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usb: ohci-at91: Check result of clk_enable() 

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Andrey Smirnov 2017-03-08 14:09:02 -08:00 committed by Sascha Hauer
parent fb1ff1794a
commit bf09557360
1 changed files with 20 additions and 4 deletions
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24
drivers/usb/host/ohci-at91.c
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@ -34,10 +34,23 @@ struct ohci_at91_priv {
struct ohci_regs __iomem *regs; struct ohci_regs __iomem *regs;
}; };
static void at91_start_clock(struct ohci_at91_priv *ohci_at91) static int at91_start_clock(struct ohci_at91_priv *ohci_at91)
{ {
clk_enable(ohci_at91->iclk); int ret;
clk_enable(ohci_at91->fclk);
ret = clk_enable(ohci_at91->iclk);
if (ret < 0) {
dev_err(ohci_at91->dev, "Failed to enable 'iclk'\n");
return ret;
}
ret = clk_enable(ohci_at91->fclk);
if (ret < 0) {
dev_err(ohci_at91->dev, "Failed to enable 'fclk'\n");
return ret;
}
return 0;
} }
static void at91_stop_clock(struct ohci_at91_priv *ohci_at91) static void at91_stop_clock(struct ohci_at91_priv *ohci_at91)
@ -48,6 +61,7 @@ static void at91_stop_clock(struct ohci_at91_priv *ohci_at91)
static int at91_ohci_probe(struct device_d *dev) static int at91_ohci_probe(struct device_d *dev)
{ {
int ret;
struct resource *io; struct resource *io;
struct ohci_at91_priv *ohci_at91 = xzalloc(sizeof(*ohci_at91)); struct ohci_at91_priv *ohci_at91 = xzalloc(sizeof(*ohci_at91));
@ -76,7 +90,9 @@ static int at91_ohci_probe(struct device_d *dev)
/* /*
* Start the USB clocks. * Start the USB clocks.
*/ */
at91_start_clock(ohci_at91); ret = at91_start_clock(ohci_at91);
if (ret < 0)
return ret;
/* /*
* The USB host controller must remain in reset. * The USB host controller must remain in reset.