> -----Original Message----- > From: Rob Herring [mailto:robh@xxxxxxxxxx] > Sent: 12 February 2016 20:35 > To: Raveendra Padasalagi > Cc: Dmitry Torokhov; Arnd Bergmann; Russell King; devicetree@xxxxxxxxxxxxxxx; > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linux-input@xxxxxxxxxxxxxxx; Pawel Moll; > Mark Rutland; Ian Campbell; Kumar Gala; Jonathan Richardson; Jon Mason; > Florian Fainelli; Ray Jui; Scott Branden; linux-kernel@xxxxxxxxxxxxxxx; bcm- > kernel-feedback-list@xxxxxxxxxxxx > Subject: Re: [PATCH 1/3] input: cygnus-update touchscreen dt node document > > Your mailer is not handling wrapping correctly. Generally, Outlook does not > work for maillists. > > On Wed, Feb 10, 2016 at 10:24:43AM +0530, Raveendra Padasalagi wrote: > > > -----Original Message----- > > > From: Dmitry Torokhov [mailto:dmitry.torokhov@xxxxxxxxx] > > > Sent: 09 February 2016 23:14 > > > To: Raveendra Padasalagi > > > Cc: Arnd Bergmann; Russell King; devicetree@xxxxxxxxxxxxxxx; > > > linux-arm- kernel@xxxxxxxxxxxxxxxxxxx; linux-input@xxxxxxxxxxxxxxx; > > > Rob Herring; > > Pawel > > > Moll; Mark Rutland; Ian Campbell; Kumar Gala; Jonathan Richardson; > > > Jon Mason; Florian Fainelli; Ray Jui; Scott Branden; > > linux-kernel@xxxxxxxxxxxxxxx; > > > bcm-kernel-feedback-list@xxxxxxxxxxxx > > > Subject: Re: [PATCH 1/3] input: cygnus-update touchscreen dt node > > document > > And Outlook's reply header is non-standard. > > [...] > > > > > In Cygnus SOC, Touch screen controller registers are shared with > > > > ADC and flex timer IP's. > > > > Using readl/writel could lead to race condition. So this patch is > > > > introduced to take care mutually exclusive access of register's in > > > > such a case. > > > > > > > > In the platform's where touchscreen register's are not shared > > > > normal readl/writel could be used. > > > > > > Are there currently platforms where the registers are not shared? If > > > we > > have to > > > use regmap to correctly update registers (and thus we need > > > syscon) then I wonder if we should even attempt to support direct > > register > > > access by the driver. > > > > Currently there are no platforms without register sharing, but we > > would like to keep the driver generic enough to take care of future > > SOC's if comes with dedicated registers and same touchscreen IP being > > re-used. > > These future SoCs will have a different compatible string and you should use that > to determine whether reg or syscon is used. Thanks Rob. I will address this in the next patch. > Rob -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
