[PATCH v2] configs: starfive: enable mtdparts on visionfive2

[E Shattow <e@freeshell.de>]

add default mtdparts and mtdids consistent with Linux v7.3 Cadence QSPI
driver .get_name() handler cqspi_get_name() and jh7110-common.dtsi

Signed-off-by: E Shattow <e@freeshell.de>

---

This allows us to update the documentation to be slightly less likely
that the user would type the wrong offset by using mtd part names:

-    loady && sf update $loadaddr 0 $filesize
-        StarFive # loady && sf update $loadaddr 0 $filesize
+    loady && sf update $loadaddr spl
+        StarFive # loady && sf update $loadaddr spl

However that documentation update is planned for after the mtdparts
addition lands in release. It would be preferable to derive mtdparts
layout at runtime from device tree; if there is some way to do that
sensibly please offer some advice how to do so in the review. Thanks!

Refer to discussion of mtd-id for SpacemiT K3 [1] and Linux v7.3 Cadence QSPI
driver [2].

1: https://lore.kernel.org/u-boot/20261022103907.1415045-3-e@freeshell.de/

2: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/spi/spi-cadence-quadspi.c?h=v7.3#n1724

static const char *cqspi_get_name(struct spi_mem *mem)
{
        struct cqspi_st *cqspi = spi_controller_get_devdata(mem->spi->controller);
        struct device *dev = &cqspi->pdev->dev;

        return devm_kasprintf(dev, GFP_KERNEL, "%s.%d", dev_name(dev),
                              spi_get_chipselect(mem->spi, 0));
}

In the typical situation for JH-7110 SoC then dev_name(dev) is "13010000.spi"
and spi_get_chipselect(mem->spi, 0) returns a value of zero.

Changes in v2:
- use Linux v7.3 cqspi_get_name() typical result for mtdparts layout
  name; this is done for compatibility in the non-default configuration
  of matching cmdline mtdparts mtd-id when Linux MTD_OF_PARTS is disabled
---
 configs/starfive_visionfive2_defconfig | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configs/starfive_visionfive2_defconfig b/configs/starfive_visionfive2_defconfig
index 45de1c1cb671..e2a1f10dbc0a 100644
--- a/configs/starfive_visionfive2_defconfig
+++ b/configs/starfive_visionfive2_defconfig
@@ -78,6 +78,9 @@ CONFIG_CMD_WDT=y
 CONFIG_CMD_WGET=y
 CONFIG_WGET_HTTPS=y
 CONFIG_CMD_BOOTSTAGE=y
+CONFIG_CMD_MTDPARTS=y
+CONFIG_MTDIDS_DEFAULT="nor0=13010000.spi.0"
+CONFIG_MTDPARTS_DEFAULT="13010000.spi.0:960k(spl),64k(uboot-env),-(uboot)"
 CONFIG_OF_BOARD=y
 CONFIG_DEVICE_TREE_INCLUDES="starfive-visionfive2-u-boot.dtsi"
 CONFIG_OF_LIST="starfive/jh7110-deepcomputing-fml13v01 starfive/jh7110-milkv-mars starfive/jh7110-milkv-marscm-emmc starfive/jh7110-milkv-marscm-lite starfive/jh7110-orangepi-rv starfive/jh7110-pine64-star64 starfive/jh7110-starfive-visionfive-2-v1.2a starfive/jh7110-starfive-visionfive-2-v1.3b starfive/jh7110-starfive-visionfive-2-lite starfive/jh7110-starfive-visionfive-2-lite-emmc"
@@ -107,6 +110,7 @@ CONFIG_SPI_FLASH_EON=y
 CONFIG_SPI_FLASH_GIGADEVICE=y
 CONFIG_SPI_FLASH_ISSI=y
 CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_MTD=y
 CONFIG_DM_MDIO=y
 CONFIG_DM_ETH_PHY=y
 CONFIG_DWC_ETH_QOS=y

base-commit: 903c9578eeb36d72f087082da494c605ddaed3b2
-- 
2.53.0