diff options
| author | Alexandre Bailon <abailon@baylibre.com> | 2016-11-21 08:59:30 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-11-21 17:35:37 +0100 |
| commit | 09721ba6daa19e75446bac463acf9c28e8ed9acc (patch) | |
| tree | 940c11cc39abaa82b39d9830e3fd29d7f60cf327 /drivers/usb/musb | |
| parent | 35bd67b2e566e400d7c6984cd0b1d10cef58f799 (diff) | |
| download | linux-09721ba6daa19e75446bac463acf9c28e8ed9acc.tar.bz2 | |
usb: musb: da8xx: Call earlier clk_prepare_enable()
The first attempt to read a register may fail because the clock may not
be enabled, and then the probe of musb driver will fail.
Call clk_prepare_enable() before the first register read.
Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/musb')
| -rw-r--r-- | drivers/usb/musb/da8xx.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c index f205a0381fcc..373b61786fe0 100644 --- a/drivers/usb/musb/da8xx.c +++ b/drivers/usb/musb/da8xx.c @@ -369,6 +369,12 @@ static int da8xx_musb_init(struct musb *musb) musb->mregs += DA8XX_MENTOR_CORE_OFFSET; + ret = clk_prepare_enable(glue->clk); + if (ret) { + dev_err(glue->dev, "failed to enable clock\n"); + return ret; + } + /* Returns zero if e.g. not clocked */ rev = musb_readl(reg_base, DA8XX_USB_REVISION_REG); if (!rev) @@ -380,12 +386,6 @@ static int da8xx_musb_init(struct musb *musb) goto fail; } - ret = clk_prepare_enable(glue->clk); - if (ret) { - dev_err(glue->dev, "failed to enable clock\n"); - goto fail; - } - setup_timer(&otg_workaround, otg_timer, (unsigned long)musb); /* Reset the controller */ @@ -395,7 +395,7 @@ static int da8xx_musb_init(struct musb *musb) ret = phy_init(glue->phy); if (ret) { dev_err(glue->dev, "Failed to init phy.\n"); - goto err_phy_init; + goto fail; } ret = phy_power_on(glue->phy); @@ -415,9 +415,8 @@ static int da8xx_musb_init(struct musb *musb) err_phy_power_on: phy_exit(glue->phy); -err_phy_init: - clk_disable_unprepare(glue->clk); fail: + clk_disable_unprepare(glue->clk); return ret; } |