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Message-ID: <CAD=FV=VAqvmwGNwN6RNTg2rYk1UJ6k-4KKaD7ERJDXmqzCFKNQ@mail.gmail.com>
Date: Fri, 31 Oct 2014 15:59:58 -0700
From: Doug Anderson <dianders@...omium.org>
To: Kever Yang <kever.yang@...k-chips.com>
Cc: Mike Turquette <mturquette@...aro.org>,
Heiko Stuebner <heiko@...ech.de>,
Sonny Rao <sonnyrao@...omium.org>,
Addy Ke <addy.ke@...k-chips.com>,
Eddie Cai <cf@...k-chips.com>, Jianqun Xu <xjq@...k-chips.com>,
han jiang <hj@...k-chips.com>,
戴克霖 (Jack) <dkl@...k-chips.com>,
Tao Huang <huangtao@...k-chips.com>,
"open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] clk: rockchip: disable unused clocks
Kever,
On Thu, Oct 30, 2014 at 10:10 PM, Kever Yang <kever.yang@...k-chips.com> 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 <kever.yang@...k-chips.com>
> ---
>
> 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
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