From mboxrd@z Thu Jan 1 00:00:00 1970 From: s.hauer@pengutronix.de (Sascha Hauer) Date: Fri, 26 Sep 2014 07:32:55 +0200 Subject: [PATCH v2 4/4] ARM: dts: mt8135: Add pinctrl node for mt8135. In-Reply-To: <20140924124044.GC4992@pengutronix.de> References: <1411443545-24951-1-git-send-email-srv_hongzhou.yang@mediatek.com> <1411443545-24951-5-git-send-email-srv_hongzhou.yang@mediatek.com> <20140924124044.GC4992@pengutronix.de> Message-ID: <20140926053255.GL4992@pengutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Linus, On Wed, Sep 24, 2014 at 02:40:44PM +0200, Sascha Hauer wrote: > > I haven't got to reviewing the driver, but this looks just wrong. > > > > Have the magic numbers in the driver. > > > > Use strings to describe functions, not integers. > > Interrupts, clocks, gpios, dma channels, nearly everything in the device tree is > arbitrarily numbered. Instead of "irq-i2c0" we have <0 36 IRQ_TYPE_LEVEL_HIGH> > in the device tree. These numbers can be resolved efficiently in the > driver by shifting them to get a bitmask or by adding them as offset to > a register base. > Why do you want to make pinctrl different? Thanks to the recently > introduced defines in the device trees these numbers are not magic at > all anymore. Any opinions on this? Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |