[PATCH] ARM: pxa: ulpi: fix ulpi timeout and slowpath warn

[Robert Jarzmik]

Igor Grinberg <grinberg at compulab.co.il> writes:

> Both cm-x300 and pxa3xx-ulpi use the plain clk_{en,dis}able() API.
> With the new clocking framework this results in warnings of type:
> ------------[ cut here ]------------
> WARNING: CPU: 0 PID: 1 at drivers/clk/clk.c:714 clk_core_enable+0x90/0x9c
> Modules linked in:
> CPU: 0 PID: 1 Comm: swapper Not tainted 4.15.0-rc5-cm-x300+ #15
> Hardware name: CM-X300 module
> [<c001007c>] (unwind_backtrace) from [<c000df94>] (show_stack+0x10/0x14)
> [<c000df94>] (show_stack) from [<c00199a8>] (__warn+0xd8/0x100)
> [<c00199a8>] (__warn) from [<c0019a0c>] (warn_slowpath_null+0x3c/0x48)
> [<c0019a0c>] (warn_slowpath_null) from [<c024e8c0>] (clk_core_enable+0x90/0x9c)
> [<c024e8c0>] (clk_core_enable) from [<c024ea54>] (clk_core_enable_lock+0x18/0x2c)
> [<c024ea54>] (clk_core_enable_lock) from [<c0016994>] (cm_x300_u2d_init+0x4c/0xe8)
> [<c0016994>] (cm_x300_u2d_init) from [<c00163e0>] (pxa3xx_u2d_probe+0xe0/0x244)
> [<c00163e0>] (pxa3xx_u2d_probe) from [<c0283de0>] (platform_drv_probe+0x38/0x88)
> ...
> ------------[ cut here ]------------
> and alike...
>
> And finally, it results in:
> ------------[ cut here ]------------
> pxa310_ulpi_poll: ULPI access timed out!
> OTG transceiver init failed
> ------------[ cut here ]------------
>
> It might be that disabling the warning in kernel config would also do
> the job, but IMO a better solution would be to switch to
> clk_prepare_enable() and clk_disable_unprepare() APIs.
>
> Signed-off-by: Igor Grinberg <grinberg at compulab.co.il>
Applied to pxa/for-next, thanks.

Cheers.

--
Robert