counter:ti-eqep: remove floor

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: f213729f6796 "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>

diff --git a/drivers/counter/ti-eqep.c b/drivers/counter/ti-eqep.c
index a60aee1..65df9ef 100644 (file)
--- a/drivers/counter/ti-eqep.c
+++ b/drivers/counter/ti-eqep.c
@@ -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)
@@ -302,11 +272,6 @@ static struct counter_count_ext ti_eqep_position_ext[] = {
                .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,
                .write  = ti_eqep_position_enable_write,