diff options
Diffstat (limited to 'arch/arm/mach-omap1')
| -rw-r--r-- | arch/arm/mach-omap1/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/mach-omap1/pm_bus.c | 98 |
2 files changed, 99 insertions, 1 deletions
diff --git a/arch/arm/mach-omap1/Makefile b/arch/arm/mach-omap1/Makefile index facfaeb1ae5c..9a304d854e33 100644 --- a/arch/arm/mach-omap1/Makefile +++ b/arch/arm/mach-omap1/Makefile @@ -12,7 +12,7 @@ obj-$(CONFIG_OMAP_MPU_TIMER) += time.o obj-$(CONFIG_OMAP_32K_TIMER) += timer32k.o # Power Management -obj-$(CONFIG_PM) += pm.o sleep.o +obj-$(CONFIG_PM) += pm.o sleep.o pm_bus.o # DSP obj-$(CONFIG_OMAP_MBOX_FWK) += mailbox_mach.o diff --git a/arch/arm/mach-omap1/pm_bus.c b/arch/arm/mach-omap1/pm_bus.c new file mode 100644 index 000000000000..8b66392be745 --- /dev/null +++ b/arch/arm/mach-omap1/pm_bus.c @@ -0,0 +1,98 @@ +/* + * Runtime PM support code for OMAP1 + * + * Author: Kevin Hilman, Deep Root Systems, LLC + * + * Copyright (C) 2010 Texas Instruments, Inc. + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/io.h> +#include <linux/pm_runtime.h> +#include <linux/platform_device.h> +#include <linux/mutex.h> +#include <linux/clk.h> +#include <linux/err.h> + +#include <plat/omap_device.h> +#include <plat/omap-pm.h> + +#ifdef CONFIG_PM_RUNTIME +static int omap1_pm_runtime_suspend(struct device *dev) +{ + struct clk *iclk, *fclk; + int ret = 0; + + dev_dbg(dev, "%s\n", __func__); + + ret = pm_generic_runtime_suspend(dev); + + fclk = clk_get(dev, "fck"); + if (!IS_ERR(fclk)) { + clk_disable(fclk); + clk_put(fclk); + } + + iclk = clk_get(dev, "ick"); + if (!IS_ERR(iclk)) { + clk_disable(iclk); + clk_put(iclk); + } + + return 0; +}; + +static int omap1_pm_runtime_resume(struct device *dev) +{ + int ret = 0; + struct clk *iclk, *fclk; + + dev_dbg(dev, "%s\n", __func__); + + iclk = clk_get(dev, "ick"); + if (!IS_ERR(iclk)) { + clk_enable(iclk); + clk_put(iclk); + } + + fclk = clk_get(dev, "fck"); + if (!IS_ERR(fclk)) { + clk_enable(fclk); + clk_put(fclk); + } + + return pm_generic_runtime_resume(dev); +}; + +static int __init omap1_pm_runtime_init(void) +{ + const struct dev_pm_ops *pm; + struct dev_pm_ops *omap_pm; + + pm = platform_bus_get_pm_ops(); + if (!pm) { + pr_err("%s: unable to get dev_pm_ops from platform_bus\n", + __func__); + return -ENODEV; + } + + omap_pm = kmemdup(pm, sizeof(struct dev_pm_ops), GFP_KERNEL); + if (!omap_pm) { + pr_err("%s: unable to alloc memory for new dev_pm_ops\n", + __func__); + return -ENOMEM; + } + + omap_pm->runtime_suspend = omap1_pm_runtime_suspend; + omap_pm->runtime_resume = omap1_pm_runtime_resume; + + platform_bus_set_pm_ops(omap_pm); + + return 0; +} +core_initcall(omap1_pm_runtime_init); +#endif /* CONFIG_PM_RUNTIME */ |