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ba5a37e521
Move the kirkwood DT support into mach-mvebu, and make them part of ARCH_MULTI_V5. Minimal changes have been made in order to make it boot. Cleanup of the header files and integration with mvebu will take place in following patches. In order to help Debian transition between mach-kirkwood and mach-mvebu, the DTS files are compiled for both, allowing Debian to continue using mach-kirkwood until all remaining boards are supported by mach-mvebu. Debian is then expected to simply swap from mach-kirkwood to mach-mvebu and mach-kirkwood will be removed. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Acked-by: Arnd Bergmann <arnd@arndb.de> Tested-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by: Jason Cooper <jason@lakedaemon.net>
77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
/*
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* Power Management driver for Marvell Kirkwood SoCs
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*
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* Copyright (C) 2013 Ezequiel Garcia <ezequiel@free-electrons.com>
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* Copyright (C) 2010 Simon Guinot <sguinot@lacie.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License,
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* version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/suspend.h>
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#include <linux/io.h>
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#include <mach/bridge-regs.h>
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static void __iomem *ddr_operation_base;
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static void __iomem *memory_pm_ctrl;
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static void kirkwood_low_power(void)
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{
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u32 mem_pm_ctrl;
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mem_pm_ctrl = readl(memory_pm_ctrl);
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/* Set peripherals to low-power mode */
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writel_relaxed(~0, memory_pm_ctrl);
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/* Set DDR in self-refresh */
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writel_relaxed(0x7, ddr_operation_base);
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/*
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* Set CPU in wait-for-interrupt state.
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* This disables the CPU core clocks,
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* the array clocks, and also the L2 controller.
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*/
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cpu_do_idle();
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writel_relaxed(mem_pm_ctrl, memory_pm_ctrl);
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}
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static int kirkwood_suspend_enter(suspend_state_t state)
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{
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switch (state) {
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case PM_SUSPEND_STANDBY:
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kirkwood_low_power();
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int kirkwood_pm_valid_standby(suspend_state_t state)
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{
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return state == PM_SUSPEND_STANDBY;
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}
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static const struct platform_suspend_ops kirkwood_suspend_ops = {
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.enter = kirkwood_suspend_enter,
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.valid = kirkwood_pm_valid_standby,
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};
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int __init kirkwood_pm_init(void)
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{
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ddr_operation_base = ioremap(DDR_OPERATION_BASE, 4);
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memory_pm_ctrl = ioremap(MEMORY_PM_CTRL_PHYS, 4);
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suspend_set_ops(&kirkwood_suspend_ops);
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return 0;
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}
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