linux-kernel - Re: [PATCH] clk: rockchip: disable unused clocks

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Date:	Wed, 29 Oct 2014 21:21:24 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Kever Yang <kever.yang@...k-chips.com>
Cc:	Heiko Stübner <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>,
	Mike Turquette <mturquette@...aro.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] clk: rockchip: disable unused clocks

Kever,

On Wed, Oct 29, 2014 at 6:10 PM, Kever Yang <kever.yang@...k-chips.com> wrote:
>>> I'll also say that when I applied this atop my local tree that USB
>>> stopped working.  I just see:
>>>
>>> [ 1647.626747] hub 2-1:1.0: hub_port_status failed (err = -110)
>>> [ 1657.626746] hub 2-1:1.0: hub_port_status failed (err = -110)
>>>
>>> ...over and over and over again.
>>
>> maybe Kever's dwc2 clock-handling patch [0] might help there, as the
>> dwc2-host
>> currently does not seem to do any clock handling at all.
>
> I think Heiko is right, I test in my evb with following change and dwc2
> works well:
> --- a/drivers/clk/rockchip/clk-rk3288.c
> +++ b/drivers/clk/rockchip/clk-rk3288.c
> @@ -654,8 +654,8 @@ static struct rockchip_clk_branch rk3288_clk_branches[]
> __initdata = {
>
>         /* hclk_peri gates */
>         GATE(0, "hclk_peri_matrix", "hclk_peri", CLK_IGNORE_UNUSED,
> RK3288_CLKGATE_CON(6), 0, GFLAGS),
> -       GATE(HCLK_OTG0, "hclk_otg0", "hclk_peri", 0, RK3288_CLKGATE_CON(7),
> 4, GFLAGS),
> -       GATE(HCLK_USBHOST0, "hclk_host0", "hclk_peri", 0,
> RK3288_CLKGATE_CON(7), 6, GFLAGS),
> +       GATE(HCLK_OTG0, "hclk_otg0", "hclk_peri", CLK_IGNORE_UNUSED,
> RK3288_CLKGATE_CON(7), 4, GFLAGS),
> +       GATE(HCLK_USBHOST0, "hclk_host0", "hclk_peri", CLK_IGNORE_UNUSED,
> RK3288_CLKGATE_CON(7), 6, GFLAGS),
>         GATE(HCLK_USBHOST1, "hclk_host1", "hclk_peri", 0,
> RK3288_CLKGATE_CON(7), 7, GFLAGS),
>         GATE(HCLK_HSIC, "hclk_hsic", "hclk_peri", 0, RK3288_CLKGATE_CON(7),
> 8, GFLAGS),
>         GATE(0, "hclk_usb_peri", "hclk_peri", CLK_IGNORE_UNUSED,
> RK3288_CLKGATE_CON(7), 9, GFLAGS),

Yeah, that fixes it for me.  Since the USB patches are still RFC-level
I assume you'll add these to your next version.
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