openwrt/target/linux/pistachio/patches-6.6/401-mtd-nor-support-mtd-name-from-device-tree.patch

From f32bc2aa01edcba2f2ed5db151cf183eac9ef919 Mon Sep 17 00:00:00 2001
From: Abhimanyu Vishwakarma <Abhimanyu.Vishwakarma@imgtec.com>
Date: Sat, 25 Feb 2017 16:42:50 +0000
Subject: mtd: nor: support mtd name from device tree

Signed-off-by: Abhimanyu Vishwakarma <Abhimanyu.Vishwakarma@imgtec.com>
---
 drivers/mtd/spi-nor/spi-nor.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

--- a/drivers/spi/spi-mem.c
+++ b/drivers/spi/spi-mem.c
@@ -846,7 +846,9 @@ static int spi_mem_probe(struct spi_devi
 {
 	struct spi_mem_driver *memdrv = to_spi_mem_drv(spi->dev.driver);
 	struct spi_controller *ctlr = spi->controller;
+	const char __maybe_unused *of_mtd_name = NULL;
 	struct spi_mem *mem;
+	int ret;
 
 	mem = devm_kzalloc(&spi->dev, sizeof(*mem), GFP_KERNEL);
 	if (!mem)
@@ -854,10 +856,15 @@ static int spi_mem_probe(struct spi_devi
 
 	mem->spi = spi;
 
-	if (ctlr->mem_ops && ctlr->mem_ops->get_name)
+	if (ctlr->mem_ops && ctlr->mem_ops->get_name) {
 		mem->name = ctlr->mem_ops->get_name(mem);
-	else
-		mem->name = dev_name(&spi->dev);
+	} else {
+		ret = device_property_read_string(&spi->dev, "linux,mtd-name", &of_mtd_name);
+		if (!ret)
+			mem->name = of_mtd_name;
+		else
+			mem->name = dev_name(&spi->dev);
+	}
 
 	if (IS_ERR_OR_NULL(mem->name))
 		return PTR_ERR_OR_ZERO(mem->name);
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -870,6 +870,17 @@ out_error:
  */
 static void mtd_set_dev_defaults(struct mtd_info *mtd)
 {
+#ifdef CONFIG_MTD_OF_PARTS
+	const char __maybe_unused *of_mtd_name = NULL;
+	struct device_node *np;
+
+	np = mtd_get_of_node(mtd);
+	if (np && !mtd->name) {
+		of_property_read_string(np, "linux,mtd-name", &of_mtd_name);
+		if (of_mtd_name)
+			mtd->name = of_mtd_name;
+	} else
+#endif
 	if (mtd->dev.parent) {
 		if (!mtd->owner && mtd->dev.parent->driver)
 			mtd->owner = mtd->dev.parent->driver->owner;