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Message-Id: <1460661464-11216-24-git-send-email-boris.brezillon@free-electrons.com>
Date: Thu, 14 Apr 2016 21:17:43 +0200
From: Boris Brezillon <boris.brezillon@...e-electrons.com>
To: Thierry Reding <thierry.reding@...il.com>,
linux-pwm@...r.kernel.org
Cc: Mike Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...eaurora.org>, linux-clk@...r.kernel.org,
Mark Brown <broonie@...nel.org>,
Liam Girdwood <lgirdwood@...il.com>,
Kamil Debski <k.debski@...sung.com>, lm-sensors@...sensors.org,
Jean Delvare <jdelvare@...e.com>,
Guenter Roeck <linux@...ck-us.net>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
linux-input@...r.kernel.org, Bryan Wu <cooloney@...il.com>,
Richard Purdie <rpurdie@...ys.net>,
Jacek Anaszewski <j.anaszewski@...sung.com>,
linux-leds@...r.kernel.org,
Maxime Ripard <maxime.ripard@...e-electrons.com>,
Chen-Yu Tsai <wens@...e.org>, linux-sunxi@...glegroups.com,
Joachim Eastwood <manabian@...il.com>,
Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
Heiko Stuebner <heiko@...ech.de>,
linux-rockchip@...ts.infradead.org,
Jingoo Han <jingoohan1@...il.com>,
Lee Jones <lee.jones@...aro.org>, linux-fbdev@...r.kernel.org,
Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
Tomi Valkeinen <tomi.valkeinen@...com>,
Robert Jarzmik <robert.jarzmik@...e.fr>,
Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
Kukjin Kim <kgene@...nel.org>,
Krzysztof Kozlowski <k.kozlowski@...sung.com>,
linux-samsung-soc@...r.kernel.org, intel-gfx@...ts.freedesktop.org,
Daniel Vetter <daniel.vetter@...el.com>,
Jani Nikula <jani.nikula@...ux.intel.com>,
Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Hartley Sweeten <hsweeten@...ionengravers.com>,
Ryan Mallon <rmallon@...il.com>,
Alexander Shiyan <shc_work@...l.ru>,
Milo Kim <milo.kim@...com>,
Doug Anderson <dianders@...gle.com>,
Caesar Wang <wxt@...k-chips.com>,
Stephen Barber <smbarber@...omium.org>,
Boris Brezillon <boris.brezillon@...e-electrons.com>
Subject: [PATCH v5 23/24] pwm: switch to the atomic API
Replace legacy pwm_get/set_xxx() and pwm_config/enable/disable() calls
by pwm_get/apply_state().
Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
---
drivers/pwm/core.c | 5 ++++-
drivers/pwm/sysfs.c | 61 +++++++++++++++++++++++++++++++----------------------
2 files changed, 40 insertions(+), 26 deletions(-)
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 112a696..aefffcf 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -947,13 +947,16 @@ static void pwm_dbg_show(struct pwm_chip *chip, struct seq_file *s)
for (i = 0; i < chip->npwm; i++) {
struct pwm_device *pwm = &chip->pwms[i];
+ struct pwm_state state;
+
+ pwm_get_state(pwm, &state);
seq_printf(s, " pwm-%-3d (%-20.20s):", i, pwm->label);
if (test_bit(PWMF_REQUESTED, &pwm->flags))
seq_puts(s, " requested");
- if (pwm_is_enabled(pwm))
+ if (state.enabled)
seq_puts(s, " enabled");
seq_puts(s, "\n");
diff --git a/drivers/pwm/sysfs.c b/drivers/pwm/sysfs.c
index ab28c89..40daf1c 100644
--- a/drivers/pwm/sysfs.c
+++ b/drivers/pwm/sysfs.c
@@ -47,13 +47,13 @@ static ssize_t period_show(struct device *child,
{
struct pwm_export *export = child_to_pwm_export(child);
const struct pwm_device *pwm = export->pwm;
- unsigned int period;
+ struct pwm_state state;
mutex_lock(&export->lock);
- period = pwm_get_period(pwm);
+ pwm_get_state(pwm, &state);
mutex_unlock(&export->lock);
- return sprintf(buf, "%u\n", period);
+ return sprintf(buf, "%u\n", state.period);
}
static ssize_t period_store(struct device *child,
@@ -62,6 +62,7 @@ static ssize_t period_store(struct device *child,
{
struct pwm_export *export = child_to_pwm_export(child);
struct pwm_device *pwm = export->pwm;
+ struct pwm_state state;
unsigned int val;
int ret;
@@ -70,7 +71,9 @@ static ssize_t period_store(struct device *child,
return ret;
mutex_lock(&export->lock);
- ret = pwm_config(pwm, pwm_get_duty_cycle(pwm), val);
+ pwm_get_state(pwm, &state);
+ state.period = val;
+ ret = pwm_apply_state(pwm, &state);
mutex_unlock(&export->lock);
return ret ? : size;
@@ -82,13 +85,13 @@ static ssize_t duty_cycle_show(struct device *child,
{
struct pwm_export *export = child_to_pwm_export(child);
const struct pwm_device *pwm = export->pwm;
- unsigned int duty;
+ struct pwm_state state;
mutex_lock(&export->lock);
- duty = pwm_get_duty_cycle(pwm);
+ pwm_get_state(pwm, &state);
mutex_unlock(&export->lock);
- return sprintf(buf, "%u\n", duty);
+ return sprintf(buf, "%u\n", state.duty_cycle);
}
static ssize_t duty_cycle_store(struct device *child,
@@ -97,6 +100,7 @@ static ssize_t duty_cycle_store(struct device *child,
{
struct pwm_export *export = child_to_pwm_export(child);
struct pwm_device *pwm = export->pwm;
+ struct pwm_state state;
unsigned int val;
int ret;
@@ -105,7 +109,9 @@ static ssize_t duty_cycle_store(struct device *child,
return ret;
mutex_lock(&export->lock);
- ret = pwm_config(pwm, val, pwm_get_period(pwm));
+ pwm_get_state(pwm, &state);
+ state.duty_cycle = val;
+ ret = pwm_apply_state(pwm, &state);
mutex_unlock(&export->lock);
return ret ? : size;
@@ -117,13 +123,13 @@ static ssize_t enable_show(struct device *child,
{
struct pwm_export *export = child_to_pwm_export(child);
const struct pwm_device *pwm = export->pwm;
- bool enabled;
+ struct pwm_state state;
mutex_lock(&export->lock);
- enabled = pwm_is_enabled(pwm);
+ pwm_get_state(pwm, &state);
mutex_unlock(&export->lock);
- return sprintf(buf, "%d\n", enabled);
+ return sprintf(buf, "%d\n", state.enabled);
}
static ssize_t enable_store(struct device *child,
@@ -132,24 +138,20 @@ static ssize_t enable_store(struct device *child,
{
struct pwm_export *export = child_to_pwm_export(child);
struct pwm_device *pwm = export->pwm;
+ struct pwm_state state;
int val, ret;
ret = kstrtoint(buf, 0, &val);
if (ret)
return ret;
+ if (val != 0 && val != 1)
+ return -EINVAL;
+
mutex_lock(&export->lock);
- switch (val) {
- case 0:
- pwm_disable(pwm);
- break;
- case 1:
- ret = pwm_enable(pwm);
- break;
- default:
- ret = -EINVAL;
- break;
- }
+ pwm_get_state(pwm, &state);
+ state.enabled = val;
+ ret = pwm_apply_state(pwm, &state);
mutex_unlock(&export->lock);
return ret ? : size;
@@ -162,9 +164,13 @@ static ssize_t polarity_show(struct device *child,
struct pwm_export *export = child_to_pwm_export(child);
const struct pwm_device *pwm = export->pwm;
const char *polarity = "unknown";
+ struct pwm_state state;
mutex_lock(&export->lock);
- switch (pwm_get_polarity(pwm)) {
+ pwm_get_state(pwm, &state);
+ mutex_unlock(&export->lock);
+
+ switch (state.polarity) {
case PWM_POLARITY_NORMAL:
polarity = "normal";
break;
@@ -173,7 +179,6 @@ static ssize_t polarity_show(struct device *child,
polarity = "inversed";
break;
}
- mutex_unlock(&export->lock);
return sprintf(buf, "%s\n", polarity);
}
@@ -185,6 +190,7 @@ static ssize_t polarity_store(struct device *child,
struct pwm_export *export = child_to_pwm_export(child);
struct pwm_device *pwm = export->pwm;
enum pwm_polarity polarity;
+ struct pwm_state state;
int ret;
if (sysfs_streq(buf, "normal"))
@@ -195,7 +201,12 @@ static ssize_t polarity_store(struct device *child,
return -EINVAL;
mutex_lock(&export->lock);
- ret = pwm_set_polarity(pwm, polarity);
+ pwm_get_state(pwm, &state);
+ state.polarity = polarity;
+ if (state.enabled)
+ ret = -EBUSY;
+ else
+ ret = pwm_apply_state(pwm, &state);
mutex_unlock(&export->lock);
return ret ? : size;
--
2.5.0
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