Am Sonntag, 16. März 2014, 22:22:02 schrieb Heiko Stübner: > From: Heiko Stuebner <heiko.stuebner@xxxxxx> > > On i.MX, which carries a lot of pin-groups of which most are unused on > individual boards, they noticed that this plethora of nodes also results > in the runtime-lookup-performance also degrading [0]. > > A i.MX-specific solution defining the pingroups in the board files but > using macros to reference the pingroup-data was not well received. > > This patch is trying to solve this issue in a more general way, by > adding the ability to mark nodes as needing to be referenced somewhere > in the tree. > > To mark a node a needing to be referenced it must be prefixed with > /delete-unreferenced/. This makes dtc check the nodes reference-status > when creating the flattened tree, dropping it if unreferenced. > > For example, the i.MX6SL pingroup > > /delete-unreferenced/ pinctrl_ecspi1_1: ecspi1grp-1 { > fsl,pins = < > MX6SL_PAD_ECSPI1_MISO__ECSPI1_MISO 0x100b1 > MX6SL_PAD_ECSPI1_MOSI__ECSPI1_MOSI 0x100b1 > MX6SL_PAD_ECSPI1_SCLK__ECSPI1_SCLK 0x100b1 > > >; > > }; > > would only be included in the dtb if it got referenced somewhere > as pingroup via > > node { > pinctrl-0 <&pinctrl_ecscpi1_1>; > }; > > [0] http://thread.gmane.org/gmane.linux.ports.arm.kernel/275912/ > > Signed-off-by: Heiko Stuebner <heiko.stuebner@xxxxxx> ping? Is this ok, bad, something else entirely? :-) Thanks Heiko -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html