On 8 January 2015 at 08:10, Peng Fan Peng.Fan@freescale.com wrote:
Add CONFIG_SYS_FSL_QSPI_AHB in header file to enable AHB in driver. In order to count the time, add CONFIG_CMD_TIME.
Using AHB read can improve the the read speed about 30%.
AHB read: => time sf read 0x8f800000 0 100000 SF: 1048576 bytes @ 0x0 Read: OK time: 0.174 seconds
=> time sf read 0x8f800000 1000000 100000 SF: 1048576 bytes @ 0x1000000 Read: OK time: 0.174 seconds
IP read: => time sf read 0x8f800000 0 100000 SF: 1048576 bytes @ 0x0 Read: OK time: 0.227 seconds
=> time sf read 0x8f800000 1000000 100000 SF: 1048576 bytes @ 0x1000000 Read: OK time: 0.227 seconds
Note: Quad read is not supported in driver, now. In my side, using AHB and Quad read can achieve about 16MB/s. Anyway, I have plan to reimplement the driver using DTB and DM, then make the code cleaner and more feature can be added.
Signed-off-by: Peng Fan Peng.Fan@freescale.com
include/configs/mx6sxsabresd.h | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/include/configs/mx6sxsabresd.h b/include/configs/mx6sxsabresd.h index b40dc19..fbaae3f 100644 --- a/include/configs/mx6sxsabresd.h +++ b/include/configs/mx6sxsabresd.h @@ -235,6 +235,8 @@ /* FLASH and environment organization */ #define CONFIG_SYS_NO_FLASH
+#define CONFIG_CMD_TIME
#define CONFIG_FSL_QSPI
#ifdef CONFIG_FSL_QSPI @@ -244,6 +246,7 @@ #define CONFIG_SPI_FLASH_SPANSION #define CONFIG_SPI_FLASH_STMICRO #define CONFIG_SYS_FSL_QSPI_LE +#define CONFIG_SYS_FSL_QSPI_AHB #ifdef CONFIG_MX6SX_SABRESD_REVA #define FSL_QSPI_FLASH_SIZE SZ_16M
#else
1.8.4
Applied to u-boot-spi/master
thanks!