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path: root/drivers/gpio
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2021-10-05gpio: Factor out DT flag translationSamuel Holland
The generic GPIO flags binding is shared across many drivers, some of which need their own xlate function. Factor out the flag translation code from gpio_xlate_offs_flags so it does not need to be duplicated. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-10-05gpio: Verify validity of pin offsets from device treesSamuel Holland
Translation of an OF GPIO specifier should fail if the pin offset is larger than the number of pins in the GPIO bank. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-10-05gpio: Verify validity of pin offsets when looking up namesSamuel Holland
Translation of a pin name to a device+offset should fail if the offset is larger than the number of pins in the GPIO bank. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-10-01arm: Remove zmx25 board and ARCH_MX25Tom Rini
This board has not been converted to CONFIG_DM by the deadline. Remove it. As this is the last ARCH_MX25 platform, remove those references as well. Cc: Matthias Weisser <weisserm@arcor.de> Cc: Stefano Babic <sbabic@denx.de> Signed-off-by: Tom Rini <trini@konsulko.com>
2021-10-01arm: Remove aspenite boardTom Rini
This board has not been converted to CONFIG_DM by the deadline. Remove it. As this is the last armada100 platform, remove that support as well. Cc: Prafulla Wadaskar <prafulla@marvell.com> Signed-off-by: Tom Rini <trini@konsulko.com>
2021-09-30WS cleanup: remove excessive empty linesWolfgang Denk
Signed-off-by: Wolfgang Denk <wd@denx.de>
2021-09-30WS cleanup: remove trailing empty linesWolfgang Denk
Signed-off-by: Wolfgang Denk <wd@denx.de>
2021-09-25dm: gpio: Add of-platdata supportSimon Glass
Add support for accessing GPIOs using of-plata. This uses the same mechanism as for clocks, but allows use of the xlate() method so that the driver can interpret the parameters. Update the condition for GPIO_HOG so that it is not built into SPL, since it needs SPL_OF_REAL which is not enabled in sandbox_spl. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-09-25treewide: Use OF_REAL instead of !OF_PLATDATASimon Glass
Now that we have a 'positive' Kconfig option, use this instead of the negative one, which is harder to understand. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-09-25treewide: Simply conditions with the new OF_REALSimon Glass
Use this new Kconfig to simplify the compilation conditions where appropriate. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-09-16Merge tag 'v2021.10-rc4' into nextTom Rini
Prepare v2021.10-rc4 Signed-off-by: Tom Rini <trini@konsulko.com> # gpg: Signature made Tue 14 Sep 2021 06:58:32 PM EDT # gpg: using RSA key 1A3C7F70E08FAB1707809BBF147C39FF9634B72C # gpg: Good signature from "Thomas Rini <trini@konsulko.com>" [ultimate] # Conflicts: # board/Arcturus/ucp1020/spl.c # cmd/mvebu/Kconfig # common/Kconfig.boot # common/image-fit.c # configs/UCP1020_defconfig # configs/sifive_unmatched_defconfig # drivers/pci/Kconfig # include/configs/UCP1020.h # include/configs/sifive-unmatched.h # lib/Makefile # scripts/config_whitelist.txt
2021-09-13pci: Drop DM_PCISimon Glass
This option has not effect now. Drop it, using PCI instead where needed. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-09-04gpio: Add a GPIO configSimon Glass
At present we have SPL_GPIO and TPL_GPIO but not piain GPIO. This works because there is a special build rule in Makefile that always includes the drivers/gpio directory. It is better to have all driver directories included by drivers/Makefile and there is already a rule in there for this purpose. It just needs a Kconfig for U-Boot proper, so add one. Enable the option always for now, since this mimics current behaviour. This can be updated once DM_GPIO is used everywhere. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-09-04tegra: gpio: Drop use of CONFIG_xxx variablesSimon Glass
It is not a good idea to use things called CONFIG_xxx in the source code since this prefix is reserved for use by Kconfig. Rename these variables. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-08-31Kconfig: Remove all default n/no optionsMichal Simek
default n/no doesn't need to be specified. It is default option anyway. Signed-off-by: Michal Simek <michal.simek@xilinx.com> [trini: Rework FSP_USE_UPD portion] Signed-off-by: Tom Rini <trini@konsulko.com>
2021-08-22gpio: mcp230xx: Introduce new driverSebastian Reichel
Introduce driver for I2C based MCP230xx GPIO chips, which are quite common and already well supported by the Linux kernel. Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-08-02global: Convert simple_strtoul() with decimal to dectoul()Simon Glass
It is a pain to have to specify the value 10 in each call. Add a new dectoul() function and update the code to use it. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-08-02global: Convert simple_strtoul() with hex to hextoul()Simon Glass
It is a pain to have to specify the value 16 in each call. Add a new hextoul() function and update the code to use it. Add a proper comment to simple_strtoul() while we are here. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-07-28Rename GPIO_SUPPORT to GPIOSimon Glass
Rename these options so that CONFIG_IS_ENABLED can be used with them. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-07-23i2c: pcf8575: Add support for 8 bit I2C IO expanders (like pca8574)Lukasz Majewski
This patch add support for using NXP's pca8574 I2C IO expander, which has only 8 IO lines. After this change the .data member's information from struct udevice_id are used to either sent one or two bytes. Moreover, the '_le16' suffix from pcf8575_i2c_{write|read}_le16() functions have been removed as now we also sent 8 bit data. Signed-off-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Heiko Schocher <hs@denx.de>
2021-07-23i2c: pcf8575: Remove not used members of pcf8575_chip structureLukasz Majewski
Those members are not used anymore as ones from gpio_dev_priv structure (when DM_GPIO support is enabled) are used instead. Signed-off-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Heiko Schocher <hs@denx.de>
2021-07-14gpio: Add driver for Nomadik GPIOStephan Gerhold
Nomadik GPIO is a fairly simple GPIO module used in the ST-Ericsson Ux500 SoCs (and some older Nomadik SoCs). It uses registers where each GPIO is represented as a single bit, plus "set" and "clear" registers that allow updating the state without having to read the existing state. The driver implements support for it for use together with DM_GPIO and the existing ste-dbx5x0.dtsi device tree. Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Stephan Gerhold <stephan@gerhold.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
2021-07-14gpio: Drop long unused DB8500 GPIO driverStephan Gerhold
The original U-Boot port for the ST-Ericsson U8500 SoC was dropped in commit 68282f55b846 ("arm: Remove unused ST-Ericsson u8500 arch"). Most of the drivers related to the old port were removed, but the db8500_gpio.c driver was forgotten for some reason. There is no way to select it and it does not compile anymore because of missing headers, so let's just remove it. The new port for U8500 introduced in commit 689088f9dae8 ("arm: Add support for ST-Ericsson U8500 SoC") fully embraces the new Driver Model and device trees where possible, so this is preparation to add a new, simplified GPIO driver based on DM_GPIO. Signed-off-by: Stephan Gerhold <stephan@gerhold.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
2021-07-07arm: Remove spear600 boards and the rest of SPEAr supportTom Rini
These boards have not been converted to CONFIG_DM_USB by the deadline and is also missing conversion to CONFIG_DM. Remove them. As this is the last of the SPEAr platforms, so remove the rest of the remaining support as well. Cc: Vipin Kumar <vipin.kumar@st.com> Signed-off-by: Tom Rini <trini@konsulko.com>
2021-07-01Merge tag 'xilinx-for-v2021.10' of ↵Tom Rini
https://source.denx.de/u-boot/custodians/u-boot-microblaze into next Xilinx changes for v2021.10 clk: - Add driver for Xilinx Clocking Wizard IP fdt: - Also record architecture in /fit-images net: - Fix plat/priv data handling in axi emac - Add support for 10G/25G speeds pca953x: - Add missing dependency on i2c serial: - Fix dependencies for DEBUG uart for pl010/pl011 - Add setconfig option for cadence serial driver watchdog: - Add cadence wdt expire now function zynq: - Update DT bindings to reflect the latest state and descriptions zynqmp: - Update DT bindings to reflect the latest state and descriptions - SPL: Add support for ECC DRAM initialization - Fix R5 core 1 handling logic - Enable firmware driver for mini configurations - Enable secure boot, regulators, wdt - Add support xck devices and 67dr - Add psu init for sm/smk-k26 SOMs - Add handling for MMC seq number via mmc_get_env_dev() - Handle reserved memory locations - Add support for u-boot.itb generation for secure OS - Handle BL32 handoffs for secure OS - Add support for 64bit addresses for u-boot.its generation - Change eeprom handling via nvmem aliases
2021-06-24gpio: renesas: Handle R8A779A0 V3U INEN registerMarek Vasut
The R8A779A0 V3U GPIO block has additional "General Input Enable" INEN register. Add new R8A779A0 compatible string with a new quirk and also a handler for this quirk which toggles the INEN register in the right place. INEN register handling is based on "gpio: renesas: Add R8A779A0 V3U support" by Hai Pham <hai.pham.ud@renesas.com> Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
2021-06-23gpio: pca953x: Add missing i2c dependencyMichal Simek
pca953x also depends on i2c that's why add dependency to Kconfig. Where GPIO is enabled but I2C compilation error pops up. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2021-05-21gpio: renesas: Pass struct udevice to rcar_gpio_set_direction()Marek Vasut
Pass struct udevice to rcar_gpio_set_direction() in preparation of quirk handling in rcar_gpio_set_direction(). No functional change. Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
2021-05-04dm: gpio: Fix gpio_get_list_count failing with livetreeSean Anderson
of_parse_phandle_with_args (called by dev_read_phandle_with_args) does not support getting the length of a phandle list by using the index -1. Instead, use dev_count_phandle_with_args which supports exactly this use-case. Fixes: 8558217153 ("gpio: Convert to use APIs which support live DT") Signed-off-by: Sean Anderson <sean.anderson@seco.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-04-19gpio: atmel_pio4: add support for sama7g5 pio4 version with 5 banksEugen Hristev
Add support for sama7g5 pinctrl variant, with 5 banks with a degraded 8 line only 5th bank. Based on Linux Kernel implementation. Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
2021-04-12gpio: Drop dm_gpio_set_dir()Simon Glass
This function is not used. Drop it. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-27x86: Probe device if needed in intel_gpio_xlate()Simon Glass
The Intel GPIO binding allows GPIOs to be globally numbered, so that it does not matter which GPIO bank is specified in the device tree. This is convenient and avoid confusion since the banks do not have the same number of GPIOs and the numbering is not sequential. The GPIO uclass ensures that the device mentioned in the devicetree binding is probed. It is fine for the driver to update gpio_desc to point to a different driver, but this may not have been probed. If it has not been, then it cannot be claimed since there is no uclass data. We could handle this in the GPIO uclass but so far it is an unusual situation so it is probably not worth the extra code. Handle this case in the GPIO driver by probing the selected device if necessary. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-03-15Merge tag 'v2021.04-rc4' into nextTom Rini
Prepare v2021.04-rc4
2021-03-05gpio: mpc8xxx: Support controller register physical address beyond 32-bitBin Meng
dev_read_addr_size_index() returns fdt_addr_t which might be a 64-bit physical address. This might be true for some 85xx SoCs whose CCSBAR is mapped beyond 4 GiB. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
2021-03-03gpio: Add a way to read 3-way strapping pinsSimon Glass
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>
2021-03-03gpio: Define the log category in the uclassSimon Glass
This uses log_debug(), etc. but does not define the category. Fix this. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-03-03gpio: sandbox: Track whether a GPIO is drivenSimon Glass
Add a new flag to keep track of whether sandbox is driving the pin, or whether it is expecting an input signal. If it is driving, then the value of the pin is the value being driven (0 or 1). If not driving, then we consider the value 0, since we don't currently handle things like pull-ups yet. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-03gpio: x86: Drop the deprecated methods in intel_gpioSimon Glass
We don't need to implement direction_input() and direction_output() anymore. Drop them and use update_flags() instead. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-03-03gpio: Use an 'ops' variable everywhereSimon Glass
Update this driver to use the common method of putting the driver operations in an 'ops' variable install of calling gpio_get_ops() repeatedly. Make it const since operations do not change. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-03gpio: Replace direction_input() and direction_output()Simon Glass
The new update_flags() method is more flexible since it allows the driver to see the full flags all at once. Use that in preference to these two functions. Add comments to that effect. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-03dm: gpio: Add a way to update flagsSimon Glass
It is convenient to be able to adjust some of the flags for a GPIO while leaving others alone. Add a function for this. Update dm_gpio_set_dir_flags() to make use of this. Also update dm_gpio_set_value() to use this also, since this allows the open-drain / open-source features to be implemented directly in the driver, rather than using the uclass workaround. Update the sandbox tests accordingly. This involves a lot of changes to dm_test_gpio_opendrain_opensource() since we no-longer have the direciion being reported differently depending on the open drain/open source flags. Also update the STM32 drivers to let the uclass handle the active low/high logic. Drop the GPIOD_FLAGS_OUTPUT() macro which is no-longer used. Signed-off-by: Simon Glass <sjg@chromium.org> Tested-by: Kory Maincent <kory.maincent@bootlin.com> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Tested-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Tested-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-03gpio: sandbox: Make sandbox_gpio_set_flags() set all flagsSimon Glass
Allow this function to see all flags, including the internal sandbox ones. This allows the tests to fully control the behaviour of the driver. To make this work, move the setting of GPIOD_EXT_HIGH -to where the flags are updated via driver model, rather than the sandbox 'back door'. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-03gpio: sandbox: Fully separate pin value from output valueSimon Glass
At present we have the concept of a pin's external value. This is what is used when getting the value of a pin. But we still set the GPIOD_IS_OUT_ACTIVE flag when changing the value. This is not actually correct, since if the pin changes from output to input, the external value need not change. Adjust the logic for this difference. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-03gpio: sandbox: Use a separate flag for the valueSimon Glass
At present with the sandbox GPIO driver it is not possible to change the value of GPIOD_IS_OUT_ACTIVE unless the GPIO is an output. This makes it hard to test changing the flags since we need to be aware of the internal workings of the driver. The feature is designed to aid testing. Split this feature out into a separate sandbox-specific flag, so that the flags can change unimpeded. This will make it easier to allow updating the flags in a future patch. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-03-03gpio: sandbox: Rename GPIO dir_flags to flagsSimon Glass
Adjust the terminology in this driver to reflect that fact that all flags are handled, not just direction flags. Create a new access function to get the full GPIO state, not just the direction flags. Drop the static invalid_dir_flags since we can rely on a segfault if something is wrong. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-03gpio: Rename dm_gpio_get_dir_flags() to dm_gpio_get_flags()Simon Glass
This function can be used to get any flags, not just direction flags. Rename it to avoid confusion. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
2021-03-03dm: gpio: Rename get_dir_flags() method to get_flags()Simon Glass
It is more useful to be able to read all the flags, not just the direction ones. In fact this is what the STM32 driver does. Update the method name to reflect this. Tweak the docs a little and use 'flagsp' as the return argument, as is common in driver model, to indicate it returns a value. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
2021-03-03dm: gpio: Rename set_dir_flags() method to update_flags()Simon Glass
The current method is a misnomer since it is also used (e.g. by stm32) to update pull settings and open source/open drain. Rename it and expand the documentation to cover a few more details. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Pratyush Yadav <p.yadav@ti.com> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-03-03gpio: Disable functions not used with of-platdataSimon Glass
These functions use devicetree and cannot work with of-platdata, which has no runtime devicetree. If they are used, the current linker error is confusing, since it talks about missing functions in the bowels of driver model. Avoid compiling these functions at all with of-platdata, so that a straightforward link error points to the problem. Series-changes; 3 - Fix 'wprl' typo Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
2021-02-15Merge branch '2021-02-02-drop-asm_global_data-when-unused'Tom Rini
- Merge the patch to take <asm/global_data.h> out of <common.h>
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