kernel: add preliminary support for linux 3.3

[openwrt.git] / target / linux / generic / patches-3.3 / 470-mtd_m25p80_add_pm25lv_flash_support.patch

diff --git a/target/linux/generic/patches-3.3/470-mtd_m25p80_add_pm25lv_flash_support.patch b/target/linux/generic/patches-3.3/470-mtd_m25p80_add_pm25lv_flash_support.patch
new file mode 100644 (file)
index 0000000..ff27d04
--- /dev/null
+++ b/target/linux/generic/patches-3.3/470-mtd_m25p80_add_pm25lv_flash_support.patch
@@ -0,0 +1,39 @@
+--- a/drivers/mtd/devices/m25p80.c
++++ b/drivers/mtd/devices/m25p80.c
+@@ -45,6 +45,7 @@
+ #define       OPCODE_BE_4K            0x20    /* Erase 4KiB block */
+ #define       OPCODE_BE_32K           0x52    /* Erase 32KiB block */
+ #define       OPCODE_CHIP_ERASE       0xc7    /* Erase whole flash chip */
++#define       OPCODE_BE_4K_PMC        0xd7    /* Erase 4KiB block on PMC chips*/
+ #define       OPCODE_SE               0xd8    /* Sector erase (usually 64KiB) */
+ #define       OPCODE_RDID             0x9f    /* Read JEDEC ID */
+ 
+@@ -625,6 +626,7 @@ struct flash_info {
+       u16             flags;
+ #define       SECT_4K         0x01            /* OPCODE_BE_4K works uniformly */
+ #define       M25P_NO_ERASE   0x02            /* No erase command needed */
++#define       SECT_4K_PMC     0x04            /* OPCODE_BE_4K_PMC works uniformly */
+ };
+ 
+ #define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags)    \
+@@ -686,6 +688,10 @@ static const struct spi_device_id m25p_i
+       { "mx25l25635e", INFO(0xc22019, 0, 64 * 1024, 512, 0) },
+       { "mx25l25655e", INFO(0xc22619, 0, 64 * 1024, 512, 0) },
+ 
++      /* PMC -- pm25x "blocks" are 32K, sectors are 4K */
++      { "pm25lv512", INFO(0, 0, 32 * 1024, 2, SECT_4K_PMC) },
++      { "pm25lv010", INFO(0, 0, 32 * 1024, 4, SECT_4K_PMC) },
++
+       /* Spansion -- single (large) sector size only, at least
+        * for the chips listed here (without boot sectors).
+        */
+@@ -921,6 +927,9 @@ static int __devinit m25p_probe(struct s
+       if (info->flags & SECT_4K) {
+               flash->erase_opcode = OPCODE_BE_4K;
+               flash->mtd.erasesize = 4096;
++      } else if (info->flags & SECT_4K_PMC) {
++              flash->erase_opcode = OPCODE_BE_4K_PMC;
++              flash->mtd.erasesize = 4096;
+       } else {
+               flash->erase_opcode = OPCODE_SE;
+               flash->mtd.erasesize = info->sector_size;