Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753787AbaKMCwO (ORCPT ); Wed, 12 Nov 2014 21:52:14 -0500 Received: from regular1.263xmail.com ([211.150.99.130]:53579 "EHLO regular1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753598AbaKMCwN (ORCPT ); Wed, 12 Nov 2014 21:52:13 -0500 X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-RL-SENDER: kever.yang@rock-chips.com X-FST-TO: linux-kernel@vger.kernel.org X-SENDER-IP: 127.0.0.1 X-LOGIN-NAME: kever.yang@rock-chips.com X-UNIQUE-TAG: X-ATTACHMENT-NUM: 0 X-DNS-TYPE: 0 Message-ID: <54641CD4.9070901@rock-chips.com> Date: Thu, 13 Nov 2014 10:52:04 +0800 From: Kever Yang User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.0 MIME-Version: 1.0 To: Dmitry Torokhov , Heiko Stuebner , Mike Turquette CC: Doug Anderson , Jianqun , Mark yao , linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] clk: rockchip: ensure HCLK_VIO2_H2P and PCLK_VIO2_H2P stay enabled References: <20141112213845.GA14153@dtor-ws> In-Reply-To: <20141112213845.GA14153@dtor-ws> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Dmitry, On 11/13/2014 05:38 AM, Dmitry Torokhov wrote: > Currently there is no driver owning these clocks and they have to stay > up for the system to function properly, so let's mark them as > CLK_IGNORE_UNUSED. > > Without this patch we have trouble with suspend/resume and we have > trouble turning the eDP back on if it ever idles off. > > Signed-off-by: Doug Anderson > Signed-off-by: Dmitry Torokhov > --- > drivers/clk/rockchip/clk-rk3288.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/clk/rockchip/clk-rk3288.c b/drivers/clk/rockchip/clk-rk3288.c > index 2327829..d79d52f 100644 > --- a/drivers/clk/rockchip/clk-rk3288.c > +++ b/drivers/clk/rockchip/clk-rk3288.c > @@ -724,14 +724,14 @@ static struct rockchip_clk_branch rk3288_clk_branches[] __initdata = { > GATE(HCLK_VIP, "hclk_vip", "hclk_vio", 0, RK3288_CLKGATE_CON(15), 15, GFLAGS), > GATE(HCLK_IEP, "hclk_iep", "hclk_vio", 0, RK3288_CLKGATE_CON(15), 3, GFLAGS), > GATE(HCLK_ISP, "hclk_isp", "hclk_vio", 0, RK3288_CLKGATE_CON(16), 1, GFLAGS), > - GATE(HCLK_VIO2_H2P, "hclk_vio2_h2p", "hclk_vio", 0, RK3288_CLKGATE_CON(16), 10, GFLAGS), > + GATE(HCLK_VIO2_H2P, "hclk_vio2_h2p", "hclk_vio", CLK_IGNORE_UNUSED, RK3288_CLKGATE_CON(16), 10, GFLAGS), > GATE(PCLK_MIPI_DSI0, "pclk_mipi_dsi0", "hclk_vio", 0, RK3288_CLKGATE_CON(16), 4, GFLAGS), > GATE(PCLK_MIPI_DSI1, "pclk_mipi_dsi1", "hclk_vio", 0, RK3288_CLKGATE_CON(16), 5, GFLAGS), > GATE(PCLK_MIPI_CSI, "pclk_mipi_csi", "hclk_vio", 0, RK3288_CLKGATE_CON(16), 6, GFLAGS), > GATE(PCLK_LVDS_PHY, "pclk_lvds_phy", "hclk_vio", 0, RK3288_CLKGATE_CON(16), 7, GFLAGS), > GATE(PCLK_EDP_CTRL, "pclk_edp_ctrl", "hclk_vio", 0, RK3288_CLKGATE_CON(16), 8, GFLAGS), > GATE(PCLK_HDMI_CTRL, "pclk_hdmi_ctrl", "hclk_vio", 0, RK3288_CLKGATE_CON(16), 9, GFLAGS), > - GATE(PCLK_VIO2_H2P, "pclk_vio2_h2p", "hclk_vio", 0, RK3288_CLKGATE_CON(16), 11, GFLAGS), > + GATE(PCLK_VIO2_H2P, "pclk_vio2_h2p", "hclk_vio", CLK_IGNORE_UNUSED, RK3288_CLKGATE_CON(16), 11, GFLAGS), > > /* aclk_vio0 gates */ > GATE(ACLK_VOP0, "aclk_vop0", "aclk_vio0", 0, RK3288_CLKGATE_CON(15), 5, GFLAGS), The H/PCLK_VIO2_H2P is some kind of bus clock for a ahb2apb bridge inside the VIO, it should be on when some of VIO logic is working, but it is not easy to assign these two clocks to module driver. I think it is reasonable to mark with CLK_IGNORE_UNUSED tag so far. Reviewed-by: Kever Yang -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/