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Message-ID: <1357138842-28964-5-git-send-email-rogerq@ti.com>
Date: Wed, 2 Jan 2013 17:00:24 +0200
From: Roger Quadros <rogerq@...com>
To: <balbi@...com>, <sameo@...ux.intel.com>, <tony@...mide.com>
CC: <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 v5 04/22] mfd: omap-usb-tll: Clean up clock handling
Every channel has a functional clock that is similarly named.
It makes sense to use a for loop to manage these clocks as OMAPs
can come with up to 3 channels.
Dynamically allocate and get channel clocks depending on the
number of clocks avaiable on the platform.
Signed-off-by: Roger Quadros <rogerq@...com>
---
drivers/mfd/omap-usb-tll.c | 93 +++++++++++++++++++++++++++-----------------
1 files changed, 57 insertions(+), 36 deletions(-)
diff --git a/drivers/mfd/omap-usb-tll.c b/drivers/mfd/omap-usb-tll.c
index e225cbc..238d05d 100644
--- a/drivers/mfd/omap-usb-tll.c
+++ b/drivers/mfd/omap-usb-tll.c
@@ -96,10 +96,9 @@
#define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL)
struct usbtll_omap {
- struct clk *usbtll_p1_fck;
- struct clk *usbtll_p2_fck;
int nch; /* num. of channels */
struct usbtll_omap_platform_data *pdata;
+ struct clk **ch_clk;
/* secure the register updates */
spinlock_t lock;
};
@@ -225,26 +224,10 @@ static int usbtll_omap_probe(struct platform_device *pdev)
tll->pdata = pdata;
- tll->usbtll_p1_fck = clk_get(dev, "usb_tll_hs_usb_ch0_clk");
- if (IS_ERR(tll->usbtll_p1_fck)) {
- ret = PTR_ERR(tll->usbtll_p1_fck);
- dev_err(dev, "usbtll_p1_fck failed error:%d\n", ret);
- return ret;
- }
-
- tll->usbtll_p2_fck = clk_get(dev, "usb_tll_hs_usb_ch1_clk");
- if (IS_ERR(tll->usbtll_p2_fck)) {
- ret = PTR_ERR(tll->usbtll_p2_fck);
- dev_err(dev, "usbtll_p2_fck failed error:%d\n", ret);
- goto err_p2_fck;
- }
-
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_request_and_ioremap(dev, res);
- if (!base) {
- ret = -EADDRNOTAVAIL;
- goto err_res;
- }
+ if (!base)
+ return -EADDRNOTAVAIL;
platform_set_drvdata(pdev, tll);
pm_runtime_enable(dev);
@@ -269,6 +252,32 @@ static int usbtll_omap_probe(struct platform_device *pdev)
break;
}
+ spin_unlock_irqrestore(&tll->lock, flags);
+
+ tll->ch_clk = devm_kzalloc(dev, sizeof(struct clk * [tll->nch]),
+ GFP_KERNEL);
+ if (!tll->ch_clk) {
+ ret = -ENOMEM;
+ dev_err(dev, "Couldn't allocate memory for channel clocks\n");
+ goto err_clk_alloc;
+ }
+
+ spin_lock_irqsave(&tll->lock, flags);
+
+ for (i = 0; i < tll->nch; i++) {
+ char clkname[] = "usb_tll_hs_usb_chx_clk";
+ struct clk *fck;
+
+ snprintf(clkname, sizeof(clkname),
+ "usb_tll_hs_usb_ch%d_clk", i);
+ fck = clk_get(dev, clkname);
+
+ if (IS_ERR(fck))
+ dev_dbg(dev, "can't get clock : %s\n", clkname);
+ else
+ 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]) ||
@@ -320,11 +329,9 @@ static int usbtll_omap_probe(struct platform_device *pdev)
return 0;
-err_res:
- clk_put(tll->usbtll_p2_fck);
-
-err_p2_fck:
- clk_put(tll->usbtll_p1_fck);
+err_clk_alloc:
+ pm_runtime_put_sync(dev);
+ pm_runtime_disable(dev);
return ret;
}
@@ -338,9 +345,11 @@ err_p2_fck:
static int usbtll_omap_remove(struct platform_device *pdev)
{
struct usbtll_omap *tll = platform_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; i < tll->nch; i++)
+ clk_put(tll->ch_clk[i]);
- clk_put(tll->usbtll_p2_fck);
- clk_put(tll->usbtll_p1_fck);
pm_runtime_disable(&pdev->dev);
return 0;
}
@@ -350,6 +359,7 @@ static int usbtll_runtime_resume(struct device *dev)
struct usbtll_omap *tll = dev_get_drvdata(dev);
struct usbtll_omap_platform_data *pdata = tll->pdata;
unsigned long flags;
+ int i;
dev_dbg(dev, "usbtll_runtime_resume\n");
@@ -360,11 +370,20 @@ static int usbtll_runtime_resume(struct device *dev)
spin_lock_irqsave(&tll->lock, flags);
- if (is_ehci_tll_mode(pdata->port_mode[0]))
- clk_enable(tll->usbtll_p1_fck);
+ for (i = 0; i < tll->nch; i++) {
+ if (is_ehci_tll_mode(pdata->port_mode[i])) {
+ int r;
- if (is_ehci_tll_mode(pdata->port_mode[1]))
- clk_enable(tll->usbtll_p2_fck);
+ if (!tll->ch_clk[i])
+ continue;
+
+ r = clk_enable(tll->ch_clk[i]);
+ if (r) {
+ dev_err(dev,
+ "Error enabling ch %d clock: %d\n", i, r);
+ }
+ }
+ }
spin_unlock_irqrestore(&tll->lock, flags);
@@ -376,6 +395,7 @@ static int usbtll_runtime_suspend(struct device *dev)
struct usbtll_omap *tll = dev_get_drvdata(dev);
struct usbtll_omap_platform_data *pdata = tll->pdata;
unsigned long flags;
+ int i;
dev_dbg(dev, "usbtll_runtime_suspend\n");
@@ -386,11 +406,12 @@ static int usbtll_runtime_suspend(struct device *dev)
spin_lock_irqsave(&tll->lock, flags);
- if (is_ehci_tll_mode(pdata->port_mode[0]))
- clk_disable(tll->usbtll_p1_fck);
-
- if (is_ehci_tll_mode(pdata->port_mode[1]))
- clk_disable(tll->usbtll_p2_fck);
+ for (i = 0; i < tll->nch; i++) {
+ if (is_ehci_tll_mode(pdata->port_mode[i])) {
+ if (tll->ch_clk[i])
+ clk_disable(tll->ch_clk[i]);
+ }
+ }
spin_unlock_irqrestore(&tll->lock, flags);
--
1.7.4.1
--
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