From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tom Rini Date: Mon, 13 May 2013 08:21:20 -0400 Subject: [U-Boot] [PATCH 3/6] am335x_evm: Only set CONFIG_NAND when !CONFIG_SPI_BOOT In-Reply-To: <87sj1rvrd1.fsf@dell.be.48ers.dk> References: <1368053157-28317-1-git-send-email-trini@ti.com> <1368053157-28317-3-git-send-email-trini@ti.com> <87sj1rvrd1.fsf@dell.be.48ers.dk> Message-ID: <5190DAC0.8070901@ti.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 05/12/2013 05:08 PM, Peter Korsgaard wrote: >>>>>> "Tom" == Tom Rini writes: > > Tom> Due to hardware design, we can't have NAND present (as we know > of NAND Tom> today) when booting from SPI, so disable NAND then as > that simplifies Tom> logic. > > Sorry, this description is not clear to me. I didn't check in > detail, but as far as I remember the default pins for spi0 don't > conflict with gmpc. > > It's also not quite clear to me if you refer to SW support fo > NAND flash or the hardware component when you say 'NAND' above. OK, good point. I'm talking about HW support, and it should be spelled put better. Note that we're talking about the TI GP EVM, EVM SK, BeagleBone White and BeagleBone Black here, and not custom hardware. The EVM SK does not allow for expansion such as adding NAND/NOR flash and probably not SPI. The GP EVM can have only one of NOR, NAND or SPI flash active based on the profile that is selected for the whole hardware stack. The BeagleBone White may have a "memory cape" installed which in turn can have a NAND, NOR or eMMC board plugged into it. It's not impossible someone could come up with a SPI flash cape and plug the memory cape into that, or come up with a complex breadboard solution. But lets see that happen and work before worrying about that particular permutation. - -- Tom -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJRkNrAAAoJENk4IS6UOR1W2lEQALB95Qfrrc1iE0QkccAOPC+q ODZLj9UQd6emu/Fs+jQjyEhkiBr63EjTf7N1yy03ixz45NIsibgAzf8hTJ7pOEjG tbbqyHOUx7ATkApO5olhHqFYLtvUyhvAG3Tqg9adnXVWv0xggO3zXEw2e7x/yhPt TC2uDmnVZeQxAmSmJ6V0RxUmoZYegRL6HeQAO4xM20YekWZxj+JQ08Cuyk8/hmwI as5Fww713Qx2cDTkzGvut5wsd3ilGrIkkV9RIbooTP3gVX23ZUuyGfB/1E4DaRIn bOwofKDWefOPssbNWoNf7moHaDRgvr//H5mH6P7ItUpym0bJjD/TArIeriueojF2 pNoi0czRRuYnWbgVbbzJdpbsp+O7acm8dEmNUoULMqvdyhFH1ZC1QMRwrohK26wT 6AP/JrWZq5xWzxeCzMf2YWzgZNN7dJgiFvVzCGAFTO7RLehKFgkTtT18eYfr6Tlr NOueiIMJC01nwYv5iyIyyDRZsEERix2YIjt1K1B++X3r8lbhXUCuWac63mpeVryR QjB/K+jNTojhwk5i9e6GSxdJYlRA8Rcv8AprQyHXL8QC19iNwsKww/yqCfFW/nkR C75qRom6B/m5uxPyurdTwJnxjda1PNsB9HXZ6zuUUsHRy7rB+1XjGLRL7bhPheKN uaQcsJPkFJUfaVINpdyY =2mnd -----END PGP SIGNATURE-----