From mboxrd@z Thu Jan 1 00:00:00 1970 From: Khiem Nguyen Date: Wed, 14 Oct 2015 12:11:12 +0000 Subject: Re: [PATCH] ARM: shmobile: defconfig: enable HDMI output for RCar Message-Id: <561E4660.5020106@rvc.renesas.com> List-Id: References: <1407974835-11064-1-git-send-email-khilman@linaro.org> In-Reply-To: <1407974835-11064-1-git-send-email-khilman@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-sh@vger.kernel.org On 10/14/2015 3:22 PM, Geert Uytterhoeven wrote: > Hi Magnus, > > On Wed, Oct 14, 2015 at 10:09 AM, Magnus Damm wrote: >>> Or do you mean disabling them upfront? >>> There are some clocks that must not be disabled. Some of them are not >>> documented. >> >> Disabling them upfront with sparse documentation seems fun, but also a >> bit like asking for trouble. =) > > I have hackish code that does it for all boards I have, and use it actively. > >> So disabling clocks upfront may be a troublesome but good way to >> trigger incorrect dependencies, and unless I'm mistaken it should give >> the same behaviour as the updated u-boot version, right? > > More or less (U-Boot still keeps a few enabled for its own use, e.g. Ethernet). AFAIK, in some recent versions of Gen2 BSP, all the devices (including all devices enabled by u-boot for its processing, like Ethernet, TMU, serial) will be turned off right before jumping to kernel start address. > Gr{oetje,eeting}s, > > Geert > > -- > Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org > > In personal conversations with technical people, I call myself a hacker. But > when I'm talking to journalists I just say "programmer" or something like that. > -- Linus Torvalds > -- > To unsubscribe from this list: send the line "unsubscribe linux-sh" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >