[PATCH v4 17/23] mfd: omap-usb-host: Manage HSIC clocks for HSIC mode

[Roger Quadros]

Enable the optional HSIC clocks (60MHz and 480MHz) for the ports
that are configured in HSIC mode.

Signed-off-by: Roger Quadros <rogerq at ti.com>
---
 drivers/mfd/omap-usb-host.c |   77 +++++++++++++++++++++++++++++++++++++++---
 1 files changed, 71 insertions(+), 6 deletions(-)

diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 6294f13..90dbd17 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -94,6 +94,8 @@
 struct usbhs_hcd_omap {
 	int				nports;
 	struct clk			**utmi_clk;
+	struct clk			**hsic60m_clk;
+	struct clk			**hsic480m_clk;
 
 	struct clk			*xclk60mhsp1_ck;
 	struct clk			*xclk60mhsp2_ck;
@@ -291,7 +293,28 @@ static int usbhs_runtime_resume(struct device *dev)
 		clk_enable(omap->ehci_logic_fck);
 
 	for (i = 0; i < omap->nports; i++) {
-		if (is_ehci_tll_mode(pdata->port_mode[i])) {
+		switch (pdata->port_mode[i]) {
+		case OMAP_EHCI_PORT_MODE_HSIC:
+			if (omap->hsic60m_clk[i]) {
+				r = clk_enable(omap->hsic60m_clk[i]);
+				if (r) {
+					dev_err(dev,
+					 "Can't enable port %d hsic60m clk:%d\n",
+					 i, r);
+				}
+			}
+
+			if (omap->hsic480m_clk[i]) {
+				r = clk_enable(omap->hsic480m_clk[i]);
+				if (r) {
+					dev_err(dev,
+					 "Can't enable port %d hsic480m clk:%d\n",
+					 i, r);
+				}
+			}
+		/* Fall through as HSIC mode needs utmi_clk */
+
+		case OMAP_EHCI_PORT_MODE_TLL:
 			if (omap->utmi_clk[i]) {
 				r = clk_enable(omap->utmi_clk[i]);
 				if (r) {
@@ -300,6 +323,9 @@ static int usbhs_runtime_resume(struct device *dev)
 					 i, r);
 				}
 			}
+			break;
+		default:
+			break;
 		}
 	}
 
@@ -320,9 +346,21 @@ static int usbhs_runtime_suspend(struct device *dev)
 	spin_lock_irqsave(&omap->lock, flags);
 
 	for (i = 0; i < omap->nports; i++) {
-		if (is_ehci_tll_mode(pdata->port_mode[i])) {
+		switch (pdata->port_mode[i]) {
+		case OMAP_EHCI_PORT_MODE_HSIC:
+			if (omap->hsic60m_clk[i])
+				clk_disable(omap->hsic60m_clk[i]);
+
+			if (omap->hsic480m_clk[i])
+				clk_disable(omap->hsic480m_clk[i]);
+		/* Fall through as utmi_clks were used in HSIC mode */
+
+		case OMAP_EHCI_PORT_MODE_TLL:
 			if (omap->utmi_clk[i])
 				clk_disable(omap->utmi_clk[i]);
+			break;
+		default:
+			break;
 		}
 	}
 
@@ -527,7 +565,10 @@ static int __devinit usbhs_omap_probe(struct platform_device *pdev)
 
 	i = sizeof(struct clk *) * omap->nports;
 	omap->utmi_clk = devm_kzalloc(dev, i, GFP_KERNEL);
-	if (!omap->utmi_clk) {
+	omap->hsic480m_clk = devm_kzalloc(dev, i, GFP_KERNEL);
+	omap->hsic60m_clk = devm_kzalloc(dev, i, GFP_KERNEL);
+
+	if (!omap->utmi_clk || !omap->hsic480m_clk || !omap->hsic60m_clk) {
 		dev_err(dev, "Memory allocation failed\n");
 		ret = -ENOMEM;
 		goto err_mem;
@@ -571,7 +612,7 @@ static int __devinit usbhs_omap_probe(struct platform_device *pdev)
 
 	for (i = 0; i < omap->nports; i++) {
 		struct clk *pclk;
-		char clkname[] = "usb_host_hs_utmi_px_clk";
+		char clkname[] = "usb_host_hs_hsic480m_px_clk";
 
 		/* clock names are indexed from 1*/
 		snprintf(clkname, sizeof(clkname),
@@ -587,6 +628,24 @@ static int __devinit usbhs_omap_probe(struct platform_device *pdev)
 				clkname, PTR_ERR(pclk));
 		else
 			omap->utmi_clk[i] = pclk;
+
+		snprintf(clkname, sizeof(clkname),
+				"usb_host_hs_hsic480m_p%d_clk", i + 1);
+		pclk = clk_get(dev, clkname);
+		if (IS_ERR(pclk))
+			dev_dbg(dev, "Failed to get clock : %s : %ld\n",
+				clkname, PTR_ERR(pclk));
+		else
+			omap->hsic480m_clk[i] = pclk;
+
+		snprintf(clkname, sizeof(clkname),
+				"usb_host_hs_hsic60m_p%d_clk", i + 1);
+		pclk = clk_get(dev, clkname);
+		if (IS_ERR(pclk))
+			dev_dbg(dev, "Failed to get clock : %s : %ld\n",
+				clkname, PTR_ERR(pclk));
+		else
+			omap->hsic60m_clk[i] = pclk;
 	}
 
 	if (is_ehci_phy_mode(pdata->port_mode[0])) {
@@ -630,8 +689,11 @@ static int __devinit usbhs_omap_probe(struct platform_device *pdev)
 err_alloc:
 	omap_usbhs_deinit(&pdev->dev);
 
-	for (i = 0; i < omap->nports; i++)
+	for (i = 0; i < omap->nports; i++) {
 		clk_put(omap->utmi_clk[i]);
+		clk_put(omap->hsic60m_clk[i]);
+		clk_put(omap->hsic480m_clk[i]);
+	}
 
 	clk_put(omap->init_60m_fclk);
 
@@ -662,8 +724,11 @@ static int __devexit usbhs_omap_remove(struct platform_device *pdev)
 
 	omap_usbhs_deinit(&pdev->dev);
 
-	for (i = 0; i < omap->nports; i++)
+	for (i = 0; i < omap->nports; i++) {
 		clk_put(omap->utmi_clk[i]);
+		clk_put(omap->hsic60m_clk[i]);
+		clk_put(omap->hsic480m_clk[i]);
+	}
 
 	clk_put(omap->init_60m_fclk);
 	clk_put(omap->xclk60mhsp2_ck);
-- 
1.7.4.1