mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Roger Quadros <rogerq@ti.com>
To: <balbi@ti.com>, <sameo@linux.intel.com>, <tony@atomide.com>
Cc: <kishon@ti.com>, <sshtylyov@mvista.com>, <bjorn@mork.no>,
	<linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>, <rogerq@ti.com>
Subject: [PATCH v6 12/22] mfd: omap-usb-host: know about number of ports from revision register
Date: Wed, 16 Jan 2013 16:43:43 +0200	[thread overview]
Message-ID: <1358347433-329-13-git-send-email-rogerq@ti.com> (raw)
In-Reply-To: <1358347433-329-1-git-send-email-rogerq@ti.com>

The revision register should tell us how many ports are present.

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 drivers/mfd/omap-usb-host.c |   33 ++++++++++++++++++++++++++++-----
 1 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 0f190b6..0ab6801 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -91,6 +91,8 @@
 
 
 struct usbhs_hcd_omap {
+	int				nports;
+
 	struct clk			*xclk60mhsp1_ck;
 	struct clk			*xclk60mhsp2_ck;
 	struct clk			*utmi_p1_fck;
@@ -347,8 +349,6 @@ static void omap_usbhs_init(struct device *dev)
 
 	pm_runtime_get_sync(dev);
 	spin_lock_irqsave(&omap->lock, flags);
-	omap->usbhs_rev = usbhs_read(omap->uhh_base, OMAP_UHH_REVISION);
-	dev_dbg(dev, "OMAP UHH_REVISION 0x%x\n", omap->usbhs_rev);
 
 	reg = usbhs_read(omap->uhh_base, OMAP_UHH_HOSTCONFIG);
 	/* setup ULPI bypass and burst configurations */
@@ -483,7 +483,32 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 
 	pm_runtime_enable(dev);
 
-	for (i = 0; i < OMAP3_HS_USB_PORTS; i++)
+	platform_set_drvdata(pdev, omap);
+	pm_runtime_get_sync(dev);
+
+	omap->usbhs_rev = usbhs_read(omap->uhh_base, OMAP_UHH_REVISION);
+
+	/* we need to call runtime suspend before we update omap->nports
+	 * to prevent unbalanced clk_disable()
+	 */
+	pm_runtime_put_sync(dev);
+
+	switch (omap->usbhs_rev) {
+	case OMAP_USBHS_REV1:
+		omap->nports = 3;
+		break;
+	case OMAP_USBHS_REV2:
+		omap->nports = 2;
+		break;
+	default:
+		omap->nports = OMAP3_HS_USB_PORTS;
+		dev_dbg(dev,
+		  "USB HOST Rev : 0x%d not recognized, assuming %d ports\n",
+		   omap->usbhs_rev, omap->nports);
+		break;
+	}
+
+	for (i = 0; i < omap->nports; i++)
 		if (is_ehci_phy_mode(i) || is_ehci_tll_mode(i) ||
 			is_ehci_hsic_mode(i)) {
 			omap->ehci_logic_fck = clk_get(dev, "ehci_logic_fck");
@@ -573,8 +598,6 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 				"failed error:%d\n", ret);
 	}
 
-	platform_set_drvdata(pdev, omap);
-
 	omap_usbhs_init(dev);
 	ret = omap_usbhs_alloc_children(pdev);
 	if (ret) {
-- 
1.7.4.1


  parent reply	other threads:[~2013-01-16 14:44 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-01-16 14:43 [PATCH v6 00/22] OMAP USB Host cleanup Roger Quadros
2013-01-16 14:43 ` [PATCH v6 01/22] mfd: omap-usb-host: Consolidate OMAP USB-HS platform data Roger Quadros
2013-01-16 14:43 ` [PATCH v6 02/22] mfd: omap-usb-tll: Fix channel count detection Roger Quadros
2013-01-16 14:43 ` [PATCH v6 03/22] mfd: omap-usb-tll: Use devm_kzalloc/ioremap and clean up error path Roger Quadros
2013-01-16 19:37   ` Sergei Shtylyov
2013-01-17  9:12     ` Roger Quadros
2013-01-17 10:32       ` Roger Quadros
2013-01-16 14:43 ` [PATCH v6 04/22] mfd: omap-usb-tll: Clean up clock handling Roger Quadros
2013-01-16 14:55   ` Russell King - ARM Linux
2013-01-16 15:05     ` Roger Quadros
2013-01-16 14:43 ` [PATCH v6 05/22] mfd: omap-usb-tll: introduce and use mode_needs_tll() Roger Quadros
2013-01-16 14:43 ` [PATCH v6 06/22] mfd: omap-usb-tll: Check for missing platform data in probe Roger Quadros
2013-01-16 14:43 ` [PATCH v6 07/22] mfd: omap-usb-tll: Fix error message Roger Quadros
2013-01-16 14:43 ` [PATCH v6 08/22] mfd: omap-usb-tll: serialize access to TLL device Roger Quadros
2013-01-16 14:43 ` [PATCH v6 09/22] mfd: omap-usb-tll: Add OMAP5 revision and HSIC support Roger Quadros
2013-01-16 14:43 ` [PATCH v6 10/22] mfd: omap_usb_host: Avoid missing platform data checks in suspend/resume Roger Quadros
2013-01-16 14:43 ` [PATCH v6 11/22] mfd: omap-usb-host: Use devm_kzalloc() and devm_request_and_ioremap() Roger Quadros
2013-01-16 19:34   ` Sergei Shtylyov
2013-01-16 14:43 ` Roger Quadros [this message]
2013-01-16 14:43 ` [PATCH v6 13/22] mfd: omap-usb-host: override number of ports from platform data Roger Quadros
2013-01-16 14:43 ` [PATCH v6 14/22] mfd: omap-usb-host: cleanup clock management code Roger Quadros
2013-01-16 14:43 ` [PATCH v6 15/22] mfd: omap-usb-host: Manage HSIC clocks for HSIC mode Roger Quadros
2013-01-16 14:43 ` [PATCH v6 16/22] mfd: omap-usb-host: Get rid of unnecessary spinlock Roger Quadros
2013-01-16 14:43 ` [PATCH v6 17/22] mfd: omap-usb-host: clean up omap_usbhs_init() Roger Quadros
2013-01-16 14:43 ` [PATCH v6 18/22] USB: ehci-omap: Don't free gpios that we didn't request Roger Quadros
2013-01-16 14:43 ` [PATCH v6 19/22] ARM: OMAP3: clock data: get rid of unused USB host clock aliases and dummies Roger Quadros
2013-01-16 14:43 ` [PATCH v6 20/22] ARM: OMAP4: clock data: get rid of unused USB host clock aliases Roger Quadros
2013-01-16 14:43 ` [PATCH v6 21/22] mfd: omap-usb-host: Don't spam console on clk_set_parent failure Roger Quadros
2013-01-16 14:43 ` [PATCH v6 22/22] mdf: omap-usb-host: get rid of build warning Roger Quadros

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1358347433-329-13-git-send-email-rogerq@ti.com \
    --to=rogerq@ti.com \
    --cc=balbi@ti.com \
    --cc=bjorn@mork.no \
    --cc=kishon@ti.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-usb@vger.kernel.org \
    --cc=sameo@linux.intel.com \
    --cc=sshtylyov@mvista.com \
    --cc=tony@atomide.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox

all inboxes | Powered by JetHome®