[PATCH v2] mtd: eject cfi_interleave code to its own header

[Adam Borowski <kilobyte@xxxxxxxxxx>]

This fixes build failures for stuff that doesn't care about that, such as:

In file included from ./include/linux/mtd/spi-nor.h:10,
                 from drivers/spi/spi-intel.c:13:
./include/linux/mtd/cfi.h:62:2: error: #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support
   62 | #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work.
      |  ^~~~~~~

Fixes: e23e5a05d1fd ("mtd: spi-nor: intel-spi: Convert to SPI MEM")
Signed-off-by: Adam Borowski <kilobyte@xxxxxxxxxx>
---
v2: Added a Fixes: tag.

 drivers/mtd/chips/cfi_cmdset_0001.c |  1 +
 drivers/mtd/chips/cfi_cmdset_0002.c |  1 +
 drivers/mtd/chips/cfi_cmdset_0020.c |  1 +
 drivers/mtd/chips/cfi_util.c        |  1 +
 drivers/mtd/chips/gen_probe.c       |  1 +
 drivers/mtd/chips/jedec_probe.c     |  1 +
 include/linux/mtd/cfi.h             | 75 --------------------------
 include/linux/mtd/cfi_interleave.h  | 83 +++++++++++++++++++++++++++++
 8 files changed, 89 insertions(+), 75 deletions(-)
 create mode 100644 include/linux/mtd/cfi_interleave.h

diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index 54f92d09d9cf..efbf06fce95b 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -34,6 +34,7 @@
 #include <linux/mtd/map.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/cfi.h>
+#include <linux/mtd/cfi_interleave.h>
 
 /* #define CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE */
 /* #define CMDSET0001_DISABLE_WRITE_SUSPEND */
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 67453f59c69c..70d00c3641d8 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -37,6 +37,7 @@
 #include <linux/mtd/map.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/cfi.h>
+#include <linux/mtd/cfi_interleave.h>
 #include <linux/mtd/xip.h>
 
 #define AMD_BOOTLOC_BUG
diff --git a/drivers/mtd/chips/cfi_cmdset_0020.c b/drivers/mtd/chips/cfi_cmdset_0020.c
index d35df526e0a6..007e37faff56 100644
--- a/drivers/mtd/chips/cfi_cmdset_0020.c
+++ b/drivers/mtd/chips/cfi_cmdset_0020.c
@@ -31,6 +31,7 @@
 #include <linux/interrupt.h>
 #include <linux/mtd/map.h>
 #include <linux/mtd/cfi.h>
+#include <linux/mtd/cfi_interleave.h>
 #include <linux/mtd/mtd.h>
 
 
diff --git a/drivers/mtd/chips/cfi_util.c b/drivers/mtd/chips/cfi_util.c
index 6a6a2a21d2ed..608315032f9e 100644
--- a/drivers/mtd/chips/cfi_util.c
+++ b/drivers/mtd/chips/cfi_util.c
@@ -22,6 +22,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/map.h>
 #include <linux/mtd/cfi.h>
+#include <linux/mtd/cfi_interleave.h>
 
 void cfi_udelay(int us)
 {
diff --git a/drivers/mtd/chips/gen_probe.c b/drivers/mtd/chips/gen_probe.c
index 4d4f97841016..8703890ff20e 100644
--- a/drivers/mtd/chips/gen_probe.c
+++ b/drivers/mtd/chips/gen_probe.c
@@ -10,6 +10,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/map.h>
 #include <linux/mtd/cfi.h>
+#include <linux/mtd/cfi_interleave.h>
 #include <linux/mtd/gen_probe.h>
 
 static struct mtd_info *check_cmd_set(struct map_info *, int);
diff --git a/drivers/mtd/chips/jedec_probe.c b/drivers/mtd/chips/jedec_probe.c
index 6f7e7e1b3fe5..88a979bb59bb 100644
--- a/drivers/mtd/chips/jedec_probe.c
+++ b/drivers/mtd/chips/jedec_probe.c
@@ -20,6 +20,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/map.h>
 #include <linux/mtd/cfi.h>
+#include <linux/mtd/cfi_interleave.h>
 #include <linux/mtd/gen_probe.h>
 
 /* AMD */
diff --git a/include/linux/mtd/cfi.h b/include/linux/mtd/cfi.h
index d88bb56c18e2..4a8ddb51afee 100644
--- a/include/linux/mtd/cfi.h
+++ b/include/linux/mtd/cfi.h
@@ -8,87 +8,12 @@
 
 #include <linux/delay.h>
 #include <linux/types.h>
-#include <linux/bug.h>
 #include <linux/interrupt.h>
 #include <linux/mtd/flashchip.h>
 #include <linux/mtd/map.h>
 #include <linux/mtd/cfi_endian.h>
 #include <linux/mtd/xip.h>
 
-#ifdef CONFIG_MTD_CFI_I1
-#define cfi_interleave(cfi) 1
-#define cfi_interleave_is_1(cfi) (cfi_interleave(cfi) == 1)
-#else
-#define cfi_interleave_is_1(cfi) (0)
-#endif
-
-#ifdef CONFIG_MTD_CFI_I2
-# ifdef cfi_interleave
-#  undef cfi_interleave
-#  define cfi_interleave(cfi) ((cfi)->interleave)
-# else
-#  define cfi_interleave(cfi) 2
-# endif
-#define cfi_interleave_is_2(cfi) (cfi_interleave(cfi) == 2)
-#else
-#define cfi_interleave_is_2(cfi) (0)
-#endif
-
-#ifdef CONFIG_MTD_CFI_I4
-# ifdef cfi_interleave
-#  undef cfi_interleave
-#  define cfi_interleave(cfi) ((cfi)->interleave)
-# else
-#  define cfi_interleave(cfi) 4
-# endif
-#define cfi_interleave_is_4(cfi) (cfi_interleave(cfi) == 4)
-#else
-#define cfi_interleave_is_4(cfi) (0)
-#endif
-
-#ifdef CONFIG_MTD_CFI_I8
-# ifdef cfi_interleave
-#  undef cfi_interleave
-#  define cfi_interleave(cfi) ((cfi)->interleave)
-# else
-#  define cfi_interleave(cfi) 8
-# endif
-#define cfi_interleave_is_8(cfi) (cfi_interleave(cfi) == 8)
-#else
-#define cfi_interleave_is_8(cfi) (0)
-#endif
-
-#ifndef cfi_interleave
-#warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work.
-static inline int cfi_interleave(void *cfi)
-{
-	BUG();
-	return 0;
-}
-#endif
-
-static inline int cfi_interleave_supported(int i)
-{
-	switch (i) {
-#ifdef CONFIG_MTD_CFI_I1
-	case 1:
-#endif
-#ifdef CONFIG_MTD_CFI_I2
-	case 2:
-#endif
-#ifdef CONFIG_MTD_CFI_I4
-	case 4:
-#endif
-#ifdef CONFIG_MTD_CFI_I8
-	case 8:
-#endif
-		return 1;
-
-	default:
-		return 0;
-	}
-}
-
 
 /* NB: these values must represents the number of bytes needed to meet the
  *     device type (x8, x16, x32).  Eg. a 32 bit device is 4 x 8 bytes.
diff --git a/include/linux/mtd/cfi_interleave.h b/include/linux/mtd/cfi_interleave.h
new file mode 100644
index 000000000000..03d94a6d11fc
--- /dev/null
+++ b/include/linux/mtd/cfi_interleave.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef __MTD_CFI_INTERLEAVE_H__
+#define __MTD_CFI_INTERLEAVE_H__
+
+#include <linux/bug.h>
+
+#ifdef CONFIG_MTD_CFI_I1
+#define cfi_interleave(cfi) 1
+#define cfi_interleave_is_1(cfi) (cfi_interleave(cfi) == 1)
+#else
+#define cfi_interleave_is_1(cfi) (0)
+#endif
+
+#ifdef CONFIG_MTD_CFI_I2
+# ifdef cfi_interleave
+#  undef cfi_interleave
+#  define cfi_interleave(cfi) ((cfi)->interleave)
+# else
+#  define cfi_interleave(cfi) 2
+# endif
+#define cfi_interleave_is_2(cfi) (cfi_interleave(cfi) == 2)
+#else
+#define cfi_interleave_is_2(cfi) (0)
+#endif
+
+#ifdef CONFIG_MTD_CFI_I4
+# ifdef cfi_interleave
+#  undef cfi_interleave
+#  define cfi_interleave(cfi) ((cfi)->interleave)
+# else
+#  define cfi_interleave(cfi) 4
+# endif
+#define cfi_interleave_is_4(cfi) (cfi_interleave(cfi) == 4)
+#else
+#define cfi_interleave_is_4(cfi) (0)
+#endif
+
+#ifdef CONFIG_MTD_CFI_I8
+# ifdef cfi_interleave
+#  undef cfi_interleave
+#  define cfi_interleave(cfi) ((cfi)->interleave)
+# else
+#  define cfi_interleave(cfi) 8
+# endif
+#define cfi_interleave_is_8(cfi) (cfi_interleave(cfi) == 8)
+#else
+#define cfi_interleave_is_8(cfi) (0)
+#endif
+
+#ifndef cfi_interleave
+#warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work.
+static inline int cfi_interleave(void *cfi)
+{
+	BUG();
+	return 0;
+}
+#endif
+
+static inline int cfi_interleave_supported(int i)
+{
+	switch (i) {
+#ifdef CONFIG_MTD_CFI_I1
+	case 1:
+#endif
+#ifdef CONFIG_MTD_CFI_I2
+	case 2:
+#endif
+#ifdef CONFIG_MTD_CFI_I4
+	case 4:
+#endif
+#ifdef CONFIG_MTD_CFI_I8
+	case 8:
+#endif
+		return 1;
+
+	default:
+		return 0;
+	}
+}
+
+
+#endif /* __MTD_CFI_INTERLEAVE_H__ */
-- 
2.38.1