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counter: 104-quad-8: Add Signal polarity component

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The 104-quad-8 driver provides support for Index signal polarity modes
via the "index_polarity" Signal component. This patch exposes the same
functionality through the more standard "polarity" Signal component.

Link: https://lore.kernel.org/r/01d00c21873159833035cb6775d0d0e8ad55f2ef.1664204990.git.william.gray@linaro.org/
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Link: https://lore.kernel.org/r/0bf840beee1665e9f04ea82368ecdde87c791a22.1664318353.git.william.gray@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
William Breathitt Gray 2022-09-27 18:53:39 -04:00 committed by Greg Kroah-Hartman
parent 650ae67bbf
commit 9830288aea
1 changed files with 35 additions and 0 deletions
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35
drivers/counter/104-quad-8.c
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@ -549,6 +549,32 @@ static int quad8_index_polarity_set(struct counter_device *counter,
return 0;
}
static int quad8_polarity_read(struct counter_device *counter,
struct counter_signal *signal,
enum counter_signal_polarity *polarity)
{
int err;
u32 index_polarity;
err = quad8_index_polarity_get(counter, signal, &index_polarity);
if (err)
return err;
*polarity = (index_polarity) ? COUNTER_SIGNAL_POLARITY_POSITIVE :
COUNTER_SIGNAL_POLARITY_NEGATIVE;
return 0;
}
static int quad8_polarity_write(struct counter_device *counter,
struct counter_signal *signal,
enum counter_signal_polarity polarity)
{
const u32 pol = (polarity == COUNTER_SIGNAL_POLARITY_POSITIVE) ? 1 : 0;
return quad8_index_polarity_set(counter, signal, pol);
}
static const char *const quad8_synchronous_modes[] = {
"non-synchronous",
"synchronous"
@ -977,6 +1003,13 @@ static struct counter_comp quad8_signal_ext[] = {
quad8_signal_fck_prescaler_write)
};
static const enum counter_signal_polarity quad8_polarities[] = {
COUNTER_SIGNAL_POLARITY_POSITIVE,
COUNTER_SIGNAL_POLARITY_NEGATIVE,
};
static DEFINE_COUNTER_AVAILABLE(quad8_polarity_available, quad8_polarities);
static DEFINE_COUNTER_ENUM(quad8_index_pol_enum, quad8_index_polarity_modes);
static DEFINE_COUNTER_ENUM(quad8_synch_mode_enum, quad8_synchronous_modes);
@ -984,6 +1017,8 @@ static struct counter_comp quad8_index_ext[] = {
COUNTER_COMP_SIGNAL_ENUM("index_polarity", quad8_index_polarity_get,
quad8_index_polarity_set,
quad8_index_pol_enum),
COUNTER_COMP_POLARITY(quad8_polarity_read, quad8_polarity_write,
quad8_polarity_available),
COUNTER_COMP_SIGNAL_ENUM("synchronous_mode", quad8_synchronous_mode_get,
quad8_synchronous_mode_set,
quad8_synch_mode_enum),