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* dm: adc: imx93-adc depends on ADC (fix boot)Sébastien Szymanski2023-10-181-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | The i.MX93 11x11 EVK fails to boot with following error: Model: NXP i.MX93 11X11 EVK board DRAM: 2 GiB Error binding driver 'imx93-adc': -96 Some drivers failed to bind Error binding driver 'simple_bus': -96 Some drivers failed to bind Error binding driver 'simple_bus': -96 Some drivers failed to bind initcall sequence 00000000fffb8f28 failed at call 000000008021e0d4 (err=-96) ### ERROR ### Please RESET the board ### That's because since commit e7ff54d96303 ("imx93_evk: defconfig: add adc support") CONFIG_ADC_IMX93 is enabled but CONFIG_ADC is not. Fix this by enabling CONFIG_ADC in imx93_11x11_evk_defconfig. Make sure this situation won't happen again in future i.MX93 defconfig by making CONFIG_ADC_IMX93 depend on CONFIG_ADC. Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com> Reviewed-by: Fabio Estevam <festevam@gmail.com>
* common: Drop linux/printk.h from common headerSimon Glass2023-09-245-0/+5
| | | | | | | | | This old patch was marked as deferred. Bring it back to life, to continue towards the removal of common.h Move this out of the common header and include it only where needed. Signed-off-by: Simon Glass <sjg@chromium.org>
* adc: Use regulator_set_enable_if_allowedJonas Karlman2023-08-141-12/+10
| | | | | | | | | | | | | With the commit 4fcba5d556b4 ("regulator: implement basic reference counter") the return value of regulator_set_enable may be EALREADY or EBUSY for fixed/gpio regulators. Change to use the more relaxed regulator_set_enable_if_allowed to continue if regulator already was enabled or disabled. Signed-off-by: Jonas Karlman <jonas@kwiboo.se> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> # rockpro64-rk3399
* dm: adc: add iMX93 ADC supportLuca Ellero2023-07-133-0/+299
| | | | | | | | | | | | | | | | | This commit adds driver for iMX93 ADC. The driver is implemented using driver model and provides ADC uclass's methods for ADC single channel operations: - adc_start_channel() - adc_channel_data() - adc_stop() ADC features: - channels: 4 - resolution: 12-bit Signed-off-by: Luca Ellero <l.ellero@asem.it> Reviewed-by: Haibo Chen <haibo.chen@nxp.com>
* rockchip: adc: rockchip-saradc: use dev_read_addr_ptrJohan Jonker2023-05-061-3/+3
| | | | | | | | | | The fdt_addr_t and phys_addr_t size have been decoupled. A 32bit CPU can expext 64-bit data from the device tree parser, so use dev_read_addr_ptr in the rockchip-saradc.c file. As we are there also streamline the error response to -EINVAL on return. Signed-off-by: Johan Jonker <jbx6244@gmail.com> Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
* adc: stm32mp15: add calibration supportOlivier Moysan2023-01-121-18/+116
| | | | | | | | | | | | Add support of offset and linear calibration for STM32MP15. The calibration is performed once at probe. The ADC is set in power on state for calibration. It remains in this state after calibration, to give to the kernel the opportunity to retrieve calibration data, directly from the ADC. Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
* sandbox: Finish migration to KconfigTom Rini2022-12-221-1/+1
| | | | | | | | | | Stop using CONFIG_SANDBOX_ARCH and use CONFIG_SANDBOX instead. For the SPI related defines, set them directly in Kconfig. This now empties arch/sandbox/include/asm/config.h. Cc: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* adc: stm32mp15: add support of generic channels bindingOlivier Moysan2022-12-071-6/+45
| | | | | | | | | | Add support of generic IIO channels binding: ./devicetree/bindings/iio/adc/adc.yaml Keep support of st,adc-channels for backward compatibility. Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
* adc: stm32mp15: split channel init into several routinesOlivier Moysan2022-12-071-10/+34
| | | | | | | | | | Split stm32_adc_chan_of_init channel initialization function into several routines to increase readability and prepare channel generic binding handling. Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com> Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
* adc: meson-saradc: add AXG variantVyacheslav Bocharov2022-04-251-0/+2
| | | | | | | | | Add support for the SARADC variant found on the AXG SoCs family. Signed-off-by: Vyacheslav Bocharov <adeep@lexina.in> Acked-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Link: https://lore.kernel.org/r/20220424082159.757622-5-adeep@lexina.in
* adc: rockchip-saradc: add support for getting reference voltage valuePeter Cai2022-04-181-0/+21
| | | | | | | | | | | | | | | | | Mirroring commit 97ab802aa36f ("adc: meson-saradc: add support for getting reference voltage value") for meson-saradc, this adds support for getting the "vref-supply" regulator and register it as the ADC's reference voltage regulator, so clients can translate sampled ADC values to voltage. Signed-off-by: Peter Cai <peter@typeblog.net> Reviewed-by: John Keeping <john@metanate.com> Tested-by: John Keeping <john@metanate.com> Cc: Simon Glass <sjg@chromium.org> Cc: Philipp Tomsich <philipp.tomsich@vrull.eu> Cc: Kever Yang <kever.yang@rock-chips.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
* rockchip: saradc: remove double semi-colonGiulio Benetti2022-03-181-1/+1
| | | | | | | | | Remove double semi-colon that has been forgotten while adding the driver. This is only a style fix since it doesn't change the functionality of the driver. Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com> Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
* dm: define LOG_CATEGORY for all uclassPatrick Delaunay2021-07-061-0/+2
| | | | | | | | Define LOG_CATEGORY for all uclass to allow filtering with log command. Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* adc: meson-saradc: add support for getting reference voltage valueMarek Szyprowski2021-02-181-0/+21
| | | | | | | | | | Add support for getting the 'vref-supply' regulator and register it as ADC's reference voltage regulator, so clients can translate sampled ADC values to the voltage. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
* Merge tag 'u-boot-amlogic-20210112' of ↵Tom Rini2021-01-131-3/+8
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | https://gitlab.denx.de/u-boot/custodians/u-boot-amlogic - sync amlogic GX & AXG DT to Linux 5.10 - Add new MESON_EE driver support for GXBB & AXG - Add support for Libretech-CC v2, Wetek Core2, Beelink GT-King/Pro boards - add driver for TDO tl070wsh30 panel driver - meson: isolate loading of socinfo - Add soc_rev to environment - Enable G12A support for saradc - Add correct mmcdev on VIM3(L) & Odroid-N2(C4) - Read MAC from fuses for VIM3 & VIM3L boards
| * adc: meson-saradc: use correct printf codeHeinrich Schuchardt2021-01-111-1/+1
| | | | | | | | | | | | | | | | For printing unsigned int we have to use %u not %d. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Acked-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
| * adc: meson-saradc: skip hardware init only if ADC is enabledMarek Szyprowski2021-01-111-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | The driver skips hardware initialization if it is already configured by the earlier bootloader stage (BL30). Skip the initialization only if the hardware is really initialized and enabled. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Tested-by: Jaehoon Chung <jh80.chung@samsung.com> Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
| * adc: meson-saradc: add G12A variantMarek Szyprowski2021-01-111-0/+2
| | | | | | | | | | | | | | | | | | | | Add support for the SARADC variant found on the G12A SoCs family. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Tested-by: Jaehoon Chung <jh80.chung@samsung.com> Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
* | dm: treewide: Rename ..._platdata variables to just ..._platSimon Glass2020-12-131-10/+10
| | | | | | | | | | | | | | Try to maintain some consistency between these variables by using _plat as a suffix for them. Signed-off-by: Simon Glass <sjg@chromium.org>
* | dm: treewide: Rename ofdata_to_platdata() to of_to_plat()Simon Glass2020-12-134-8/+8
| | | | | | | | | | | | | | This name is far too long. Rename it to remove the 'data' bits. This makes it consistent with the platdata->plat rename. Signed-off-by: Simon Glass <sjg@chromium.org>
* | dm: treewide: Rename 'platdata' variables to just 'plat'Simon Glass2020-12-136-24/+24
| | | | | | | | | | | | | | | | | | | | We use 'priv' for private data but often use 'platdata' for platform data. We can't really use 'pdata' since that is ambiguous (it could mean private or platform data). Rename some of the latter variables to end with 'plat' for consistency. Signed-off-by: Simon Glass <sjg@chromium.org>
* | dm: treewide: Rename auto_alloc_size members to be shorterSimon Glass2020-12-137-7/+7
|/ | | | | | | | | | | | This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
* adc: Drop dm.h header fileSimon Glass2020-08-033-2/+4
| | | | | | | | | This header file should not be included in other header files. Remove it and use a forward declaration instead. Drop the common.h inclusion also. Signed-off-by: Simon Glass <sjg@chromium.org>
* treewide: convert (void *)devfdt_get_addr() to dev_read_addr_ptr()Masahiro Yamada2020-07-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Use the _ptr suffixed variant instead of casting. Also, convert it to dev_read_addr_ptr(), which is safe to CONFIG_OF_LIVE. One curious part is an error check like follows in drivers/watchdog/omap_wdt.c: priv->regs = (struct wd_timer *)devfdt_get_addr(dev); if (!priv->regs) return -EINVAL; devfdt_get_addr() returns FDT_ADDR_T_NONE (i.e. -1) on error. So, this code does not catch any error in DT parsing. dev_read_addr_ptr() returns NULL on error, so this error check will work. I generated this commit by the following command: $ find . -name .git -prune -o -name '*.[ch]' -type f -print | \ xargs sed -i -e 's/([^*)]*\*)devfdt_get_addr(/dev_read_addr_ptr(/' I manually fixed drivers/usb/host/ehci-mx6.c Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* Revert "Merge tag 'dm-pull-20jul20' of git://git.denx.de/u-boot-dm"Tom Rini2020-07-241-1/+1
| | | | | | | | | | This reverts commit 5d3a21df6694ebd66d5c34c9d62a26edc7456fc7, reversing changes made to 56d37f1c564107e27d873181d838571b7d7860e7. Unfortunately this is causing CI failures: https://travis-ci.org/github/trini/u-boot/jobs/711313649 Signed-off-by: Tom Rini <trini@konsulko.com>
* treewide: convert (void *)devfdt_get_addr() to dev_read_addr_ptr()Masahiro Yamada2020-07-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Use the _ptr suffixed variant instead of casting. Also, convert it to dev_read_addr_ptr(), which is safe to CONFIG_OF_LIVE. One curious part is an error check like follows in drivers/watchdog/omap_wdt.c: priv->regs = (struct wd_timer *)devfdt_get_addr(dev); if (!priv->regs) return -EINVAL; devfdt_get_addr() returns FDT_ADDR_T_NONE (i.e. -1) on error. So, this code does not catch any error in DT parsing. dev_read_addr_ptr() returns NULL on error, so this error check will work. I generated this commit by the following command: $ find . -name .git -prune -o -name '*.[ch]' -type f -print | \ xargs sed -i -e 's/([^*)]*\*)devfdt_get_addr(/dev_read_addr_ptr(/' I manually fixed drivers/usb/host/ehci-mx6.c Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* common: Drop linux/bitops.h from common headerSimon Glass2020-05-184-0/+4
| | | | | | Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
* common: Drop linux/delay.h from common headerSimon Glass2020-05-183-0/+3
| | | | | | Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: Create a new header file for 'compat' featuresSimon Glass2020-02-052-0/+2
| | | | | | | | | | | | At present dm/device.h includes the linux-compatible features. This requires including linux/compat.h which in turn includes a lot of headers. One of these is malloc.h which we thus end up including in every file in U-Boot. Apart from the inefficiency of this, it is problematic for sandbox which needs to use the system malloc() in some files. Move the compatibility features into a separate header file. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: Require users of devres to include the headerSimon Glass2020-02-051-0/+1
| | | | | | | | | | At present devres.h is included in all files that include dm.h but few make use of it. Also this pulls in linux/compat which adds several more headers. Drop the automatic inclusion and require files to include devres themselves. This provides a good indication of which files use devres. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Anatolij Gustschin <agust@denx.de>
* adc: stm32: Fix warnings when compiling with W=1Patrick Delaunay2019-07-121-1/+2
| | | | | | | | | | | | | | | | This patch solves the following warnings: drivers/adc/stm32-adc-core.c: In function 'stm32h7_adc_clk_sel': warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < ARRAY_SIZE(stm32h7_adc_ckmodes_spec); i++) { ^ warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < ARRAY_SIZE(stm32h7_adc_ckmodes_spec); i++) { ^ Signed-off-by: Patrice Chotard <patrice.chotard@st.com> Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com> Acked-by: Fabrice Gasnier <fabrice.gasnier@st.com>
* adc: stm32-adc: Fix warnings when compiling with W=1Patrick Delaunay2019-07-121-6/+7
| | | | | | | | | | | | | This patch solves the following warnings: drivers/adc/stm32-adc.c: In function 'stm32_adc_chan_of_init': warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (num_channels > adc->cfg->max_channels) { ^ Signed-off-by: Patrice Chotard <patrice.chotard@st.com> Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com> Acked-by: Fabrice Gasnier <fabrice.gasnier@st.com>
* adc: exynos-adc: Fix wrong bit operation used to stop the ADCKrzysztof Kozlowski2019-03-111-1/+1
| | | | | | | | | When stopping the ADC_V2_CON1_STC_EN should be cleared. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by: Lukasz Majewski <lukma@denx.de> Tested-by: Anand Moon <linux.amoon@gmail.com> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
* dm: adc: add uclass's mask and conversion helpersFabrice Gasnier2018-11-201-0/+37
| | | | | | | | | Add two functions to ADC uclass's: - adc_raw_to_uV() to ease ADC raw value conversion to microvolts - adc_channel_mask() to get channels on consumer side Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* drivers: cosmetic: Convert SPDX license tags to Linux Kernel stylePatrick Delaunay2018-10-281-2/+1
| | | | | | | | | Complete in the drivers directory the work started with commit 83d290c56fab ("SPDX: Convert all of our single license tags to Linux Kernel style"). Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
* adc: Add driver for STM32 ADCFabrice Gasnier2018-08-035-0/+534
| | | | | | | | | | | | | This patch adds support for STMicroelectronics STM32 ADC (analog to digital converter). It's originally based on Linux kernel v4.18-rcs drivers/iio/adc/stm32-adc*. It's composed of: - core driver (UCLASS_SIMPLE_BUS) manages common resources (clk, regu). - child drivers (UCLASS_ADC) declare each ADC, channels and handle conversions. This driver currently supports STM32H7 and STM32MP1 ADC. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* dm: adc: uclass: get reference regulator onceFabrice Gasnier2018-08-031-18/+17
| | | | | | | | | | | | | | | device_get_supply_regulator() only needs to be called once. But each time there's call to adc_vxx_value() for instance, it calls adc_vxx_platdata_update() -> device_get_supply_regulator(). So, move device_get_supply_regulator() to pre_probe() routine. This also allows vdd_supply/vss_supply to be provided directly from uc_pdata, e.g dt-binding variant like stm32-adc provide its own 'vref-supply'. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* adc: meson-saradc: fix regmap_init_mem callNeil Armstrong2018-06-191-1/+1
| | | | | | | | The SARADC driver was merged after the following commit : commit d35812368a59 ("regmap: change regmap_init_mem() to take ofnode instead udevice") Thus breaking build, this patch fixes the regmap_init_mem accordingly. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
* adc: add Amlogic Meson SAR ADC driverNeil Armstrong2018-05-083-0/+734
| | | | | | | | | | | | | This patch adds the driver for the Amlogic Meson Successive Approximation Register (SAR) A/D Converter based on the Linux IIO driver thanks to the great work of Martin Blumenstingl. The driver has been adapted to U-Boot and the ADC UClass. This patch depends on the regmap "regmap: add regmap_update_bits() helper" patch and has been tested using the newly introducted "adc" CLI command in the "cmd: add ADC cli commands" patch. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
* SPDX: Convert all of our single license tags to Linux Kernel styleTom Rini2018-05-074-8/+4
| | | | | | | | | | | | | | | | | | | | When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
* Remove unnecessary instances of DECLARE_GLOBAL_DATA_PTRTom Rini2018-04-271-2/+0
| | | | | | | | We have a large number of places where while we historically referenced gd in the code we no longer do, as well as cases where the code added that line "just in case" during development and never dropped it. Signed-off-by: Tom Rini <trini@konsulko.com>
* treewide: replace with error() with pr_err()Masahiro Yamada2017-10-044-12/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | U-Boot widely uses error() as a bit noisier variant of printf(). This macro causes name conflict with the following line in include/linux/compiler-gcc.h: # define __compiletime_error(message) __attribute__((error(message))) This prevents us from using __compiletime_error(), and makes it difficult to fully sync BUILD_BUG macros with Linux. (Notice Linux's BUILD_BUG_ON_MSG is implemented by using compiletime_assert().) Let's convert error() into now treewide-available pr_err(). Done with the help of Coccinelle, excluing tools/ directory. The semantic patch I used is as follows: // <smpl> @@@@ -error +pr_err (...) // </smpl> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Simon Glass <sjg@chromium.org> [trini: Re-run Coccinelle] Signed-off-by: Tom Rini <trini@konsulko.com>
* dm: adc: Add driver for Rockchip SARADCDavid Wu2017-10-013-0/+193
| | | | | | | | | | The ADC can support some channels signal-ended some bits Successive Approximation Register (SAR) A/D Converter, like 6-channel and 10-bit. It converts the analog input signal into some bits binary digital codes. Signed-off-by: David Wu <david.wu@rock-chips.com> Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
* dm: adc: Convert uclass to livetreeSimon Glass2017-06-011-8/+6
| | | | | | Update the adc uclass to support a live device tree. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Rename dev_addr..() functionsSimon Glass2017-06-011-1/+1
| | | | | | | | | | | | | | | | | | | These support the flat device tree. We want to use the dev_read_..() prefix for functions that support both flat tree and live tree. So rename the existing functions to avoid confusion. In the end we will have: 1. dev_read_addr...() - works on devices, supports flat/live tree 2. devfdt_get_addr...() - current functions, flat tree only 3. of_get_address() etc. - new functions, live tree only All drivers will be written to use 1. That function will in turn call either 2 or 3 depending on whether the flat or live tree is in use. Note this involves changing some dead code - the imx_lpi2c.c file. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: core: Replace of_offset with accessorSimon Glass2017-02-081-2/+2
| | | | | | | | | At present devices use a simple integer offset to record the device tree node associated with the device. In preparation for supporting a live device tree, which uses a node pointer instead, refactor existing code to access this field through an inline function. Signed-off-by: Simon Glass <sjg@chromium.org>
* sandbox: add ADC driverPrzemyslaw Marczak2015-11-023-0/+184
| | | | | | | | | | | | This commit adds implementation of Sandbox ADC device emulation. The device provides: - single and multi-channel conversion - 4 channels with predefined conversion output data - 16-bit resolution Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Cc: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
* dm: adc: add Exynos54xx compatible ADC driverPrzemyslaw Marczak2015-11-023-0/+155
| | | | | | | | | | | | | | | | | | | | | | | | This commit adds driver for Exynos54xx ADC subsystem. The driver is implemented using driver model, amd provides ADC uclass's methods for ADC single channel operations: - adc_start_channel() - adc_channel_data() - adc_stop() The basic parameters of ADC conversion, are: - sample rate: 600KSPS - output the data as average of 8 time conversion ADC features: - sample rate: 600KSPS - resolution: 12-bit - channels: 10 (analog multiplexer) Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Cc: Minkyu Kang <mk7.kang@samsung.com> Cc: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
* dm: adc: add simple ADC uclass implementationPrzemyslaw Marczak2015-11-023-0/+429
This commit adds: - new uclass id: UCLASS_ADC - new uclass driver: drivers/adc/adc-uclass.c The new uclass's API allows for ADC operation on: * single-channel with channel selection by a number * multti-channel with channel selection by bit mask ADC uclass's functions: * single-channel: - adc_start_channel() - start channel conversion - adc_channel_data() - get conversion data - adc_channel_single_shot() - start/get conversion data * multi-channel: - adc_start_channels() - start selected channels conversion - adc_channels_data() - get conversion data - adc_channels_single_shot() - start/get conversion data for channels selected by bit mask * general: - adc_stop() - stop the conversion - adc_vdd_value() - positive reference Voltage value with polarity [uV] - adc_vss_value() - negative reference Voltage value with polarity [uV] - adc_data_mask() - conversion data bit mask The device tree can provide below constraints/properties: - vdd-polarity-negative: if true: Vdd = vdd-microvolts * (-1) - vss-polarity-negative: if true: Vss = vss-microvolts * (-1) - vdd-supply: phandle to Vdd regulator's node - vss-supply: phandle to Vss regulator's node And optional, checked only if the above corresponding, doesn't exist: - vdd-microvolts: positive reference Voltage [uV] - vss-microvolts: negative reference Voltage [uV] Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Cc: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
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