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path: root/drivers/iio/adc/sc27xx_adc.c
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2022-06-16iio: adc: sc27xx_adc: Re-use generic struct u32_fractAndy Shevchenko1-8/+7
Instead of a pair of u32 re-use generic struct u32_fract. No functional changes intended. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Cixi Geng <cixi.geng1@unisoc.com> Link: https://lore.kernel.org/r/20220530180910.2533-1-andriy.shevchenko@linux.intel.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2022-04-28iio: adc: sc27xx: add support for PMIC sc2730Cixi Geng1-0/+116
sc2730 is the product of sc27xx series. Co-developed-by: Yuming Zhu <yuming.zhu1@unisoc.com> Signed-off-by: Yuming Zhu <yuming.zhu1@unisoc.com> Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com> Link: https://lore.kernel.org/r/20220419142458.884933-8-gengcixi@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2022-04-28iio: adc: sc27xx: add support for PMIC sc2720 and sc2721Cixi Geng1-2/+201
sc2720 and sc2721 is the product of sc27xx series. Co-developed-by: Yuming Zhu <yuming.zhu1@unisoc.com> Signed-off-by: Yuming Zhu <yuming.zhu1@unisoc.com> Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com> Link: https://lore.kernel.org/r/20220419142458.884933-7-gengcixi@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2022-04-28iio: adc: sc27xx: refactor some functions for support more PMiCsCixi Geng1-16/+40
Refactor the common adc_nvmem_cell_calib_data,adc_to_volt and call these in the origin sc27xx_adc_scale_calibration,sc27xx_adc_to_volt Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com> Link: https://lore.kernel.org/r/20220419142458.884933-6-gengcixi@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2022-04-28iio: adc: sc27xx: structure adjustment and optimizationCixi Geng1-15/+76
Introduce one variant device data structure to be compatible with SC2731 PMIC since it has different scale and ratio calculation and so on. also rename the SC27xx to SC2731 for some definition and function. Co-developed-by: Yuming Zhu <yuming.zhu1@unisoc.com> Signed-off-by: Yuming Zhu <yuming.zhu1@unisoc.com> Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com> Link: https://lore.kernel.org/r/20220419142458.884933-5-gengcixi@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2022-04-28iio: adc: sc27xx: Fine tune the scale calibration valuesCixi Geng1-8/+8
Small adjustment the scale calibration value for the sc2731, use new name sc2731_[big|small]_scale_graph_calib, and remove the origin [big|small]_scale_graph_calib struct for unused. Fixes: 8ba0dbfd07a35 (iio: adc: sc27xx: Add ADC scale calibration) Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com> Link: https://lore.kernel.org/r/20220419142458.884933-4-gengcixi@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2022-04-28iio: adc: sc27xx: fix read big scale voltage not rightCixi Geng1-2/+2
Fix wrong configuration value of SC27XX_ADC_SCALE_MASK and SC27XX_ADC_SCALE_SHIFT by spec documetation. Fixes: 5df362a6cf49c (iio: adc: Add Spreadtrum SC27XX PMICs ADC support) Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com> Reviewed-by: Baolin Wang <baolin.wang7@gmail.com> Link: https://lore.kernel.org/r/20220419142458.884933-3-gengcixi@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-05-17iio: adc: Add missing MODULE_DEVICE_TABLEChunyan Zhang1-0/+1
MODULE_DEVICE_TABLE is used to extract the device information out of the driver and builds a table when being compiled. If using this macro, kernel can find the driver if available when the device is plugged in, and then loads that driver and initializes the device. Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-01-10iio: sc27xx_adc: Use DIV_ROUND_CLOSEST() instead of open-coding itLars-Peter Clausen1-1/+1
Use DIV_ROUND_CLOSEST() instead of open-coding it. This makes it more clear what is going on for the casual reviewer. Generated using the following the Coccinelle semantic patch. // <smpl> @@ expression x, y; @@ -((x) + ((y) / 2)) / (y) +DIV_ROUND_CLOSEST(x, y) // </smpl> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Chunyan Zhang <zhang.lyra@gmail.com> Link: https://lore.kernel.org/r/20201222191618.3433-1-lars@metafoo.de Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-06-14iio: remove explicit IIO device parent assignmentAlexandru Ardelean1-1/+0
This patch applies the semantic patch: @@ expression I, P, SP; @@ I = devm_iio_device_alloc(P, SP); ... - I->dev.parent = P; It updates 302 files and does 307 deletions. This semantic patch also removes some comments like '/* Establish that the iio_dev is a child of the i2c device */' But this is is only done in case where the block is left empty. The patch does not seem to cover all cases. It looks like in some cases a different variable is used in some cases to assign the parent, but it points to the same reference. In other cases, the block covered by ... may be just too big to be covered by the semantic patch. However, this looks pretty good as well, as it does cover a big bulk of the drivers that should remove the parent assignment. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-10-13iio: adc: sc27xx: Use devm_hwspin_lock_request_specific() to simplify codeBaolin Wang1-15/+1
Change to use devm_hwspin_lock_request_specific() to help to simplify the cleanup code for drivers requesting one hwlock. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-08-18iio: adc: sc27xx: Change to polling mode to read dataFreeman Liu1-54/+27
On Spreadtrum platform, the headphone will read one ADC channel multiple times to identify the headphone type, and the headphone identification is sensitive of the ADC reading time. And we found it will take longer time to reading ADC data by using interrupt mode comparing with the polling mode, thus we should change to polling mode to improve the efficiency of reading data, which can identify the headphone type successfully. Signed-off-by: Freeman Liu <freeman.liu@unisoc.com> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-08-05iio: Remove dev_err() usage after platform_get_irq()Stephen Boyd1-3/+1
We don't need dev_err() messages when platform_get_irq() fails now that platform_get_irq() prints an error message itself when something goes wrong. Let's remove these prints with a simple semantic patch. // <smpl> @@ expression ret; struct platform_device *E; @@ ret = ( platform_get_irq(E, ...) | platform_get_irq_byname(E, ...) ); if ( \( ret < 0 \| ret <= 0 \) ) { ( -if (ret != -EPROBE_DEFER) -{ ... -dev_err(...); -... } | ... -dev_err(...); ) ... } // </smpl> While we're here, remove braces on if statements that only have one statement (manually). Cc: Jonathan Cameron <jic23@kernel.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net> Cc: linux-iio@vger.kernel.org Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-07-27iio: adc: sc27xx: Replace devm_add_action() followed by failure action with ↵Fuqian Huang1-4/+2
devm_add_action_or_reset() devm_add_action_or_reset() is introduced as a helper function which internally calls devm_add_action(). If devm_add_action() fails then it will execute the action mentioned and return the error code. This reduce source code size (avoid writing the action twice) and reduce the likelyhood of bugs. Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-07-27iio: adc: sc27xx: Introduce local variable 'struct device *dev'Fuqian Huang1-20/+21
Introduce local variable 'struct device *dev' and use it instead of dereferencing it repeatly. Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-11-16iio: adc: sc27xx: Add ADC data conversion timeoutFreeman Liu1-1/+11
Sometimes the ADC controller met some problems, and it will not complete the data conversion, that will can not wake up the read process any more to block users. So we should add one maximum conversion time to avoid this issue. Signed-off-by: Freeman Liu <freeman.liu@unisoc.com> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-09-02iio: adc: sc27xx: Add ADC scale calibrationBaolin Wang1-3/+71
This patch adds support to read calibration values from the eFuse controller to calibrate the ADC channel scales, which can make ADC sample data more accurate. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-09-02iio: adc: sc27xx: Add raw data supportBaolin Wang1-35/+45
The headset device will use channel 20 of ADC controller to detect events, but it needs the raw ADC data to do conversion according to its own formula. Thus we should configure the channel mask separately and configure channel 20 as IIO_CHAN_INFO_RAW, as well as adding raw data read support. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-06-30iio: adc: Add Spreadtrum SC27XX PMICs ADC supportFreeman Liu1-0/+522
The Spreadtrum SC27XX PMICs ADC controller contains 32 channels, which is used to sample voltages with 12 bits conversion. [Baolin Wang did lots of improvements] Signed-off-by: Freeman Liu <freeman.liu@spreadtrum.com> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
generated by cgit v1.2.3 (git 2.39.0) at 2025-03-18 05:05:41 +0300