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counter:ti-eqep: remove floor 

commit 49a9565a7a upstream.

The hardware doesn't support this. QPOSINIT is an initialization value
that is triggered by other things. When the counter overflows, it
always wraps around to zero.

Fixes: f213729f67 "counter: new TI eQEP driver"
Signed-off-by: David Lechner <david@lechnology.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Link: https://lore.kernel.org/r/20201214000927.1793062-1-david@lechnology.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/237/head^2
David Lechner 2020-12-13 18:09:27 -06:00 committed by Greg Kroah-Hartman
parent 855b115749
commit 1bac5333d4
1 changed files with 0 additions and 35 deletions
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35
drivers/counter/ti-eqep.c
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@ -235,36 +235,6 @@ static ssize_t ti_eqep_position_ceiling_write(struct counter_device *counter,
return len;
}
static ssize_t ti_eqep_position_floor_read(struct counter_device *counter,
struct counter_count *count,
void *ext_priv, char *buf)
{
struct ti_eqep_cnt *priv = counter->priv;
u32 qposinit;
regmap_read(priv->regmap32, QPOSINIT, &qposinit);
return sprintf(buf, "%u\n", qposinit);
}
static ssize_t ti_eqep_position_floor_write(struct counter_device *counter,
struct counter_count *count,
void *ext_priv, const char *buf,
size_t len)
{
struct ti_eqep_cnt *priv = counter->priv;
int err;
u32 res;
err = kstrtouint(buf, 0, &res);
if (err < 0)
return err;
regmap_write(priv->regmap32, QPOSINIT, res);
return len;
}
static ssize_t ti_eqep_position_enable_read(struct counter_device *counter,
struct counter_count *count,
void *ext_priv, char *buf)
@ -301,11 +271,6 @@ static struct counter_count_ext ti_eqep_position_ext[] = {
.read = ti_eqep_position_ceiling_read,
.write = ti_eqep_position_ceiling_write,
},
{
.name = "floor",
.read = ti_eqep_position_floor_read,
.write = ti_eqep_position_floor_write,
},
{
.name = "enable",
.read = ti_eqep_position_enable_read,