linux-kernel - [PATCH 5.18 0545/1095] clk: renesas: rzg2l: Fix reset status function

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Message-Id: <20220815180452.097609847@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 19:59:04 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Biju Das <biju.das.jz@...renesas.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 0545/1095] clk: renesas: rzg2l: Fix reset status function

From: Biju Das <biju.das.jz@...renesas.com>

[ Upstream commit 02c96ed9e4cd1f47bfcd10296fec6b0b69d6b3c6 ]

As per RZ/G2L HW(Rev.1.10) manual, reset monitor register value 0 means
reset signal is not applied (deassert state) and 1 means reset signal
is applied (assert state).

reset_control_status() expects a positive value if the reset line is
asserted. But rzg2l_cpg_status function returns zero for asserted
state.

This patch fixes the issue by adding double inverted logic, so that
reset_control_status returns a positive value if the reset line is
asserted.

Fixes: ef3c613ccd68 ("clk: renesas: Add CPG core wrapper for RZ/G2L SoC")
Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
Link: https://lore.kernel.org/r/20220531071657.104121-1-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/clk/renesas/rzg2l-cpg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/renesas/rzg2l-cpg.c b/drivers/clk/renesas/rzg2l-cpg.c
index 486d0656c58a..1068058a3865 100644
--- a/drivers/clk/renesas/rzg2l-cpg.c
+++ b/drivers/clk/renesas/rzg2l-cpg.c
@@ -744,7 +744,7 @@ static int rzg2l_cpg_status(struct reset_controller_dev *rcdev,
 	unsigned int reg = info->resets[id].off;
 	u32 bitmask = BIT(info->resets[id].bit);
 
-	return !(readl(priv->base + CLK_MRST_R(reg)) & bitmask);
+	return !!(readl(priv->base + CLK_MRST_R(reg)) & bitmask);
 }
 
 static const struct reset_control_ops rzg2l_cpg_reset_ops = {
-- 
2.35.1