From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Vasut Date: Mon, 8 Apr 2013 08:25:01 +0200 Subject: [U-Boot] [PATCH 7/8] mtd: nand: add driver for diskonchip g4 nand flash In-Reply-To: <1365352865-2137-8-git-send-email-mikedunn@newsguy.com> References: <1365352865-2137-1-git-send-email-mikedunn@newsguy.com> <1365352865-2137-8-git-send-email-mikedunn@newsguy.com> Message-ID: <201304080825.01859.marex@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Dear Mike Dunn, > This patch adds a driver for the diskonchip G4 nand flash device. It is > based on the driver from the linux kernel. > > This also includes a separate SPL driver. A separate SPL driver is used > because the device operates in a different mode (reliable mode) when > loading a boot image, and also because the storage format of the boot > image is different from normal data (pages are stored redundantly). The > SPL driver basically mimics how a typical IPL reads data from the device. > The special operating mode and storage format are used to compensate for > the fact that the IPL does not contain the BCH ecc decoding algorithm (due > to size constraints). Although the u-boot SPL *could* use ecc, it > operates like an IPL for the sake of simplicity and uniformity, since the > IPL and SPL share the task of loading the u-boot image. As a side benefit, > the SPL driver is very small. > > Signed-off-by: Mike Dunn Try #ifdef U_BOOT instead of #if 0, no? Best regards, Marek Vasut