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counter:ti-eqep: remove floor

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commit 49a9565a7a7ce168e3e6482fb24e62d12f72ab81 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>
This commit is contained in:
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,