From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751476AbdFFKwC (ORCPT ); Tue, 6 Jun 2017 06:52:02 -0400 Received: from mail-bl2nam02on0087.outbound.protection.outlook.com ([104.47.38.87]:49664 "EHLO NAM02-BL2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751345AbdFFKwA (ORCPT ); Tue, 6 Jun 2017 06:52:00 -0400 Authentication-Results: spf=fail (sender IP is 192.88.158.2) smtp.mailfrom=nxp.com; pengutronix.de; dkim=none (message not signed) header.d=none;pengutronix.de; dmarc=fail action=none header.from=nxp.com; Message-ID: <1496746313.28352.19.camel@nxp.com> Subject: Re: [PATCH] ARM: imx6ull: Make suspend/resume work like on 6ul From: Leonard Crestez To: Shawn Guo , Anson Huang CC: Peter Chen , , "Fabio Estevam" , , Lucas Stach Date: Tue, 6 Jun 2017 13:51:53 +0300 In-Reply-To: <20170605053722.GI4094@dragon> References: <20170605053722.GI4094@dragon> 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1;BLUPR03MB165;7:GJ72H9oHteQhp24i2+Wz2eAOgUUrc6FxJG6IUgGRFV3YUJbyHqrCxyybmRzKwO+qP4P6U2xUPUCMuqMLsaQTdc/Xoh2Uk/6BauRQfO5tifBt1j8htEP1fDD38WZAVb1P68/Q/GfSMCbtNn7GJWthWhvYoffvg+riw9umTcoVQIGn9t5nqsgu2a3Z0+HP4waMv3Z7qAFPxJC6fB0ZpoGnsP+xeqNLM/YhnNZS0O/NG+Q4T741pwDfIz7T8np3ylVV70MtSN3sXR+/nH/QkVu6Uy5GZj+iudSJyewCNPnSRXYML/twWmMrHayQG3RdbW9APglTmFMuvzcJaSHBBn0tKA== X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Jun 2017 10:51:56.9205 (UTC) X-MS-Exchange-CrossTenant-Id: 5afe0b00-7697-4969-b663-5eab37d5f47e X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=5afe0b00-7697-4969-b663-5eab37d5f47e;Ip=[192.88.158.2];Helo=[az84smr01.freescale.net] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BLUPR03MB165 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2017-06-05 at 13:37 +0800, Shawn Guo wrote: > On Tue, May 30, 2017 at 07:11:19PM +0300, Leonard Crestez wrote: > > > > Suspend and resume on imx6ull is currenty not working because of some > > missed checks where behavior should match imx6ul. > > > > Signed-off-by: Leonard Crestez > > --- > >  arch/arm/mach-imx/mxc.h     | 6 ++++++ > >  arch/arm/mach-imx/pm-imx6.c | 6 ++++-- > >  2 files changed, 10 insertions(+), 2 deletions(-) > > > > diff --git a/arch/arm/mach-imx/mxc.h b/arch/arm/mach-imx/mxc.h > > index 34f2ff6..e00d626 100644 > > --- a/arch/arm/mach-imx/mxc.h > > +++ b/arch/arm/mach-imx/mxc.h > > @@ -39,6 +39,7 @@ > >  #define MXC_CPU_IMX6SX 0x62 > >  #define MXC_CPU_IMX6Q 0x63 > >  #define MXC_CPU_IMX6UL 0x64 > > +#define MXC_CPU_IMX6ULL 0x65 > Since you are adding a new CPU type, you should probably patch > imx_soc_device_init() for it as well. Ok, I will resend as a 2-patch series. BTW, it actually seems to me that setting BM_CLPCR_BYP_MMDC_CH0_LPM_HS on imx6sl/sx/ul/ull is not actually needed. That bit (19) is documented as "reserved" in the Reference Manual and likely ignored by hardware. As far as I understand the MMDC on imx6qdl has two channels and unless 2-channel mode is enabled (not currently supported) the handshake with CH1 needs to be disabled. Other reduced chips only have one MMDC channel and that is CH1 (CH0 was removed) and nothing needs to be done from them. The only important thing is to avoid setting BM_CLPCR_BYP_MMDC_CH1_LPM_HS. However perhaps what I am saying is wrong for some early chip versions? Because this behavior of setting BM_CLPCR_BYP_MMDC_CH0_LPM_HS has been in the kernel for a long time. -- Regards, Leonard