Attention is currently required from: Anastasia Klimchuk, Nikolai Artemiev, Stefan Reinauer.

Vasily Galkin has uploaded this change for review.

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flashchips: Add WP features for Winbond W25X20

WP-related registers list from official datasheet
https://www.winbond.com/resource-files/w25x20cl_revf%2020150806.pdf

Commandline options tested with ft2232_spi-based "Tigard" programmer:
wp-disable wp-enable wp-list wp-status wp-range=0,0 wp-range=0,0x00040000

Signed-off-by: Vasily Galkin <galkin-vv@ya.ru>
Change-Id: I82c0cc52ca2a78d27f513234cc12d3e09d8905a5
---
M flashchips.c
1 file changed, 8 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/30/77530/1

diff --git a/flashchips.c b/flashchips.c
index 6920c03..4edceb0 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -19763,7 +19763,7 @@
 		.total_size	= 256,
 		.page_size	= 256,
 		.feature_bits	= FEATURE_WRSR_WREN,
-		.tested		= TEST_OK_PREW,
+		.tested		= TEST_OK_PREWB,
 		.probe		= PROBE_SPI_RDID,
 		.probe_timing	= TIMING_ZERO,
 		.block_erasers	=
@@ -19784,6 +19784,13 @@
 		.write		= SPI_CHIP_WRITE256,
 		.read		= SPI_CHIP_READ,
 		.voltage	= {2700, 3600},
+		.reg_bits	=
+		{
+			.srp    = {STATUS1, 7, RW},
+			.bp     = {{STATUS1, 2, RW}, {STATUS1, 3, RW}},
+			.tb     = {STATUS1, 5, RW},
+		},
+		.decode_range	= DECODE_RANGE_SPI25,
 	},
 
 	{

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