reset: sti: Provide ops .status() call-back

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/reset/sti/reset-syscfg.c b/drivers/reset/sti/reset-syscfg.c
index a145cc066d4a..a78e09c7825e 100644
--- a/drivers/reset/sti/reset-syscfg.c
+++ b/drivers/reset/sti/reset-syscfg.c
@@ -110,10 +110,33 @@ static int syscfg_reset_dev(struct reset_controller_dev *rcdev,
         return syscfg_reset_deassert(rcdev, idx);
 }
 
+static int syscfg_reset_status(struct reset_controller_dev *rcdev,
+                               unsigned long idx)
+{
+        struct syscfg_reset_controller *rst = to_syscfg_reset_controller(rcdev);
+        const struct syscfg_reset_channel *ch;
+        u32 ret_val = 0;
+        int err;
+
+        if (idx >= rcdev->nr_resets)
+                return -EINVAL;
+
+        ch = &rst->channels[idx];
+        if (ch->ack)
+                err = regmap_field_read(ch->ack, &ret_val);
+        else
+                err = regmap_field_read(ch->reset, &ret_val);
+        if (err)
+                return err;
+
+        return rst->active_low ? !ret_val : !!ret_val;
+}
+
 static struct reset_control_ops syscfg_reset_ops = {
         .reset    = syscfg_reset_dev,
         .assert   = syscfg_reset_assert,
         .deassert = syscfg_reset_deassert,
+        .status   = syscfg_reset_status,
 };
 
 static int syscfg_reset_controller_register(struct device *dev,