diff options
| author | Alex Frid <afrid@nvidia.com> | 2013-09-19 15:08:33 -0700 |
|---|---|---|
| committer | Ajay Nandakumar <anandakumarm@nvidia.com> | 2013-10-03 19:17:28 +0530 |
| commit | 0b2cb04e9f86865f507d92e677b9443849d845aa (patch) | |
| tree | f990a9459b0d2b411502b7eb1dffbd1ab1bf3725 /arch/arm/mach-tegra/clock.c | |
| parent | 1023b7ebd6009895dee1f92f96aaa05ffb9bdbb8 (diff) | |
ARM: tegra12: clock: Support shared bus rate retention
Added Tegra12 shared bus rate retention mechanism: do not scale bus
clock to minimum rate if there is no rate request from shared users;
instead keep current bus rate.
This mechanism allows to reduce voltage scaling and pll re-locking
steps during shared bus on/off transitions provided underlying physical
clock is disabled when all floor and bandwidth users are disabled. It
should not be used with always-on buses like emc or system clock. For
now, retention is not enabled on any Tegra12 shared buses.
Change-Id: I9bc611311d0a801f11c094154a09d3456322395e
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-on: http://git-master/r/278178
Tested-by: Prashant Malani <pmalani@nvidia.com>
Reviewed-by: Yu-Huan Hsu <yhsu@nvidia.com>
(cherry picked from commit 2e9524c6c42fc92bec83f032d6fe3571748e2059)
Signed-off-by: Ajay Nandakumar <anandakumarm@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra/clock.c')
| -rw-r--r-- | arch/arm/mach-tegra/clock.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/clock.c b/arch/arm/mach-tegra/clock.c index 23be76bde7b5..a3857d54ce5a 100644 --- a/arch/arm/mach-tegra/clock.c +++ b/arch/arm/mach-tegra/clock.c @@ -1684,6 +1684,11 @@ static int clk_debugfs_register_one(struct clk *c) if (!d) goto err_out; + d = debugfs_create_x32("shared_bus_flags", S_IRUGO, c->dent, + (u32 *)&c->shared_bus_flags); + if (!d) + goto err_out; + d = debugfs_create_file( "max", parent_rate_mode, c->dent, c, &max_fops); if (!d) |