The original livetree series [1] proved out the concept of a live device tree in U-Boot. This involved converting the existing flat tree into a node-based data structure immediately after relocation, and adjusting some existing drivers to continue to work.
Several points came out of that work:
1. We need to avoid increasing code size for boards which continue to use the flat device tree
2. Code-size increase for the live tree should be minimal, ideally only a small one-off cost rather than a per-driver increment
3. Drivers should be written to support either type of tree, and both
4. We need a new API to read from the device tree from drivers (ie. using dev_read...(struct udevice *) instead of fdtdec_get_...(blob, offset, ...) so that they don't need to worry about which type of tree is used.
This series defines a new means of referring to a device tree node, and updates U-Boot to use it. It does not include any support for live tree.
Following on from this will come conversion of sandbox to support live tree, including getting all tests to pass
After that will be conversion of a representative board to support live tree, as a way of evaluating code-size impact.
Ideally I would like to get all of the above sent out for review and applied for the next release, but this depends on timing and feedback.
Finally, some documentation will be added and all existing drivers converted to the new dev_read...() API, assuming this is practical.
[1] http://u-boot.10912.n7.nabble.com/PATCH-00-22-dm-Add-support-for-a-live-devi...
Changes in v3: - Update commit message to mention dm/read.h instead of dm/ofnode.h - Add more detail in the commit message about why global_data is needed - Drop struct fdtdec_phandle_args and DECLARE_GLOBAL_DATA_PTR from header
Changes in v2: - Cut the series down to only prepare the way for live tree - Drop all live tree changes - Adjust storage to avoid a code size increase
Simon Glass (9): dm: Use dm.h header when driver mode is used dm: core: Move dev_get_addr() etc. into a separate file dm: Rename dev_addr..() functions atmel: Fix up use of dm_scan_fdt_node() dm: Fix up inclusion of common.h dm: core: Dont export dm_scan_fdt_node() dm: core: Replace of_offset with accessor (part 2) dm: core: Add ofnode to represent device tree nodes dm: core: Adjust device_bind_common() to take an ofnode
arch/arm/lib/bootm.c | 2 +- arch/arm/mach-mvebu/sata.c | 2 +- arch/arm/mach-rockchip/rk3188/sdram_rk3188.c | 2 +- arch/arm/mach-rockchip/rk3328/clk_rk3328.c | 2 +- arch/arm/mach-rockchip/rk3399/sdram_rk3399.c | 2 +- arch/arm/mach-snapdragon/clock-apq8016.c | 2 +- arch/arm/mach-uniphier/pinctrl-glue.c | 4 +- arch/sandbox/cpu/cpu.c | 1 + board/amlogic/odroid-c2/odroid-c2.c | 2 +- board/armltd/integrator/integrator.c | 2 +- board/armltd/vexpress64/vexpress64.c | 2 +- board/beckhoff/mx53cx9020/mx53cx9020.c | 2 +- board/cadence/xtfpga/xtfpga.c | 2 +- board/cavium/thunderx/thunderx.c | 2 +- board/freescale/common/fsl_chain_of_trust.c | 1 + board/freescale/common/fsl_validate.c | 2 +- board/st/stm32f429-discovery/stm32f429-discovery.c | 2 +- board/st/stm32f746-disco/stm32f746-disco.c | 2 +- board/st/stv0991/stv0991.c | 2 +- board/toradex/apalis_imx6/apalis_imx6.c | 1 + board/toradex/colibri_imx6/colibri_imx6.c | 1 + board/toradex/colibri_pxa270/colibri_pxa270.c | 1 + cmd/bootefi.c | 2 +- common/env_sf.c | 1 + drivers/adc/exynos-adc.c | 2 +- drivers/block/dwc_ahci.c | 10 +- drivers/block/sata_ceva.c | 2 +- drivers/clk/aspeed/clk_ast2500.c | 2 +- drivers/clk/at91/clk-generated.c | 2 +- drivers/clk/at91/clk-h32mx.c | 2 +- drivers/clk/at91/clk-main.c | 2 +- drivers/clk/at91/clk-master.c | 2 +- drivers/clk/at91/clk-peripheral.c | 2 +- drivers/clk/at91/clk-plla.c | 2 +- drivers/clk/at91/clk-slow.c | 2 +- drivers/clk/at91/clk-system.c | 2 +- drivers/clk/at91/clk-utmi.c | 2 +- drivers/clk/at91/pmc.c | 7 +- drivers/clk/at91/sckc.c | 3 +- drivers/clk/clk_bcm6345.c | 2 +- drivers/clk/clk_fixed_rate.c | 2 +- drivers/clk/clk_zynq.c | 2 +- drivers/clk/clk_zynqmp.c | 2 +- drivers/clk/exynos/clk-exynos7420.c | 4 +- drivers/clk/rockchip/clk_rk3036.c | 2 +- drivers/clk/rockchip/clk_rk3188.c | 2 +- drivers/clk/rockchip/clk_rk3288.c | 2 +- drivers/clk/rockchip/clk_rk3328.c | 2 +- drivers/clk/rockchip/clk_rk3399.c | 4 +- drivers/clk/uniphier/clk-uniphier-core.c | 4 +- drivers/core/Makefile | 2 +- drivers/core/device.c | 143 ++------------------- drivers/core/fdtaddr.c | 143 +++++++++++++++++++++ drivers/core/regmap.c | 5 +- drivers/core/root.c | 19 ++- drivers/cpu/bmips_cpu.c | 2 +- drivers/dma/ti-edma3.c | 4 +- drivers/firmware/firmware-uclass.c | 3 +- drivers/firmware/psci.c | 6 +- drivers/gpio/altera_pio.c | 2 +- drivers/gpio/at91_gpio.c | 2 +- drivers/gpio/atmel_pio4.c | 5 +- drivers/gpio/bcm2835_gpio.c | 2 +- drivers/gpio/bcm6345_gpio.c | 6 +- drivers/gpio/gpio-uniphier.c | 4 +- drivers/gpio/imx_rgpio2p.c | 2 +- drivers/gpio/lpc32xx_gpio.c | 1 + drivers/gpio/msm_gpio.c | 2 +- drivers/gpio/mvebu_gpio.c | 2 +- drivers/gpio/mxc_gpio.c | 2 +- drivers/gpio/omap_gpio.c | 2 +- drivers/gpio/pm8916_gpio.c | 4 +- drivers/gpio/rk_gpio.c | 2 +- drivers/gpio/s5p_gpio.c | 4 +- drivers/gpio/stm32f7_gpio.c | 2 +- drivers/gpio/sunxi_gpio.c | 2 +- drivers/gpio/tegra186_gpio.c | 2 +- drivers/gpio/tegra_gpio.c | 2 +- drivers/gpio/vybrid_gpio.c | 2 +- drivers/gpio/zynq_gpio.c | 2 +- drivers/i2c/Kconfig | 1 - drivers/i2c/ast_i2c.c | 2 +- drivers/i2c/at91_i2c.c | 2 +- drivers/i2c/davinci_i2c.c | 2 +- drivers/i2c/designware_i2c.c | 2 +- drivers/i2c/exynos_hs_i2c.c | 2 +- drivers/i2c/i2c-cdns.c | 4 +- drivers/i2c/i2c-uniphier-f.c | 4 +- drivers/i2c/i2c-uniphier.c | 4 +- drivers/i2c/imx_lpi2c.c | 80 ++++++------ drivers/i2c/mv_i2c.c | 2 +- drivers/i2c/mvtwsi.c | 2 +- drivers/i2c/mxc_i2c.c | 2 +- drivers/i2c/omap24xx_i2c.c | 2 +- drivers/i2c/rk_i2c.c | 2 +- drivers/i2c/s3c24x0_i2c.c | 2 +- drivers/i2c/tegra_i2c.c | 2 +- drivers/input/tegra-kbc.c | 2 +- drivers/led/led_bcm6328.c | 5 +- drivers/led/led_bcm6358.c | 5 +- drivers/mailbox/tegra-hsp.c | 2 +- drivers/misc/altera_sysid.c | 2 +- drivers/mmc/atmel_sdhci.c | 2 +- drivers/mmc/bcm2835_sdhci.c | 2 +- drivers/mmc/fsl_esdhc.c | 2 +- drivers/mmc/gen_atmel_mci.c | 4 +- drivers/mmc/meson_gx_mmc.c | 4 +- drivers/mmc/mmc-uclass.c | 2 +- drivers/mmc/msm_sdhci.c | 2 +- drivers/mmc/omap_hsmmc.c | 3 +- drivers/mmc/pic32_sdhci.c | 2 +- drivers/mmc/rockchip_dw_mmc.c | 2 +- drivers/mmc/rockchip_sdhci.c | 2 +- drivers/mmc/sdhci-cadence.c | 6 +- drivers/mmc/socfpga_dw_mmc.c | 2 +- drivers/mmc/sti_sdhci.c | 2 +- drivers/mmc/tangier_sdhci.c | 2 +- drivers/mmc/tegra_mmc.c | 4 +- drivers/mmc/uniphier-sd.c | 4 +- drivers/mmc/xenon_sdhci.c | 4 +- drivers/mmc/zynq_sdhci.c | 4 +- drivers/net/ag7xxx.c | 2 +- drivers/net/cpsw.c | 2 +- drivers/net/designware.c | 2 +- drivers/net/dwc_eth_qos.c | 4 +- drivers/net/ethoc.c | 6 +- drivers/net/fec_mxc.c | 2 +- drivers/net/keystone_net.c | 2 +- drivers/net/macb.c | 2 +- drivers/net/mvneta.c | 2 +- drivers/net/mvpp2.c | 8 +- drivers/net/phy/phy.c | 2 +- drivers/net/phy/ti.c | 2 +- drivers/net/sandbox-raw.c | 2 +- drivers/net/sandbox.c | 2 +- drivers/net/sun8i_emac.c | 8 +- drivers/net/sunxi_emac.c | 2 +- drivers/net/tsec.c | 2 +- drivers/net/xilinx_axi_emac.c | 2 +- drivers/net/xilinx_emaclite.c | 2 +- drivers/net/zynq_gem.c | 2 +- drivers/pci/pcie_dw_mvebu.c | 4 +- drivers/phy/marvell/comphy_core.c | 4 +- drivers/phy/ti-pipe3-phy.c | 4 +- drivers/pinctrl/ath79/pinctrl_ar933x.c | 2 +- drivers/pinctrl/ath79/pinctrl_qca953x.c | 2 +- drivers/pinctrl/exynos/pinctrl-exynos.c | 2 +- drivers/pinctrl/meson/pinctrl-meson-gxbb.c | 3 +- drivers/pinctrl/meson/pinctrl-meson.c | 2 +- drivers/pinctrl/mvebu/pinctrl-mvebu.c | 2 +- drivers/pinctrl/nxp/pinctrl-imx.c | 2 +- drivers/pinctrl/nxp/pinctrl-imx5.c | 3 +- drivers/pinctrl/nxp/pinctrl-imx6.c | 3 +- drivers/pinctrl/nxp/pinctrl-imx7.c | 3 +- drivers/pinctrl/nxp/pinctrl-imx7ulp.c | 3 +- drivers/pinctrl/pinctrl-at91-pio4.c | 4 +- drivers/pinctrl/pinctrl-at91.c | 6 +- drivers/pinctrl/pinctrl-generic.c | 2 +- drivers/pinctrl/pinctrl-sandbox.c | 2 +- drivers/pinctrl/pinctrl-single.c | 13 +- drivers/pinctrl/pinctrl-uclass.c | 3 +- drivers/pinctrl/pinctrl_stm32.c | 2 +- drivers/pinctrl/rockchip/pinctrl_rk3188.c | 4 +- drivers/pinctrl/rockchip/pinctrl_rk3328.c | 2 +- drivers/pinctrl/uniphier/pinctrl-uniphier-core.c | 4 +- drivers/pinctrl/uniphier/pinctrl-uniphier-ld11.c | 3 +- drivers/pinctrl/uniphier/pinctrl-uniphier-ld20.c | 3 +- drivers/pinctrl/uniphier/pinctrl-uniphier-ld4.c | 3 +- drivers/pinctrl/uniphier/pinctrl-uniphier-ld6b.c | 3 +- drivers/pinctrl/uniphier/pinctrl-uniphier-pro4.c | 3 +- drivers/pinctrl/uniphier/pinctrl-uniphier-pro5.c | 3 +- drivers/pinctrl/uniphier/pinctrl-uniphier-pxs2.c | 3 +- drivers/pinctrl/uniphier/pinctrl-uniphier-pxs3.c | 3 +- drivers/pinctrl/uniphier/pinctrl-uniphier-sld3.c | 3 +- drivers/pinctrl/uniphier/pinctrl-uniphier-sld8.c | 3 +- drivers/power/domain/bcm6328-power-domain.c | 2 +- drivers/power/pmic/pm8916.c | 2 +- drivers/pwm/exynos_pwm.c | 2 +- drivers/pwm/rk_pwm.c | 2 +- drivers/pwm/tegra_pwm.c | 2 +- drivers/ram/bmips_ram.c | 4 +- drivers/ram/stm32_sdram.c | 2 +- drivers/reset/reset-bcm6345.c | 2 +- drivers/reset/reset-uniphier.c | 4 +- drivers/serial/altera_jtag_uart.c | 2 +- drivers/serial/altera_uart.c | 2 +- drivers/serial/atmel_usart.c | 2 +- drivers/serial/ns16550.c | 2 +- drivers/serial/serial_ar933x.c | 2 +- drivers/serial/serial_arc.c | 2 +- drivers/serial/serial_bcm283x_mu.c | 2 +- drivers/serial/serial_bcm6345.c | 4 +- drivers/serial/serial_lpuart.c | 4 +- drivers/serial/serial_meson.c | 2 +- drivers/serial/serial_msm.c | 2 +- drivers/serial/serial_mvebu_a3700.c | 2 +- drivers/serial/serial_mxc.c | 2 +- drivers/serial/serial_pl01x.c | 2 +- drivers/serial/serial_s5p.c | 2 +- drivers/serial/serial_sti_asc.c | 2 +- drivers/serial/serial_stm32x7.c | 2 +- drivers/serial/serial_uniphier.c | 5 +- drivers/serial/serial_xuartlite.c | 2 +- drivers/serial/serial_zynq.c | 2 +- drivers/spi/altera_spi.c | 2 +- drivers/spi/ath79_spi.c | 2 +- drivers/spi/atmel_spi.c | 2 +- drivers/spi/davinci_spi.c | 2 +- drivers/spi/designware_spi.c | 2 +- drivers/spi/exynos_spi.c | 2 +- drivers/spi/fsl_dspi.c | 4 +- drivers/spi/kirkwood_spi.c | 2 +- drivers/spi/mvebu_a3700_spi.c | 2 +- drivers/spi/omap3_spi.c | 2 +- drivers/spi/rk_spi.c | 2 +- drivers/spi/tegra114_spi.c | 2 +- drivers/spi/tegra20_sflash.c | 2 +- drivers/spi/tegra20_slink.c | 2 +- drivers/spi/tegra210_qspi.c | 2 +- drivers/spi/ti_qspi.c | 12 +- drivers/spi/zynq_spi.c | 2 +- drivers/spmi/spmi-msm.c | 2 +- drivers/sysreset/sysreset_psci.c | 3 +- drivers/sysreset/sysreset_snapdragon.c | 2 +- drivers/timer/altera_timer.c | 2 +- drivers/timer/arc_timer.c | 2 +- drivers/timer/ast_timer.c | 2 +- drivers/timer/omap-timer.c | 2 +- drivers/tpm/tpm_tis_lpc.c | 2 +- drivers/usb/host/dwc2.c | 2 +- drivers/usb/host/ehci-atmel.c | 2 +- drivers/usb/host/ehci-exynos.c | 2 +- drivers/usb/host/ehci-fsl.c | 2 +- drivers/usb/host/ehci-generic.c | 2 +- drivers/usb/host/ehci-marvell.c | 2 +- drivers/usb/host/ehci-msm.c | 2 +- drivers/usb/host/ehci-mx6.c | 4 +- drivers/usb/host/ehci-sunxi.c | 2 +- drivers/usb/host/ehci-tegra.c | 2 +- drivers/usb/host/ehci-vf.c | 2 +- drivers/usb/host/ehci-zynq.c | 2 +- drivers/usb/host/ohci-generic.c | 2 +- drivers/usb/host/ohci-sunxi.c | 2 +- drivers/usb/host/xhci-exynos5.c | 2 +- drivers/usb/host/xhci-fsl.c | 2 +- drivers/usb/host/xhci-mvebu.c | 2 +- drivers/usb/host/xhci-rockchip.c | 4 +- drivers/usb/musb-new/sunxi.c | 1 + drivers/usb/musb-new/ti-musb.c | 2 +- drivers/video/atmel_hlcdfb.c | 6 +- drivers/video/exynos/exynos_dp.c | 4 +- drivers/video/exynos/exynos_fb.c | 2 +- drivers/video/rockchip/rk_edp.c | 2 +- drivers/video/rockchip/rk_hdmi.c | 2 +- drivers/video/rockchip/rk_lvds.c | 2 +- drivers/video/rockchip/rk_mipi.c | 2 +- drivers/video/rockchip/rk_vop.c | 2 +- drivers/video/tegra.c | 2 +- drivers/video/tegra124/dp.c | 2 +- drivers/watchdog/ast_wdt.c | 2 +- include/dm.h | 2 + include/dm/device.h | 106 ++------------- include/dm/fdtaddr.h | 110 ++++++++++++++++ include/dm/ofnode.h | 96 ++++++++++++++ include/dm/root.h | 16 --- 265 files changed, 777 insertions(+), 610 deletions(-) create mode 100644 drivers/core/fdtaddr.c create mode 100644 include/dm/fdtaddr.h create mode 100644 include/dm/ofnode.h