[PATCH v3 0/3] usb: renesas_usbhs: add reset_control and multiple clocks management

@@ -12,6 +12,7 @@
 #include <linux/of_device.h>
 #include <linux/of_gpio.h>
 #include <linux/pm_runtime.h>
+#include <linux/reset.h>
 #include <linux/slab.h>
 #include <linux/sysfs.h>
 #include "common.h"

@@ -574,6 +575,10 @@ static int usbhs_probe(struct platform_device *pdev)
 			return PTR_ERR(priv->edev);
 	}
 
+	priv->rsts = devm_reset_control_array_get_optional_shared(&pdev->dev);
+	if (IS_ERR(priv->rsts))
+		return PTR_ERR(priv->rsts);
+
 	/*
 	 * care platform info
 	 */

@@ -658,6 +663,10 @@ static int usbhs_probe(struct platform_device *pdev)
 	/* dev_set_drvdata should be called after usbhs_mod_init */
 	platform_set_drvdata(pdev, priv);
 
+	ret = reset_control_deassert(priv->rsts);
+	if (ret)
+		goto probe_fail_rst;
+
 	/*
 	 * deviece reset here because
 	 * USB device might be used in boot loader.

@@ -711,6 +720,8 @@ static int usbhs_probe(struct platform_device *pdev)
 	return ret;
 
 probe_end_mod_exit:
+	reset_control_assert(priv->rsts);
+probe_fail_rst:
 	usbhs_mod_remove(priv);
 probe_end_fifo_exit:
 	usbhs_fifo_remove(priv);

@@ -739,6 +750,7 @@ static int usbhs_remove(struct platform_device *pdev)
 	pm_runtime_disable(&pdev->dev);
 
 	usbhs_platform_call(priv, hardware_exit, pdev);
+	reset_control_assert(priv->rsts);
 	usbhs_mod_remove(priv);
 	usbhs_fifo_remove(priv);
 	usbhs_pipe_remove(priv);

@@ -10,6 +10,7 @@
 
 #include <linux/extcon.h>
 #include <linux/platform_device.h>
+#include <linux/reset.h>
 #include <linux/usb/renesas_usbhs.h>
 
 struct usbhs_priv;

@@ -277,6 +278,7 @@ struct usbhs_priv {
 	struct usbhs_fifo_info fifo_info;
 
 	struct phy *phy;
+	struct reset_control *rsts;
 };
 
 /*

@@ -37,6 +37,8 @@ Optional properties:
   - dmas: Must contain a list of references to DMA specifiers.
   - dma-names : named "ch%d", where %d is the channel number ranging from zero
                 to the number of channels (DnFIFOs) minus one.
+  - clock-names: For a "renesas,rcar-gen3-usbhs" compatible device,
+		 "hsusb" and "ehci/ohci" can be set.
 
 Example:
 	usbhs: usb@e6590000 {

@@ -5,6 +5,7 @@
  * Copyright (C) 2011 Renesas Solutions Corp.
  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
  */
+#include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/gpio.h>
 #include <linux/io.h>

@@ -341,6 +342,11 @@ static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
 		/* enable PM */
 		pm_runtime_get_sync(dev);
 
+		/* enable clks if exist */
+		if (priv->num_clks &&
+		    clk_bulk_prepare_enable(priv->num_clks, priv->clks))
+			return;
+
 		/* enable platform power */
 		usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
 

@@ -353,6 +359,10 @@ static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
 		/* disable platform power */
 		usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
 
+		/* disable clks if exist */
+		if (priv->num_clks)
+			clk_bulk_disable_unprepare(priv->num_clks, priv->clks);
+
 		/* disable PM */
 		pm_runtime_put_sync(dev);
 	}

@@ -620,6 +630,13 @@ static int usbhs_probe(struct platform_device *pdev)
 		break;
 	}
 
+	if (priv->dparam.type == USBHS_TYPE_RCAR_GEN3 ||
+	    priv->dparam.type == USBHS_TYPE_RCAR_GEN3_WITH_PLL) {
+		priv->clks[0].id = "hsusb";
+		priv->clks[1].id = "ehci/ohci";
+		priv->num_clks = ARRAY_SIZE(priv->clks);
+	};
+
 	/* set driver callback functions for platform */
 	dfunc			= &info->driver_callback;
 	dfunc->notify_hotplug	= usbhsc_drvcllbck_notify_hotplug;

@@ -667,6 +684,12 @@ static int usbhs_probe(struct platform_device *pdev)
 	if (ret)
 		goto probe_fail_rst;
 
+	if (priv->num_clks) {
+		ret = clk_bulk_get(&pdev->dev, priv->num_clks, priv->clks);
+		if (ret == -EPROBE_DEFER)
+			goto probe_fail_clks;
+	}
+
 	/*
 	 * deviece reset here because
 	 * USB device might be used in boot loader.

@@ -720,6 +743,8 @@ static int usbhs_probe(struct platform_device *pdev)
 	return ret;
 
 probe_end_mod_exit:
+	clk_bulk_put(priv->num_clks, priv->clks);
+probe_fail_clks:
 	reset_control_assert(priv->rsts);
 probe_fail_rst:
 	usbhs_mod_remove(priv);

@@ -8,6 +8,7 @@
 #ifndef RENESAS_USB_DRIVER_H
 #define RENESAS_USB_DRIVER_H
 
+#include <linux/clk.h>
 #include <linux/extcon.h>
 #include <linux/platform_device.h>
 #include <linux/reset.h>

@@ -279,6 +280,8 @@ struct usbhs_priv {
 
 	struct phy *phy;
 	struct reset_control *rsts;
+	struct clk_bulk_data clks[2];
+	int num_clks;
 };
 
 /*