linux-kernel - [RESEND PATCH v4 2/2] mtd: spi-nor: support vcc-supply regulator

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Message-ID: <20241029102238.44673-2-tudor.ambarus@linaro.org>
Date: Tue, 29 Oct 2024 10:22:38 +0000
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: peng.fan@....nxp.com,
	m.felsch@...gutronix.de
Cc: pratyush@...nel.org,
	mwalle@...nel.org,
	miquel.raynal@...tlin.com,
	richard@....at,
	vigneshr@...com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com,
	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>,
	Tudor Ambarus <tudor.ambarus@...aro.org>
Subject: [RESEND PATCH v4 2/2] mtd: spi-nor: support vcc-supply regulator

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

SPI NOR flashes needs power supply to work properly. The power supply
maybe software controllable per board design. So add the support
for an vcc-supply regulator.

Signed-off-by: Peng Fan <peng.fan@....com>
Reviewed-by: Marco Felsch <m.felsch@...gutronix.de>
[ta: move devm_regulator_get_enable() to spi_nor_probe(). Add local dev
variable to avoid dereferences.]
Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
---
v4:
- move devm_regulator_get_enable() to spi_nor_probe().
- add local dev variable to avoid dereferences.

 drivers/mtd/spi-nor/core.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index b6f374ded390..29441f2bab5d 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>
@@ -3576,7 +3577,8 @@ static int spi_nor_create_write_dirmap(struct spi_nor *nor)
 static int spi_nor_probe(struct spi_mem *spimem)
 {
 	struct spi_device *spi = spimem->spi;
-	struct flash_platform_data *data = dev_get_platdata(&spi->dev);
+	struct device *dev = &spi->dev;
+	struct flash_platform_data *data = dev_get_platdata(dev);
 	struct spi_nor *nor;
 	/*
 	 * Enable all caps by default. The core will mask them after
@@ -3586,12 +3588,16 @@ static int spi_nor_probe(struct spi_mem *spimem)
 	char *flash_name;
 	int ret;
 
-	nor = devm_kzalloc(&spi->dev, sizeof(*nor), GFP_KERNEL);
+	ret = devm_regulator_get_enable(dev, "vcc");
+	if (ret)
+		return ret;
+
+	nor = devm_kzalloc(dev, sizeof(*nor), GFP_KERNEL);
 	if (!nor)
 		return -ENOMEM;
 
 	nor->spimem = spimem;
-	nor->dev = &spi->dev;
+	nor->dev = dev;
 	spi_nor_set_flash_node(nor, spi->dev.of_node);
 
 	spi_mem_set_drvdata(spimem, nor);
-- 
2.47.0.163.g1226f6d8fa-goog