linux/arch
Anson Huang 3d27bc5c31 ARM: imx: correct the hardware clock gate setting for shared nodes
For those clk gates which hold share count, since its is_enabled
callback is only checking the share count rather than reading
the hardware register setting, in the late phase of kernel bootup,
the clk_disable_unused action will NOT handle the scenario of
share_count is 0 but the hardware setting is enabled, actually,
U-Boot normally enables all clk gates, then those shared clk gates
will be always enabled until they are used by some modules.

So the problem would be: when kernel boot up, the usecount cat
from clk tree is 0, but the clk gates actually is enabled in
hardware register, it will confuse user and bring unnecessary power
consumption.

This patch adds .disable_unused callback and using hardware register
check for .is_enabled callback of shared nodes to handle such scenario
in late phase of kernel boot up, then the hardware status will match the
clk tree info.

Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
2015-01-05 20:53:05 +08:00
..
alpha arch: Cleanup read_barrier_depends() and comments 2014-12-11 21:15:05 -05:00
arc Minor updates for ARC for 3.19 2014-12-18 16:26:41 -08:00
arm ARM: imx: correct the hardware clock gate setting for shared nodes 2015-01-05 20:53:05 +08:00
arm64 kernel: Provide READ_ONCE and ASSIGN_ONCE 2014-12-20 16:48:59 -08:00
avr32 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
blackfin TTY/Serial driver patches for 3.19-rc1 2014-12-14 15:23:32 -08:00
c6x
cris CRISv32: Remove last remnants of ETRAX_SPI_MMC_BOARD 2014-12-20 00:06:13 +01:00
frv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
hexagon Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux-hexagon-kernel 2014-12-19 17:57:51 -08:00
ia64 __get_cpu_var removed from rest of tree, drop reference from comments in arch/ia64 2014-12-19 17:07:27 -08:00
m32r Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
m68k Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
metag arch: Add lightweight memory barriers dma_rmb() and dma_wmb() 2014-12-11 21:15:06 -05:00
microblaze Microblaze patches for 3.19-rc1 2014-12-17 09:54:05 -08:00
mips kernel: Provide READ_ONCE and ASSIGN_ONCE 2014-12-20 16:48:59 -08:00
mn10300 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
nios2 nios2/uaccess: fix sparse errors 2014-12-17 13:53:41 +08:00
openrisc
parisc parisc: percpu: update comments referring to __get_cpu_var 2014-12-13 12:42:53 -08:00
powerpc CONFIG_PM_RUNTIME elimination for 3.19-rc1 2014-12-20 13:37:44 -08:00
s390 kernel: Provide READ_ONCE and ASSIGN_ONCE 2014-12-20 16:48:59 -08:00
score
sh PM: Eliminate CONFIG_PM_RUNTIME 2014-12-19 22:55:06 +01:00
sparc sparc32: destroy_context() and switch_mm() needs to disable interrupts. 2014-12-18 12:47:54 -05:00
tile Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2014-12-16 13:54:16 -08:00
um TTY/Serial driver patches for 3.19-rc1 2014-12-14 15:23:32 -08:00
unicore32 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-12-11 14:27:06 -08:00
x86 kernel: Provide READ_ONCE and ASSIGN_ONCE 2014-12-20 16:48:59 -08:00
xtensa Xtensa fixes for 3.19: 2014-12-16 14:08:53 -08:00
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