Calling runtime pm APIs pm_runtime_put_sync() and pm_runtime_get_sync() for enabling/disabling the clocks, sysconfig settings. Enable clock, configure no-idle/standby when active and configure force idle/standby and disable clock when idled. This is taken care by the runtime framework when driver calls the pm_runtime_get_sync and pm_runtime_put_sync APIs. Need to configure MUSB into force standby and force idle mode when usb not used Signed-off-by: Hema HK <hemahk@xxxxxx> Cc: Felipe Balbi <balbi@xxxxxx> Cc: Tony Lindgren <tony@xxxxxxxxxxx> Cc: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx> Cc: Cousson, Benoit <b-cousson@xxxxxx> Cc: Paul Walmsley <paul@xxxxxxxxx> --- drivers/usb/musb/musb_core.h | 2 - drivers/usb/musb/omap2430.c | 79 +++++++++++-------------------------------- 2 files changed, 22 insertions(+), 59 deletions(-) Index: linux-2.6/drivers/usb/musb/musb_core.h =================================================================== --- linux-2.6.orig/drivers/usb/musb/musb_core.h +++ linux-2.6/drivers/usb/musb/musb_core.h @@ -360,7 +360,7 @@ struct musb_context_registers { #if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3) || \ defined(CONFIG_ARCH_OMAP4) - u32 otg_sysconfig, otg_forcestandby; + u32 otg_forcestandby; #endif u8 power; u16 intrtxe, intrrxe; Index: linux-2.6/drivers/usb/musb/omap2430.c =================================================================== --- linux-2.6.orig/drivers/usb/musb/omap2430.c +++ linux-2.6/drivers/usb/musb/omap2430.c @@ -33,6 +33,8 @@ #include <linux/io.h> #include <linux/platform_device.h> #include <linux/dma-mapping.h> +#include <linux/pm_runtime.h> +#include <linux/err.h> #include "musb_core.h" #include "omap2430.h" @@ -40,7 +42,6 @@ struct omap2430_glue { struct device *dev; struct platform_device *musb; - struct clk *clk; }; #define glue_to_musb(g) platform_get_drvdata(g->musb) @@ -216,20 +217,12 @@ static inline void omap2430_low_level_ex l = musb_readl(musb->mregs, OTG_FORCESTDBY); l |= ENABLEFORCE; /* enable MSTANDBY */ musb_writel(musb->mregs, OTG_FORCESTDBY, l); - - l = musb_readl(musb->mregs, OTG_SYSCONFIG); - l |= ENABLEWAKEUP; /* enable wakeup */ - musb_writel(musb->mregs, OTG_SYSCONFIG, l); } static inline void omap2430_low_level_init(struct musb *musb) { u32 l; - l = musb_readl(musb->mregs, OTG_SYSCONFIG); - l &= ~ENABLEWAKEUP; /* disable wakeup */ - musb_writel(musb->mregs, OTG_SYSCONFIG, l); - l = musb_readl(musb->mregs, OTG_FORCESTDBY); l &= ~ENABLEFORCE; /* disable MSTANDBY */ musb_writel(musb->mregs, OTG_FORCESTDBY, l); @@ -309,21 +302,6 @@ static int omap2430_musb_init(struct mus omap2430_low_level_init(musb); - l = musb_readl(musb->mregs, OTG_SYSCONFIG); - l &= ~ENABLEWAKEUP; /* disable wakeup */ - l &= ~NOSTDBY; /* remove possible nostdby */ - l |= SMARTSTDBY; /* enable smart standby */ - l &= ~AUTOIDLE; /* disable auto idle */ - l &= ~NOIDLE; /* remove possible noidle */ - l |= SMARTIDLE; /* enable smart idle */ - /* - * MUSB AUTOIDLE don't work in 3430. - * Workaround by Richard Woodruff/TI - */ - if (!cpu_is_omap3430()) - l |= AUTOIDLE; /* enable auto idle */ - musb_writel(musb->mregs, OTG_SYSCONFIG, l); - l = musb_readl(musb->mregs, OTG_INTERFSEL); if (data->interface_type == MUSB_INTERFACE_UTMI) { @@ -386,7 +364,7 @@ static int __init omap2430_probe(struct struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data; struct platform_device *musb; struct omap2430_glue *glue; - struct clk *clk; + int status = 0; int ret = -ENOMEM; @@ -402,26 +380,12 @@ static int __init omap2430_probe(struct goto err1; } - clk = clk_get(&pdev->dev, "ick"); - if (IS_ERR(clk)) { - dev_err(&pdev->dev, "failed to get clock\n"); - ret = PTR_ERR(clk); - goto err2; - } - - ret = clk_enable(clk); - if (ret) { - dev_err(&pdev->dev, "failed to enable clock\n"); - goto err3; - } - musb->dev.parent = &pdev->dev; musb->dev.dma_mask = &omap2430_dmamask; musb->dev.coherent_dma_mask = omap2430_dmamask; glue->dev = &pdev->dev; glue->musb = musb; - glue->clk = clk; pdata->platform_ops = &omap2430_ops; @@ -431,28 +395,30 @@ static int __init omap2430_probe(struct pdev->num_resources); if (ret) { dev_err(&pdev->dev, "failed to add resources\n"); - goto err4; + goto err2; } ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); if (ret) { dev_err(&pdev->dev, "failed to add platform_data\n"); - goto err4; + goto err2; } ret = platform_device_add(musb); if (ret) { dev_err(&pdev->dev, "failed to register musb device\n"); - goto err4; + goto err2; } - return 0; + pm_runtime_enable(&pdev->dev); + if (pm_runtime_get_sync(&pdev->dev) < 0) { + dev_err(&pdev->dev, "pm_runtime_get_sync FAILED"); + pm_runtime_disable(&pdev->dev); + goto err2; + } -err4: - clk_disable(clk); + return 0; -err3: - clk_put(clk); err2: platform_device_put(musb); @@ -470,8 +436,8 @@ static int __exit omap2430_remove(struct platform_device_del(glue->musb); platform_device_put(glue->musb); - clk_disable(glue->clk); - clk_put(glue->clk); + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); kfree(glue); return 0; @@ -480,13 +446,11 @@ static int __exit omap2430_remove(struct #ifdef CONFIG_PM static void omap2430_save_context(struct musb *musb) { - musb->context.otg_sysconfig = musb_readl(musb->mregs, OTG_SYSCONFIG); musb->context.otg_forcestandby = musb_readl(musb->mregs, OTG_FORCESTDBY); } static void omap2430_restore_context(struct musb *musb) { - musb_writel(musb->mregs, OTG_SYSCONFIG, musb->context.otg_sysconfig); musb_writel(musb->mregs, OTG_FORCESTDBY, musb->context.otg_forcestandby); } @@ -498,8 +462,10 @@ static int omap2430_suspend(struct devic omap2430_low_level_exit(musb); otg_set_suspend(musb->xceiv, 1); omap2430_save_context(musb); - clk_disable(glue->clk); + if (!pm_runtime_suspended(dev)) + if (dev->bus && dev->bus->pm && dev->bus->pm->runtime_suspend) + dev->bus->pm->runtime_suspend(dev); return 0; } @@ -507,13 +473,10 @@ static int omap2430_resume(struct device { struct omap2430_glue *glue = dev_get_drvdata(dev); struct musb *musb = glue_to_musb(glue); - int ret; - ret = clk_enable(glue->clk); - if (ret) { - dev_err(dev, "faled to enable clock\n"); - return ret; - } + if (!pm_runtime_suspended(dev)) + if (dev->bus && dev->bus->pm && dev->bus->pm->runtime_resume) + dev->bus->pm->runtime_resume(dev); omap2430_low_level_init(musb); omap2430_restore_context(musb); -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html