pxa168fb: prepare the clock
Add missing prepare/unprepare operations for fbi->clk,
this fixes following kernel warning:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at drivers/clk/clk.c:874 clk_core_enable+0x2c/0x1b0
Enabling unprepared disp0_clk
Modules linked in:
CPU: 0 PID: 1 Comm: swapper Not tainted
4.18.0-rc8-00032-g02b43ddd4f21-dirty #25
Hardware name: Marvell MMP2 (Device Tree Support)
[<
c010f7cc>] (unwind_backtrace) from [<
c010cc6c>] (show_stack+0x10/0x14)
[<
c010cc6c>] (show_stack) from [<
c011dab4>] (__warn+0xd8/0xf0)
[<
c011dab4>] (__warn) from [<
c011db10>] (warn_slowpath_fmt+0x44/0x6c)
[<
c011db10>] (warn_slowpath_fmt) from [<
c043898c>] (clk_core_enable+0x2c/0x1b0)
[<
c043898c>] (clk_core_enable) from [<
c0439ec8>] (clk_core_enable_lock+0x18/0x2c)
[<
c0439ec8>] (clk_core_enable_lock) from [<
c0436698>] (pxa168fb_probe+0x464/0x6ac)
[<
c0436698>] (pxa168fb_probe) from [<
c04779a0>] (platform_drv_probe+0x48/0x94)
[<
c04779a0>] (platform_drv_probe) from [<
c0475bec>] (driver_probe_device+0x328/0x470)
[<
c0475bec>] (driver_probe_device) from [<
c0475de4>] (__driver_attach+0xb0/0x124)
[<
c0475de4>] (__driver_attach) from [<
c0473c38>] (bus_for_each_dev+0x64/0xa0)
[<
c0473c38>] (bus_for_each_dev) from [<
c0474ee0>] (bus_add_driver+0x1b8/0x230)
[<
c0474ee0>] (bus_add_driver) from [<
c0476a20>] (driver_register+0xac/0xf0)
[<
c0476a20>] (driver_register) from [<
c0102dd4>] (do_one_initcall+0xb8/0x1f0)
[<
c0102dd4>] (do_one_initcall) from [<
c0b010a0>] (kernel_init_freeable+0x294/0x2e0)
[<
c0b010a0>] (kernel_init_freeable) from [<
c07e9eb8>] (kernel_init+0x8/0x10c)
[<
c07e9eb8>] (kernel_init) from [<
c01010e8>] (ret_from_fork+0x14/0x2c)
Exception stack(0xd008bfb0 to 0xd008bff8)
bfa0:
00000000 00000000 00000000 00000000
bfc0:
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
bfe0:
00000000 00000000 00000000 00000000 00000013 00000000
---[ end trace
c0af40f9e2ed7cb4 ]---
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
[b.zolnierkie: enhance patch description a bit]
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>