linux-kernel - [PATCH 06/11] clk: sunxi-ng: sun55i-a523-ccu: Lower audio0 pll minimum rate

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Message-ID: <20251020171059.2786070-7-wens@kernel.org>
Date: Tue, 21 Oct 2025 01:10:52 +0800
From: Chen-Yu Tsai <wens@...nel.org>
To: Chen-Yu Tsai <wens@...nel.org>,
	Jernej Skrabec <jernej@...nel.org>,
	Samuel Holland <samuel@...lland.org>,
	Mark Brown <broonie@...nel.org>,
	Stephen Boyd <sboyd@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Vinod Koul <vkoul@...nel.org>
Cc: linux-sunxi@...ts.linux.dev,
	linux-sound@...r.kernel.org,
	linux-clk@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org,
	dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 06/11] clk: sunxi-ng: sun55i-a523-ccu: Lower audio0 pll minimum rate

While the user manual states that the PLL's rate should be between 180
MHz and 3 GHz in the register defninition section, it also says the
actual operating frequency is 22.5792*4 MHz in the PLL features table.

22.5792*4 MHz is one of the actual clock rates that we want and is
is available in the SDM table. Lower the minimum clock rate to 90 MHz
so that both rates in the SDM table can be used.

Fixes: 7cae1e2b5544 ("clk: sunxi-ng: Add support for the A523/T527 CCU PLLs")
Signed-off-by: Chen-Yu Tsai <wens@...nel.org>
---
 drivers/clk/sunxi-ng/ccu-sun55i-a523.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/sunxi-ng/ccu-sun55i-a523.c b/drivers/clk/sunxi-ng/ccu-sun55i-a523.c
index acb532f8361b..20dad06b37ca 100644
--- a/drivers/clk/sunxi-ng/ccu-sun55i-a523.c
+++ b/drivers/clk/sunxi-ng/ccu-sun55i-a523.c
@@ -300,7 +300,7 @@ static struct ccu_nm pll_audio0_4x_clk = {
 	.m		= _SUNXI_CCU_DIV(16, 6),
 	.sdm		= _SUNXI_CCU_SDM(pll_audio0_sdm_table, BIT(24),
 					 0x178, BIT(31)),
-	.min_rate	= 180000000U,
+	.min_rate	= 90000000U,
 	.max_rate	= 3000000000U,
 	.common		= {
 		.reg		= 0x078,
-- 
2.47.3