From mboxrd@z Thu Jan 1 00:00:00 1970 From: yingjoe.chen@mediatek.com (Yingjoe Chen) Date: Tue, 10 Mar 2015 14:27:04 +0800 Subject: [PATCH 1/5] soc: mediatek: Add SMI driver In-Reply-To: <2583132.xxsZocsQta@wuerfel> References: <1425638900-24989-1-git-send-email-yong.wu@mediatek.com> <1425638900-24989-2-git-send-email-yong.wu@mediatek.com> <1425871612.4871.10.camel@mtksdaap41> <2583132.xxsZocsQta@wuerfel> Message-ID: <1425968824.4871.146.camel@mtksdaap41> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, 2015-03-09 at 22:56 +0100, Arnd Bergmann wrote: > On Monday 09 March 2015 11:26:52 Yingjoe Chen wrote: > > On Fri, 2015-03-06 at 18:48 +0800, yong.wu at mediatek.com wrote: > > > From: Yong Wu > > > > > > This patch add SMI(Smart Multimedia Interface) driver. This driver is > > > responsible to enable/disable iommu and control the clocks of each > > > local arbiter. > > > > > > Signed-off-by: Yong Wu > > > --- > > > drivers/soc/mediatek/Kconfig | 7 ++ > > > drivers/soc/mediatek/Makefile | 1 + > > > drivers/soc/mediatek/mt8173-smi.c | 143 ++++++++++++++++++++++++++++++++++++++ > > > include/linux/mtk-smi.h | 40 +++++++++++ > > > 4 files changed, 191 insertions(+) > > > create mode 100644 drivers/soc/mediatek/mt8173-smi.c > > > create mode 100644 include/linux/mtk-smi.h > > > > > > > Hi Arnd, Matthias, > > > > For the SMI driver, we can't find a better place, so we put it in > > drivers/soc/mediatek now. Please let us know if you have any suggestion > > or concern. Thanks > > From what I understand from your description, I think it would better > fit in drivers/iommu. Another option is drivers/memory, which I think > is where the respective Tegra driver ended up. Hi Arnd, The description above only describe what is implemented now. Besides that, SMI HW also does: - Prioritize/arbitrate memory requests between different ports & larbs. - Bandwidth limiter - Performance monitor I think drivers/memory make more sense. I can't find info about drivers/memory in MAINTAINERS. Can this go through ARM SoC tree if we put SMI driver there? Joe.C