From mboxrd@z Thu Jan 1 00:00:00 1970 From: broonie@kernel.org (Mark Brown) Date: Fri, 17 Jun 2016 11:47:25 +0100 Subject: [PATCH 1/5] spi: do not fail if the CS line is not connected In-Reply-To: <1466150245-2648-2-git-send-email-andi.shyti@samsung.com> References: <1466150245-2648-1-git-send-email-andi.shyti@samsung.com> <1466150245-2648-2-git-send-email-andi.shyti@samsung.com> Message-ID: <20160617104725.GC26099@sirena.org.uk> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Fri, Jun 17, 2016 at 04:57:21PM +0900, Andi Shyti wrote: > Some SPI connected devices do not have any CS line connected as > some devices are alway enabled. Indeed, until now, a common > workaround was to assign to num_chipselect a -1 value or 255 > (num_chipselect is unsigned). > > In this case do not fail and defer to the SPI device drivers the > responsibility to check whether the num-cs is '0'. A SPI controller always has one chip seelct, it may not be controllable but it's at least logically present. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 473 bytes Desc: not available URL: