From mboxrd@z Thu Jan 1 00:00:00 1970 From: wsa@the-dreams.de (Wolfram Sang) Date: Fri, 11 Sep 2015 20:53:12 +0200 Subject: [PATCH-v5 RESEND 2/5] i2c: pxa: enable/disable i2c module across msg xfer In-Reply-To: <1440395978-9065-3-git-send-email-vaibhav.hiremath@linaro.org> References: <1440395978-9065-1-git-send-email-vaibhav.hiremath@linaro.org> <1440395978-9065-3-git-send-email-vaibhav.hiremath@linaro.org> Message-ID: <20150911185312.GA1516@katana> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, Aug 24, 2015 at 11:29:35AM +0530, Vaibhav Hiremath wrote: > From: Yi Zhang > > Enable i2c module/unit before transmission and disable when it > finishes. > > why? > It's because the i2c bus may be disturbed if the slave device, > typically a touch, powers on. I am not convinced, "may disturb" is too weak for me. It would need a way more detailed description of the problem which makes clear that this mechanism is the only way to go forward. Can't you use Runtime PM for that? -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: Digital signature URL: