On Thu, Dec 05, 2019 at 06:48:49PM -0800, Sowjanya Komatineni wrote:
> mclk is from clk_out_1 which is part of Tegra PMC block and pmc clocks
> are moved to Tegra PMC driver with pmc as clock provider and using pmc
> clock ids.
> 
> New device tree uses clk_out_1 from pmc clock provider.
> 
> So, this patch adds fallback to extern1 in case of retrieving mclk fails
> to be backward compatible of new device tree with older kernels.
> 
> Cc: stable@vger.kernel.org

Why would this need to be a stable fix?  Presumably people with stable
kernels are using the old device tree anyway?