linux-kernel - [PATCH v4 06/23] mfd: omap-usb-tll: introduce and use mode_needs

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Date:	Mon, 10 Dec 2012 12:20:16 +0200
From:	Roger Quadros <rogerq@...com>
To:	<balbi@...com>, <sameo@...ux.intel.com>, <tony@...mide.com>
CC:	<paul@...an.com>, <keshava_mgowda@...com>, <sshtylyov@...sta.com>,
	<bjorn@...k.no>, <rogerq@...com>, <linux-usb@...r.kernel.org>,
	<linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH v4 06/23] mfd: omap-usb-tll: introduce and use mode_needs_tll()

This is a handy macro to check if the port requires the
USB TLL module or not. Use it to Enable the TLL module and manage
the clocks.

Signed-off-by: Roger Quadros <rogerq@...com>
---
 drivers/mfd/omap-usb-tll.c |   20 ++++++++++++--------
 1 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/mfd/omap-usb-tll.c b/drivers/mfd/omap-usb-tll.c
index 7d0f6cf..07370a3 100644
--- a/drivers/mfd/omap-usb-tll.c
+++ b/drivers/mfd/omap-usb-tll.c
@@ -95,6 +95,10 @@
 
 #define is_ehci_tll_mode(x)	(x == OMAP_EHCI_PORT_MODE_TLL)
 
+/* only PHY and UNUSED modes don't need TLL */
+#define omap_usb_mode_needs_tll(x)	((x != OMAP_USBHS_PORT_MODE_UNUSED) &&\
+					 (x != OMAP_EHCI_PORT_MODE_PHY))
+
 struct usbtll_omap {
 	int					nch;	/* num. of channels */
 	struct usbtll_omap_platform_data	*pdata;
@@ -211,6 +215,7 @@ static int __devinit usbtll_omap_probe(struct platform_device *pdev)
 	unsigned long				flags;
 	int					ret = 0;
 	int					i, ver;
+	bool needs_tll;
 
 	dev_dbg(dev, "starting TI HSUSB TLL Controller\n");
 
@@ -278,12 +283,11 @@ static int __devinit usbtll_omap_probe(struct platform_device *pdev)
 			tll->ch_clk[i] = fck;
 	}
 
-	if (is_ehci_tll_mode(pdata->port_mode[0]) ||
-	    is_ehci_tll_mode(pdata->port_mode[1]) ||
-	    is_ehci_tll_mode(pdata->port_mode[2]) ||
-	    is_ohci_port(pdata->port_mode[0]) ||
-	    is_ohci_port(pdata->port_mode[1]) ||
-	    is_ohci_port(pdata->port_mode[2])) {
+	needs_tll = false;
+	for (i = 0; i < tll->nch; i++)
+		needs_tll |= omap_usb_mode_needs_tll(pdata->port_mode[i]);
+
+	if (needs_tll) {
 
 		/* Program Common TLL register */
 		reg = usbtll_read(base, OMAP_TLL_SHARED_CONF);
@@ -371,7 +375,7 @@ static int usbtll_runtime_resume(struct device *dev)
 	spin_lock_irqsave(&tll->lock, flags);
 
 	for (i = 0; i < tll->nch; i++) {
-		if (is_ehci_tll_mode(pdata->port_mode[i])) {
+		if (omap_usb_mode_needs_tll(pdata->port_mode[i])) {
 			int r;
 
 			if (!tll->ch_clk[i])
@@ -407,7 +411,7 @@ static int usbtll_runtime_suspend(struct device *dev)
 	spin_lock_irqsave(&tll->lock, flags);
 
 	for (i = 0; i < tll->nch; i++) {
-		if (is_ehci_tll_mode(pdata->port_mode[i])) {
+		if (omap_usb_mode_needs_tll(pdata->port_mode[i])) {
 			if (tll->ch_clk[i])
 				clk_disable(tll->ch_clk[i]);
 		}
-- 
1.7.4.1

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