128 lines
3.2 KiB
Diff
128 lines
3.2 KiB
Diff
From 2319fb88e16e56c64d4f3ab50af69ed6dadbc7b5 Mon Sep 17 00:00:00 2001
|
|
From: Roger Quadros <rogerq@ti.com>
|
|
Date: Tue, 12 Mar 2013 13:24:21 +0200
|
|
Subject: [PATCH 1/6] usb: phy: nop: Manage PHY clock
|
|
|
|
If the PHY has a clock associated to it then manage the clock.
|
|
We just enable the clock in .init() and disable it in .shutdown().
|
|
|
|
Add clk_rate parameter in platform data and configure the
|
|
clock rate during probe if supplied.
|
|
|
|
Signed-off-by: Roger Quadros <rogerq@ti.com>
|
|
Signed-off-by: Felipe Balbi <balbi@ti.com>
|
|
---
|
|
drivers/usb/otg/nop-usb-xceiv.c | 54 ++++++++++++++++++++++++++++++++++++++-
|
|
1 file changed, 53 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/drivers/usb/otg/nop-usb-xceiv.c b/drivers/usb/otg/nop-usb-xceiv.c
|
|
index af52870..17c174f 100644
|
|
--- a/drivers/usb/otg/nop-usb-xceiv.c
|
|
+++ b/drivers/usb/otg/nop-usb-xceiv.c
|
|
@@ -32,10 +32,12 @@
|
|
#include <linux/usb/otg.h>
|
|
#include <linux/usb/nop-usb-xceiv.h>
|
|
#include <linux/slab.h>
|
|
+#include <linux/clk.h>
|
|
|
|
struct nop_usb_xceiv {
|
|
struct usb_phy phy;
|
|
struct device *dev;
|
|
+ struct clk *clk;
|
|
};
|
|
|
|
static struct platform_device *pd;
|
|
@@ -64,6 +66,24 @@ static int nop_set_suspend(struct usb_phy *x, int suspend)
|
|
return 0;
|
|
}
|
|
|
|
+static int nop_init(struct usb_phy *phy)
|
|
+{
|
|
+ struct nop_usb_xceiv *nop = dev_get_drvdata(phy->dev);
|
|
+
|
|
+ if (!IS_ERR(nop->clk))
|
|
+ clk_enable(nop->clk);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void nop_shutdown(struct usb_phy *phy)
|
|
+{
|
|
+ struct nop_usb_xceiv *nop = dev_get_drvdata(phy->dev);
|
|
+
|
|
+ if (!IS_ERR(nop->clk))
|
|
+ clk_disable(nop->clk);
|
|
+}
|
|
+
|
|
static int nop_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
|
|
{
|
|
if (!otg)
|
|
@@ -112,10 +132,34 @@ static int nop_usb_xceiv_probe(struct platform_device *pdev)
|
|
if (pdata)
|
|
type = pdata->type;
|
|
|
|
+ nop->clk = devm_clk_get(&pdev->dev, "main_clk");
|
|
+ if (IS_ERR(nop->clk)) {
|
|
+ dev_dbg(&pdev->dev, "Can't get phy clock: %ld\n",
|
|
+ PTR_ERR(nop->clk));
|
|
+ }
|
|
+
|
|
+ if (!IS_ERR(nop->clk) && pdata && pdata->clk_rate) {
|
|
+ err = clk_set_rate(nop->clk, pdata->clk_rate);
|
|
+ if (err) {
|
|
+ dev_err(&pdev->dev, "Error setting clock rate\n");
|
|
+ return err;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (!IS_ERR(nop->clk)) {
|
|
+ err = clk_prepare(nop->clk);
|
|
+ if (err) {
|
|
+ dev_err(&pdev->dev, "Error preparing clock\n");
|
|
+ return err;
|
|
+ }
|
|
+ }
|
|
+
|
|
nop->dev = &pdev->dev;
|
|
nop->phy.dev = nop->dev;
|
|
nop->phy.label = "nop-xceiv";
|
|
nop->phy.set_suspend = nop_set_suspend;
|
|
+ nop->phy.init = nop_init;
|
|
+ nop->phy.shutdown = nop_shutdown;
|
|
nop->phy.state = OTG_STATE_UNDEFINED;
|
|
|
|
nop->phy.otg->phy = &nop->phy;
|
|
@@ -126,7 +170,7 @@ static int nop_usb_xceiv_probe(struct platform_device *pdev)
|
|
if (err) {
|
|
dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
|
|
err);
|
|
- return err;
|
|
+ goto err_add;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, nop);
|
|
@@ -134,12 +178,20 @@ static int nop_usb_xceiv_probe(struct platform_device *pdev)
|
|
ATOMIC_INIT_NOTIFIER_HEAD(&nop->phy.notifier);
|
|
|
|
return 0;
|
|
+
|
|
+err_add:
|
|
+ if (!IS_ERR(nop->clk))
|
|
+ clk_unprepare(nop->clk);
|
|
+ return err;
|
|
}
|
|
|
|
static int nop_usb_xceiv_remove(struct platform_device *pdev)
|
|
{
|
|
struct nop_usb_xceiv *nop = platform_get_drvdata(pdev);
|
|
|
|
+ if (!IS_ERR(nop->clk))
|
|
+ clk_unprepare(nop->clk);
|
|
+
|
|
usb_remove_phy(&nop->phy);
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
--
|
|
1.7.9.5
|
|
|