From: rogerq@ti.com (Roger Quadros) Date: Thu, 30 Oct 2014 14:26:18 +0200 Subject: [PATCH 05/10] ARM: OMAP2+: Fix support for multiple devices on a GPMC chip select In-Reply-To: <1414628948-30702-6-git-send-email-tony@atomide.com> References: <1414628948-30702-1-git-send-email-tony@atomide.com> <1414628948-30702-6-git-send-email-tony@atomide.com> Message-ID: <54522E6A.6060502@ti.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 10/30/2014 02:29 AM, Tony Lindgren wrote: > There are cases where we have multiple device instances > connected to a single GPMC chip select. For example, there > are four UARTs on the Zoom debug boards that all share a > single chip select and a GPIO interrupt. > > We do have support for this already in theory, but it's broken > because we're bailing out if the chip select is already taken. > > To be able to provide checks on the chip select usage, let's > add new struct gpmc_cs_data so we can start using already > registered device names for checks. > > Later on we probably want to start using struct gpmc_cs_data > as a wrapper for all the GPMC chipselect related data. > > Cc: Roger Quadros > Signed-off-by: Tony Lindgren Acked-by: Roger Quadros cheers, -roger