diff mbox series

[v3,3/8] mtd: rawnand: intel: Read the chip-select line from the correct OF node

Message ID 20220702231227.1579176-4-martin.blumenstingl@googlemail.com
State Accepted
Headers show
Series intel-nand-controller: Fixes, cleanups and questions | expand

Commit Message

Martin Blumenstingl July 2, 2022, 11:12 p.m. UTC 
The chip select has to be read from the flash node which is a child node
of the NAND controller.

Fixes: 0b1039f016e8a3 ("mtd: rawnand: Add NAND controller support on Intel LGM SoC")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 drivers/mtd/nand/raw/intel-nand-controller.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

Comments

Miquel Raynal Sept. 20, 2022, 8:16 a.m. UTC | #1 
On Sat, 2022-07-02 at 23:12:22 UTC, Martin Blumenstingl wrote:
> The chip select has to be read from the flash node which is a child node
> of the NAND controller.
> 
> Fixes: 0b1039f016e8a3 ("mtd: rawnand: Add NAND controller support on Intel LGM SoC")
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next, thanks.

Miquel
diff mbox series

Patch

diff --git a/drivers/mtd/nand/raw/intel-nand-controller.c b/drivers/mtd/nand/raw/intel-nand-controller.c
index e91b879b32bd..3df3f32423f9 100644
--- a/drivers/mtd/nand/raw/intel-nand-controller.c
+++ b/drivers/mtd/nand/raw/intel-nand-controller.c
@@ -16,6 +16,7 @@ 
 #include <linux/mtd/rawnand.h>
 #include <linux/mtd/nand.h>
 
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
@@ -580,6 +581,7 @@  static int ebu_nand_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct ebu_nand_controller *ebu_host;
+	struct device_node *chip_np;
 	struct nand_chip *nand;
 	struct mtd_info *mtd;
 	struct resource *res;
@@ -604,7 +606,12 @@  static int ebu_nand_probe(struct platform_device *pdev)
 	if (IS_ERR(ebu_host->hsnand))
 		return PTR_ERR(ebu_host->hsnand);
 
-	ret = device_property_read_u32(dev, "reg", &cs);
+	chip_np = of_get_next_child(dev->of_node, NULL);
+	if (!chip_np)
+		return dev_err_probe(dev, -EINVAL,
+				     "Could not find child node for the NAND chip\n");
+
+	ret = of_property_read_u32(chip_np, "reg", &cs);
 	if (ret) {
 		dev_err(dev, "failed to get chip select: %d\n", ret);
 		return ret;
@@ -660,7 +667,7 @@  static int ebu_nand_probe(struct platform_device *pdev)
 	writel(ebu_host->cs[cs].addr_sel | EBU_ADDR_MASK(5) | EBU_ADDR_SEL_REGEN,
 	       ebu_host->ebu + EBU_ADDR_SEL(cs));
 
-	nand_set_flash_node(&ebu_host->chip, dev->of_node);
+	nand_set_flash_node(&ebu_host->chip, chip_np);
 
 	mtd = nand_to_mtd(&ebu_host->chip);
 	if (!mtd->name) {