linux-kernel - [PATCH 2/3] mtd: spi-nor: support vcc-supply regulator

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Message-Id: <20240920-spi-v1-2-97f220c2e10c@nxp.com>
Date: Fri, 20 Sep 2024 16:54:07 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Pratyush Yadav <pratyush@...nel.org>, Michael Walle <mwalle@...nel.org>, 
 Miquel Raynal <miquel.raynal@...tlin.com>, 
 Richard Weinberger <richard@....at>, Vignesh Raghavendra <vigneshr@...com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>
Cc: linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, Peng Fan <peng.fan@....com>
Subject: [PATCH 2/3] mtd: spi-nor: support vcc-supply regulator

From: Peng Fan <peng.fan@....com>

spi nor flash needs power supply to work properly. The power supply
maybe software controllable per board design. So add the support
for an optional vcc-supply regulator.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/mtd/spi-nor/core.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 9d6e85bf227b..0449afe6bb20 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -17,6 +17,7 @@
 #include <linux/mtd/spi-nor.h>
 #include <linux/mutex.h>
 #include <linux/of_platform.h>
+#include <linux/regulator/consumer.h>
 #include <linux/sched/task_stack.h>
 #include <linux/sizes.h>
 #include <linux/slab.h>
@@ -3462,6 +3463,10 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
 	if (!nor->bouncebuf)
 		return -ENOMEM;
 
+	ret = devm_regulator_get_enable_optional(dev, "vcc");
+	if (ret)
+		return ret;
+
 	ret = spi_nor_hw_reset(nor);
 	if (ret)
 		return ret;

-- 
2.37.1