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authorJiancheng Xue <xuejiancheng@hisilicon.com>2016-05-12 03:41:37 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-06-08 07:18:39 +0200
commitd0e08b0077f49e209bc90305ddf1ca434ac6cc0e (patch)
treee76be18d8851920f3270c5e2b0e9318228557f9b /drivers/usb/host/ehci-platform.c
parentLinux 4.7-rc1 (diff)
downloadlinux-d0e08b0077f49e209bc90305ddf1ca434ac6cc0e.tar.xz
linux-d0e08b0077f49e209bc90305ddf1ca434ac6cc0e.zip
usb: ehci-platform: add reset controller number in struct ehci_platform_priv
Some ehci compatible controllers have more than one reset signal lines, e.g., Synopsys DWC USB2.0 Host-AHB Controller has two resets hreset_i_n and phy_rst_i_n. Two more resets are added in this patch in order for this kind of controller to use this driver directly. Signed-off-by: Jiancheng Xue <xuejiancheng@hisilicon.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to '')
-rw-r--r--drivers/usb/host/ehci-platform.c45
1 files changed, 28 insertions, 17 deletions
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index 1757ebb471b6..bc33f45c3c28 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -39,11 +39,12 @@
#define DRIVER_DESC "EHCI generic platform driver"
#define EHCI_MAX_CLKS 3
+#define EHCI_MAX_RSTS 3
#define hcd_to_ehci_priv(h) ((struct ehci_platform_priv *)hcd_to_ehci(h)->priv)
struct ehci_platform_priv {
struct clk *clks[EHCI_MAX_CLKS];
- struct reset_control *rst;
+ struct reset_control *rsts[EHCI_MAX_RSTS];
struct phy **phys;
int num_phys;
bool reset_on_resume;
@@ -149,7 +150,7 @@ static int ehci_platform_probe(struct platform_device *dev)
struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
struct ehci_platform_priv *priv;
struct ehci_hcd *ehci;
- int err, irq, phy_num, clk = 0;
+ int err, irq, phy_num, clk = 0, rst;
if (usb_disabled())
return -ENODEV;
@@ -234,16 +235,22 @@ static int ehci_platform_probe(struct platform_device *dev)
}
}
- priv->rst = devm_reset_control_get_optional(&dev->dev, NULL);
- if (IS_ERR(priv->rst)) {
- err = PTR_ERR(priv->rst);
- if (err == -EPROBE_DEFER)
- goto err_put_clks;
- priv->rst = NULL;
- } else {
- err = reset_control_deassert(priv->rst);
- if (err)
- goto err_put_clks;
+ for (rst = 0; rst < EHCI_MAX_RSTS; rst++) {
+ priv->rsts[rst] = of_reset_control_get_by_index(
+ dev->dev.of_node, rst);
+ if (IS_ERR(priv->rsts[rst])) {
+ err = PTR_ERR(priv->rsts[rst]);
+ if (err == -EPROBE_DEFER)
+ goto err_reset;
+ priv->rsts[rst] = NULL;
+ break;
+ }
+
+ err = reset_control_deassert(priv->rsts[rst]);
+ if (err) {
+ reset_control_put(priv->rsts[rst]);
+ goto err_reset;
+ }
}
if (pdata->big_endian_desc)
@@ -300,8 +307,10 @@ err_power:
if (pdata->power_off)
pdata->power_off(dev);
err_reset:
- if (priv->rst)
- reset_control_assert(priv->rst);
+ while (--rst >= 0) {
+ reset_control_assert(priv->rsts[rst]);
+ reset_control_put(priv->rsts[rst]);
+ }
err_put_clks:
while (--clk >= 0)
clk_put(priv->clks[clk]);
@@ -319,15 +328,17 @@ static int ehci_platform_remove(struct platform_device *dev)
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
- int clk;
+ int clk, rst;
usb_remove_hcd(hcd);
if (pdata->power_off)
pdata->power_off(dev);
- if (priv->rst)
- reset_control_assert(priv->rst);
+ for (rst = 0; rst < EHCI_MAX_RSTS && priv->rsts[rst]; rst++) {
+ reset_control_assert(priv->rsts[rst]);
+ reset_control_put(priv->rsts[rst]);
+ }
for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++)
clk_put(priv->clks[clk]);