This is a note to let you know that I've just added the patch titled
pwm: Drop useless member .of_pwm_n_cells of struct pwm_chip
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pwm-drop-useless-member-.of_pwm_n_cells-of-struct-pw.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 1bcda8bb43067813132da1677d5bf03f06d20c42
Author: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Date: Tue Jan 9 22:34:32 2024 +0100
pwm: Drop useless member .of_pwm_n_cells of struct pwm_chip
[ Upstream commit 4e77431cda4973f03d063c47f6ea313dfceebf16 ]
Apart from the two of_xlate implementations this member is write-only.
In the of_xlate functions of_pwm_xlate_with_flags() and
of_pwm_single_xlate() it's more sensible to check for args->args_count
because this is what is actually used in the device tree.
Acked-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/53d8c545aa8f79a920358be9e72e382b3981bdc4.1704835845.git.u.kleine-koenig@xxxxxxxxxxxxxx
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Stable-dep-of: 3e551115aee0 ("pwm: meson: Add check for error from clk_round_rate()")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index 62cc3893dca5d..1f6e929c2f6a3 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -1591,7 +1591,6 @@ static int ti_sn_pwm_probe(struct auxiliary_device *adev,
pdata->pchip.ops = &ti_sn_pwm_ops;
pdata->pchip.npwm = 1;
pdata->pchip.of_xlate = of_pwm_single_xlate;
- pdata->pchip.of_pwm_n_cells = 1;
devm_pm_runtime_enable(&adev->dev);
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index f2728ee787d7a..31f210872a079 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -107,9 +107,6 @@ of_pwm_xlate_with_flags(struct pwm_chip *chip, const struct of_phandle_args *arg
{
struct pwm_device *pwm;
- if (chip->of_pwm_n_cells < 2)
- return ERR_PTR(-EINVAL);
-
/* flags in the third cell are optional */
if (args->args_count < 2)
return ERR_PTR(-EINVAL);
@@ -124,10 +121,8 @@ of_pwm_xlate_with_flags(struct pwm_chip *chip, const struct of_phandle_args *arg
pwm->args.period = args->args[1];
pwm->args.polarity = PWM_POLARITY_NORMAL;
- if (chip->of_pwm_n_cells >= 3) {
- if (args->args_count > 2 && args->args[2] & PWM_POLARITY_INVERTED)
- pwm->args.polarity = PWM_POLARITY_INVERSED;
- }
+ if (args->args_count > 2 && args->args[2] & PWM_POLARITY_INVERTED)
+ pwm->args.polarity = PWM_POLARITY_INVERSED;
return pwm;
}
@@ -138,9 +133,6 @@ of_pwm_single_xlate(struct pwm_chip *chip, const struct of_phandle_args *args)
{
struct pwm_device *pwm;
- if (chip->of_pwm_n_cells < 1)
- return ERR_PTR(-EINVAL);
-
/* validate that one cell is specified, optionally with flags */
if (args->args_count != 1 && args->args_count != 2)
return ERR_PTR(-EINVAL);
@@ -164,16 +156,8 @@ static void of_pwmchip_add(struct pwm_chip *chip)
if (!chip->dev || !chip->dev->of_node)
return;
- if (!chip->of_xlate) {
- u32 pwm_cells;
-
- if (of_property_read_u32(chip->dev->of_node, "#pwm-cells",
- &pwm_cells))
- pwm_cells = 2;
-
+ if (!chip->of_xlate)
chip->of_xlate = of_pwm_xlate_with_flags;
- chip->of_pwm_n_cells = pwm_cells;
- }
of_node_get(chip->dev->of_node);
}
diff --git a/drivers/pwm/pwm-clps711x.c b/drivers/pwm/pwm-clps711x.c
index 42179b3f7ec39..06562d4bb9633 100644
--- a/drivers/pwm/pwm-clps711x.c
+++ b/drivers/pwm/pwm-clps711x.c
@@ -103,7 +103,6 @@ static int clps711x_pwm_probe(struct platform_device *pdev)
priv->chip.dev = &pdev->dev;
priv->chip.npwm = 2;
priv->chip.of_xlate = clps711x_pwm_xlate;
- priv->chip.of_pwm_n_cells = 1;
spin_lock_init(&priv->lock);
diff --git a/drivers/pwm/pwm-cros-ec.c b/drivers/pwm/pwm-cros-ec.c
index 5fe303b8656de..339cedf3a7b18 100644
--- a/drivers/pwm/pwm-cros-ec.c
+++ b/drivers/pwm/pwm-cros-ec.c
@@ -279,7 +279,6 @@ static int cros_ec_pwm_probe(struct platform_device *pdev)
chip->dev = dev;
chip->ops = &cros_ec_pwm_ops;
chip->of_xlate = cros_ec_pwm_xlate;
- chip->of_pwm_n_cells = 1;
if (ec_pwm->use_pwm_type) {
chip->npwm = CROS_EC_PWM_DT_COUNT;
diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c
index 76685f926c758..61b74fa1d3481 100644
--- a/drivers/pwm/pwm-pxa.c
+++ b/drivers/pwm/pwm-pxa.c
@@ -180,10 +180,8 @@ static int pwm_probe(struct platform_device *pdev)
pc->chip.ops = &pxa_pwm_ops;
pc->chip.npwm = (id->driver_data & HAS_SECONDARY_PWM) ? 2 : 1;
- if (IS_ENABLED(CONFIG_OF)) {
+ if (IS_ENABLED(CONFIG_OF))
pc->chip.of_xlate = of_pwm_single_xlate;
- pc->chip.of_pwm_n_cells = 1;
- }
pc->mmio_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(pc->mmio_base))
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index fcc2c4496f731..8ffe9ae7a23a9 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -271,7 +271,6 @@ struct pwm_ops {
* @id: unique number of this PWM chip
* @npwm: number of PWMs controlled by this chip
* @of_xlate: request a PWM device given a device tree PWM specifier
- * @of_pwm_n_cells: number of cells expected in the device tree PWM specifier
* @atomic: can the driver's ->apply() be called in atomic context
* @pwms: array of PWM devices allocated by the framework
*/
@@ -284,7 +283,6 @@ struct pwm_chip {
struct pwm_device * (*of_xlate)(struct pwm_chip *chip,
const struct of_phandle_args *args);
- unsigned int of_pwm_n_cells;
bool atomic;
/* only used internally by the PWM framework */
