linux-kernel - [PATCH] clk: en7523: Fix wrong BUS clock for EN7581

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Message-ID: <20241116105710.19748-1-ansuelsmth@gmail.com>
Date: Sat, 16 Nov 2024 11:56:53 +0100
From: Christian Marangi <ansuelsmth@...il.com>
To: Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Lorenzo Bianconi <lorenzo@...nel.org>,
	linux-clk@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	upstream@...oha.com
Cc: Christian Marangi <ansuelsmth@...il.com>,
	stable@...r.kernel.org
Subject: [PATCH] clk: en7523: Fix wrong BUS clock for EN7581

The Documentation for EN7581 had a typo and still referenced the EN7523
BUS base source frequency. This was in conflict with a different page in
the Documentration that state that the BUS runs at 300MHz (600MHz source
with divisor set to 2) and the actual watchdog that tick at half the BUS
clock (150MHz). This was verified with the watchdog by timing the
seconds that the system takes to reboot (due too watchdog) and by
operating on different values of the BUS divisor.

The correct values for source of BUS clock are 600MHz and 540MHz.

This was also confirmed by Airoha.

Cc: stable@...r.kernel.org
Fixes: 66bc47326ce2 ("clk: en7523: Add EN7581 support")
Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
---
 drivers/clk/clk-en7523.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/clk-en7523.c b/drivers/clk/clk-en7523.c
index e52c5460e927..239cb04d9ae3 100644
--- a/drivers/clk/clk-en7523.c
+++ b/drivers/clk/clk-en7523.c
@@ -87,6 +87,7 @@ static const u32 slic_base[] = { 100000000, 3125000 };
 static const u32 npu_base[] = { 333000000, 400000000, 500000000 };
 /* EN7581 */
 static const u32 emi7581_base[] = { 540000000, 480000000, 400000000, 300000000 };
+static const u32 bus7581_base[] = { 600000000, 540000000 };
 static const u32 npu7581_base[] = { 800000000, 750000000, 720000000, 600000000 };
 static const u32 crypto_base[] = { 540000000, 480000000 };
 
@@ -222,8 +223,8 @@ static const struct en_clk_desc en7581_base_clks[] = {
 		.base_reg = REG_BUS_CLK_DIV_SEL,
 		.base_bits = 1,
 		.base_shift = 8,
-		.base_values = bus_base,
-		.n_base_values = ARRAY_SIZE(bus_base),
+		.base_values = bus7581_base,
+		.n_base_values = ARRAY_SIZE(bus7581_base),
 
 		.div_bits = 3,
 		.div_shift = 0,
-- 
2.45.2