Revert "mfd: syscon: Remove repetition of the regmap_get_val_endian()"

This reverts commit 72a9585. It broke reboots on big-endian MIPS and MIPS64 malta QEMU instances, which use the syscon driver. Little-endian is not effected, which means likely it's important to handle regmap_get_val_endian() in this function after all. Fixes: 72a9585 ("mfd: syscon: Remove repetition of the regmap_get_val_endian()") Reviewed-by: Andy Shevchenko <[email protected]> Cc: Lee Jones <[email protected]> Signed-off-by: Jason A. Donenfeld <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
chewitt · Oct 23, 2022 · ca4582c · ca4582c
1 parent 52826d3
commit ca4582c
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
@@ -66,6 +66,14 @@ static struct syscon *of_syscon_register(struct device_node *np, bool check_clk)
 		goto err_map;
 	}
 
+	/* Parse the device's DT node for an endianness specification */
+	if (of_property_read_bool(np, "big-endian"))
+		syscon_config.val_format_endian = REGMAP_ENDIAN_BIG;
+	else if (of_property_read_bool(np, "little-endian"))
+		syscon_config.val_format_endian = REGMAP_ENDIAN_LITTLE;
+	else if (of_property_read_bool(np, "native-endian"))
+		syscon_config.val_format_endian = REGMAP_ENDIAN_NATIVE;
+
 	/*
 	 * search for reg-io-width property in DT. If it is not provided,
 	 * default to 4 bytes. regmap_init_mmio will return an error if values