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From:   Tudor Ambarus <tudor.ambarus@linaro.org>
To:     peter.griffin@linaro.org, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, mturquette@baylibre.com,
        sboyd@kernel.org, conor+dt@kernel.org, andi.shyti@kernel.org,
        alim.akhtar@samsung.com, gregkh@linuxfoundation.org,
        jirislaby@kernel.org, catalin.marinas@arm.com, will@kernel.org,
        s.nawrocki@samsung.com, tomasz.figa@gmail.com,
        cw00.choi@samsung.com, arnd@arndb.de, semen.protsenko@linaro.org
Cc:     andre.draszik@linaro.org, saravanak@google.com,
        willmcvicker@google.com, linux-arm-kernel@lists.infradead.org,
        linux-samsung-soc@vger.kernel.org, linux-clk@vger.kernel.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-i2c@vger.kernel.org, linux-serial@vger.kernel.org,
        Tudor Ambarus <tudor.ambarus@linaro.org>
Subject: [PATCH 07/13] clk: samsung: gs101: mark PERIC0 IP TOP gate clock as critical
Date:   Thu, 14 Dec 2023 10:52:37 +0000
Message-ID: <20231214105243.3707730-8-tudor.ambarus@linaro.org>
In-Reply-To: <20231214105243.3707730-1-tudor.ambarus@linaro.org>
References: <20231214105243.3707730-1-tudor.ambarus@linaro.org>
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Testing USI8 I2C with an eeprom revealed that when the USI8 leaf clock
is disabled it leads to the CMU_TOP PERIC0 IP gate clock disablement,
which then makes the system hang. To prevent this, mark
CLK_GOUT_CMU_PERIC0_IP as critical. Other clocks will be marked
accordingly when tested.

Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
---
 drivers/clk/samsung/clk-gs101.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/samsung/clk-gs101.c b/drivers/clk/samsung/clk-gs101.c
index 3d194520b05e..08d80fca9cd6 100644
--- a/drivers/clk/samsung/clk-gs101.c
+++ b/drivers/clk/samsung/clk-gs101.c
@@ -1402,7 +1402,7 @@ static const struct samsung_gate_clock cmu_top_gate_clks[] __initconst = {
 	     "mout_cmu_peric0_bus", CLK_CON_GAT_GATE_CLKCMU_PERIC0_BUS,
 	     21, 0, 0),
 	GATE(CLK_GOUT_CMU_PERIC0_IP, "gout_cmu_peric0_ip", "mout_cmu_peric0_ip",
-	     CLK_CON_GAT_GATE_CLKCMU_PERIC0_IP, 21, 0, 0),
+	     CLK_CON_GAT_GATE_CLKCMU_PERIC0_IP, 21, CLK_IS_CRITICAL, 0),
 	GATE(CLK_GOUT_CMU_PERIC1_BUS, "gout_cmu_peric1_bus",
 	     "mout_cmu_peric1_bus", CLK_CON_GAT_GATE_CLKCMU_PERIC1_BUS,
 	     21, 0, 0),
-- 
2.43.0.472.g3155946c3a-goog