On 26 August 2015 at 21:44, Masahiro Yamada <[email protected]> wrote: > This creates a new framework for handling of pin control devices, > i.e. devices that control different aspects of package pins. > > This uclass handles pinmuxing and pin configuration; pinmuxing > controls switching among silicon blocks that share certain physical > pins, pin configuration handles electronic properties such as pin- > biasing, load capacitance etc. > > This framework can support the same device tree bindings, but if you > do not need full interface support, you can disable some features to > reduce memory foot print. Typically around 1.5KB is necessary to > include full-featured uclass support on ARM board (CONFIG_PINCTRL + > CONFIG_PINCTRL_FULL + CONFIG_PINCTRL_GENERIC + CONFIG_PINCTRL_PINMUX), > for example. > > We are often limited on code size for SPL. Besides, we still have > many boards that do not support device tree configuration. The full > pinctrl, which requires OF_CONTROL, does not make sense for those > boards. So, this framework also has a Do-It-Yourself (let's say > simple pinctrl) interface. With CONFIG_PINCTRL_FULL disabled, the > uclass itself provides no systematic mechanism for identifying the > peripheral device, applying pinctrl settings, etc. They must be > done in each low-level driver. In return, you can save much memory > footprint and it might be useful especially for SPL. > > Signed-off-by: Masahiro Yamada <[email protected]> > Acked-by: Simon Glass <[email protected]> > --- > > Changes in v5: > - Delete vogus "select PINCTRL_SIMPLE" > - Make PINCTRL depends on DM > - Make SPL_PINCTRL depends on SPL_DM > - Replace ENOTSUPP with ENOSYS > - Do not bind child nodes as pinconfig nodes if they have "compatible" > > Changes in v4: > - Squash 01 and 02 into a single commit > - Flip the logic of CONFIG_PINCTRL_SIMPLE into CONFIG_PINCTRL_FULL > - Fix build error: pinconf_ops -> pinctrl_ops > - Add pinctrl_get_ops() macro > - Add help to Kconfig entries > - Return -ENOTSUPP rather than -EINVAL for unsupported operations > > drivers/Kconfig | 2 + > drivers/Makefile | 1 + > drivers/core/device.c | 4 + > drivers/pinctrl/Kconfig | 101 +++++++++++ > drivers/pinctrl/Makefile | 2 + > drivers/pinctrl/pinctrl-generic.c | 359 > ++++++++++++++++++++++++++++++++++++++ > drivers/pinctrl/pinctrl-uclass.c | 240 +++++++++++++++++++++++++ > include/dm/pinctrl.h | 227 ++++++++++++++++++++++++ > include/dm/uclass-id.h | 2 + > 9 files changed, 938 insertions(+) > create mode 100644 drivers/pinctrl/Kconfig > create mode 100644 drivers/pinctrl/Makefile > create mode 100644 drivers/pinctrl/pinctrl-generic.c > create mode 100644 drivers/pinctrl/pinctrl-uclass.c > create mode 100644 include/dm/pinctrl.h
Applied to u-boot-dm, thanks! _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
