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Code Issues Releases Wiki Activity

pwm: Drop useless member .of_pwm_n_cells of struct pwm_chip

Browse source 
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@chromium.org>
Link: https://lore.kernel.org/r/53d8c545aa8f79a920358be9e72e382b3981bdc4.1704835845.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
This commit is contained in:
Uwe Kleine-König 2024-01-09 22:34:32 +01:00
parent 7cfce2b80d
commit 4e77431cda
6 changed files with 4 additions and 27 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/gpu/drm/bridge/ti-sn65dsi86.c
View file

@ -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);

22
drivers/pwm/core.c
View file

@ -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);
}

1
drivers/pwm/pwm-clps711x.c
View file

@ -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);

1
drivers/pwm/pwm-cros-ec.c
View file

@ -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;

4
drivers/pwm/pwm-pxa.c
View file

@ -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))

2
include/linux/pwm.h
View file

@ -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 */