linux-kernel - [PATCH 5.17 0728/1126] clk: renesas: r8a779f0: Fix RSW2 clock divider

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Message-Id: <20220405070428.960190253@linuxfoundation.org>
Date:   Tue,  5 Apr 2022 09:24:35 +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,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.17 0728/1126] clk: renesas: r8a779f0: Fix RSW2 clock divider

From: Geert Uytterhoeven <geert+renesas@...der.be>

[ Upstream commit 691419f90f7fb8a6f247b477cb539644e11431da ]

According to Section 8.1.2 Figure 8.1.1 ("Block Diagram of CPG"), Note
22 ("RSW2 divider"), and Table 8.1.4d ("Lists of CPG clocks generated
from CPGMA1"), the RSwitch2 and PCI Express clock is generated from PLL5
by dividing by two, followed by the RSW2 divider.  As PLL5 runs at 3200
MHz, and RSW2 is fixed to 320 MHz, the RSW2 divider must be 5.

Correct the parent and the fixed divider.

Fixes: 24aaff6a6ce4c4de ("clk: renesas: cpg-mssr: Add support for R-Car S4-8")
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
Link: https://lore.kernel.org/r/d6a406f31e6f02f892e0253f4e8a9a2f68fd652e.1641566003.git.geert+renesas@glider.be
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/clk/renesas/r8a779f0-cpg-mssr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/renesas/r8a779f0-cpg-mssr.c b/drivers/clk/renesas/r8a779f0-cpg-mssr.c
index e6ec02c2c2a8..344957d533d8 100644
--- a/drivers/clk/renesas/r8a779f0-cpg-mssr.c
+++ b/drivers/clk/renesas/r8a779f0-cpg-mssr.c
@@ -103,7 +103,7 @@ static const struct cpg_core_clk r8a779f0_core_clks[] __initconst = {
 	DEF_FIXED("s0d12_hsc",	R8A779F0_CLK_S0D12_HSC,	CLK_S0,		12, 1),
 	DEF_FIXED("cl16m_hsc",	R8A779F0_CLK_CL16M_HSC,	CLK_S0,		48, 1),
 	DEF_FIXED("s0d2_cc",	R8A779F0_CLK_S0D2_CC,	CLK_S0,		2, 1),
-	DEF_FIXED("rsw2",	R8A779F0_CLK_RSW2,	CLK_PLL5,	2, 1),
+	DEF_FIXED("rsw2",	R8A779F0_CLK_RSW2,	CLK_PLL5_DIV2,	5, 1),
 	DEF_FIXED("cbfusa",	R8A779F0_CLK_CBFUSA,	CLK_EXTAL,	2, 1),
 	DEF_FIXED("cpex",	R8A779F0_CLK_CPEX,	CLK_EXTAL,	2, 1),
 
-- 
2.34.1