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-rw-r--r--drivers/acpi/acpi_lpss.c14
-rw-r--r--drivers/leds/leds-pwm.c16
-rw-r--r--drivers/pwm/core.c70
-rw-r--r--drivers/pwm/pwm-atmel-hlcdc.c1
-rw-r--r--drivers/pwm/pwm-atmel.c1
-rw-r--r--drivers/pwm/pwm-bcm-kona.c1
-rw-r--r--drivers/pwm/pwm-berlin.c1
-rw-r--r--drivers/pwm/pwm-brcmstb.c1
-rw-r--r--drivers/pwm/pwm-fsl-ftm.c1
-rw-r--r--drivers/pwm/pwm-imx.c1
-rw-r--r--drivers/pwm/pwm-lp3943.c1
-rw-r--r--drivers/pwm/pwm-mxs.c2
-rw-r--r--drivers/pwm/pwm-pca9685.c1
-rw-r--r--drivers/pwm/pwm-sti.c1
-rw-r--r--drivers/pwm/pwm-sun4i.c1
-rw-r--r--drivers/pwm/pwm-twl-led.c1
-rw-r--r--drivers/pwm/pwm-twl.c1
-rw-r--r--drivers/staging/greybus/pwm.c1
18 files changed, 54 insertions, 62 deletions
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 8ea836c046f8..cd5d2b6c9ed1 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -20,6 +20,7 @@
#include <linux/platform_data/clk-lpss.h>
#include <linux/pm_domain.h>
#include <linux/pm_runtime.h>
+#include <linux/pwm.h>
#include <linux/delay.h>
#include "internal.h"
@@ -154,6 +155,18 @@ static void byt_i2c_setup(struct lpss_private_data *pdata)
writel(0, pdata->mmio_base + LPSS_I2C_ENABLE);
}
+/* BSW PWM used for backlight control by the i915 driver */
+static struct pwm_lookup bsw_pwm_lookup[] = {
+ PWM_LOOKUP_WITH_MODULE("80862288:00", 0, "0000:00:02.0",
+ "pwm_backlight", 0, PWM_POLARITY_NORMAL,
+ "pwm-lpss-platform"),
+};
+
+static void bsw_pwm_setup(struct lpss_private_data *pdata)
+{
+ pwm_add_table(bsw_pwm_lookup, ARRAY_SIZE(bsw_pwm_lookup));
+}
+
static const struct lpss_device_desc lpt_dev_desc = {
.flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_LTR,
.prv_offset = 0x800,
@@ -191,6 +204,7 @@ static const struct lpss_device_desc byt_pwm_dev_desc = {
static const struct lpss_device_desc bsw_pwm_dev_desc = {
.flags = LPSS_SAVE_CTX | LPSS_NO_D3_DELAY,
+ .setup = bsw_pwm_setup,
};
static const struct lpss_device_desc byt_uart_dev_desc = {
diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c
index a9145aa7f36a..8d456dc6c5bf 100644
--- a/drivers/leds/leds-pwm.c
+++ b/drivers/leds/leds-pwm.c
@@ -29,7 +29,6 @@ struct led_pwm_data {
unsigned int active_low;
unsigned int period;
int duty;
- bool can_sleep;
};
struct led_pwm_priv {
@@ -49,8 +48,8 @@ static void __led_pwm_set(struct led_pwm_data *led_dat)
pwm_enable(led_dat->pwm);
}
-static void led_pwm_set(struct led_classdev *led_cdev,
- enum led_brightness brightness)
+static int led_pwm_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
{
struct led_pwm_data *led_dat =
container_of(led_cdev, struct led_pwm_data, cdev);
@@ -66,12 +65,7 @@ static void led_pwm_set(struct led_classdev *led_cdev,
led_dat->duty = duty;
__led_pwm_set(led_dat);
-}
-static int led_pwm_set_blocking(struct led_classdev *led_cdev,
- enum led_brightness brightness)
-{
- led_pwm_set(led_cdev, brightness);
return 0;
}
@@ -112,11 +106,7 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv,
return ret;
}
- led_data->can_sleep = pwm_can_sleep(led_data->pwm);
- if (!led_data->can_sleep)
- led_data->cdev.brightness_set = led_pwm_set;
- else
- led_data->cdev.brightness_set_blocking = led_pwm_set_blocking;
+ led_data->cdev.brightness_set_blocking = led_pwm_set;
/*
* FIXME: pwm_apply_args() should be removed when switching to the
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 172ef8245811..a0860b30bd93 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -137,9 +137,14 @@ of_pwm_xlate_with_flags(struct pwm_chip *pc, const struct of_phandle_args *args)
{
struct pwm_device *pwm;
+ /* check, whether the driver supports a third cell for flags */
if (pc->of_pwm_n_cells < 3)
return ERR_PTR(-EINVAL);
+ /* flags in the third cell are optional */
+ if (args->args_count < 2)
+ return ERR_PTR(-EINVAL);
+
if (args->args[0] >= pc->npwm)
return ERR_PTR(-EINVAL);
@@ -148,11 +153,10 @@ of_pwm_xlate_with_flags(struct pwm_chip *pc, const struct of_phandle_args *args)
return pwm;
pwm->args.period = args->args[1];
+ pwm->args.polarity = PWM_POLARITY_NORMAL;
- if (args->args[2] & PWM_POLARITY_INVERTED)
+ if (args->args_count > 2 && args->args[2] & PWM_POLARITY_INVERTED)
pwm->args.polarity = PWM_POLARITY_INVERSED;
- else
- pwm->args.polarity = PWM_POLARITY_NORMAL;
return pwm;
}
@@ -163,9 +167,14 @@ 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);
@@ -663,24 +672,17 @@ struct pwm_device *of_pwm_get(struct device_node *np, const char *con_id)
err = of_parse_phandle_with_args(np, "pwms", "#pwm-cells", index,
&args);
if (err) {
- pr_debug("%s(): can't parse \"pwms\" property\n", __func__);
+ pr_err("%s(): can't parse \"pwms\" property\n", __func__);
return ERR_PTR(err);
}
pc = of_node_to_pwmchip(args.np);
if (IS_ERR(pc)) {
- pr_debug("%s(): PWM chip not found\n", __func__);
+ pr_err("%s(): PWM chip not found\n", __func__);
pwm = ERR_CAST(pc);
goto put;
}
- if (args.args_count != pc->of_pwm_n_cells) {
- pr_debug("%s: wrong #pwm-cells for %s\n", np->full_name,
- args.np->full_name);
- pwm = ERR_PTR(-EINVAL);
- goto put;
- }
-
pwm = pc->of_xlate(pc, &args);
if (IS_ERR(pwm))
goto put;
@@ -757,12 +759,13 @@ void pwm_remove_table(struct pwm_lookup *table, size_t num)
*/
struct pwm_device *pwm_get(struct device *dev, const char *con_id)
{
- struct pwm_device *pwm = ERR_PTR(-EPROBE_DEFER);
const char *dev_id = dev ? dev_name(dev) : NULL;
- struct pwm_chip *chip = NULL;
+ struct pwm_device *pwm;
+ struct pwm_chip *chip;
unsigned int best = 0;
struct pwm_lookup *p, *chosen = NULL;
unsigned int match;
+ int err;
/* look up via DT first */
if (IS_ENABLED(CONFIG_OF) && dev && dev->of_node)
@@ -817,24 +820,35 @@ struct pwm_device *pwm_get(struct device *dev, const char *con_id)
}
}
- if (!chosen) {
- pwm = ERR_PTR(-ENODEV);
- goto out;
- }
+ mutex_unlock(&pwm_lookup_lock);
+
+ if (!chosen)
+ return ERR_PTR(-ENODEV);
chip = pwmchip_find_by_name(chosen->provider);
+
+ /*
+ * If the lookup entry specifies a module, load the module and retry
+ * the PWM chip lookup. This can be used to work around driver load
+ * ordering issues if driver's can't be made to properly support the
+ * deferred probe mechanism.
+ */
+ if (!chip && chosen->module) {
+ err = request_module(chosen->module);
+ if (err == 0)
+ chip = pwmchip_find_by_name(chosen->provider);
+ }
+
if (!chip)
- goto out;
+ return ERR_PTR(-EPROBE_DEFER);
pwm = pwm_request_from_chip(chip, chosen->index, con_id ?: dev_id);
if (IS_ERR(pwm))
- goto out;
+ return pwm;
pwm->args.period = chosen->period;
pwm->args.polarity = chosen->polarity;
-out:
- mutex_unlock(&pwm_lookup_lock);
return pwm;
}
EXPORT_SYMBOL_GPL(pwm_get);
@@ -960,18 +974,6 @@ void devm_pwm_put(struct device *dev, struct pwm_device *pwm)
}
EXPORT_SYMBOL_GPL(devm_pwm_put);
-/**
- * pwm_can_sleep() - report whether PWM access will sleep
- * @pwm: PWM device
- *
- * Returns: True if accessing the PWM can sleep, false otherwise.
- */
-bool pwm_can_sleep(struct pwm_device *pwm)
-{
- return true;
-}
-EXPORT_SYMBOL_GPL(pwm_can_sleep);
-
#ifdef CONFIG_DEBUG_FS
static void pwm_dbg_show(struct pwm_chip *chip, struct seq_file *s)
{
diff --git a/drivers/pwm/pwm-atmel-hlcdc.c b/drivers/pwm/pwm-atmel-hlcdc.c
index 14fc011faa32..999187277ea5 100644
--- a/drivers/pwm/pwm-atmel-hlcdc.c
+++ b/drivers/pwm/pwm-atmel-hlcdc.c
@@ -270,7 +270,6 @@ static int atmel_hlcdc_pwm_probe(struct platform_device *pdev)
chip->chip.npwm = 1;
chip->chip.of_xlate = of_pwm_xlate_with_flags;
chip->chip.of_pwm_n_cells = 3;
- chip->chip.can_sleep = 1;
ret = pwmchip_add_with_polarity(&chip->chip, PWM_POLARITY_INVERSED);
if (ret) {
diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c
index e6b8b1b7e6ba..67a7023be5c2 100644
--- a/drivers/pwm/pwm-atmel.c
+++ b/drivers/pwm/pwm-atmel.c
@@ -385,7 +385,6 @@ static int atmel_pwm_probe(struct platform_device *pdev)
atmel_pwm->chip.base = -1;
atmel_pwm->chip.npwm = 4;
- atmel_pwm->chip.can_sleep = true;
atmel_pwm->config = data->config;
atmel_pwm->updated_pwms = 0;
mutex_init(&atmel_pwm->isr_lock);
diff --git a/drivers/pwm/pwm-bcm-kona.c b/drivers/pwm/pwm-bcm-kona.c
index c63418322023..09a95aeb3a70 100644
--- a/drivers/pwm/pwm-bcm-kona.c
+++ b/drivers/pwm/pwm-bcm-kona.c
@@ -276,7 +276,6 @@ static int kona_pwmc_probe(struct platform_device *pdev)
kp->chip.npwm = 6;
kp->chip.of_xlate = of_pwm_xlate_with_flags;
kp->chip.of_pwm_n_cells = 3;
- kp->chip.can_sleep = true;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
kp->base = devm_ioremap_resource(&pdev->dev, res);
diff --git a/drivers/pwm/pwm-berlin.c b/drivers/pwm/pwm-berlin.c
index 01339c152ab0..771859aca4be 100644
--- a/drivers/pwm/pwm-berlin.c
+++ b/drivers/pwm/pwm-berlin.c
@@ -206,7 +206,6 @@ static int berlin_pwm_probe(struct platform_device *pdev)
pwm->chip.ops = &berlin_pwm_ops;
pwm->chip.base = -1;
pwm->chip.npwm = 4;
- pwm->chip.can_sleep = true;
pwm->chip.of_xlate = of_pwm_xlate_with_flags;
pwm->chip.of_pwm_n_cells = 3;
diff --git a/drivers/pwm/pwm-brcmstb.c b/drivers/pwm/pwm-brcmstb.c
index 5d5adee16886..8063cffa1c96 100644
--- a/drivers/pwm/pwm-brcmstb.c
+++ b/drivers/pwm/pwm-brcmstb.c
@@ -270,7 +270,6 @@ static int brcmstb_pwm_probe(struct platform_device *pdev)
p->chip.ops = &brcmstb_pwm_ops;
p->chip.base = -1;
p->chip.npwm = 2;
- p->chip.can_sleep = true;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
p->base = devm_ioremap_resource(&pdev->dev, res);
diff --git a/drivers/pwm/pwm-fsl-ftm.c b/drivers/pwm/pwm-fsl-ftm.c
index fad968eb75f6..557b4ea16796 100644
--- a/drivers/pwm/pwm-fsl-ftm.c
+++ b/drivers/pwm/pwm-fsl-ftm.c
@@ -446,7 +446,6 @@ static int fsl_pwm_probe(struct platform_device *pdev)
fpc->chip.of_pwm_n_cells = 3;
fpc->chip.base = -1;
fpc->chip.npwm = 8;
- fpc->chip.can_sleep = true;
ret = pwmchip_add(&fpc->chip);
if (ret < 0) {
diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
index 957099e82ed3..2ba5c3a398ff 100644
--- a/drivers/pwm/pwm-imx.c
+++ b/drivers/pwm/pwm-imx.c
@@ -289,7 +289,6 @@ static int imx_pwm_probe(struct platform_device *pdev)
imx->chip.dev = &pdev->dev;
imx->chip.base = -1;
imx->chip.npwm = 1;
- imx->chip.can_sleep = true;
if (data->polarity_supported) {
dev_dbg(&pdev->dev, "PWM supports output inversion\n");
diff --git a/drivers/pwm/pwm-lp3943.c b/drivers/pwm/pwm-lp3943.c
index 872ea76a4f19..52584e9962ed 100644
--- a/drivers/pwm/pwm-lp3943.c
+++ b/drivers/pwm/pwm-lp3943.c
@@ -278,7 +278,6 @@ static int lp3943_pwm_probe(struct platform_device *pdev)
lp3943_pwm->chip.dev = &pdev->dev;
lp3943_pwm->chip.ops = &lp3943_pwm_ops;
lp3943_pwm->chip.npwm = LP3943_NUM_PWMS;
- lp3943_pwm->chip.can_sleep = true;
platform_set_drvdata(pdev, lp3943_pwm);
diff --git a/drivers/pwm/pwm-mxs.c b/drivers/pwm/pwm-mxs.c
index 9a596324ebef..a6017ad9926c 100644
--- a/drivers/pwm/pwm-mxs.c
+++ b/drivers/pwm/pwm-mxs.c
@@ -151,7 +151,7 @@ static int mxs_pwm_probe(struct platform_device *pdev)
mxs->chip.dev = &pdev->dev;
mxs->chip.ops = &mxs_pwm_ops;
mxs->chip.base = -1;
- mxs->chip.can_sleep = true;
+
ret = of_property_read_u32(np, "fsl,pwm-number", &mxs->chip.npwm);
if (ret < 0) {
dev_err(&pdev->dev, "failed to get pwm number: %d\n", ret);
diff --git a/drivers/pwm/pwm-pca9685.c b/drivers/pwm/pwm-pca9685.c
index 5566760f7dc4..0cfb3571a732 100644
--- a/drivers/pwm/pwm-pca9685.c
+++ b/drivers/pwm/pwm-pca9685.c
@@ -486,7 +486,6 @@ static int pca9685_pwm_probe(struct i2c_client *client,
pca->chip.dev = &client->dev;
pca->chip.base = -1;
- pca->chip.can_sleep = true;
ret = pwmchip_add(&pca->chip);
if (ret < 0)
diff --git a/drivers/pwm/pwm-sti.c b/drivers/pwm/pwm-sti.c
index dd82dc840af9..2b7c31c9d1ab 100644
--- a/drivers/pwm/pwm-sti.c
+++ b/drivers/pwm/pwm-sti.c
@@ -635,7 +635,6 @@ skip_cpt:
pc->chip.ops = &sti_pwm_ops;
pc->chip.base = -1;
pc->chip.npwm = pc->cdata->pwm_num_devs;
- pc->chip.can_sleep = true;
ret = pwmchip_add(&pc->chip);
if (ret < 0) {
diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c
index b0803f6c64d9..1284ffa05921 100644
--- a/drivers/pwm/pwm-sun4i.c
+++ b/drivers/pwm/pwm-sun4i.c
@@ -340,7 +340,6 @@ static int sun4i_pwm_probe(struct platform_device *pdev)
pwm->chip.ops = &sun4i_pwm_ops;
pwm->chip.base = -1;
pwm->chip.npwm = pwm->data->npwm;
- pwm->chip.can_sleep = true;
pwm->chip.of_xlate = of_pwm_xlate_with_flags;
pwm->chip.of_pwm_n_cells = 3;
diff --git a/drivers/pwm/pwm-twl-led.c b/drivers/pwm/pwm-twl-led.c
index b964470025c5..21eff991d0e3 100644
--- a/drivers/pwm/pwm-twl-led.c
+++ b/drivers/pwm/pwm-twl-led.c
@@ -303,7 +303,6 @@ static int twl_pwmled_probe(struct platform_device *pdev)
twl->chip.dev = &pdev->dev;
twl->chip.base = -1;
- twl->chip.can_sleep = true;
mutex_init(&twl->mutex);
diff --git a/drivers/pwm/pwm-twl.c b/drivers/pwm/pwm-twl.c
index 7a993b056638..9de617b76680 100644
--- a/drivers/pwm/pwm-twl.c
+++ b/drivers/pwm/pwm-twl.c
@@ -323,7 +323,6 @@ static int twl_pwm_probe(struct platform_device *pdev)
twl->chip.dev = &pdev->dev;
twl->chip.base = -1;
twl->chip.npwm = 2;
- twl->chip.can_sleep = true;
mutex_init(&twl->mutex);
diff --git a/drivers/staging/greybus/pwm.c b/drivers/staging/greybus/pwm.c
index c4bf3298ba07..f0404bc37123 100644
--- a/drivers/staging/greybus/pwm.c
+++ b/drivers/staging/greybus/pwm.c
@@ -284,7 +284,6 @@ static int gb_pwm_probe(struct gbphy_device *gbphy_dev,
pwm->ops = &gb_pwm_ops;
pwm->base = -1; /* Allocate base dynamically */
pwm->npwm = pwmc->pwm_max + 1;
- pwm->can_sleep = true; /* FIXME */
ret = pwmchip_add(pwm);
if (ret) {
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-06 09:57:21 +0300