drivers/clocksource/timer-ti-dm.c | 127 ++++++++++++++++++++- include/linux/platform_data/dmtimer-omap.h | 4 + 2 files changed, 129 insertions(+), 2 deletions(-)
Add PWM capture function in DM timer driver.
OMAP DM timer hardware supports capture feature.It can be used to
timestamp events (falling/rising edges) detected on input signal.
Signed-off-by: Gokul Praveen <g-praveen@ti.com>
---
Precondition : Before calling driver API,it is assumed that the
capture signal is active else both duty cycle
and period returned by driver will not be valid.
---
drivers/clocksource/timer-ti-dm.c | 127 ++++++++++++++++++++-
include/linux/platform_data/dmtimer-omap.h | 4 +
2 files changed, 129 insertions(+), 2 deletions(-)
diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index e9e32df6b566..a4bf72c850b5 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -31,6 +31,7 @@
#include <linux/platform_data/dmtimer-omap.h>
#include <clocksource/timer-ti-dm.h>
+#include <linux/delay.h>
/*
* timer errata flags
@@ -836,6 +837,49 @@ static int omap_dm_timer_set_match(struct omap_dm_timer *cookie, int enable,
return 0;
}
+static int omap_dm_timer_set_cap(struct omap_dm_timer *cookie,
+ int autoreload, bool config_period)
+{
+ struct dmtimer *timer;
+ struct device *dev;
+ int rc;
+ u32 l;
+
+ timer = to_dmtimer(cookie);
+ if (unlikely(!timer))
+ return -EINVAL;
+
+ dev = &timer->pdev->dev;
+ rc = pm_runtime_resume_and_get(dev);
+
+ if (rc)
+ return rc;
+ /*
+ * 1. Select autoreload mode. TIMER_TCLR[1] AR bit.
+ * 2. TIMER_TCLR[14]: Sets the functionality of the TIMER IO pin.
+ * 3. TIMER_TCLR[13] : Capture mode select bit.
+ * 3. TIMER_TCLR[9-8] : Select transition capture mode.
+ */
+
+ l = dmtimer_read(timer, OMAP_TIMER_CTRL_REG);
+
+ if (autoreload)
+ l |= OMAP_TIMER_CTRL_AR;
+
+ l |= OMAP_TIMER_CTRL_CAPTMODE | OMAP_TIMER_CTRL_GPOCFG;
+
+ if (config_period == true)
+ l |= OMAP_TIMER_CTRL_TCM_LOWTOHIGH; /*Time Period config*/
+ else
+ l |= OMAP_TIMER_CTRL_TCM_BOTHEDGES; /*Duty Cycle config*/
+
+ dmtimer_write(timer, OMAP_TIMER_CTRL_REG, l);
+
+ pm_runtime_put_sync(dev);
+
+ return 0;
+}
+
static int omap_dm_timer_set_pwm(struct omap_dm_timer *cookie, int def_on,
int toggle, int trigger, int autoreload)
{
@@ -1023,23 +1067,99 @@ static unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *cookie)
return __omap_dm_timer_read_counter(timer);
}
+static inline unsigned int __omap_dm_timer_cap(struct dmtimer *timer, int idx)
+{
+ return idx == 0 ? dmtimer_read(timer, OMAP_TIMER_CAPTURE_REG) :
+ dmtimer_read(timer, OMAP_TIMER_CAPTURE2_REG);
+}
+
static int omap_dm_timer_write_counter(struct omap_dm_timer *cookie, unsigned int value)
{
struct dmtimer *timer;
+ struct device *dev;
timer = to_dmtimer(cookie);
- if (unlikely(!timer || !atomic_read(&timer->enabled))) {
- pr_err("%s: timer not available or enabled.\n", __func__);
+ if (unlikely(!timer)) {
+ pr_err("%s: timer not available.\n", __func__);
return -EINVAL;
}
+ dev = &timer->pdev->dev;
+
+ pm_runtime_resume_and_get(dev);
dmtimer_write(timer, OMAP_TIMER_COUNTER_REG, value);
+ pm_runtime_put_sync(dev);
/* Save the context */
timer->context.tcrr = value;
return 0;
}
+/**
+ * omap_dm_timer_cap_counter() - Calculate the high count or period count depending on the
+ * configuration.
+ * @cookie:Pointer to OMAP DM timer
+ * @is_period:Whether to configure timer in period or duty cycle mode
+ *
+ * Return high count or period count if timer is enabled else appropriate error.
+ */
+static unsigned int omap_dm_timer_cap_counter(struct omap_dm_timer *cookie, bool is_period)
+{
+ struct dmtimer *timer;
+ unsigned int cap1 = 0;
+ unsigned int cap2 = 0;
+ u32 l, ret;
+
+ timer = to_dmtimer(cookie);
+ if (unlikely(!timer || !atomic_read(&timer->enabled))) {
+ pr_err("%s:timer is not available or enabled.%p\n", __func__, (void *)timer);
+ return -EINVAL;
+ }
+
+ /*Stop the timer*/
+ omap_dm_timer_stop(cookie);
+
+ /* Clear the timer counter value to 0 */
+ ret = omap_dm_timer_write_counter(cookie, 0);
+
+ if (ret)
+ return ret;
+
+ /*Sets the timer capture configuration for duty cycle calculation*/
+ if (is_period == false)
+ ret = omap_dm_timer_set_cap(cookie, true, false);
+
+ /*Sets the timer capture configuration for period calculation*/
+ else
+ ret = omap_dm_timer_set_cap(cookie, true, true);
+
+ if (ret) {
+ pr_err("%s: Failed to set timer capture configuration.\n", __func__);
+ return ret;
+ }
+ /*Start the timer*/
+ omap_dm_timer_start(cookie);
+
+ /*
+ * 1 sec delay is given so as to provide
+ * enough time to capture low frequency signals.
+ */
+ msleep(1000);
+
+ cap1 = __omap_dm_timer_cap(timer, 0);
+ cap2 = __omap_dm_timer_cap(timer, 1);
+
+ /*
+ * Clears the TCLR configuration.
+ * The start bit must be set to 1 as the timer is already in start mode.
+ */
+ l = dmtimer_read(timer, OMAP_TIMER_CTRL_REG);
+ l &= ~(0xffff) | 0x1;
+ dmtimer_write(timer, OMAP_TIMER_CTRL_REG, l);
+
+ return (cap2-cap1);
+}
+
static int __maybe_unused omap_dm_timer_runtime_suspend(struct device *dev)
{
struct dmtimer *timer = dev_get_drvdata(dev);
@@ -1246,6 +1366,9 @@ static const struct omap_dm_timer_ops dmtimer_ops = {
.write_counter = omap_dm_timer_write_counter,
.read_status = omap_dm_timer_read_status,
.write_status = omap_dm_timer_write_status,
+ .set_cap = omap_dm_timer_set_cap,
+ .get_cap_status = omap_dm_timer_get_pwm_status,
+ .read_cap = omap_dm_timer_cap_counter,
};
static const struct dmtimer_platform_data omap3plus_pdata = {
diff --git a/include/linux/platform_data/dmtimer-omap.h b/include/linux/platform_data/dmtimer-omap.h
index 95d852aef130..726d89143842 100644
--- a/include/linux/platform_data/dmtimer-omap.h
+++ b/include/linux/platform_data/dmtimer-omap.h
@@ -36,9 +36,13 @@ struct omap_dm_timer_ops {
int (*set_pwm)(struct omap_dm_timer *timer, int def_on,
int toggle, int trigger, int autoreload);
int (*get_pwm_status)(struct omap_dm_timer *timer);
+ int (*set_cap)(struct omap_dm_timer *timer,
+ int autoreload, bool config_period);
+ int (*get_cap_status)(struct omap_dm_timer *timer);
int (*set_prescaler)(struct omap_dm_timer *timer, int prescaler);
unsigned int (*read_counter)(struct omap_dm_timer *timer);
+ unsigned int (*read_cap)(struct omap_dm_timer *timer, bool is_period);
int (*write_counter)(struct omap_dm_timer *timer,
unsigned int value);
unsigned int (*read_status)(struct omap_dm_timer *timer);
--
2.34.1On 8/7/25 7:32 AM, Gokul Praveen wrote:
> Add PWM capture function in DM timer driver.
>
> OMAP DM timer hardware supports capture feature.It can be used to
> timestamp events (falling/rising edges) detected on input signal.
>
> Signed-off-by: Gokul Praveen <g-praveen@ti.com>
> ---
> Precondition : Before calling driver API,it is assumed that the
> capture signal is active else both duty cycle
> and period returned by driver will not be valid.
> ---
> drivers/clocksource/timer-ti-dm.c | 127 ++++++++++++++++++++-
> include/linux/platform_data/dmtimer-omap.h | 4 +
> 2 files changed, 129 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
> index e9e32df6b566..a4bf72c850b5 100644
> --- a/drivers/clocksource/timer-ti-dm.c
> +++ b/drivers/clocksource/timer-ti-dm.c
> @@ -31,6 +31,7 @@
> #include <linux/platform_data/dmtimer-omap.h>
>
> #include <clocksource/timer-ti-dm.h>
> +#include <linux/delay.h>
>
> /*
> * timer errata flags
> @@ -836,6 +837,49 @@ static int omap_dm_timer_set_match(struct omap_dm_timer *cookie, int enable,
> return 0;
> }
>
> +static int omap_dm_timer_set_cap(struct omap_dm_timer *cookie,
> + int autoreload, bool config_period)
> +{
> + struct dmtimer *timer;
> + struct device *dev;
> + int rc;
> + u32 l;
> +
> + timer = to_dmtimer(cookie);
> + if (unlikely(!timer))
> + return -EINVAL;
> +
> + dev = &timer->pdev->dev;
Do this assignment up where the var is declared
> + rc = pm_runtime_resume_and_get(dev);
> +
Extra newline, fix this everywhere
> + if (rc)
> + return rc;
> + /*
> + * 1. Select autoreload mode. TIMER_TCLR[1] AR bit.
> + * 2. TIMER_TCLR[14]: Sets the functionality of the TIMER IO pin.
> + * 3. TIMER_TCLR[13] : Capture mode select bit.
> + * 3. TIMER_TCLR[9-8] : Select transition capture mode.
> + */
> +
> + l = dmtimer_read(timer, OMAP_TIMER_CTRL_REG);
> +
> + if (autoreload)
> + l |= OMAP_TIMER_CTRL_AR;
> +
> + l |= OMAP_TIMER_CTRL_CAPTMODE | OMAP_TIMER_CTRL_GPOCFG;
> +
> + if (config_period == true)
> + l |= OMAP_TIMER_CTRL_TCM_LOWTOHIGH; /*Time Period config*/
Add space around /* xxx */ in your comments, do this everywhere
> + else
> + l |= OMAP_TIMER_CTRL_TCM_BOTHEDGES; /*Duty Cycle config*/
> +
> + dmtimer_write(timer, OMAP_TIMER_CTRL_REG, l);
> +
> + pm_runtime_put_sync(dev);
> +
> + return 0;
> +}
> +
> static int omap_dm_timer_set_pwm(struct omap_dm_timer *cookie, int def_on,
> int toggle, int trigger, int autoreload)
> {
> @@ -1023,23 +1067,99 @@ static unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *cookie)
> return __omap_dm_timer_read_counter(timer);
> }
>
> +static inline unsigned int __omap_dm_timer_cap(struct dmtimer *timer, int idx)
> +{
> + return idx == 0 ? dmtimer_read(timer, OMAP_TIMER_CAPTURE_REG) :
> + dmtimer_read(timer, OMAP_TIMER_CAPTURE2_REG);
> +}
> +
> static int omap_dm_timer_write_counter(struct omap_dm_timer *cookie, unsigned int value)
> {
> struct dmtimer *timer;
> + struct device *dev;
>
> timer = to_dmtimer(cookie);
> - if (unlikely(!timer || !atomic_read(&timer->enabled))) {
> - pr_err("%s: timer not available or enabled.\n", __func__);
> + if (unlikely(!timer)) {
> + pr_err("%s: timer not available.\n", __func__);
> return -EINVAL;
> }
>
> + dev = &timer->pdev->dev;
> +
> + pm_runtime_resume_and_get(dev);
> dmtimer_write(timer, OMAP_TIMER_COUNTER_REG, value);
> + pm_runtime_put_sync(dev);
>
> /* Save the context */
> timer->context.tcrr = value;
> return 0;
> }
>
> +/**
> + * omap_dm_timer_cap_counter() - Calculate the high count or period count depending on the
> + * configuration.
> + * @cookie:Pointer to OMAP DM timer
> + * @is_period:Whether to configure timer in period or duty cycle mode
> + *
> + * Return high count or period count if timer is enabled else appropriate error.
> + */
> +static unsigned int omap_dm_timer_cap_counter(struct omap_dm_timer *cookie, bool is_period)
> +{
> + struct dmtimer *timer;
> + unsigned int cap1 = 0;
> + unsigned int cap2 = 0;
> + u32 l, ret;
> +
> + timer = to_dmtimer(cookie);
> + if (unlikely(!timer || !atomic_read(&timer->enabled))) {
> + pr_err("%s:timer is not available or enabled.%p\n", __func__, (void *)timer);
> + return -EINVAL;
> + }
> +
> + /*Stop the timer*/
> + omap_dm_timer_stop(cookie);
> +
> + /* Clear the timer counter value to 0 */
> + ret = omap_dm_timer_write_counter(cookie, 0);
> +
> + if (ret)
> + return ret;
> +
> + /*Sets the timer capture configuration for duty cycle calculation*/
> + if (is_period == false)
> + ret = omap_dm_timer_set_cap(cookie, true, false);
> +
> + /*Sets the timer capture configuration for period calculation*/
> + else
> + ret = omap_dm_timer_set_cap(cookie, true, true);
> +
The above 8 lines could just be:
ret = omap_dm_timer_set_cap(cookie, true, is_period);
Andrew
> + if (ret) {
> + pr_err("%s: Failed to set timer capture configuration.\n", __func__);
> + return ret;
> + }
> + /*Start the timer*/
> + omap_dm_timer_start(cookie);
> +
> + /*
> + * 1 sec delay is given so as to provide
> + * enough time to capture low frequency signals.
> + */
> + msleep(1000);
> +
> + cap1 = __omap_dm_timer_cap(timer, 0);
> + cap2 = __omap_dm_timer_cap(timer, 1);
> +
> + /*
> + * Clears the TCLR configuration.
> + * The start bit must be set to 1 as the timer is already in start mode.
> + */
> + l = dmtimer_read(timer, OMAP_TIMER_CTRL_REG);
> + l &= ~(0xffff) | 0x1;
> + dmtimer_write(timer, OMAP_TIMER_CTRL_REG, l);
> +
> + return (cap2-cap1);
> +}
> +
> static int __maybe_unused omap_dm_timer_runtime_suspend(struct device *dev)
> {
> struct dmtimer *timer = dev_get_drvdata(dev);
> @@ -1246,6 +1366,9 @@ static const struct omap_dm_timer_ops dmtimer_ops = {
> .write_counter = omap_dm_timer_write_counter,
> .read_status = omap_dm_timer_read_status,
> .write_status = omap_dm_timer_write_status,
> + .set_cap = omap_dm_timer_set_cap,
> + .get_cap_status = omap_dm_timer_get_pwm_status,
> + .read_cap = omap_dm_timer_cap_counter,
> };
>
> static const struct dmtimer_platform_data omap3plus_pdata = {
> diff --git a/include/linux/platform_data/dmtimer-omap.h b/include/linux/platform_data/dmtimer-omap.h
> index 95d852aef130..726d89143842 100644
> --- a/include/linux/platform_data/dmtimer-omap.h
> +++ b/include/linux/platform_data/dmtimer-omap.h
> @@ -36,9 +36,13 @@ struct omap_dm_timer_ops {
> int (*set_pwm)(struct omap_dm_timer *timer, int def_on,
> int toggle, int trigger, int autoreload);
> int (*get_pwm_status)(struct omap_dm_timer *timer);
> + int (*set_cap)(struct omap_dm_timer *timer,
> + int autoreload, bool config_period);
> + int (*get_cap_status)(struct omap_dm_timer *timer);
> int (*set_prescaler)(struct omap_dm_timer *timer, int prescaler);
>
> unsigned int (*read_counter)(struct omap_dm_timer *timer);
> + unsigned int (*read_cap)(struct omap_dm_timer *timer, bool is_period);
> int (*write_counter)(struct omap_dm_timer *timer,
> unsigned int value);
> unsigned int (*read_status)(struct omap_dm_timer *timer);
Hi Andrew,
On 07/08/25 23:07, Andrew Davis wrote:
> On 8/7/25 7:32 AM, Gokul Praveen wrote:
>> Add PWM capture function in DM timer driver.
>>
>> OMAP DM timer hardware supports capture feature.It can be used to
>> timestamp events (falling/rising edges) detected on input signal.
>>
>> Signed-off-by: Gokul Praveen <g-praveen@ti.com>
>> ---
>> Precondition : Before calling driver API,it is assumed that the
>> capture signal is active else both duty cycle
>> and period returned by driver will not be valid.
>> ---
>> drivers/clocksource/timer-ti-dm.c | 127 ++++++++++++++++++++-
>> include/linux/platform_data/dmtimer-omap.h | 4 +
>> 2 files changed, 129 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/
>> timer-ti-dm.c
>> index e9e32df6b566..a4bf72c850b5 100644
>> --- a/drivers/clocksource/timer-ti-dm.c
>> +++ b/drivers/clocksource/timer-ti-dm.c
>> @@ -31,6 +31,7 @@
>> #include <linux/platform_data/dmtimer-omap.h>
>> #include <clocksource/timer-ti-dm.h>
>> +#include <linux/delay.h>
>> /*
>> * timer errata flags
>> @@ -836,6 +837,49 @@ static int omap_dm_timer_set_match(struct
>> omap_dm_timer *cookie, int enable,
>> return 0;
>> }
>> +static int omap_dm_timer_set_cap(struct omap_dm_timer *cookie,
>> + int autoreload, bool config_period)
>> +{
>> + struct dmtimer *timer;
>> + struct device *dev;
>> + int rc;
>> + u32 l;
>> +
>> + timer = to_dmtimer(cookie);
>> + if (unlikely(!timer))
>> + return -EINVAL;
>> +
>> + dev = &timer->pdev->dev;
>
> Do this assignment up where the var is declared
>
Actually the timer is initialized after that in the to_dmtimer function.
So wouldn't initializing the 'dev' variable before that cause issues.
>> + rc = pm_runtime_resume_and_get(dev);
>> +
>
> Extra newline, fix this everywhere
>
>> + if (rc)
>> + return rc;
>> + /*
>> + * 1. Select autoreload mode. TIMER_TCLR[1] AR bit.
>> + * 2. TIMER_TCLR[14]: Sets the functionality of the TIMER IO pin.
>> + * 3. TIMER_TCLR[13] : Capture mode select bit.
>> + * 3. TIMER_TCLR[9-8] : Select transition capture mode.
>> + */
>> +
>> + l = dmtimer_read(timer, OMAP_TIMER_CTRL_REG);
>> +
>> + if (autoreload)
>> + l |= OMAP_TIMER_CTRL_AR;
>> +
>> + l |= OMAP_TIMER_CTRL_CAPTMODE | OMAP_TIMER_CTRL_GPOCFG;
>> +
>> + if (config_period == true)
>> + l |= OMAP_TIMER_CTRL_TCM_LOWTOHIGH; /*Time Period config*/
>
> Add space around /* xxx */ in your comments, do this everywhere
>
Sure Andrew.
>> + else
>> + l |= OMAP_TIMER_CTRL_TCM_BOTHEDGES; /*Duty Cycle config*/
>> +
>> + dmtimer_write(timer, OMAP_TIMER_CTRL_REG, l);
>> +
>> + pm_runtime_put_sync(dev);
>> +
>> + return 0;
>> +}
>> +
>> static int omap_dm_timer_set_pwm(struct omap_dm_timer *cookie, int
>> def_on,
>> int toggle, int trigger, int autoreload)
>> {
>> @@ -1023,23 +1067,99 @@ static unsigned int
>> omap_dm_timer_read_counter(struct omap_dm_timer *cookie)
>> return __omap_dm_timer_read_counter(timer);
>> }
>> +static inline unsigned int __omap_dm_timer_cap(struct dmtimer *timer,
>> int idx)
>> +{
>> + return idx == 0 ? dmtimer_read(timer, OMAP_TIMER_CAPTURE_REG) :
>> + dmtimer_read(timer, OMAP_TIMER_CAPTURE2_REG);
>> +}
>> +
>> static int omap_dm_timer_write_counter(struct omap_dm_timer *cookie,
>> unsigned int value)
>> {
>> struct dmtimer *timer;
>> + struct device *dev;
>> timer = to_dmtimer(cookie);
>> - if (unlikely(!timer || !atomic_read(&timer->enabled))) {
>> - pr_err("%s: timer not available or enabled.\n", __func__);
>> + if (unlikely(!timer)) {
>> + pr_err("%s: timer not available.\n", __func__);
>> return -EINVAL;
>> }
>> + dev = &timer->pdev->dev;
>> +
>> + pm_runtime_resume_and_get(dev);
>> dmtimer_write(timer, OMAP_TIMER_COUNTER_REG, value);
>> + pm_runtime_put_sync(dev);
>> /* Save the context */
>> timer->context.tcrr = value;
>> return 0;
>> }
>> +/**
>> + * omap_dm_timer_cap_counter() - Calculate the high count or period
>> count depending on the
>> + * configuration.
>> + * @cookie:Pointer to OMAP DM timer
>> + * @is_period:Whether to configure timer in period or duty cycle mode
>> + *
>> + * Return high count or period count if timer is enabled else
>> appropriate error.
>> + */
>> +static unsigned int omap_dm_timer_cap_counter(struct omap_dm_timer
>> *cookie, bool is_period)
>> +{
>> + struct dmtimer *timer;
>> + unsigned int cap1 = 0;
>> + unsigned int cap2 = 0;
>> + u32 l, ret;
>> +
>> + timer = to_dmtimer(cookie);
>> + if (unlikely(!timer || !atomic_read(&timer->enabled))) {
>> + pr_err("%s:timer is not available or enabled.%p\n", __func__,
>> (void *)timer);
>> + return -EINVAL;
>> + }
>> +
>> + /*Stop the timer*/
>> + omap_dm_timer_stop(cookie);
>> +
>> + /* Clear the timer counter value to 0 */
>> + ret = omap_dm_timer_write_counter(cookie, 0);
>> +
>> + if (ret)
>> + return ret;
>> +
>> + /*Sets the timer capture configuration for duty cycle calculation*/
>> + if (is_period == false)
>> + ret = omap_dm_timer_set_cap(cookie, true, false);
>> +
>> + /*Sets the timer capture configuration for period calculation*/
>> + else
>> + ret = omap_dm_timer_set_cap(cookie, true, true);
>> +
>
> The above 8 lines could just be:
>
> ret = omap_dm_timer_set_cap(cookie, true, is_period);
>
> Andrew
>
Sure Andrew.
Regards
Gokul
>> + if (ret) {
>> + pr_err("%s: Failed to set timer capture configuration.\n",
>> __func__);
>> + return ret;
>> + }
>> + /*Start the timer*/
>> + omap_dm_timer_start(cookie);
>> +
>> + /*
>> + * 1 sec delay is given so as to provide
>> + * enough time to capture low frequency signals.
>> + */
>> + msleep(1000);
>> +
>> + cap1 = __omap_dm_timer_cap(timer, 0);
>> + cap2 = __omap_dm_timer_cap(timer, 1);
>> +
>> + /*
>> + * Clears the TCLR configuration.
>> + * The start bit must be set to 1 as the timer is already in
>> start mode.
>> + */
>> + l = dmtimer_read(timer, OMAP_TIMER_CTRL_REG);
>> + l &= ~(0xffff) | 0x1;
>> + dmtimer_write(timer, OMAP_TIMER_CTRL_REG, l);
>> +
>> + return (cap2-cap1);
>> +}
>> +
>> static int __maybe_unused omap_dm_timer_runtime_suspend(struct
>> device *dev)
>> {
>> struct dmtimer *timer = dev_get_drvdata(dev);
>> @@ -1246,6 +1366,9 @@ static const struct omap_dm_timer_ops
>> dmtimer_ops = {
>> .write_counter = omap_dm_timer_write_counter,
>> .read_status = omap_dm_timer_read_status,
>> .write_status = omap_dm_timer_write_status,
>> + .set_cap = omap_dm_timer_set_cap,
>> + .get_cap_status = omap_dm_timer_get_pwm_status,
>> + .read_cap = omap_dm_timer_cap_counter,
>> };
>> static const struct dmtimer_platform_data omap3plus_pdata = {
>> diff --git a/include/linux/platform_data/dmtimer-omap.h b/include/
>> linux/platform_data/dmtimer-omap.h
>> index 95d852aef130..726d89143842 100644
>> --- a/include/linux/platform_data/dmtimer-omap.h
>> +++ b/include/linux/platform_data/dmtimer-omap.h
>> @@ -36,9 +36,13 @@ struct omap_dm_timer_ops {
>> int (*set_pwm)(struct omap_dm_timer *timer, int def_on,
>> int toggle, int trigger, int autoreload);
>> int (*get_pwm_status)(struct omap_dm_timer *timer);
>> + int (*set_cap)(struct omap_dm_timer *timer,
>> + int autoreload, bool config_period);
>> + int (*get_cap_status)(struct omap_dm_timer *timer);
>> int (*set_prescaler)(struct omap_dm_timer *timer, int
>> prescaler);
>> unsigned int (*read_counter)(struct omap_dm_timer *timer);
>> + unsigned int (*read_cap)(struct omap_dm_timer *timer, bool
>> is_period);
>> int (*write_counter)(struct omap_dm_timer *timer,
>> unsigned int value);
>> unsigned int (*read_status)(struct omap_dm_timer *timer);
>
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