From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Vasut Subject: Re: [PATCH V4 RFC 2/3] nvmem: add driver for ocotp in i.MX23 and i.MX28 Date: Mon, 20 Jul 2015 00:12:13 +0200 Message-ID: <201507200012.13608.marex@denx.de> References: <1437343499-16422-1-git-send-email-stefan.wahren@i2se.com> <1437343499-16422-3-git-send-email-stefan.wahren@i2se.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1437343499-16422-3-git-send-email-stefan.wahren-eS4NqCHxEME@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Stefan Wahren Cc: Srinivas Kandagatla , Maxime Ripard , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Shawn Guo , Sascha Hauer , Fabio Estevam , Sanchayan Maity , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org On Monday, July 20, 2015 at 12:04:58 AM, Stefan Wahren wrote: > This patch brings read-only support for the On-Chip OTP cells > in the i.MX23 and i.MX28 processor. The driver implements the > new NVMEM provider API. > > Signed-off-by: Stefan Wahren How come this driver isn't doing any manipulation with the VDDIO voltage -- or did I miss that? I seem to remember that the VDDIO had to be lowered to 2.8V before the fuses could be programmed and restored to 3.3V afterward. See for example recent mainline u-boot, drivers/misc/mxs_ocotp.c . Best regards, Marek Vasut -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html