reset: add socfpga_reset_status

Populate the reset_status callback for SOCFPGA.

Signed-off-by: Alan Tull <atull@opensource.altera.com>
Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/reset/reset-socfpga.c b/drivers/reset/reset-socfpga.c
index 79c32ca84ef1..40582089474a 100644
--- a/drivers/reset/reset-socfpga.c
+++ b/drivers/reset/reset-socfpga.c
@@ -76,9 +76,24 @@ static int socfpga_reset_deassert(struct reset_controller_dev *rcdev,
         return 0;
 }
 
+static int socfpga_reset_status(struct reset_controller_dev *rcdev,
+                                unsigned long id)
+{
+        struct socfpga_reset_data *data = container_of(rcdev,
+                                                struct socfpga_reset_data, rcdev);
+        int bank = id / BITS_PER_LONG;
+        int offset = id % BITS_PER_LONG;
+        u32 reg;
+
+        reg = readl(data->membase + OFFSET_MODRST + (bank * NR_BANKS));
+
+        return !(reg & BIT(offset));
+}
+
 static struct reset_control_ops socfpga_reset_ops = {
         .assert         = socfpga_reset_assert,
         .deassert       = socfpga_reset_deassert,
+        .status         = socfpga_reset_status,
 };
 
 static int socfpga_reset_probe(struct platform_device *pdev)