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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/powerpc/sysdev/fsl_pmc.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/powerpc/sysdev/fsl_pmc.c')
-rw-r--r-- | kernel/arch/powerpc/sysdev/fsl_pmc.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/kernel/arch/powerpc/sysdev/fsl_pmc.c b/kernel/arch/powerpc/sysdev/fsl_pmc.c new file mode 100644 index 000000000..1d6fd7c59 --- /dev/null +++ b/kernel/arch/powerpc/sysdev/fsl_pmc.c @@ -0,0 +1,92 @@ +/* + * Suspend/resume support + * + * Copyright 2009 MontaVista Software, Inc. + * + * Author: Anton Vorontsov <avorontsov@ru.mvista.com> + * + * 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 <linux/init.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/export.h> +#include <linux/suspend.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/of_address.h> +#include <linux/of_platform.h> + +struct pmc_regs { + __be32 devdisr; + __be32 devdisr2; + __be32 :32; + __be32 :32; + __be32 pmcsr; +#define PMCSR_SLP (1 << 17) +}; + +static struct device *pmc_dev; +static struct pmc_regs __iomem *pmc_regs; + +static int pmc_suspend_enter(suspend_state_t state) +{ + int ret; + + setbits32(&pmc_regs->pmcsr, PMCSR_SLP); + /* At this point, the CPU is asleep. */ + + /* Upon resume, wait for SLP bit to be clear. */ + ret = spin_event_timeout((in_be32(&pmc_regs->pmcsr) & PMCSR_SLP) == 0, + 10000, 10) ? 0 : -ETIMEDOUT; + if (ret) + dev_err(pmc_dev, "tired waiting for SLP bit to clear\n"); + return ret; +} + +static int pmc_suspend_valid(suspend_state_t state) +{ + if (state != PM_SUSPEND_STANDBY) + return 0; + return 1; +} + +static const struct platform_suspend_ops pmc_suspend_ops = { + .valid = pmc_suspend_valid, + .enter = pmc_suspend_enter, +}; + +static int pmc_probe(struct platform_device *ofdev) +{ + pmc_regs = of_iomap(ofdev->dev.of_node, 0); + if (!pmc_regs) + return -ENOMEM; + + pmc_dev = &ofdev->dev; + suspend_set_ops(&pmc_suspend_ops); + return 0; +} + +static const struct of_device_id pmc_ids[] = { + { .compatible = "fsl,mpc8548-pmc", }, + { .compatible = "fsl,mpc8641d-pmc", }, + { }, +}; + +static struct platform_driver pmc_driver = { + .driver = { + .name = "fsl-pmc", + .of_match_table = pmc_ids, + }, + .probe = pmc_probe, +}; + +static int __init pmc_init(void) +{ + return platform_driver_register(&pmc_driver); +} +device_initcall(pmc_init); |