38e42f1216
Documentation: DT bindings: Tegra AHB: require the legacy base address for existing chips Per Stephen Warren, note in the Tegra AHB DT binding documentation that we specifically deprecate any attempt to use the IP block's actual hardware base address, and advocate the use of the legacy "off-by-four" address in the 'regs' property, for Tegra chips with existing upstream Linux DT files that include a Tegra AHB node. This patch updates the documentation accordingly. Changing the existing kernel DT data isn't under consideration because Linux kernel DT data policy is to preserve compatibility between newer DT data files and older kernels. However, this additional step of changing the documentation should discourage others from sending kernel patches to try to change the legacy kernel DT data. Furthermore, for out-of-tree software (such as bootloaders or other operating systems) that may rely on Linux kernel DT binding documentation as an ABI (but not the Linux kernel DT data itself), such a change may allow future convergence with the Linux kernel DT data without additional code changes. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Paul Walmsley <pwalmsley@nvidia.com> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Eduardo Valentin <edubezval@gmail.com> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> Cc: Kumar Gala <galak@codeaurora.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> |
||
|---|---|---|
| .. | ||
| nvidia,tegra20-ahb.txt | ||
| nvidia,tegra20-emc.txt | ||
| nvidia,tegra20-flowctrl.txt | ||
| nvidia,tegra20-mc.txt | ||
| nvidia,tegra20-pmc.txt | ||
| nvidia,tegra30-mc.txt | ||