From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laurent Pinchart Date: Thu, 25 Apr 2013 10:19:31 +0000 Subject: Re: [PATCH 0/4] sh73a0: Expose the PFC-controller SDHI power gate as a regulator Message-Id: <2383729.NyfcNBAiP0@avalon> List-Id: References: <1366672585-9098-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com> In-Reply-To: <1366672585-9098-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-sh@vger.kernel.org Hi Simon, On Thursday 25 April 2013 09:23:57 Simon Horman wrote: > On Wed, Apr 24, 2013 at 04:40:22PM +0900, Simon Horman wrote: > > On Tue, Apr 23, 2013 at 01:16:21AM +0200, Laurent Pinchart wrote: > > > Hello, > > > > > > The sh73a0 has an internal power gate on the VCCQ power supply for the > > > SDHI0 device that is controlled (for some strange reason) by a bit in a > > > PFC register. > > > > > > This patch set exposes the power gate as a regulator. As the only > > > currently supported board (kzm9g) has the VCCQ_MC0 pins directly > > > connected to an always on 3.3V supply, the code assumes that the > > > external VCCQ power supply can't be controlled. This could be fixed > > > later by setting the regulator supply name. > > > > > > As this series turns the power off when not needed it might bring > > > additional power saving, but this hasn't been measured. If the patches > > > are considered too complex a simpler approach would be to turn the > > > power gate on when the SDHI function is selected. > > > > > > The patches are based on tags/renesas-next-20130422. They have been > > > tested on kzm9g. > > > > > > Laurent Pinchart (4): > > > sh-pfc: Add support for SoC-specific initialization > > > sh-pfc: sh73a0: Add VCCQ MC0 regulator > > > ARM: shmobile: kzm9g: Remove the VCCQ MC0 function GPIO > > > ARM: shmobile: kzm9g-reference: Remove the VCCQ MC0 function GPIO > > > > > > arch/arm/mach-shmobile/board-kzm9g-reference.c | 1 - > > > arch/arm/mach-shmobile/board-kzm9g.c | 3 - > > > drivers/pinctrl/sh-pfc/Kconfig | 1 + > > > drivers/pinctrl/sh-pfc/core.c | 16 ++- > > > drivers/pinctrl/sh-pfc/core.h | 1 + > > > drivers/pinctrl/sh-pfc/pfc-sh73a0.c | 134 ++++++++++++++++++ > > > drivers/pinctrl/sh-pfc/sh_pfc.h | 2 + > > > 7 files changed, 153 insertions(+), 5 deletions(-) > > > > I have rebased the pinmux branch on renesas-boards3-for-v3.10 to > > supply dependencies. That tag includes the renesas-pinmux2-for-v3.10 > > tag which the pinmux branch was previously based on. > > > > I have applied this entire series on the resulting pinmux branch. > > > > I plan to push this when I tag renesas-next-20130424 later today. > > If not I will tag and push renesas-next-20130425 tomorrow. > > As there was subsequently some discussion of this series > and a v2 posted I have dropped these changes for now. > Please ping me when you feel they are ready. Sure. I will wait for Mark Brown's ack first. -- Regards, Laurent Pinchart