At present U-Boot sort-of supports the standard way of reading GPIOs from device tree nodes, but the support is incomplete, a bit clunky and only works for GPIO bindings where #gpio-cells is 2.
Also, this support can now be built into the uclass, rather than parked in a separate file. Add support for requesting GPIOs based on a list in a device tree node, by looking up the phandles. Convert existing boards and remove the old code. As a side-effect, we now no-longer need to include <asm/gpio.h> in fdtdec.h, a problem reported by Masahiro and others. This series is tested on boards as follows, with the objective being to cover each code path: seaboard -------- LCD comes up, USB host shows partitions, NAND can read/write. Both internal MMC and external SD card partition can be read. Ejecting external SD card is detected Tegra20 (SeaBoard) # gpio status Bank B: B2: output: 1 [x] panel.nvidia,lvds-shutdown-gpios Bank C: C6: output: 1 [x] panel.nvidia,panel-vdd-gpios Bank D: D0: output: 0 [x] usb@c5000000.nvidia,vbus-gpio D4: output: 1 [x] panel.nvidia,backlight-enable-gpios Bank H: H1: input: 0 [x] sd...@c8000400.wp-gpios H3: output: 1 [x] nand-controller@70008000.nvidia,wp-gpios Bank I: I5: input: 0 [x] sd...@c8000400.cd-gpios I6: output: 1 [x] sdhci@c8000400.power-gpios Bank W: W0: output: 1 [x] panel.nvidia,backlight-vdd-gpios pit --- LCD comes up, internal MMC and external uSD cards can show a partition list. EC works and the interrupt line behaves as expected. USB stick can display a partition list. pi -- EC works correctly. Simon Glass (21): dm: gpio: Bring in GPIO device tree binding dm: exynos: Bring in GPIO device tree binding dm: tegra: Bring in GPIO device tree binding dm: fdt: Add a function to decode phandles with arguments dm: gpio: Add a native driver model API dm: gpio: Add a driver GPIO translation method dm: gpio: Add better functions to request GPIOs dm: gpio: Mark the old GPIO API deprecated dm: demo: Add a simple GPIO demonstration dm: cros_ec: Remove use of fdtdec GPIO support dm: tegra: Add a GPIO translation function dm: exynos: Add a GPIO translation function dm: tegra: video: Remove use of fdtdec GPIO support dm: tegra: nand: Remove use of fdtdec GPIO support dm: zynq: Remove inline gpio functions dm: mmc: Remove use of fdtdec GPIO support dm: usb: Remove use of fdtdec GPIO support dm: spi: Remove use of fdtdec GPIO support dm: tegra: dts: Use TEGRA_GPIO() macro for all GPIOs dm: exynos: dts: Use GPIO bank phandles for GPIOs dm: fdt: Remove the old GPIO functions arch/arm/dts/exynos4.dtsi | 7 - arch/arm/dts/exynos4210-origen.dts | 2 +- arch/arm/dts/exynos4210-trats.dts | 4 +- arch/arm/dts/exynos4210-universal_c210.dts | 12 +- arch/arm/dts/exynos4412-odroid.dts | 2 +- arch/arm/dts/exynos4412-trats2.dts | 6 +- arch/arm/dts/exynos5.dtsi | 4 +- arch/arm/dts/exynos5250-smdk5250.dts | 2 +- arch/arm/dts/exynos5250-snow.dts | 10 +- arch/arm/dts/exynos5420-peach-pit.dts | 8 +- arch/arm/dts/exynos5422-odroidxu3.dts | 2 +- arch/arm/dts/exynos5800-peach-pi.dts | 10 +- arch/arm/dts/tegra114-dalmore.dts | 5 +- arch/arm/dts/tegra124-jetson-tk1.dts | 9 +- arch/arm/dts/tegra124-venice2.dts | 9 +- arch/arm/dts/tegra20-colibri_t20_iris.dts | 10 +- arch/arm/dts/tegra20-harmony.dts | 28 +- arch/arm/dts/tegra20-medcom-wide.dts | 9 +- arch/arm/dts/tegra20-paz00.dts | 18 +- arch/arm/dts/tegra20-seaboard.dts | 22 +- arch/arm/dts/tegra20-tamonten.dtsi | 9 +- arch/arm/dts/tegra20-tec.dts | 9 +- arch/arm/dts/tegra20-trimslice.dts | 8 +- arch/arm/dts/tegra20-ventana.dts | 18 +- arch/arm/dts/tegra20-whistler.dts | 2 +- arch/arm/dts/tegra30-apalis.dts | 10 +- arch/arm/dts/tegra30-beaver.dts | 10 +- arch/arm/dts/tegra30-cardhu.dts | 8 +- arch/arm/dts/tegra30-colibri.dts | 6 +- arch/arm/dts/tegra30-tamonten.dtsi | 4 +- arch/arm/include/asm/arch-pantheon/gpio.h | 0 arch/arm/include/asm/arch-tegra/tegra_mmc.h | 7 +- arch/arm/include/asm/arch-tegra20/display.h | 9 +- arch/arm/include/asm/arch-zynq/gpio.h | 15 - arch/sandbox/dts/sandbox.dts | 11 +- common/cmd_demo.c | 29 +- doc/device-tree-bindings/gpio/gpio-samsung.txt | 41 +++ doc/device-tree-bindings/gpio/gpio.txt | 211 +++++++++++ .../gpio/nvidia,tegra20-gpio.txt | 40 +++ drivers/demo/demo-shape.c | 71 ++++ drivers/demo/demo-uclass.c | 20 ++ drivers/gpio/gpio-uclass.c | 396 +++++++++++++++++---- drivers/gpio/s5p_gpio.c | 13 +- drivers/gpio/sandbox.c | 20 ++ drivers/gpio/tegra_gpio.c | 18 + drivers/misc/cros_ec.c | 24 +- drivers/mmc/s5p_sdhci.c | 20 +- drivers/mmc/tegra_mmc.c | 36 +- drivers/mtd/nand/tegra_nand.c | 9 +- drivers/spi/soft_spi.c | 62 ++-- drivers/usb/host/ehci-exynos.c | 10 +- drivers/usb/host/ehci-tegra.c | 38 +- drivers/usb/host/xhci-exynos5.c | 10 +- drivers/video/tegra.c | 54 ++- include/asm-generic/gpio.h | 265 ++++++++++++++ include/cros_ec.h | 3 +- include/dm-demo.h | 4 + include/fdtdec.h | 116 +++--- include/sdhci.h | 6 +- lib/fdtdec.c | 195 +++++----- test/dm/gpio.c | 69 +++- test/dm/test.dts | 11 +- 62 files changed, 1561 insertions(+), 535 deletions(-) create mode 100644 arch/arm/include/asm/arch-pantheon/gpio.h create mode 100644 doc/device-tree-bindings/gpio/gpio-samsung.txt create mode 100644 doc/device-tree-bindings/gpio/gpio.txt create mode 100644 doc/device-tree-bindings/gpio/nvidia,tegra20-gpio.txt -- 2.2.0.rc0.207.ga3a616c _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
