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author | root <root@artemis.panaceas.org> | 2015-12-25 04:40:36 +0000 |
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committer | root <root@artemis.panaceas.org> | 2015-12-25 04:40:36 +0000 |
commit | 849369d6c66d3054688672f97d31fceb8e8230fb (patch) | |
tree | 6135abc790ca67dedbe07c39806591e70eda81ce /arch/arm/plat-samsung/pd.c | |
download | linux-3.0.35-kobo-849369d6c66d3054688672f97d31fceb8e8230fb.tar.gz linux-3.0.35-kobo-849369d6c66d3054688672f97d31fceb8e8230fb.tar.bz2 linux-3.0.35-kobo-849369d6c66d3054688672f97d31fceb8e8230fb.zip |
initial_commit
Diffstat (limited to 'arch/arm/plat-samsung/pd.c')
-rw-r--r-- | arch/arm/plat-samsung/pd.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/arch/arm/plat-samsung/pd.c b/arch/arm/plat-samsung/pd.c new file mode 100644 index 00000000..efe1d564 --- /dev/null +++ b/arch/arm/plat-samsung/pd.c @@ -0,0 +1,95 @@ +/* linux/arch/arm/plat-samsung/pd.c + * + * Copyright (c) 2010 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * Samsung Power domain support + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/err.h> +#include <linux/pm_runtime.h> + +#include <plat/pd.h> + +static int samsung_pd_probe(struct platform_device *pdev) +{ + struct samsung_pd_info *pdata = pdev->dev.platform_data; + struct device *dev = &pdev->dev; + + if (!pdata) { + dev_err(dev, "no device data specified\n"); + return -ENOENT; + } + + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + + dev_info(dev, "power domain registered\n"); + return 0; +} + +static int __devexit samsung_pd_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + + pm_runtime_disable(dev); + return 0; +} + +static int samsung_pd_runtime_suspend(struct device *dev) +{ + struct samsung_pd_info *pdata = dev->platform_data; + int ret = 0; + + if (pdata->disable) + ret = pdata->disable(dev); + + dev_dbg(dev, "suspended\n"); + return ret; +} + +static int samsung_pd_runtime_resume(struct device *dev) +{ + struct samsung_pd_info *pdata = dev->platform_data; + int ret = 0; + + if (pdata->enable) + ret = pdata->enable(dev); + + dev_dbg(dev, "resumed\n"); + return ret; +} + +static const struct dev_pm_ops samsung_pd_pm_ops = { + .runtime_suspend = samsung_pd_runtime_suspend, + .runtime_resume = samsung_pd_runtime_resume, +}; + +static struct platform_driver samsung_pd_driver = { + .driver = { + .name = "samsung-pd", + .owner = THIS_MODULE, + .pm = &samsung_pd_pm_ops, + }, + .probe = samsung_pd_probe, + .remove = __devexit_p(samsung_pd_remove), +}; + +static int __init samsung_pd_init(void) +{ + int ret; + + ret = platform_driver_register(&samsung_pd_driver); + if (ret) + printk(KERN_ERR "%s: failed to add PD driver\n", __func__); + + return ret; +} +arch_initcall(samsung_pd_init); |