From dd129c6374e90e665ec022019bcc2f392f25cf2c Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Mon, 19 Sep 2016 22:21:31 +0100 Subject: MIPS: Malta: Use PIIX4 poweroff driver to power down Remove the platform code used to power down the system, instead relying upon the new PIIX4 poweroff driver. This reduces the amount of platform code required for the Malta board in preparation for allowing it to be part of a more generic kernel. Signed-off-by: Paul Burton Patchwork: https://patchwork.linux-mips.org/patch/14282/ --- arch/mips/mti-malta/Makefile | 2 - arch/mips/mti-malta/malta-pm.c | 96 --------------------------------------- arch/mips/mti-malta/malta-reset.c | 30 ------------ 3 files changed, 128 deletions(-) delete mode 100644 arch/mips/mti-malta/malta-pm.c delete mode 100644 arch/mips/mti-malta/malta-reset.c (limited to 'arch/mips/mti-malta') diff --git a/arch/mips/mti-malta/Makefile b/arch/mips/mti-malta/Makefile index 63940bdce698..17c7fd471a27 100644 --- a/arch/mips/mti-malta/Makefile +++ b/arch/mips/mti-malta/Makefile @@ -13,11 +13,9 @@ obj-y += malta-init.o obj-y += malta-int.o obj-y += malta-memory.o obj-y += malta-platform.o -obj-y += malta-reset.o obj-y += malta-setup.o obj-y += malta-time.o obj-$(CONFIG_MIPS_CMP) += malta-amon.o -obj-$(CONFIG_MIPS_MALTA_PM) += malta-pm.o CFLAGS_malta-dtshim.o = -I$(src)/../../../scripts/dtc/libfdt diff --git a/arch/mips/mti-malta/malta-pm.c b/arch/mips/mti-malta/malta-pm.c deleted file mode 100644 index efbd659fb602..000000000000 --- a/arch/mips/mti-malta/malta-pm.c +++ /dev/null @@ -1,96 +0,0 @@ -/* - * Copyright (C) 2014 Imagination Technologies - * Author: Paul Burton - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - */ - -#include -#include -#include -#include - -#include - -static struct pci_bus *pm_pci_bus; -static resource_size_t pm_io_offset; - -int mips_pm_suspend(unsigned state) -{ - int spec_devid; - u16 sts; - - if (!pm_pci_bus || !pm_io_offset) - return -ENODEV; - - /* Ensure the power button status is clear */ - while (1) { - sts = inw(pm_io_offset + PIIX4_FUNC3IO_PMSTS); - if (!(sts & PIIX4_FUNC3IO_PMSTS_PWRBTN_STS)) - break; - outw(sts, pm_io_offset + PIIX4_FUNC3IO_PMSTS); - } - - /* Enable entry to suspend */ - outw(state | PIIX4_FUNC3IO_PMCNTRL_SUS_EN, - pm_io_offset + PIIX4_FUNC3IO_PMCNTRL); - - /* If the special cycle occurs too soon this doesn't work... */ - mdelay(10); - - /* - * The PIIX4 will enter the suspend state only after seeing a special - * cycle with the correct magic data on the PCI bus. Generate that - * cycle now. - */ - spec_devid = PCI_DEVID(0, PCI_DEVFN(0x1f, 0x7)); - pci_bus_write_config_dword(pm_pci_bus, spec_devid, 0, - PIIX4_SUSPEND_MAGIC); - - /* Give the system some time to power down */ - mdelay(1000); - - return 0; -} - -static int __init malta_pm_setup(void) -{ - struct pci_dev *dev; - int res, io_region = PCI_BRIDGE_RESOURCES; - - /* Find a reference to the PCI bus */ - pm_pci_bus = pci_find_next_bus(NULL); - if (!pm_pci_bus) { - pr_warn("malta-pm: failed to find reference to PCI bus\n"); - return -ENODEV; - } - - /* Find the PIIX4 PM device */ - dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, - PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, - PCI_ANY_ID, NULL); - if (!dev) { - pr_warn("malta-pm: failed to find PIIX4 PM\n"); - return -ENODEV; - } - - /* Request access to the PIIX4 PM IO registers */ - res = pci_request_region(dev, io_region, "PIIX4 PM IO registers"); - if (res) { - pr_warn("malta-pm: failed to request PM IO registers (%d)\n", - res); - pci_dev_put(dev); - return -ENODEV; - } - - /* Find the offset to the PIIX4 PM IO registers */ - pm_io_offset = pci_resource_start(dev, io_region); - - pci_dev_put(dev); - return 0; -} - -late_initcall(malta_pm_setup); diff --git a/arch/mips/mti-malta/malta-reset.c b/arch/mips/mti-malta/malta-reset.c deleted file mode 100644 index dd6f62ad4417..000000000000 --- a/arch/mips/mti-malta/malta-reset.c +++ /dev/null @@ -1,30 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Carsten Langgaard, carstenl@mips.com - * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. - */ -#include -#include -#include - -#include -#include - -static void mips_machine_power_off(void) -{ - mips_pm_suspend(PIIX4_FUNC3IO_PMCNTRL_SUS_TYP_SOFF); - - pr_info("Failed to power down, resetting\n"); - machine_restart(NULL); -} - -static int __init mips_reboot_setup(void) -{ - pm_power_off = mips_machine_power_off; - - return 0; -} -arch_initcall(mips_reboot_setup); -- cgit