From 40fb08e9172c88e5399655cb4b098e0af83ff7dd Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sun, 8 Dec 2019 17:40:10 -0700 Subject: [PATCH] x86: apl: Add PCH driver Add a driver for the Apollo Lake Platform Controller Hub. It does not have any functionality and is just a placeholder for now. Signed-off-by: Simon Glass Reviewed-by: Bin Meng --- arch/x86/cpu/apollolake/Makefile | 1 + arch/x86/cpu/apollolake/pch.c | 36 ++++++++++++++++++++++ arch/x86/include/asm/arch-apollolake/pch.h | 9 ++++++ 3 files changed, 46 insertions(+) create mode 100644 arch/x86/cpu/apollolake/pch.c create mode 100644 arch/x86/include/asm/arch-apollolake/pch.h diff --git a/arch/x86/cpu/apollolake/Makefile b/arch/x86/cpu/apollolake/Makefile index 31045a03c1..36eefcbad7 100644 --- a/arch/x86/cpu/apollolake/Makefile +++ b/arch/x86/cpu/apollolake/Makefile @@ -7,5 +7,6 @@ obj-$(CONFIG_SPL_BUILD) += systemagent.o obj-y += hostbridge.o obj-y += itss.o obj-y += lpc.o +obj-y += pch.o obj-y += pmc.o obj-y += uart.o diff --git a/arch/x86/cpu/apollolake/pch.c b/arch/x86/cpu/apollolake/pch.c new file mode 100644 index 0000000000..1a5a985221 --- /dev/null +++ b/arch/x86/cpu/apollolake/pch.c @@ -0,0 +1,36 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 Google LLC + */ + +#include +#include +#include +#include +#include + +#define BIOS_CTRL 0xdc + +static int apl_set_spi_protect(struct udevice *dev, bool protect) +{ + if (spl_phase() == PHASE_SPL) + return lpc_set_spi_protect(dev, BIOS_CTRL, protect); + + return 0; +} + +static const struct pch_ops apl_pch_ops = { + .set_spi_protect = apl_set_spi_protect, +}; + +static const struct udevice_id apl_pch_ids[] = { + { .compatible = "intel,apl-pch" }, + { } +}; + +U_BOOT_DRIVER(apl_pch) = { + .name = "apl_pch", + .id = UCLASS_PCH, + .of_match = apl_pch_ids, + .ops = &apl_pch_ops, +}; diff --git a/arch/x86/include/asm/arch-apollolake/pch.h b/arch/x86/include/asm/arch-apollolake/pch.h new file mode 100644 index 0000000000..bf3e1670d2 --- /dev/null +++ b/arch/x86/include/asm/arch-apollolake/pch.h @@ -0,0 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright 2019 Google LLC + */ + +#ifndef _ASM_ARCH_PCH_H +#define _ASM_ARCH_PCH_H + +#endif /* _ASM_ARCH_PCH_H */ -- 2.39.5