source: trunk/target/linux/ar71xx/patches-3.3/208-MIPS-ath79-db120-spi-chipselect-fix.patch @ 31117

Last change on this file since 31117 was 31117, checked in by juhosg, 4 years ago

ar71xx: improve SPI flash read/write performance

mtd_speedtest results:

page write speed

old new delta

DB120 209 KiB/s 226 KiB/s +8.13%
TL-WR1043ND v1 122 KiB/s 148 KiB/s +21.31%
TL-WR703N v1 153 KiB/s 194 KiB/s +26.80%
TL-MR3220 v1 130 KiB/s 156 KiB/s +20.00%
TL-WR2543ND v1 158 KiB/s 202 KiB/s +27.85%
TL-WR741ND v2 122 KiB/s 152 KiB/s +24.59%
ALFA AP96 229 KiB/s 260 KiB/s +13.54%
WNDR3700 202 KiB/s 223 KiB/s +10.40%

page read speed

old new delta

DB120 691 KiB/s 929 KiB/s +34.44%
TL-WR1043ND v1 372 KiB/s 754 KiB/s +102.69%
TL-WR703N v1 375 KiB/s 745 KiB/s +98.67%
TL-MR3220 v1 372 KiB/s 752 KiB/s +102.15%
TL-WR2543ND v1 307 KiB/s 564 KiB/s +83.71%
TL-WR741ND v2 315 KiB/s 525 KiB/s +66.67%
ALFA AP96 515 KiB/s 702 KiB/s +36.31%
WNDR3700 515 KiB/s 697 KiB/s +35.34%

File size: 466 bytes
  • arch/mips/ath79/mach-db120.c

    a b static struct gpio_keys_button db120_gpi 
    9595        }, 
    9696}; 
    9797 
     98static struct ath79_spi_controller_data db120_spi0_data = { 
     99        .cs_type = ATH79_SPI_CS_TYPE_INTERNAL, 
     100        .cs_line = 0, 
     101}; 
     102 
    98103static struct spi_board_info db120_spi_info[] = { 
    99104        { 
    100105                .bus_num        = 0, 
    101106                .chip_select    = 0, 
    102107                .max_speed_hz   = 25000000, 
    103108                .modalias       = "s25sl064a", 
     109                .controller_data = &db120_spi0_data, 
    104110        } 
    105111}; 
    106112 
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