In order to support wake up from suspend use the pinctrl framework to put the USB host pins in IDLE state during suspend.
CC: Samuel Ortiz <sa...@linux.intel.com> Signed-off-by: Roger Quadros <rog...@ti.com> --- drivers/mfd/omap-usb-host.c | 46 +++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 46 insertions(+), 0 deletions(-) diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c index 6601a49..171cc3b 100644 --- a/drivers/mfd/omap-usb-host.c +++ b/drivers/mfd/omap-usb-host.c @@ -31,6 +31,7 @@ #include <linux/of.h> #include <linux/of_platform.h> #include <linux/err.h> +#include <linux/pinctrl/consumer.h> #include "omap-usb.h" @@ -111,6 +112,10 @@ struct usbhs_hcd_omap { struct usbhs_omap_platform_data *pdata; u32 usbhs_rev; + + struct pinctrl *pinctrl; + struct pinctrl_state *pins_default; + struct pinctrl_state *pins_idle; }; /*-------------------------------------------------------------------------*/ @@ -325,6 +330,10 @@ static int usbhs_runtime_resume(struct device *dev) dev_dbg(dev, "usbhs_runtime_resume\n"); + if (!IS_ERR(omap->pins_default)) + if (pinctrl_select_state(omap->pinctrl, omap->pins_default)) + dev_err(dev, "Could not select DEFAULT pin state\n"); + omap_tll_enable(pdata); if (!IS_ERR(omap->ehci_logic_fck)) @@ -402,6 +411,10 @@ static int usbhs_runtime_suspend(struct device *dev) omap_tll_disable(pdata); + if (!IS_ERR(omap->pins_idle)) + if (pinctrl_select_state(omap->pinctrl, omap->pins_idle)) + dev_err(dev, "Could not select IDLE pin state\n"); + return 0; } @@ -608,6 +621,30 @@ static int usbhs_omap_probe(struct platform_device *pdev) return -ENOMEM; } + omap->pinctrl = devm_pinctrl_get(dev); + if (!IS_ERR(omap->pinctrl)) { + omap->pins_default = pinctrl_lookup_state(omap->pinctrl, + PINCTRL_STATE_DEFAULT); + if (IS_ERR(omap->pins_default)) + dev_err(dev, "Could not get DEFAULT state pins\n"); + + omap->pins_idle = pinctrl_lookup_state(omap->pinctrl, + PINCTRL_STATE_IDLE); + if (IS_ERR(omap->pins_idle)) + dev_err(dev, "Could not get IDLE state pins\n"); + + } else { + dev_info(dev, "pinctrl_get error\n"); + if (PTR_ERR(omap->pinctrl) == -EPROBE_DEFER) { + dev_info(dev, "defer\n"); + return -EPROBE_DEFER; + } + + omap->pins_default = omap->pins_idle = ERR_PTR(-EINVAL); + dev_dbg(dev, "Proceeding without pinctrl: %ld\n", + PTR_ERR(omap->pinctrl)); + } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); omap->uhh_base = devm_ioremap_resource(dev, res); if (IS_ERR(omap->uhh_base)) @@ -796,6 +833,10 @@ static int usbhs_omap_probe(struct platform_device *pdev) } } + if (!IS_ERR(omap->pins_default)) + if (pinctrl_select_state(omap->pinctrl, omap->pins_default)) + dev_err(dev, "Could not select DEFAULT pin state\n"); + return 0; err_alloc: @@ -872,6 +913,11 @@ static int usbhs_omap_remove(struct platform_device *pdev) /* remove children */ device_for_each_child(&pdev->dev, NULL, usbhs_omap_remove_child); + + if (!IS_ERR(omap->pins_idle)) + if (pinctrl_select_state(omap->pinctrl, omap->pins_idle)) + dev_err(&pdev->dev, "Could not select IDLE pin state\n"); + return 0; } -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html