email protected]>
> Martin Blumenstingl <[email protected]>
> ---
> v4 resend 2:
> Respinning unchanged code with the commit title changed as wa suggested
> by Robert Foss and commit message changed as was suggested by Martin.
>
> I am doing a clean-up for my local git and encountered this one.
> Respinning as it seems this one fell through the cracks.
> ---
> drivers/gpu/drm/meson/meson_dw_hdmi.c | 23 +++--------------------
> 1 file changed, 3 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> index 5cd2b2ebbbd3..7642f740272b 100644
> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> @@ -140,7 +140,6 @@ struct meson_dw_hdmi {
> struct reset_control *hdmitx_apb;
> struct reset_control *hdmitx_ctrl;
> struct reset_control *hdmitx_phy;
> - struct regulator *hdmi_supply;
> u32 irq_stat;
> struct dw_hdmi *hdmi;
> struct drm_bridge *bridge;
> @@ -665,11 +664,6 @@ static void meson_dw_hdmi_init(struct meson_dw_hdmi *meson_dw_hdmi)
>
> }
>
> -static void meson_disable_regulator(void *data)
> -{
> - regulator_disable(data);
> -}
> -
> static void meson_disable_clk(void *data)
> {
> clk_disable_unprepare(data);
> @@ -723,20 +717,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
> meson_dw_hdmi->data = match;
> dw_plat_data = &meson_dw_hdmi->dw_plat_data;
>
> - meson_dw_hdmi->hdmi_supply = devm_regulator_get_optional(dev, "hdmi");
> - if (IS_ERR(meson_dw_hdmi->hdmi_supply)) {
> - if (PTR_ERR(meson_dw_hdmi->hdmi_supply) == -EPROBE_DEFER)
> - return -EPROBE_DEFER;
> - meson_dw_hdmi->hdmi_supply = NULL;
> - } else {
> - ret = regulator_enable(meson_dw_hdmi->hdmi_supply);
> - if (ret)
> - return ret;
> - ret = devm_add_action_or_reset(dev, meson_disable_regulator,
> - meson_dw_hdmi->hdmi_supply);
> - if (ret)
> - return ret;
> - }
> + ret = devm_regulator_get_enable_optional(dev, "hdmi");
> + if (ret != -ENODEV)
The above line should be "if (ret < 0)", otherwise it breaks hdmi support.
I've noticed this once this change has been merged to linux-next and all
my Amlogic Meson based boards failed to initialize HDMI. Is it possible
to fix this in drm tree or do I need to send the incremental fixup?
> + return ret;
>
> meson_dw_hdmi->hdmitx_apb = devm_reset_control_get_exclusive(dev,
> "hdmitx_apb");
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
On 09/01/2023 14:46, Marek Szyprowski wrote:
> Hi Matti,
>
> On 30.11.2022 10:23, Matti Vaittinen wrote:
>> Simplify using the devm_regulator_get_enable_optional(). Also drop the
>> now unused struct member 'hdmi_supply'.
>>
>> Signed-off-by: Matti Vaittinen <[email protected]>
>> Martin Blumenstingl <[email protected]>
>> ---
>> v4 resend 2:
>> Respinning unchanged code with the commit title changed as wa suggested
>> by Robert Foss and commit message changed as was suggested by Martin.
>>
>> I am doing a clean-up for my local git and encountered this one.
>> Respinning as it seems this one fell through the cracks.
>> ---
>> drivers/gpu/drm/meson/meson_dw_hdmi.c | 23 +++--------------------
>> 1 file changed, 3 insertions(+), 20 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
>> index 5cd2b2ebbbd3..7642f740272b 100644
>> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
>> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
>> @@ -140,7 +140,6 @@ struct meson_dw_hdmi {
>> struct reset_control *hdmitx_apb;
>> struct reset_control *hdmitx_ctrl;
>> struct reset_control *hdmitx_phy;
>> - struct regulator *hdmi_supply;
>> u32 irq_stat;
>> struct dw_hdmi *hdmi;
>> struct drm_bridge *bridge;
>> @@ -665,11 +664,6 @@ static void meson_dw_hdmi_init(struct meson_dw_hdmi *meson_dw_hdmi)
>>
>> }
>>
>> -static void meson_disable_regulator(void *data)
>> -{
>> - regulator_disable(data);
>> -}
>> -
>> static void meson_disable_clk(void *data)
>> {
>> clk_disable_unprepare(data);
>> @@ -723,20 +717,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>> meson_dw_hdmi->data = match;
>> dw_plat_data = &meson_dw_hdmi->dw_plat_data;
>>
>> - meson_dw_hdmi->hdmi_supply = devm_regulator_get_optional(dev, "hdmi");
>> - if (IS_ERR(meson_dw_hdmi->hdmi_supply)) {
>> - if (PTR_ERR(meson_dw_hdmi->hdmi_supply) == -EPROBE_DEFER)
>> - return -EPROBE_DEFER;
>> - meson_dw_hdmi->hdmi_supply = NULL;
>> - } else {
>> - ret = regulator_enable(meson_dw_hdmi->hdmi_supply);
>> - if (ret)
>> - return ret;
>> - ret = devm_add_action_or_reset(dev, meson_disable_regulator,
>> - meson_dw_hdmi->hdmi_supply);
>> - if (ret)
>> - return ret;
>> - }
>> + ret = devm_regulator_get_enable_optional(dev, "hdmi");
>> + if (ret != -ENODEV)
>
> The above line should be "if (ret < 0)", otherwise it breaks hdmi support.
>
> I've noticed this once this change has been merged to linux-next and all
> my Amlogic Meson based boards failed to initialize HDMI. Is it possible
> to fix this in drm tree or do I need to send the incremental fixup?
Nop, please send an incremental fix and I'll apply it asap.
Thanks,
Neil
>
>> + return ret;
>>
>> meson_dw_hdmi->hdmitx_apb = devm_reset_control_get_exclusive(dev,
>> "hdmitx_apb");
>
> Best regards
Hi Marek & All,
ma 9. tammik. 2023 klo 17.23 Neil Armstrong
([email protected]) kirjoitti:
>
> On 09/01/2023 14:46, Marek Szyprowski wrote:
> > Hi Matti,
> >
> > On 30.11.2022 10:23, Matti Vaittinen wrote:
> >> Simplify using the devm_regulator_get_enable_optional(). Also drop the
> >> now unused struct member 'hdmi_supply'.
> >>
> >> Signed-off-by: Matti Vaittinen <[email protected]>
> >> Martin Blumenstingl <[email protected]>
> >> ---
> >> v4 resend 2:
> >> Respinning unchanged code with the commit title changed as wa suggested
> >> by Robert Foss and commit message changed as was suggested by Martin.
> >>
> >> I am doing a clean-up for my local git and encountered this one.
> >> Respinning as it seems this one fell through the cracks.
> >> ---
> >> drivers/gpu/drm/meson/meson_dw_hdmi.c | 23 +++--------------------
> >> 1 file changed, 3 insertions(+), 20 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> >> index 5cd2b2ebbbd3..7642f740272b 100644
> >> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> >> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> >> @@ -140,7 +140,6 @@ struct meson_dw_hdmi {
> >> struct reset_control *hdmitx_apb;
> >> struct reset_control *hdmitx_ctrl;
> >> struct reset_control *hdmitx_phy;
> >> - struct regulator *hdmi_supply;
> >> u32 irq_stat;
> >> struct dw_hdmi *hdmi;
> >> struct drm_bridge *bridge;
> >> @@ -665,11 +664,6 @@ static void meson_dw_hdmi_init(struct meson_dw_hdmi *meson_dw_hdmi)
> >>
> >> }
> >>
> >> -static void meson_disable_regulator(void *data)
> >> -{
> >> - regulator_disable(data);
> >> -}
> >> -
> >> static void meson_disable_clk(void *data)
> >> {
> >> clk_disable_unprepare(data);
> >> @@ -723,20 +717,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
> >> meson_dw_hdmi->data = match;
> >> dw_plat_data = &meson_dw_hdmi->dw_plat_data;
> >>
> >> - meson_dw_hdmi->hdmi_supply = devm_regulator_get_optional(dev, "hdmi");
> >> - if (IS_ERR(meson_dw_hdmi->hdmi_supply)) {
> >> - if (PTR_ERR(meson_dw_hdmi->hdmi_supply) == -EPROBE_DEFER)
> >> - return -EPROBE_DEFER;
> >> - meson_dw_hdmi->hdmi_supply = NULL;
> >> - } else {
> >> - ret = regulator_enable(meson_dw_hdmi->hdmi_supply);
> >> - if (ret)
> >> - return ret;
> >> - ret = devm_add_action_or_reset(dev, meson_disable_regulator,
> >> - meson_dw_hdmi->hdmi_supply);
> >> - if (ret)
> >> - return ret;
> >> - }
> >> + ret = devm_regulator_get_enable_optional(dev, "hdmi");
> >> + if (ret != -ENODEV)
> >
> > The above line should be "if (ret < 0)", otherwise it breaks hdmi support.
> >
Sorry for the trouble and thanks for pointing this out! I believe the
condition I was looking for was
if (ret && ret != -ENODEV).
At least in my eyes the use of regulator_get_optional() sounds like
the -ENODEV should not be treated as an error. The obvious mistake is
regarding return value 0 as such. Thanks for spotting this!
> > I've noticed this once this change has been merged to linux-next and all
> > my Amlogic Meson based boards failed to initialize HDMI. Is it possible
> > to fix this in drm tree or do I need to send the incremental fixup?
>
> Nop, please send an incremental fix and I'll apply it asap.
Thanks for cleaning-up the mess I caused Marek! Please, let me know if
you want me to cook the fix.
Yours,
- -Matti
--
Matti Vaittinen
Linux kernel developer at ROHM Semiconductors
Oulu Finland
~~ When things go utterly wrong vim users can always type :help! ~~
Discuss - Estimate - Plan - Report and finally accomplish this:
void do_work(int time) __attribute__ ((const));