linux-kernel - [PATCH 2/2] clk: sunxi-ng: sun55i-a523-r-ccu: Add missing PPU0 reset

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Message-Id: <20250619171025.3359384-3-wens@kernel.org>
Date: Fri, 20 Jun 2025 01:10:25 +0800
From: Chen-Yu Tsai <wens@...nel.org>
To: Stephen Boyd <sboyd@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej@...nel.org>,
	Samuel Holland <samuel@...lland.org>
Cc: Andre Przywara <andre.przywara@....com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	devicetree@...r.kernel.org,
	linux-sunxi@...ts.linux.dev,
	linux-clk@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] clk: sunxi-ng: sun55i-a523-r-ccu: Add missing PPU0 reset

From: Chen-Yu Tsai <wens@...e.org>

There is a PPU0 reset control bit in the same register as the PPU1
reset control. This missing reset control is for the PCK-600 unit
in the SoC. Manual tests show that the reset control indeed exists,
and if not configured, the system will hang when the PCK-600 registers
are accessed.

Add a reset entry for it at the end of the existing ones.

Fixes: 8cea339cfb81 ("clk: sunxi-ng: add support for the A523/T527 PRCM CCU")
Signed-off-by: Chen-Yu Tsai <wens@...e.org>
---
 drivers/clk/sunxi-ng/ccu-sun55i-a523-r.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/sunxi-ng/ccu-sun55i-a523-r.c b/drivers/clk/sunxi-ng/ccu-sun55i-a523-r.c
index b5464d8083c8..70ce0ca0cb7d 100644
--- a/drivers/clk/sunxi-ng/ccu-sun55i-a523-r.c
+++ b/drivers/clk/sunxi-ng/ccu-sun55i-a523-r.c
@@ -204,6 +204,7 @@ static struct ccu_reset_map sun55i_a523_r_ccu_resets[] = {
 	[RST_BUS_R_IR_RX]	= { 0x1cc, BIT(16) },
 	[RST_BUS_R_RTC]		= { 0x20c, BIT(16) },
 	[RST_BUS_R_CPUCFG]	= { 0x22c, BIT(16) },
+	[RST_BUS_R_PPU0]	= { 0x1ac, BIT(16) },
 };
 
 static const struct sunxi_ccu_desc sun55i_a523_r_ccu_desc = {
-- 
2.39.5