[U-Boot] [RFC PATCH v4 0/11] Enable driver model for GPIOs on Tegra and Exynos

[Simon Glass]

Now that driver model is part of U-Boot, the task of converting drivers over
to it begins. GPIO is one of the easiest to convert, since it already has a
sandbox driver and a uclass driver.

The Tegra GPIO driver is relatively simple since it has a linear numbering
and already uses the generic GPIO framework. Each GPIO bank has a separate
device. Some arguments have been made that a single device should support
all the GPIO banks, but currently the driver model uclass does not work that
way and it would require a second-level data structure to handle the bank
feature.

This driver has been tested on Trimslice (Tegra 20). I will try it on a
beaver also (soon!).

For exynos, the pinctrl device tree files are brought in from the kernel
and cut down to remove the groupings which we don't yet use. Very small
additions are made to avoid replicating the awful tables that Linux has
for every exynos SoC.

So far this fails to build for four boards (smdkc100, smdkv310, s5p_goni,
arndale) because they don't use exynos5-dt.h. I'll take a look at this
when I figure out how to make a common exynos5 config.

The 'gpio' command is updated to support display of only the allocated
GPIOs. This is much more friendly than displaying a large table.

A related clean-ups are provided as well.

Changes in v4:
- Rename struct device to struct udevice
- Add new patch to enhance 'gpio' command
- Add patches for exynos GPIO support

Changes in v3:
- Move dm command enable to previous patch
- Use gpio number for the internal helper functions

Changes in v2:
- Split out driver model changes into separate patches
- Correct bugs found during testing

Simon Glass (11):
  tegra: Convert tegra GPIO driver to use driver model
  exynos: Bring in pinctrl dts files from Linux kernel
  exynos: dts: Remove unused pinctrl information to save space
  exynos: dts: Adjust device tree files for U-Boot
  exynos: dts: Convert /include/ to #include
  exynos: Tidy up GPIO headers
  exynos: Tidy up GPIO defines
  exynos: Make sure that GPIOs are requested
  dm: gpio: Enhance gpio command to show only active GPIOs
  exynos: gpio: Convert to driver model
  dm: sandbox: dts: Add a GPIO bank

 arch/arm/cpu/armv7/exynos/pinmux.c         |   5 +-
 arch/arm/dts/exynos4.dtsi                  |   9 +-
 arch/arm/dts/exynos4210-origen.dts         |   4 +-
 arch/arm/dts/exynos4210-pinctrl.dtsi       | 305 ++++++++++++++++++++
 arch/arm/dts/exynos4210-trats.dts          |   2 +-
 arch/arm/dts/exynos4210-universal_c210.dts |   2 +-
 arch/arm/dts/exynos4210.dtsi               | 161 +++++++++++
 arch/arm/dts/exynos4412-trats2.dts         |   2 +-
 arch/arm/dts/exynos4412.dtsi               |  38 +++
 arch/arm/dts/exynos4x12-pinctrl.dtsi       | 350 +++++++++++++++++++++++
 arch/arm/dts/exynos4x12.dtsi               | 122 ++++++++
 arch/arm/dts/exynos5.dtsi                  |  56 +++-
 arch/arm/dts/exynos5250-pinctrl.dtsi       | 335 ++++++++++++++++++++++
 arch/arm/dts/exynos5250-smdk5250.dts       |   2 +-
 arch/arm/dts/exynos5250-snow.dts           |   2 +-
 arch/arm/dts/exynos5250.dtsi               |  48 +++-
 arch/arm/dts/exynos5420-peach-pit.dts      |   2 +-
 arch/arm/dts/exynos5420-pinctrl.dtsi       | 316 ++++++++++++++++++++
 arch/arm/dts/exynos5420-smdk5420.dts       |   2 +-
 arch/arm/dts/exynos5420.dtsi               | 125 ++++++++
 arch/arm/dts/exynos54xx.dtsi               |  57 +++-
 arch/arm/include/asm/arch-exynos/gpio.h    |   4 -
 arch/arm/include/asm/arch-s5pc1xx/gpio.h   |   4 -
 arch/arm/include/asm/arch-tegra/gpio.h     |  15 +-
 arch/sandbox/dts/sandbox.dts               |   9 +
 board/nvidia/seaboard/seaboard.c           |   2 +-
 board/samsung/arndale/arndale.c            |   2 +-
 board/samsung/common/board.c               |   2 +-
 board/samsung/common/misc.c                |   1 -
 board/samsung/goni/goni.c                  |   2 +-
 board/samsung/origen/origen.c              |   2 +-
 board/samsung/smdk5250/exynos5-dt.c        |   7 +
 board/samsung/smdk5420/smdk5420.c          |   4 +-
 board/samsung/smdkc100/smdkc100.c          |   2 +-
 board/samsung/smdkv310/smdkv310.c          |   2 +-
 board/samsung/trats/trats.c                |   2 +-
 board/samsung/trats2/trats2.c              |   1 +
 board/samsung/universal_c210/universal.c   |   1 -
 common/cmd_gpio.c                          | 101 ++++---
 drivers/gpio/s5p_gpio.c                    | 443 +++++++++++++++++++----------
 drivers/gpio/tegra_gpio.c                  | 313 ++++++++++++++++----
 drivers/mmc/s5p_sdhci.c                    |   7 +-
 include/asm-generic/gpio.h                 |  15 +-
 include/configs/exynos4-dt.h               |   4 +
 include/configs/exynos5-dt.h               |   4 +
 include/configs/tegra-common.h             |   1 +
 46 files changed, 2615 insertions(+), 280 deletions(-)
 create mode 100644 arch/arm/dts/exynos4210-pinctrl.dtsi
 create mode 100644 arch/arm/dts/exynos4210.dtsi
 create mode 100644 arch/arm/dts/exynos4412.dtsi
 create mode 100644 arch/arm/dts/exynos4x12-pinctrl.dtsi
 create mode 100644 arch/arm/dts/exynos4x12.dtsi
 create mode 100644 arch/arm/dts/exynos5250-pinctrl.dtsi
 create mode 100644 arch/arm/dts/exynos5420-pinctrl.dtsi
 create mode 100644 arch/arm/dts/exynos5420.dtsi

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2.0.0.526.g5318336