programmer: Add bitbanging programmer driver for Linux libgpiod
With this driver, any single board computer, old smartphone, etc. with
a few spare GPIOs can be used for flashrom.
Tested by reading of a 2048 kB flash chip on a Qualcomm MSM8916 SoC
@800 MHz, ran the following command:
time flashrom -p linux_gpiod:gpiochip=0,cs=18,sck=19,mosi=13,miso=56 -r test.bin
This command uses /dev/gpiochip0 with the specified GPIO numbers for the
SPI lines. All arguments are mandatory.
Output:
[...]
Found GigaDevice flash chip "GD25LQ16" (2048 kB, SPI) on linux_gpiod.
[...]
real 1m 33.96s
Change-Id: Icad3eb7764f28feaea51bda3a7893da724c86d06
Signed-off-by: Steve Markgraf <steve@steve-m.de>
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/73290
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/meson_options.txt b/meson_options.txt
index 2d7f5a6..616a9f4 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -10,8 +10,8 @@
'group_ftdi', 'group_i2c', 'group_jlink', 'group_pci', 'group_serial', 'group_usb',
'atahpt', 'atapromise', 'atavia', 'buspirate_spi', 'ch341a_spi', 'ch347_spi', 'dediprog', 'developerbox_spi',
'digilent_spi', 'dirtyjtag_spi', 'drkaiser', 'dummy', 'ft2232_spi', 'gfxnvidia', 'internal', 'it8212',
- 'jlink_spi', 'linux_mtd', 'linux_spi', 'mediatek_i2c_spi', 'mstarddc_spi', 'nic3com', 'nicintel',
- 'nicintel_eeprom', 'nicintel_spi', 'nicnatsemi', 'nicrealtek', 'ogp_spi', 'parade_lspcon',
+ 'jlink_spi', 'linux_gpio_spi', 'linux_mtd', 'linux_spi', 'mediatek_i2c_spi', 'mstarddc_spi', 'nic3com',
+ 'nicintel', 'nicintel_eeprom', 'nicintel_spi', 'nicnatsemi', 'nicrealtek', 'ogp_spi', 'parade_lspcon',
'pickit2_spi', 'pony_spi', 'raiden_debug_spi', 'rayer_spi', 'realtek_mst_i2c_spi', 'satamv',
'satasii', 'serprog', 'stlinkv3_spi', 'usbblaster_spi',
], description: 'Active programmers')