Merge patch series "nand: Add sandbox tests"

To quote the author:

This series tests raw nand flash in sandbox and fixes various bugs discovered in
the process. I've tried to do things in a contemporary manner, avoiding the
(numerous) variations present on only a few boards. The test is pretty minimal.
Future work could test the rest of the nand API as well as the MTD API.

Bloat (for v1) at [1] (for boards with SPL_NAND_SUPPORT enabled). Almost
everything grows by a few bytes due to nand_page_size. A few boards grow more,
mostly those using nand_spl_loaders.c. CI at [2].

[1] https://gist.github.com/Forty-Bot/9694f3401893c9e706ccc374922de6c2
[2] https://source.denx.de/u-boot/custodians/u-boot-clk/-/pipelines/18443

3 files changed, 83 insertions, 0 deletions

diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 85d0d6a1703..8847c4cd0a8 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -282,6 +282,23 @@ int os_persistent_file(char *buf, int maxsize, const char *fname)
 	return 0;
 }
 
+int os_mktemp(char *fname, off_t size)
+{
+	int fd;
+
+	fd = mkostemp(fname, O_CLOEXEC);
+	if (fd < 0)
+		return -errno;
+
+	if (unlink(fname) < 0)
+		return -errno;
+
+	if (ftruncate(fd, size))
+		return -errno;
+
+	return fd;
+}
+
 /* Restore tty state when we exit */
 static struct termios orig_term;
 static bool term_setup;
diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index 2887f6c0e71..6fd62fcdf8d 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -1913,6 +1913,71 @@
 				compatible = "sandbox,arm-ffa";
 		};
 	};
+
+	nand-controller {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "sandbox,nand";
+
+		nand@0 {
+			reg = <0>;
+			nand-ecc-mode = "soft";
+			sandbox,id = [00 e3];
+			sandbox,erasesize = <(8 * 1024)>;
+			sandbox,oobsize = <16>;
+			sandbox,pagesize = <512>;
+			sandbox,pages = <0x2000>;
+			sandbox,err-count = <1>;
+			sandbox,err-step-size = <512>;
+		};
+
+		/* MT29F64G08AKABA */
+		nand@1 {
+			reg = <1>;
+			nand-ecc-mode = "soft_bch";
+			sandbox,id = [2C 48 00 26 89 00 00 00];
+			sandbox,onfi = [
+				4f 4e 46 49 0e 00 5a 00
+				ff 01 00 00 00 00 03 00
+				00 00 00 00 00 00 00 00
+				00 00 00 00 00 00 00 00
+				4d 49 43 52 4f 4e 20 20
+				20 20 20 20 4d 54 32 39
+				46 36 34 47 30 38 41 4b
+				41 42 41 43 35 20 20 20
+				2c 00 00 00 00 00 00 00
+				00 00 00 00 00 00 00 00
+				00 10 00 00 e0 00 00 02
+				00 00 1c 00 80 00 00 00
+				00 10 00 00 02 23 01 50
+				00 01 05 01 00 00 04 00
+				04 01 1e 00 00 00 00 00
+				00 00 00 00 00 00 00 00
+				0e 1f 00 1f 00 f4 01 ac
+				0d 19 00 c8 00 00 00 00
+				00 00 00 00 00 00 0a 07
+				19 00 00 00 00 00 00 00
+				00 00 00 00 01 00 01 00
+				00 00 04 10 01 81 04 02
+				02 01 1e 90 00 00 00 00
+				00 00 00 00 00 00 00 00
+				00 00 00 00 00 00 00 00
+				00 00 00 00 00 00 00 00
+				00 00 00 00 00 00 00 00
+				00 00 00 00 00 00 00 00
+				00 00 00 00 00 00 00 00
+				00 00 00 00 00 00 00 00
+				00 00 00 00 00 00 00 00
+				00 00 00 00 00 03 20 7d
+			];
+			sandbox,erasesize = <(512 * 1024)>;
+			sandbox,oobsize = <224>;
+			sandbox,pagesize = <4096>;
+			sandbox,pages = <0x200000>;
+			sandbox,err-count = <3>;
+			sandbox,err-step-size = <512>;
+		};
+	};
 };
 
 #include "sandbox_pmic.dtsi"
diff --git a/arch/sandbox/include/asm/spl.h b/arch/sandbox/include/asm/spl.h
index f349ea19971..4fab24cd156 100644
--- a/arch/sandbox/include/asm/spl.h
+++ b/arch/sandbox/include/asm/spl.h
@@ -15,6 +15,7 @@ enum {
 	BOOT_DEVICE_CPGMAC,
 	BOOT_DEVICE_NOR,
 	BOOT_DEVICE_SPI,
+	BOOT_DEVICE_NAND,
 };
 
 /**