From 0f89ffefa4e122e7e9bc1c2d716c6052b4601b76 Mon Sep 17 00:00:00 2001
From: Mika Westerberg <mika.westerberg@linux.intel.com>
Date: Thu, 4 Jan 2018 12:20:18 +0300
Subject: [PATCH] mfd: lpc_ich: Do not touch SPI-NOR write protection bit on Apollo Lake
Git-commit: 0f89ffefa4e122e7e9bc1c2d716c6052b4601b76
Patch-mainline: v4.16-rc1
References: FATE#326580,bsc#1051510
Just to be on the safe side, don't touch the bit. If write access to the
flash chip is needed, the BIOS needs to enable it explicitly.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/mfd/lpc_ich.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/drivers/mfd/lpc_ich.c b/drivers/mfd/lpc_ich.c
index cf1120abbf52..53dc1a43472c 100644
--- a/drivers/mfd/lpc_ich.c
+++ b/drivers/mfd/lpc_ich.c
@@ -1143,11 +1143,6 @@ static int lpc_ich_init_spi(struct pci_dev *dev)
res->end = res->start + SPIBASE_APL_SZ - 1;
pci_bus_read_config_dword(bus, spi, BCR, &bcr);
- if (!(bcr & BCR_WPD)) {
- bcr |= BCR_WPD;
- pci_bus_write_config_dword(bus, spi, BCR, bcr);
- pci_bus_read_config_dword(bus, spi, BCR, &bcr);
- }
info->writeable = !!(bcr & BCR_WPD);
}
--
2.18.0