Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933182AbeAKVeR (ORCPT + 1 other); Thu, 11 Jan 2018 16:34:17 -0500 Received: from mail-ua0-f193.google.com ([209.85.217.193]:46165 "EHLO mail-ua0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932290AbeAKVeP (ORCPT ); Thu, 11 Jan 2018 16:34:15 -0500 X-Google-Smtp-Source: ACJfBovmRKaFQTjaMoZv6XWXR8euc3bOpRVDoaj+FLr+4WDcZ2vKBuZLmC3Mmc2gQ5b7jnzvBeElfW597fQAUpnGFEo= MIME-Version: 1.0 In-Reply-To: <5832fd62-16aa-e167-7e52-2ce493e33cdc@lechnology.com> References: <1515377863-20358-1-git-send-email-david@lechnology.com> <1515377863-20358-2-git-send-email-david@lechnology.com> <22409e49-5c14-4068-b137-7535afaf90d7@lechnology.com> <0f90b5f7-f21e-5f81-1154-9a815bbb786d@ti.com> <5aacc350-6236-2e4f-35bb-a681fc9d47e7@ti.com> <40501635-6f5b-20c9-f8bc-d17e26b58426@lechnology.com> <5832fd62-16aa-e167-7e52-2ce493e33cdc@lechnology.com> From: Adam Ford Date: Thu, 11 Jan 2018 15:34:12 -0600 Message-ID: Subject: Re: [PATCH v5 01/44] dt-bindings: clock: Add new bindings for TI Davinci PLL clocks To: David Lechner Cc: Sekhar Nori , linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Michael Turquette , Stephen Boyd , Rob Herring , Mark Rutland , Kevin Hilman , linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: On Thu, Jan 11, 2018 at 3:04 PM, David Lechner wrote: > On 01/11/2018 02:58 PM, Adam Ford wrote: >> >> On Thu, Jan 11, 2018 at 2:04 PM, David Lechner >> wrote: >>> >>> On 01/11/2018 12:50 PM, Adam Ford wrote: >>>> >>>> >>>> On Thu, Jan 11, 2018 at 12:29 PM, David Lechner >>>> wrote: >>>>> >>>>> >>>>> If removing the "clk_ignore_unused" option causes the board to not >>>>> boot, >>>>> then we still have problems that need to be fixed, so please also test >>>>> without this option. >>>> >>>> >>>> >>>> Without this option, it still does not boot. Without device tree it >>>> hangs after: >>>> >>>> [snip] >>>> >>>> NET: Registered protocol family 17 >>>> Loading compiled-in X.509 certificates >>>> console [netcon0] enabled >>>> netconsole: network logging started >>>> davinci_emac davinci_emac.1: using random MAC addr: 5e:38:1a:1f:4f:77 >>>> mmc0: host does not support reading read-only switch, assuming >>>> write-enable >>>> hctosys: unable to open rtc device (rtc0) >>>> mmc0: new high speed SDHC card at address b368 >>>> >>>> >>>> With device tree it hangs after: >>>> >>>> [snip] >>>> mmc0: host does not support reading read-only switch, assuming >>>> write-enable >>>> mmc0: new high speed SDHC card at address b368 >>>> mmcblk0: mmc0:b368 00000 3.75 GiB >>>> mmcblk0: p1 p2 >>>> pca953x 0-0020: 0-0020 supply vcc not found, using dummy regulator >>>> pca953x 0-0020: failed reading register >>>> pca953x: probe of 0-0020 failed with error -121 >>>> console [netcon0] enabled >>>> netconsole: network logging started >>>> davinci_emac 1e20000.ethernet: incompatible machine/device type for >>>> reading mac address >>>> hctosys: unable to open rtc device (rtc0) >>>> >>>> >>> >>> Please try this change: >>> >>> diff --git a/drivers/clk/davinci/psc-da850.c >>> b/drivers/clk/davinci/psc-da850.c >>> index 3fd6b49..a526cc2 100644 >>> --- a/drivers/clk/davinci/psc-da850.c >>> +++ b/drivers/clk/davinci/psc-da850.c >>> @@ -17,7 +17,7 @@ static const struct davinci_psc_clk_info >>> da850_psc0_info[] >>> __initconst = { >>> LPSC(0, 0, tpcc0, pll0_sysclk2, LPSC_ALWAYS_ENABLED), >>> LPSC(1, 0, tptc0, pll0_sysclk2, LPSC_ALWAYS_ENABLED), >>> LPSC(2, 0, tptc1, pll0_sysclk2, LPSC_ALWAYS_ENABLED), >>> - LPSC(3, 0, aemif, pll0_sysclk3, 0), >>> + LPSC(3, 0, aemif, pll0_sysclk3, LPSC_ALWAYS_ENABLED), >>> LPSC(4, 0, spi0, pll0_sysclk2, 0), >>> LPSC(5, 0, mmcsd0, pll0_sysclk2, 0), >>> LPSC(6, 0, aintc, pll0_sysclk4, LPSC_ALWAYS_ENABLED), >>> >>> >>> >>> If that does not work, try adding LPSC_ALWAYS_ENABLED to all of the >>> clocks >>> in this file and then eliminate them one by one until you find which one >>> is >>> preventing boot. >>> >> Unfortunately, that didn't work. I switch all the entries in both >> tables that had a 0 to LPSC_ALWAYS_ENABLED, but no luck booting. >> >>> If it still does not boot, there is a similar DIVCLK_ALWAYS_ENABLED flag >>> in >>> drivers/clk/davinci/pll-da850.c that you can repeat the exercise with. >>> Add >>> DIVCLK_ALWAYS_ENABLED to all of the clocks there and then eliminate it >>> one >>> by one until you find the clock that is causing the problem. >> >> >> Still no good news. I switched all the entries with a 0 to >> DIVCLK_ALWAYS_ENABLED and it still didn't finish booting. >> >> I wonder if Sekhar Nori might have some suggestions. I didn't look at >> the code or try to understand it. I just changed the settings. >>> >>> > > Even if a clock had another flag besides zero, you will need to add > LPSC_ALWAYS_ENABLED by or-ing it with the other flag. > [snip] Thanks for clarifying. I was able to make it work with the following patch: diff --git a/drivers/clk/davinci/psc-da850.c b/drivers/clk/davinci/psc-da850.c index 3b4583d..a76b8682 100644 --- a/drivers/clk/davinci/psc-da850.c +++ b/drivers/clk/davinci/psc-da850.c @@ -25,7 +25,7 @@ static const struct davinci_psc_clk_info da850_psc0_info[] __initconst = { LPSC(9, 0, uart0, pll0_sysclk2, 0), LPSC(13, 0, pruss, pll0_sysclk2, 0), LPSC(14, 0, arm, pll0_sysclk6, LPSC_ALWAYS_ENABLED), - LPSC(15, 1, dsp, pll0_sysclk1, LPSC_FORCE | LPSC_LOCAL_RESET), + LPSC(15, 1, dsp, pll0_sysclk1, LPSC_FORCE | LPSC_LOCAL_RESET | LPSC_ALWAYS_ENABLED), { } }; If you have an updated patch series with those two fixes, I add my name to the tested-by list. > > [snip] >