diff options
Diffstat (limited to 'package/boot/kobs-ng/patches/003-raw-mode.patch')
| -rw-r--r-- | package/boot/kobs-ng/patches/003-raw-mode.patch | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/package/boot/kobs-ng/patches/003-raw-mode.patch b/package/boot/kobs-ng/patches/003-raw-mode.patch new file mode 100644 index 0000000000..5a3be5f058 --- /dev/null +++ b/package/boot/kobs-ng/patches/003-raw-mode.patch @@ -0,0 +1,45 @@ +The downstream Freescale vendor kernel has a patch that allows determining +if raw NAND flash mode is provided via a debugfs file. This is not present +in upstream kernels, but the raw access support was added in the 3.19 +kernel, so we will check the kernel version if we can't find the file. +--- a/src/mtd.c ++++ b/src/mtd.c +@@ -34,6 +34,7 @@ + #include <errno.h> + #include <sys/types.h> + #include <sys/ioctl.h> ++#include <sys/utsname.h> + + #include "mtd.h" + #include "rand.h" +@@ -808,15 +809,27 @@ struct mtd_data *mtd_open(const struct m + md->cfg = *cfg; + + /* check if use new raw access mode */ ++ /* by looking for debugfs from fsl patch */ ++ md->raw_mode_flag = 0; + fp = fopen("/sys/kernel/debug/gpmi-nand/raw_mode", "r"); + if (!fp) { +- md->raw_mode_flag = 0; +- vp(md, "mtd: use legacy raw access mode\n"); ++ /* fallback to kernel version: raw access added in 3.19 */ ++ struct utsname uts; ++ if (!uname(&uts)) { ++ int major = 0, minor = 0; ++ sscanf(uts.release, "%d.%d", &major, &minor); ++ vp(md, "mtd: Linux %d.%d\n", major, minor); ++ if ((major << 8 | minor) > (3 << 8 | 18)) ++ md->raw_mode_flag = 1; ++ } + } else { + fclose(fp); + md->raw_mode_flag = 1; +- vp(md, "mtd: use new bch layout raw access mode\n"); + } ++ if (md->raw_mode_flag) ++ vp(md, "mtd: use new bch layout raw access mode\n"); ++ else ++ vp(md, "mtd: use legacy raw access mode\n"); + + if (plat_config_data->m_u32UseMultiBootArea) { + |