lspcon_i2c_spi.c: Add SPI-master support for PS17{5,6}

This adds support for the Parade lspcon usb-c to HDMI protocol
translater part that is i2c-controlled. The support allows the
host to reach the SPI ROM that hangs off the part where it
stores its firmware.

Usage is as follows:
	flashrom -p lspcon_i2c_spi:bus=X
	where X is the bus number.

BUG=b:148746232
BRANCH=none
TEST=tested with following commands, read/write/erase works good.
	flashrom -p lspcon_i2c_spi:bus=7 -r /tmp/foo;
	flashrom -p lspcon_i2c_spi:bus=7 -E;
	flashrom -p lspcon_i2c_spi:bus=7 -w /tmp/foo;

Change-Id: I039e683252cfaf1ffef8694a3e8081b1b6b944f7
Signed-off-by: Shiyu Sun <sshiyu@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/39687
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/flashrom.c b/flashrom.c
index 081b705d..07ce734b 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -389,6 +389,18 @@ const struct programmer_entry programmer_table[] = {
 	},
 #endif
 
+#if CONFIG_LSPCON_I2C_SPI == 1
+	{
+		.name			= "lspcon_i2c_spi",
+		.type			= OTHER,
+		.devs.note		= "Device files /dev/i2c-*.\n",
+		.init			= lspcon_i2c_spi_init,
+		.map_flash_region	= fallback_map,
+		.unmap_flash_region	= fallback_unmap,
+		.delay			= internal_delay,
+	},
+#endif
+
 #if CONFIG_USBBLASTER_SPI == 1
 	{
 		.name			= "usbblaster_spi",