linux-kernel - [PATCH 1/6] nvmem: qfprom: Mark core clk as optional

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Message-Id: <20231020105545.216052-2-srinivas.kandagatla@linaro.org>
Date:   Fri, 20 Oct 2023 11:55:40 +0100
From:   srinivas.kandagatla@...aro.org
To:     gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org,
        Luca Weiss <luca.weiss@...rphone.com>,
        Douglas Anderson <dianders@...omium.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH 1/6] nvmem: qfprom: Mark core clk as optional

From: Luca Weiss <luca.weiss@...rphone.com>

On some platforms like sc7280 on non-ChromeOS devices the core clock
cannot be touched by Linux so we cannot provide it. Mark it as optional
as accessing qfprom for reading works without it but we still prohibit
writing if we cannot provide the clock.

Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
Reviewed-by: Douglas Anderson <dianders@...omium.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 drivers/nvmem/qfprom.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c
index 14814cba2dd6..525be03b7bba 100644
--- a/drivers/nvmem/qfprom.c
+++ b/drivers/nvmem/qfprom.c
@@ -423,12 +423,12 @@ static int qfprom_probe(struct platform_device *pdev)
 		if (IS_ERR(priv->vcc))
 			return PTR_ERR(priv->vcc);
 
-		priv->secclk = devm_clk_get(dev, "core");
+		priv->secclk = devm_clk_get_optional(dev, "core");
 		if (IS_ERR(priv->secclk))
 			return dev_err_probe(dev, PTR_ERR(priv->secclk), "Error getting clock\n");
 
-		/* Only enable writing if we have SoC data. */
-		if (priv->soc_data)
+		/* Only enable writing if we have SoC data and a valid clock */
+		if (priv->soc_data && priv->secclk)
 			econfig.reg_write = qfprom_reg_write;
 	}
 
-- 
2.25.1