[PATCH] imx: dts: tbs2910: add u-boot dtsi to shrink image size

Tom Rini trini at konsulko.com
Fri Dec 6 19:43:05 CET 2019 

On Fri, Dec 06, 2019 at 07:30:47PM +0100, Anatolij Gustschin wrote:

> Use U-Boot specific board dtsi to remove some not used nodes and
> properties. With this change applied considerable size reduction
> has been observed:
> 
>   $ ./tools/buildman/buildman -b tbs2910 -f tbs2910 || \
>     ./tools/buildman/buildman -b tbs2910 -sS tbs2910
>   ...
>   Summary of 2 commits for 1 boards (1 thread, 12 jobs per thread)
>   01: Merge branch '2019-12-05-master-imports'
>          arm:  w+   tbs2910
>   02: imx: dts: tbs2910: add u-boot dtsi to shrink image size
>          arm: (for 1/1 boards) all -24448.0 text -24448.0
> 
> Signed-off-by: Anatolij Gustschin <agust at denx.de>
> ---
> This patch was only build-tested, maybe this removes to much
> and needs some tweaking. I'd appreciate if someone could test
> it on actual hardware and finish the work, so we hopefully
> can solve frequent CI build breakage caused by this target.
> 
>  arch/arm/dts/imx6q-tbs2910-u-boot.dtsi | 219 +++++++++++++++++++++++++
>  1 file changed, 219 insertions(+)
>  create mode 100644 arch/arm/dts/imx6q-tbs2910-u-boot.dtsi
> 
> diff --git a/arch/arm/dts/imx6q-tbs2910-u-boot.dtsi b/arch/arm/dts/imx6q-tbs2910-u-boot.dtsi
> new file mode 100644
> index 0000000000..3e9307f17f
> --- /dev/null
> +++ b/arch/arm/dts/imx6q-tbs2910-u-boot.dtsi
> @@ -0,0 +1,219 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * U-Boot specific modifications for original tbs2910 DTS.
> + * This drops not used nodes/properties to reduce the image size.
> + */
> +
> +/ {
> +	/delete-property/ model;
> +	/delete-property/ compatible;
> +
> +	aliases {
> +		/delete-property/ can0;
> +		/delete-property/ can1;
> +		/delete-property/ gpio3;
> +		/delete-property/ gpio4;
> +		/delete-property/ gpio5;
> +		/delete-property/ ipu1;
> +		/delete-property/ mmc3;
> +		/delete-property/ spi0;
> +		/delete-property/ spi1;
> +		/delete-property/ spi2;
> +		/delete-property/ spi3;
> +		/delete-property/ spi4;
> +		/delete-property/ serial2;
> +		/delete-property/ serial3;
> +		/delete-property/ serial4;
> +		/delete-property/ video1;
> +	};
> +
> +	/delete-node/ cpus;
> +	/delete-node/ capture-subsystem;
> +	/delete-node/ chosen;
> +	/delete-node/ display-subsystem;
> +	/delete-node/ fan;
> +	/delete-node/ ir_recv;
> +	/delete-node/ leds;
> +	/delete-node/ memory;
> +	/delete-node/ sound-sgtl5000;
> +	/delete-node/ sound-spdif;
> +
> +	soc {
> +		u-boot,dm-pre-reloc;
> +		/delete-property/ ranges;
> +		/delete-node/ timer at a00600;
> +
> +		aips-bus at 2000000 {
> +			/delete-property/ ranges;
> +			/delete-node/ aipstz at 207c000;
> +			spba-bus at 2000000 {
> +				/delete-property/ ranges;
> +				/delete-node/ spba at 203c000;
> +			};
> +		};
> +
> +		aips-bus at 2100000 {
> +			/delete-property/ ranges;
> +			/delete-node/ aipstz at 217c000;
> +			/delete-node/ mlb at 218c000;
> +			/delete-node/ romcp at 21ac000;
> +			/delete-node/ tzasc at 21d0000;
> +			/delete-node/ tzasc at 21d4000;
> +			/delete-node/ vdoa at 21e4000;
> +		};
> +	};
> +};
> +
> +&anatop {
> +	/delete-node/ regulator-1p1;
> +	/delete-node/ regulator-2p5;
> +	/delete-node/ regulator-3p0;
> +	/delete-node/ regulator-vddcore;
> +	/delete-node/ regulator-vddpu;
> +	/delete-node/ regulator-vddsoc;
> +};
> +
> +&sata {
> +	/delete-property/ clocks;
> +	/delete-property/ clock-names;
> +	/delete-property/ interrupts;
> +	/delete-property/ interrupts;
> +	/delete-property/ fsl,transmit-level-mV;
> +	/delete-property/ fsl,transmit-boost-mdB;
> +	/delete-property/ fsl,transmit-atten-16ths;
> +	/delete-property/ fsl,receive-eq-mdB;
> +};
> +
> +&pcie {
> +	/delete-property/ reg-names;
> +	/delete-property/ device_type;
> +	/delete-property/ bus-range;
> +	/delete-property/ ranges;
> +	/delete-property/ num-lanes;
> +	/delete-property/ interrupts;
> +	/delete-property/ interrupt-names;
> +	/delete-property/ #interrupt-cells;
> +	/delete-property/ interrupt-map-mask;
> +	/delete-property/ interrupt-map;
> +	/delete-property/ clocks;
> +	/delete-property/ clock-names;
> +};
> +
> +&uart1 {
> +	/delete-property/ interrupts;
> +	/delete-property/ clocks;
> +	/delete-property/ clock-names;
> +	/delete-property/ dmas;
> +	/delete-property/ dma-names;
> +};
> +
> +&uart2 {
> +	/delete-property/ interrupts;
> +	/delete-property/ clocks;
> +	/delete-property/ clock-names;
> +	/delete-property/ dmas;
> +	/delete-property/ dma-names;
> +};
> +
> +/delete-node/ &L2;
> +/delete-node/ &asrc;
> +/delete-node/ &audmux;
> +/delete-node/ &can1;
> +/delete-node/ &can2;
> +/delete-node/ &crypto;
> +/delete-node/ &dcic1;
> +/delete-node/ &dcic2;
> +/delete-node/ &dma_apbh;
> +/delete-node/ &ecspi1;
> +/delete-node/ &ecspi2;
> +/delete-node/ &ecspi3;
> +/delete-node/ &ecspi4;
> +/delete-node/ &ecspi5;
> +/delete-node/ &epit1;
> +/delete-node/ &epit2;
> +/delete-node/ &esai;
> +/delete-node/ &gpt;
> +/delete-node/ &gpio4;
> +/delete-node/ &gpio5;
> +/delete-node/ &gpio6;
> +/delete-node/ &gpu_3d;
> +/delete-node/ &gpu_2d;
> +/delete-node/ &gpu_vg;
> +/delete-node/ &gpmi;
> +/delete-node/ &ipu2;
> +/delete-node/ &kpp;
> +/delete-node/ &ldb;
> +/delete-node/ &mipi_csi;
> +/delete-node/ &mmdc0;
> +/delete-node/ &mmdc1;
> +/delete-node/ &ocotp;
> +/delete-node/ &ocram;
> +/delete-node/ &pinctrl_gpio_fan;
> +/delete-node/ &pinctrl_ir;
> +/delete-node/ &pinctrl_gpio_leds;
> +/delete-node/ &pinctrl_sgtl5000;
> +/delete-node/ &pinctrl_spdif;
> +/delete-node/ &pmu;
> +/delete-node/ &pwm1;
> +/delete-node/ &pwm2;
> +/delete-node/ &pwm3;
> +/delete-node/ &pwm4;
> +/delete-node/ &sdma;
> +/delete-node/ &reg_2p5v;
> +/delete-node/ &sgtl5000;
> +/delete-node/ &snvs;
> +/delete-node/ &spdif;
> +/delete-node/ &src;
> +/delete-node/ &ssi1;
> +/delete-node/ &ssi2;
> +/delete-node/ &ssi3;
> +/delete-node/ &tempmon;
> +/delete-node/ &uart3;
> +/delete-node/ &uart4;
> +/delete-node/ &uart5;
> +/delete-node/ &usbh2;
> +/delete-node/ &usbh3;
> +/delete-node/ &usdhc1;
> +/delete-node/ &vpu;
> +/delete-node/ &wdog2;
> +/delete-node/ &weim;
> +
> +&gpr {
> +	/delete-node/ ipu1_csi0_mux;
> +	/delete-node/ ipu2_csi1_mux;
> +};
> +
> +&gpc {
> +	/delete-node/ pgc;
> +};
> +
> +&hdmi {
> +	/delete-node/ port at 2;
> +	/delete-node/ port at 3;
> +};
> +
> +&mipi_dsi {
> +	ports {
> +		/delete-node/ port at 2;
> +		/delete-node/ port at 3;
> +	};
> +};
> +
> +&ipu1 {
> +	u-boot,dm-pre-reloc;
> +	/delete-property/ interrupts;
> +	/delete-property/ clocks;
> +	/delete-property/ clock-names;
> +	/delete-property/ resets;
> +	/delete-node/ port at 0;
> +	/delete-node/ port at 1;
> +
> +	port at 2 {
> +		/delete-node/ endpoint at 3;
> +		/delete-node/ endpoint at 4;
> +	};
> +	port at 3 {
> +		/delete-node/ endpoint at 3;
> +		/delete-node/ endpoint at 4;
> +	};
> +};

This gets an important conversation started.  Perhaps we should expand
OF_SPL_REMOVE_PROPS for full U-Boot, with some gating symbol for the
platforms that do want to pass through the full DT to the OS?

-- 
Tom
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