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author | Jiancheng Xue <xuejiancheng@hisilicon.com> | 2016-05-12 03:41:37 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-08 07:18:39 +0200 |
commit | d0e08b0077f49e209bc90305ddf1ca434ac6cc0e (patch) | |
tree | e76be18d8851920f3270c5e2b0e9318228557f9b /drivers/usb/host/ehci-platform.c | |
parent | Linux 4.7-rc1 (diff) | |
download | linux-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.c | 45 |
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]); |