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 02/22] mfd: omap-usb-tll: Fix channel count detection
Date: Wed, 16 Jan 2013 16:43:33 +0200 [thread overview]
Message-ID: <1358347433-329-3-git-send-email-rogerq@ti.com> (raw)
In-Reply-To: <1358347433-329-1-git-send-email-rogerq@ti.com>
Fix channel count detecion for REV2. Also, don't give up
if we don't recognize the IP Revision. We assume the default
number of channels (i.e. 3) for unrecognized IPs.
Signed-off-by: Roger Quadros <rogerq@ti.com>
---
drivers/mfd/omap-usb-tll.c | 20 +++++++++++---------
1 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/drivers/mfd/omap-usb-tll.c b/drivers/mfd/omap-usb-tll.c
index e459489..9658e18 100644
--- a/drivers/mfd/omap-usb-tll.c
+++ b/drivers/mfd/omap-usb-tll.c
@@ -98,6 +98,7 @@
struct usbtll_omap {
struct clk *usbtll_p1_fck;
struct clk *usbtll_p2_fck;
+ int nch; /* num. of channels */
struct usbhs_omap_platform_data *pdata;
/* secure the register updates */
spinlock_t lock;
@@ -210,7 +211,7 @@ static int usbtll_omap_probe(struct platform_device *pdev)
unsigned reg;
unsigned long flags;
int ret = 0;
- int i, ver, count;
+ int i, ver;
dev_dbg(dev, "starting TI HSUSB TLL Controller\n");
@@ -262,16 +263,18 @@ static int usbtll_omap_probe(struct platform_device *pdev)
ver = usbtll_read(base, OMAP_USBTLL_REVISION);
switch (ver) {
case OMAP_USBTLL_REV1:
- case OMAP_USBTLL_REV2:
- count = OMAP_TLL_CHANNEL_COUNT;
+ tll->nch = OMAP_TLL_CHANNEL_COUNT;
break;
+ case OMAP_USBTLL_REV2:
case OMAP_USBTLL_REV3:
- count = OMAP_REV2_TLL_CHANNEL_COUNT;
+ tll->nch = OMAP_REV2_TLL_CHANNEL_COUNT;
break;
default:
- dev_err(dev, "TLL version failed\n");
- ret = -ENODEV;
- goto err_ioremap;
+ tll->nch = OMAP_TLL_CHANNEL_COUNT;
+ dev_dbg(dev,
+ "USB TLL Rev : 0x%x not recognized, assuming %d channels\n",
+ ver, tll->nch);
+ break;
}
if (is_ehci_tll_mode(pdata->port_mode[0]) ||
@@ -291,7 +294,7 @@ static int usbtll_omap_probe(struct platform_device *pdev)
usbtll_write(base, OMAP_TLL_SHARED_CONF, reg);
/* Enable channels now */
- for (i = 0; i < count; i++) {
+ for (i = 0; i < tll->nch; i++) {
reg = usbtll_read(base, OMAP_TLL_CHANNEL_CONF(i));
if (is_ohci_port(pdata->port_mode[i])) {
@@ -319,7 +322,6 @@ static int usbtll_omap_probe(struct platform_device *pdev)
}
}
-err_ioremap:
spin_unlock_irqrestore(&tll->lock, flags);
iounmap(base);
pm_runtime_put_sync(dev);
--
1.7.4.1
next prev parent reply other threads:[~2013-01-16 14:52 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 ` Roger Quadros [this message]
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 ` [PATCH v6 12/22] mfd: omap-usb-host: know about number of ports from revision register Roger Quadros
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
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