On 05/11/2020 00:43, Nishanth Menon wrote: > The device tree standard sets the default node behavior when status > property as enabled. There are many reasons for doing the same, number > of strings in device tree, default power management functionality etc > are few of the reasons. > > In general, after a few rounds of discussions [1] there are few > options one could take when dealing with SoC dtsi and board dts > > a. SoC dtsi provide nodes as a super-set default (aka enabled) state and > to prevent messy board files, when more boards are added per SoC, we > optimize and disable commonly un-used nodes in board-common.dtsi > b. SoC dtsi disables all hardware dependent nodes by default and board > dts files enable nodes based on a need basis. > c. Subjectively pick and choose which nodes we will disable by default > in SoC dtsi and over the years we can optimize things and change > default state depending on the need. > > While there are pros and cons on each of these approaches, the right > thing to do will be to stick with device tree default standards and > work within those established rules. So, we choose to go with option > (a). > > Lets cleanup defaults of j721e SoC dtsi before this gets more harder > to cleanup later on and new SoCs are added. > > The only functional difference between the dtb generated is > status='okay' is no longer necessary for mcasp10 and depends on the > default state. > > [1] https://lore.kernel.org/linux-arm-kernel/20201027130701.GE5639@xxxxxxxxxxx/ > > Fixes: 1c4d35265fb2 ("arm64: dts: ti: k3-j721e-main: Add McASP nodes") > Fixes: 76921f15acc0 ("arm64: dts: ti: k3-j721e-main: Add DSS node") > Cc: Jyri Sarha <jsarha@xxxxxx> > Cc: Tomi Valkeinen <tomi.valkeinen@xxxxxx> > Cc: Peter Ujfalusi <peter.ujfalusi@xxxxxx> > Cc: Tony Lindgren <tony@xxxxxxxxxxx> > Signed-off-by: Nishanth Menon <nm@xxxxxx> > --- > .../dts/ti/k3-j721e-common-proc-board.dts | 48 ++++++++++++++++++- > arch/arm64/boot/dts/ti/k3-j721e-main.dtsi | 26 ---------- > 2 files changed, 47 insertions(+), 27 deletions(-) Reviewed-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx> Tomi -- Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
