diff options
Diffstat (limited to 'board/hammer/board.h')
| -rw-r--r-- | board/hammer/board.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/board/hammer/board.h b/board/hammer/board.h index 7b713d05f2..c150ac40bd 100644 --- a/board/hammer/board.h +++ b/board/hammer/board.h @@ -130,9 +130,17 @@ #define CONFIG_BOARD_PRE_INIT #define CONFIG_WATCHDOG_HELP -/* Enlarge the allowed write count */ +/* + * Enlarge the allowed write / read count for trackpad debug + * In the extended I2C reading over I2C ( >= 128 bytes ), the header size + * have to be 6 bytes instead of 4 bytes for receiving packets. Moreover, + * buffer size have to be power of two. + */ #undef CONFIG_USB_I2C_MAX_WRITE_COUNT -#define CONFIG_USB_I2C_MAX_WRITE_COUNT 124 +#define CONFIG_USB_I2C_MAX_WRITE_COUNT (128 - 4) /* 4 is maximum header size */ + +#undef CONFIG_USB_I2C_MAX_READ_COUNT +#define CONFIG_USB_I2C_MAX_READ_COUNT (1024 - 6) /* 6 is maximum header size */ /* No lid switch */ #undef CONFIG_LID_SWITCH |