Kever,

On Thu, Oct 30, 2014 at 10:10 PM, Kever Yang [off-list ref] wrote:

The rockchip clock driver use CLK_IGNORE_UNUSED flag to make sure
all the clocks are available like default power on state.
We have implement the clock manage in most of rockchip drivers,
it is time to remove it for power save.
Instead we add CLK_IGNORE_UNUSED for some clock nodes which should
be on during boot or no module driver in kernel will initialize it.

Signed-off-by: Kever Yang <redacted>
---

Changes in v3:
- get CLK_DIVIDER_READ_ONLY tag back fro armcores
- add CLK_IGNORE_UNUSED tag for cs_dbg, pclk_dgb_pre and pclk_rkpwm

Changes in v2:
- get some clock ID back
- add CLK_IGNORE_UNUSED tag for aclk_strc and aclk_core in clk-rk3188.c
- add CLK_IGNORE_UNUSED tag for rk3288 dwc2

 drivers/clk/rockchip/clk-rk3188.c |  36 +++++-----
 drivers/clk/rockchip/clk-rk3288.c | 140 +++++++++++++++++++-------------------
 drivers/clk/rockchip/clk.c        |   9 ---
 3 files changed, 88 insertions(+), 97 deletions(-)

I found that I needed this in order to keep graphics from failing:

-       GATE(ACLK_VIO1_NIU, "aclk_vio1_niu", "aclk_vio1", 0,
RK3288_CLKGATE_CON(15), 12, GFLAGS),
+       GATE(ACLK_VIO1_NIU, "aclk_vio1_niu", "aclk_vio1",
CLK_IGNORE_UNUSED, RK3288_CLKGATE_CON(15), 12, GFLAGS),

Off-list Heiko suggested that maybe VIO0_NIU would be similar.

Should maybe add that as IGNORE for now until we have something
claiming that clock?

-Doug