pinctrl: Remove DM_FLAG_PRE_RELOC flag in various drivers
authorBin Meng <bmeng.cn@gmail.com>
Wed, 24 Oct 2018 13:36:33 +0000 (06:36 -0700)
committerSimon Glass <sjg@chromium.org>
Wed, 14 Nov 2018 17:16:28 +0000 (09:16 -0800)
commitad0e8048437e776e687a977a84494852a64f4693
tree011adec868e9135576025dbef3f6471f26ab3afa
parent223b10ca7a6b1d35db9c775033895969b132ad56
pinctrl: Remove DM_FLAG_PRE_RELOC flag in various drivers

When a driver declares DM_FLAG_PRE_RELOC flag, it wishes to be
bound before relocation. However due to a bug in the DM core,
the flag only takes effect when devices are statically declared
via U_BOOT_DEVICE(). This bug has been fixed recently by commit
"dm: core: Respect drivers with the DM_FLAG_PRE_RELOC flag in
lists_bind_fdt()", but with the fix, it has a side effect that
all existing drivers that declared DM_FLAG_PRE_RELOC flag will
be bound before relocation now. This may expose potential boot
failure on some boards due to insufficient memory during the
pre-relocation stage.

To mitigate this potential impact, the following changes are
implemented:

- Remove DM_FLAG_PRE_RELOC flag in the driver, if the driver
  only supports configuration from device tree (OF_CONTROL)
- Keep DM_FLAG_PRE_RELOC flag in the driver only if the device
  is statically declared via U_BOOT_DEVICE()
- Surround DM_FLAG_PRE_RELOC flag with OF_CONTROL check, for
  drivers that support both statically declared devices and
  configuration from device tree

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
drivers/pinctrl/broadcom/pinctrl-bcm283x.c
drivers/pinctrl/exynos/pinctrl-exynos7420.c
drivers/pinctrl/nxp/pinctrl-imx5.c
drivers/pinctrl/nxp/pinctrl-imx6.c
drivers/pinctrl/nxp/pinctrl-imx7.c
drivers/pinctrl/nxp/pinctrl-imx7ulp.c
drivers/pinctrl/pinctrl-single.c
drivers/pinctrl/uniphier/pinctrl-uniphier-pro4.c
drivers/pinctrl/uniphier/pinctrl-uniphier-pro5.c