Re: [PATCH 1/4] usb: host: ohci-platform: Add basic runtime PM support
From: Roger Quadros <hidden>
Date: 2017-05-18 09:28:11
Also in:
linux-omap
On 18/05/17 01:59, Tony Lindgren wrote:
This is needed in preparation of adding support for omap3 and later OHCI. The runtime PM will only do something on platforms that implement it. Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Hans de Goede <redacted> Cc: Rob Herring <redacted> Cc: Roger Quadros <redacted> Cc: Yoshihiro Shimoda <redacted> Signed-off-by: Tony Lindgren <redacted>
Acked-by: Roger Quadros <redacted>
quoted hunk
--- drivers/usb/host/ohci-platform.c | 11 +++++++++++ 1 file changed, 11 insertions(+)diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c --- a/drivers/usb/host/ohci-platform.c +++ b/drivers/usb/host/ohci-platform.c@@ -24,6 +24,7 @@ #include <linux/err.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/reset.h> #include <linux/usb/ohci_pdriver.h> #include <linux/usb.h>@@ -51,6 +52,10 @@ static int ohci_platform_power_on(struct platform_device *dev) struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd); int clk, ret, phy_num; + ret = pm_runtime_get_sync(&dev->dev); + if (ret < 0) + return ret; + for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) { ret = clk_prepare_enable(priv->clks[clk]); if (ret)@@ -96,6 +101,8 @@ static void ohci_platform_power_off(struct platform_device *dev) for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--) if (priv->clks[clk]) clk_disable_unprepare(priv->clks[clk]); + + pm_runtime_put_sync(&dev->dev); } static struct hc_driver __read_mostly ohci_platform_hc_driver;@@ -242,6 +249,7 @@ static int ohci_platform_probe(struct platform_device *dev) } #endif + pm_runtime_enable(&dev->dev); if (pdata->power_on) { err = pdata->power_on(dev); if (err < 0)@@ -271,6 +279,7 @@ static int ohci_platform_probe(struct platform_device *dev) if (pdata->power_off) pdata->power_off(dev); err_reset: + pm_runtime_disable(&dev->dev); while (--rst >= 0) reset_control_assert(priv->resets[rst]); err_put_clks:@@ -305,6 +314,8 @@ static int ohci_platform_remove(struct platform_device *dev) usb_put_hcd(hcd); + pm_runtime_disable(&dev->dev); + if (pdata == &ohci_platform_defaults) dev->dev.platform_data = NULL;
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