From 6d88002e93d301cde96371edcd399e4574345849 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Tue, 7 Sep 2021 14:49:00 +0100
Subject: [PATCH] reset: reset-brcmstb-rescal: Support shared use

reset_control_reset should not be used with shared reset controllers.
Add support for reset_control_assert and _deassert to get the desired
behaviour and avoid ugly warnings in the kernel log.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
 drivers/reset/reset-brcmstb-rescal.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

--- a/drivers/reset/reset-brcmstb-rescal.c
+++ b/drivers/reset/reset-brcmstb-rescal.c
@@ -20,6 +20,7 @@ struct brcm_rescal_reset {
 	struct reset_controller_dev rcdev;
 };
 
+/* Also doubles a deassert */
 static int brcm_rescal_reset_set(struct reset_controller_dev *rcdev,
 				 unsigned long id)
 {
@@ -52,6 +53,13 @@ static int brcm_rescal_reset_set(struct
 	return 0;
 }
 
+/* A dummy function - deassert/reset does all the work */
+static int brcm_rescal_reset_assert(struct reset_controller_dev *rcdev,
+				    unsigned long id)
+{
+	return 0;
+}
+
 static int brcm_rescal_reset_xlate(struct reset_controller_dev *rcdev,
 				   const struct of_phandle_args *reset_spec)
 {
@@ -61,6 +69,8 @@ static int brcm_rescal_reset_xlate(struc
 
 static const struct reset_control_ops brcm_rescal_reset_ops = {
 	.reset = brcm_rescal_reset_set,
+	.deassert = brcm_rescal_reset_set,
+	.assert = brcm_rescal_reset_assert,
 };
 
 static int brcm_rescal_reset_probe(struct platform_device *pdev)
