[PATCH] dfu: sf: rely on DT for spi speed and mode

[Neil Armstrong]

Align with cmd_sf, and try to rely on DT for spi speed and mode,
and still fallback on spi_flash_probe() if it fails.

With the current scheme, spi_flash_probe() will be called
with CONFIG_SF_DEFAULT_SPEED and CONFIG_SF_DEFAULT_MODE
with are set to 0 by default on DT platforms using DM_SPI_FLASH.

Like cmd_sf, keep the option to specify the speed and mode
from the dfu_alt_mode string, but rely on DT properties
if not specified.

Using CONFIG_SF_DEFAULT_SPEED and CONFIG_SF_DEFAULT_MODE
makes the SPIFC controller on Amlogic Meson G12B & SM1
hardware fail and is unable to recover until a system reboot.

Signed-off-by: Neil Armstrong <neil.armstrong at linaro.org>
---
 drivers/dfu/dfu_sf.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/dfu/dfu_sf.c b/drivers/dfu/dfu_sf.c
index 7c1c0f9e2dc..b5d875be5ea 100644
--- a/drivers/dfu/dfu_sf.c
+++ b/drivers/dfu/dfu_sf.c
@@ -123,6 +123,9 @@ static struct spi_flash *parse_dev(char *devstr)
 	unsigned int mode = CONFIG_SF_DEFAULT_MODE;
 	char *s, *endp;
 	struct spi_flash *dev;
+#if CONFIG_IS_ENABLED(DM_SPI_FLASH)
+	bool use_dt = true;
+#endif
 
 	s = strsep(&devstr, ":");
 	if (!s || !*s || (bus = simple_strtoul(s, &endp, 0), *endp)) {
@@ -143,6 +146,9 @@ static struct spi_flash *parse_dev(char *devstr)
 			printf("Invalid SPI speed %s\n", s);
 			return NULL;
 		}
+#if CONFIG_IS_ENABLED(DM_SPI_FLASH)
+		use_dt = false;
+#endif
 	}
 
 	s = strsep(&devstr, ":");
@@ -152,9 +158,25 @@ static struct spi_flash *parse_dev(char *devstr)
 			printf("Invalid SPI mode %s\n", s);
 			return NULL;
 		}
+#if CONFIG_IS_ENABLED(DM_SPI_FLASH)
+		use_dt = false;
+#endif
 	}
 
+#if CONFIG_IS_ENABLED(DM_SPI_FLASH)
+	if (use_dt) {
+		struct udevice *new;
+
+		if (!spi_flash_probe_bus_cs(bus, cs, &new))
+			dev = dev_get_uclass_priv(new);
+		else
+			dev = NULL;
+	} else {
+		dev = spi_flash_probe(bus, cs, speed, mode);
+	}
+#else
 	dev = spi_flash_probe(bus, cs, speed, mode);
+#endif
 	if (!dev) {
 		printf("Failed to create SPI flash at %u:%u:%u:%u\n",
 		       bus, cs, speed, mode);

---
base-commit: 19dbc09405d3503ce3efef3c2e4b4f0f1a03372d
change-id: 20240917-uboot-topic-dfu-sf-dt-8ae62e5c7d79

Best regards,
-- 
Neil Armstrong <neil.armstrong at linaro.org>