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[5/6] mtd: rawnand: gpio: Support standard nand width

Message ID 20231108-fix-mips-nand-v1-5-5fc5586d04de@linaro.org
State New
Headers show
Series Fix polarity and bindings for GPIO-based NAND drivers | expand

Commit Message

Linus Walleij Nov. 8, 2023, 2:33 p.m. UTC 
The standard property for describing the band width of a NAND
memory is "nand-bus-width" not "bank-width". The new bindings
support both so make Linux check both in priority order.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/mtd/nand/raw/gpio.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/mtd/nand/raw/gpio.c b/drivers/mtd/nand/raw/gpio.c
index 5553101c709c..d5bd245b0c0d 100644
--- a/drivers/mtd/nand/raw/gpio.c
+++ b/drivers/mtd/nand/raw/gpio.c
@@ -183,7 +183,15 @@  static int gpio_nand_get_config(struct device *dev,
 {
 	u32 val;
 
-	if (!device_property_read_u32(dev, "bank-width", &val)) {
+	/* The preferred binding takes precedence */
+	if (!device_property_read_u32(dev, "nand-bus-width", &val)) {
+		if (val == 16) {
+			chip->options |= NAND_BUSWIDTH_16;
+		} else if (val != 8) {
+			dev_err(dev, "invalid nand-bus-width %u\n", val);
+			return -EINVAL;
+		}
+	} else if (!device_property_read_u32(dev, "bank-width", &val)) {
 		if (val == 2) {
 			chip->options |= NAND_BUSWIDTH_16;
 		} else if (val != 1) {