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u-boot/drivers/gpio
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Simon Glass 8a45b22057 gpio: Add a way to read 3-way strapping pins 
Using the internal vs. external pull resistors it is possible to get
27 different combinations from 3 strapping pins. Add an implementation
of this.

This involves updating the sandbox GPIO driver to model external and
(weaker) internal pull resistors. The get_value() method now takes account
of what is driving a pin:

   sandbox: GPIOD_EXT_DRIVEN - in which case GPIO_EXT_HIGH provides the
          value
   outside source - in which case GPIO_EXT_PULL_UP/DOWN indicates the
          external state and we work the final state using those flags and
          the internal GPIOD_PULL_UP/DOWN flags

Of course the outside source does not really exist in sandbox. We are just
modelling it for test purpose.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-03-03 15:40:47 -05:00
..
74x164_gpio.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
adi_gpio2.c common: Drop linux/bug.h from common header 2020-05-18 21:19:23 -04:00
altera_pio.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
at91_gpio.c dm: treewide: Rename ..._platdata variables to just ..._plat 2020-12-13 16:51:09 -07:00
atmel_pio4.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
axp_gpio.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
bcm2835_gpio.c dm: treewide: Rename ..._platdata variables to just ..._plat 2020-12-13 16:51:09 -07:00
bcm6345_gpio.c dm: treewide: Rename auto_alloc_size members to be shorter 2020-12-13 08:00:25 -07:00
cortina_gpio.c dm: treewide: Rename auto_alloc_size members to be shorter 2020-12-13 08:00:25 -07:00
da8xx_gpio.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
da8xx_gpio.h dm: treewide: Rename ..._platdata variables to just ..._plat 2020-12-13 16:51:09 -07:00
db8500_gpio.c GPIO: Correct doc typo "confguration" -> "configuration" 2017-02-08 16:24:29 -05:00
dwapb_gpio.c dm: Use access methods for dev/uclass private data 2021-01-05 12:24:40 -07:00
gpio-rcar.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
gpio-rza1.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
gpio-uclass.c gpio: Add a way to read 3-way strapping pins 2021-03-03 15:40:47 -05:00
gpio-uniphier.c dm: treewide: Rename auto_alloc_size members to be shorter 2020-12-13 08:00:25 -07:00
hi6220_gpio.c dm: Use access methods for dev/uclass private data 2021-01-05 12:24:40 -07:00
hsdk-creg-gpio.c dm: treewide: Rename 'platdata' variables to just 'plat' 2020-12-13 16:51:08 -07:00
imx_rgpio2p.c dm: Rename U_BOOT_DEVICE() to U_BOOT_DRVINFO() 2021-01-05 12:26:35 -07:00
intel_broadwell_gpio.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
intel_gpio.c gpio: x86: Drop the deprecated methods in intel_gpio 2021-03-03 15:40:11 -05:00
intel_ich6_gpio.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
iproc_gpio.c gpio: Update for new sequence numbers 2020-12-18 20:32:21 -07:00
Kconfig gpio: Add support for DM GPIO for Kirkwood 2021-01-27 07:25:39 +01:00
kona_gpio.c dm: core: Create a new header file for 'compat' features 2020-02-05 19:33:46 -07:00
kw_gpio.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
lpc32xx_gpio.c dm: Use access methods for dev/uclass private data 2021-01-05 12:24:40 -07:00
Makefile gpio: add GPIO controller driver for MediaTek MT7620 SoC 2021-01-24 21:39:26 +01:00
mpc8xxx_gpio.c gpio: mpc8xxx_gpio: Fix for litte endian 2021-02-08 14:01:19 +05:30
mpc83xx_gpio.c dm: core: Create a new header file for 'compat' features 2020-02-05 19:33:46 -07:00
mpc83xx_spisel_boot.c dm: treewide: Rename ..._platdata variables to just ..._plat 2020-12-13 16:51:09 -07:00
mscc_sgpio.c dm: treewide: Rename auto_alloc_size members to be shorter 2020-12-13 08:00:25 -07:00
msm_gpio.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
mt7620_gpio.c gpio: add GPIO controller driver for MediaTek MT7620 SoC 2021-01-24 21:39:26 +01:00
mt7621_gpio.c dm: Use access methods for dev/uclass private data 2021-01-05 12:24:40 -07:00
mvebu_gpio.c gpio: Update for new sequence numbers 2020-12-18 20:32:21 -07:00
mvgpio.c dm: core: Create a new header file for 'compat' features 2020-02-05 19:33:46 -07:00
mvgpio.h SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
mvmfp.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
mxc_gpio.c dm: Rename U_BOOT_DRIVER_ALIAS to DM_DRIVER_ALIAS 2021-01-05 12:26:35 -07:00
mxs_gpio.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
nx_gpio.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
octeon_gpio.c dm: core: Access device ofnode through functions 2021-01-05 12:24:41 -07:00
omap_gpio.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
pca953x.c command: Remove the cmd_tbl_t typedef 2020-05-18 18:36:55 -04:00
pca953x_gpio.c dm: treewide: Rename dev_get_platdata() to dev_get_plat() 2020-12-13 16:51:09 -07:00
pca9698.c dm: core: Create a new header file for 'compat' features 2020-02-05 19:33:46 -07:00
pcf8575_gpio.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
pic32_gpio.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
pm8916_gpio.c dm: treewide: Rename ofdata_to_platdata() to of_to_plat() 2020-12-13 16:51:09 -07:00
rk_gpio.c dm: treewide: Rename auto_alloc_size members to be shorter 2020-12-13 08:00:25 -07:00
s5p_gpio.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
sandbox.c gpio: Add a way to read 3-way strapping pins 2021-03-03 15:40:47 -05:00
sh_pfc.c common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
sifive-gpio.c dm: treewide: Rename ..._platdata variables to just ..._plat 2020-12-13 16:51:09 -07:00
spear_gpio.c dm: core: Create a new header file for 'compat' features 2020-02-05 19:33:46 -07:00
stm32_gpio.c dm: gpio: Add a way to update flags 2021-03-03 15:40:10 -05:00
sunxi_gpio.c sunxi: gpio: introduce compatible for H616 2021-01-25 21:52:01 +00:00
tca642x.c gpio: tca642x: fix input subcommand for gpio banks > 0 2021-01-12 10:21:41 +05:30
tegra186_gpio.c dm: Use access methods for dev/uclass private data 2021-01-05 12:24:40 -07:00
tegra186_gpio_priv.h common: Drop linux/bitops.h from common header 2020-05-18 21:19:23 -04:00
tegra_gpio.c dm: Use access methods for dev/uclass private data 2021-01-05 12:24:40 -07:00
vybrid_gpio.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
xilinx_gpio.c dm: treewide: Rename ..._platdata variables to just ..._plat 2020-12-13 16:51:09 -07:00
zynq_gpio.c dm: treewide: Rename ..._platdata variables to just ..._plat 2020-12-13 16:51:09 -07:00