mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![Greg Kroah-Hartman](/assets/img/avatar_default.png)
adi,ad7949 * Fix a wrong bitmask that could lead to an undefined bit being included. adi,adi-axi-adc * Add missing Kconfig dependencies adi,adis16400 * Wrong error code handling in adis16400 that could lead to failed probe. hid-sensor-humidity, temperature * Fix alignment and space for timestamp channel. hid-sensor-prox * Fix an issue with handling of exponent on the channel scaling. invensense,mpu3050 * Fix a hole in error handling. qcom,spi-vadc * Correct scaling st,ab8500-adc * Fix wrong scaling (by factor of 1000) st,stm32-adc * Add missing HAS_IOMEM dependency st,stm32-timer-cnt * Report count when running off internal clock * Fix issue with not checking ceiling before trying to write to hardware * Ensure driver doesn't have stashed state which doesn't match hardware by rereading from hardware in a slow path. -----BEGIN PGP SIGNATURE----- iQJFBAABCAAvFiEEbilms4eEBlKRJoGxVIU0mcT0FogFAmBOGa4RHGppYzIzQGtl cm5lbC5vcmcACgkQVIU0mcT0FojkDw//YDGkDIUEsx/je8xBjLevNvMd1+6Hc2TA eKxzQ8ihwJtc8o2ShHuqYdUXvZJIJjtzu9BA/kuEUGE1EmjPZztWGT3mJFwUuA82 Woy9G/NStX6Cy/3z9rMEusGqIKysSWfvIVnEX3zLoyGUpskJYn6QDqifcFBLTyDa uXPSQ0x2sB0wufGxhAMXGAzUClqzcGIFp/VZSaLTYqT1P30WgQ5N2D/epYdVTQHD WbYn+HHP8+74sz2ozj/g5mCG/pE0FB9PyjoCqFz1kRdIm/4K/EGfsBRu4rjVhcNz NEsM+B+54MUcQv0vzop8Ip6J5XEy6zHNIlXT5B0ckxuU46s8vQnAZhtA03jXgWOT JbnonjMMJv/04q3dMbkYxvFpy4mBFlYmsQu+8JUfXMYlCPTHVHbkZhWE36Q7zT63 wMX/yIMYTuNGozBrQkQeymrQpaa8zUlVjwPzkAmMt+w0Bh3mR5XXyxh7EncmevdG ZR8Znd7g0WidaEnXeuFy2sEJwljIGBiUbO2UurWD5EBsFshu9ZC7n9+gS1gaICva dEh2JmdYAq9cB2Enqw7jq8WyIsAmc++M3XXz6prgq1g0tcm/5od7AqeU7AiqPQVX Gxd0YyL4ihGBMcrZLJcB1HxBGv27w7fQzwfxW2e1fa8bPNepUajsyXpRj/iz9vRR x+IiixCgKbw= =L5Yl -----END PGP SIGNATURE----- Merge tag 'iio-fixes-for-5.12a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus Jonathan writes: First set of IIO and counter fixes for the 5.12 cycle adi,ad7949 * Fix a wrong bitmask that could lead to an undefined bit being included. adi,adi-axi-adc * Add missing Kconfig dependencies adi,adis16400 * Wrong error code handling in adis16400 that could lead to failed probe. hid-sensor-humidity, temperature * Fix alignment and space for timestamp channel. hid-sensor-prox * Fix an issue with handling of exponent on the channel scaling. invensense,mpu3050 * Fix a hole in error handling. qcom,spi-vadc * Correct scaling st,ab8500-adc * Fix wrong scaling (by factor of 1000) st,stm32-adc * Add missing HAS_IOMEM dependency st,stm32-timer-cnt * Report count when running off internal clock * Fix issue with not checking ceiling before trying to write to hardware * Ensure driver doesn't have stashed state which doesn't match hardware by rereading from hardware in a slow path. * tag 'iio-fixes-for-5.12a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: iio: gyro: mpu3050: Fix error handling in mpu3050_trigger_handler iio: hid-sensor-temperature: Fix issues of timestamp channel iio: hid-sensor-humidity: Fix alignment issue of timestamp channel counter: stm32-timer-cnt: fix ceiling miss-alignment with reload register counter: stm32-timer-cnt: fix ceiling write max value counter: stm32-timer-cnt: Report count function when SLAVE_MODE_DISABLED iio: adc: ab8500-gpadc: Fix off by 10 to 3 iio:adc:stm32-adc: Add HAS_IOMEM dependency iio: adis16400: Fix an error code in adis16400_initial_setup() iio: adc: adi-axi-adc: add proper Kconfig dependencies iio: adc: ad7949: fix wrong ADC result due to incorrect bit mask iio: hid-sensor-prox: Fix scale not correct issue iio:adc:qcom-spmi-vadc: add default scale to LR_MUX2_BAT_ID channel
937 lines
23 KiB
C
937 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
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*/
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#include <linux/bitops.h>
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#include <linux/completion.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/iio/adc/qcom-vadc-common.h>
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#include <linux/iio/iio.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/math64.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/log2.h>
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#include <dt-bindings/iio/qcom,spmi-vadc.h>
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/* VADC register and bit definitions */
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#define VADC_REVISION2 0x1
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#define VADC_REVISION2_SUPPORTED_VADC 1
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#define VADC_PERPH_TYPE 0x4
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#define VADC_PERPH_TYPE_ADC 8
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#define VADC_PERPH_SUBTYPE 0x5
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#define VADC_PERPH_SUBTYPE_VADC 1
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#define VADC_STATUS1 0x8
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#define VADC_STATUS1_OP_MODE 4
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#define VADC_STATUS1_REQ_STS BIT(1)
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#define VADC_STATUS1_EOC BIT(0)
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#define VADC_STATUS1_REQ_STS_EOC_MASK 0x3
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#define VADC_MODE_CTL 0x40
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#define VADC_OP_MODE_SHIFT 3
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#define VADC_OP_MODE_NORMAL 0
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#define VADC_AMUX_TRIM_EN BIT(1)
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#define VADC_ADC_TRIM_EN BIT(0)
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#define VADC_EN_CTL1 0x46
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#define VADC_EN_CTL1_SET BIT(7)
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#define VADC_ADC_CH_SEL_CTL 0x48
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#define VADC_ADC_DIG_PARAM 0x50
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#define VADC_ADC_DIG_DEC_RATIO_SEL_SHIFT 2
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#define VADC_HW_SETTLE_DELAY 0x51
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#define VADC_CONV_REQ 0x52
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#define VADC_CONV_REQ_SET BIT(7)
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#define VADC_FAST_AVG_CTL 0x5a
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#define VADC_FAST_AVG_EN 0x5b
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#define VADC_FAST_AVG_EN_SET BIT(7)
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#define VADC_ACCESS 0xd0
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#define VADC_ACCESS_DATA 0xa5
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#define VADC_PERH_RESET_CTL3 0xda
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#define VADC_FOLLOW_WARM_RB BIT(2)
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#define VADC_DATA 0x60 /* 16 bits */
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#define VADC_CHAN_MIN VADC_USBIN
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#define VADC_CHAN_MAX VADC_LR_MUX3_BUF_PU1_PU2_XO_THERM
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/**
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* struct vadc_channel_prop - VADC channel property.
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* @channel: channel number, refer to the channel list.
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* @calibration: calibration type.
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* @decimation: sampling rate supported for the channel.
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* @prescale: channel scaling performed on the input signal.
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* @hw_settle_time: the time between AMUX being configured and the
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* start of conversion.
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* @avg_samples: ability to provide single result from the ADC
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* that is an average of multiple measurements.
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* @scale_fn_type: Represents the scaling function to convert voltage
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* physical units desired by the client for the channel.
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*/
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struct vadc_channel_prop {
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unsigned int channel;
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enum vadc_calibration calibration;
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unsigned int decimation;
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unsigned int prescale;
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unsigned int hw_settle_time;
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unsigned int avg_samples;
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enum vadc_scale_fn_type scale_fn_type;
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};
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/**
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* struct vadc_priv - VADC private structure.
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* @regmap: pointer to struct regmap.
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* @dev: pointer to struct device.
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* @base: base address for the ADC peripheral.
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* @nchannels: number of VADC channels.
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* @chan_props: array of VADC channel properties.
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* @iio_chans: array of IIO channels specification.
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* @are_ref_measured: are reference points measured.
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* @poll_eoc: use polling instead of interrupt.
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* @complete: VADC result notification after interrupt is received.
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* @graph: store parameters for calibration.
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* @lock: ADC lock for access to the peripheral.
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*/
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struct vadc_priv {
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struct regmap *regmap;
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struct device *dev;
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u16 base;
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unsigned int nchannels;
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struct vadc_channel_prop *chan_props;
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struct iio_chan_spec *iio_chans;
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bool are_ref_measured;
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bool poll_eoc;
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struct completion complete;
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struct vadc_linear_graph graph[2];
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struct mutex lock;
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};
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static const struct vadc_prescale_ratio vadc_prescale_ratios[] = {
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{.num = 1, .den = 1},
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{.num = 1, .den = 3},
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{.num = 1, .den = 4},
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{.num = 1, .den = 6},
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{.num = 1, .den = 20},
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{.num = 1, .den = 8},
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{.num = 10, .den = 81},
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{.num = 1, .den = 10}
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};
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static int vadc_read(struct vadc_priv *vadc, u16 offset, u8 *data)
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{
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return regmap_bulk_read(vadc->regmap, vadc->base + offset, data, 1);
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}
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static int vadc_write(struct vadc_priv *vadc, u16 offset, u8 data)
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{
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return regmap_write(vadc->regmap, vadc->base + offset, data);
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}
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static int vadc_reset(struct vadc_priv *vadc)
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{
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u8 data;
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int ret;
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ret = vadc_write(vadc, VADC_ACCESS, VADC_ACCESS_DATA);
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if (ret)
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return ret;
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ret = vadc_read(vadc, VADC_PERH_RESET_CTL3, &data);
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if (ret)
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return ret;
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ret = vadc_write(vadc, VADC_ACCESS, VADC_ACCESS_DATA);
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if (ret)
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return ret;
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data |= VADC_FOLLOW_WARM_RB;
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return vadc_write(vadc, VADC_PERH_RESET_CTL3, data);
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}
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static int vadc_set_state(struct vadc_priv *vadc, bool state)
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{
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return vadc_write(vadc, VADC_EN_CTL1, state ? VADC_EN_CTL1_SET : 0);
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}
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static void vadc_show_status(struct vadc_priv *vadc)
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{
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u8 mode, sta1, chan, dig, en, req;
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int ret;
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ret = vadc_read(vadc, VADC_MODE_CTL, &mode);
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if (ret)
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return;
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ret = vadc_read(vadc, VADC_ADC_DIG_PARAM, &dig);
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if (ret)
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return;
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ret = vadc_read(vadc, VADC_ADC_CH_SEL_CTL, &chan);
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if (ret)
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return;
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ret = vadc_read(vadc, VADC_CONV_REQ, &req);
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if (ret)
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return;
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ret = vadc_read(vadc, VADC_STATUS1, &sta1);
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if (ret)
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return;
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ret = vadc_read(vadc, VADC_EN_CTL1, &en);
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if (ret)
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return;
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dev_err(vadc->dev,
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"mode:%02x en:%02x chan:%02x dig:%02x req:%02x sta1:%02x\n",
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mode, en, chan, dig, req, sta1);
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}
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static int vadc_configure(struct vadc_priv *vadc,
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struct vadc_channel_prop *prop)
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{
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u8 decimation, mode_ctrl;
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int ret;
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/* Mode selection */
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mode_ctrl = (VADC_OP_MODE_NORMAL << VADC_OP_MODE_SHIFT) |
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VADC_ADC_TRIM_EN | VADC_AMUX_TRIM_EN;
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ret = vadc_write(vadc, VADC_MODE_CTL, mode_ctrl);
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if (ret)
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return ret;
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/* Channel selection */
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ret = vadc_write(vadc, VADC_ADC_CH_SEL_CTL, prop->channel);
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if (ret)
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return ret;
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/* Digital parameter setup */
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decimation = prop->decimation << VADC_ADC_DIG_DEC_RATIO_SEL_SHIFT;
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ret = vadc_write(vadc, VADC_ADC_DIG_PARAM, decimation);
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if (ret)
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return ret;
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/* HW settle time delay */
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ret = vadc_write(vadc, VADC_HW_SETTLE_DELAY, prop->hw_settle_time);
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if (ret)
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return ret;
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ret = vadc_write(vadc, VADC_FAST_AVG_CTL, prop->avg_samples);
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if (ret)
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return ret;
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if (prop->avg_samples)
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ret = vadc_write(vadc, VADC_FAST_AVG_EN, VADC_FAST_AVG_EN_SET);
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else
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ret = vadc_write(vadc, VADC_FAST_AVG_EN, 0);
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return ret;
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}
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static int vadc_poll_wait_eoc(struct vadc_priv *vadc, unsigned int interval_us)
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{
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unsigned int count, retry;
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u8 sta1;
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int ret;
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retry = interval_us / VADC_CONV_TIME_MIN_US;
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for (count = 0; count < retry; count++) {
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ret = vadc_read(vadc, VADC_STATUS1, &sta1);
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if (ret)
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return ret;
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sta1 &= VADC_STATUS1_REQ_STS_EOC_MASK;
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if (sta1 == VADC_STATUS1_EOC)
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return 0;
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usleep_range(VADC_CONV_TIME_MIN_US, VADC_CONV_TIME_MAX_US);
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}
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vadc_show_status(vadc);
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return -ETIMEDOUT;
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}
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static int vadc_read_result(struct vadc_priv *vadc, u16 *data)
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{
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int ret;
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ret = regmap_bulk_read(vadc->regmap, vadc->base + VADC_DATA, data, 2);
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if (ret)
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return ret;
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*data = clamp_t(u16, *data, VADC_MIN_ADC_CODE, VADC_MAX_ADC_CODE);
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return 0;
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}
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static struct vadc_channel_prop *vadc_get_channel(struct vadc_priv *vadc,
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unsigned int num)
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{
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unsigned int i;
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for (i = 0; i < vadc->nchannels; i++)
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if (vadc->chan_props[i].channel == num)
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return &vadc->chan_props[i];
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dev_dbg(vadc->dev, "no such channel %02x\n", num);
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return NULL;
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}
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static int vadc_do_conversion(struct vadc_priv *vadc,
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struct vadc_channel_prop *prop, u16 *data)
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{
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unsigned int timeout;
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int ret;
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mutex_lock(&vadc->lock);
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ret = vadc_configure(vadc, prop);
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if (ret)
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goto unlock;
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if (!vadc->poll_eoc)
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reinit_completion(&vadc->complete);
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ret = vadc_set_state(vadc, true);
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if (ret)
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goto unlock;
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ret = vadc_write(vadc, VADC_CONV_REQ, VADC_CONV_REQ_SET);
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if (ret)
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goto err_disable;
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timeout = BIT(prop->avg_samples) * VADC_CONV_TIME_MIN_US * 2;
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if (vadc->poll_eoc) {
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ret = vadc_poll_wait_eoc(vadc, timeout);
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} else {
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ret = wait_for_completion_timeout(&vadc->complete, timeout);
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if (!ret) {
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ret = -ETIMEDOUT;
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goto err_disable;
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}
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/* Double check conversion status */
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ret = vadc_poll_wait_eoc(vadc, VADC_CONV_TIME_MIN_US);
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if (ret)
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goto err_disable;
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}
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ret = vadc_read_result(vadc, data);
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err_disable:
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vadc_set_state(vadc, false);
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if (ret)
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dev_err(vadc->dev, "conversion failed\n");
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unlock:
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mutex_unlock(&vadc->lock);
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return ret;
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}
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static int vadc_measure_ref_points(struct vadc_priv *vadc)
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{
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struct vadc_channel_prop *prop;
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u16 read_1, read_2;
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int ret;
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vadc->graph[VADC_CALIB_RATIOMETRIC].dx = VADC_RATIOMETRIC_RANGE;
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vadc->graph[VADC_CALIB_ABSOLUTE].dx = VADC_ABSOLUTE_RANGE_UV;
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prop = vadc_get_channel(vadc, VADC_REF_1250MV);
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ret = vadc_do_conversion(vadc, prop, &read_1);
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if (ret)
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goto err;
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/* Try with buffered 625mV channel first */
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prop = vadc_get_channel(vadc, VADC_SPARE1);
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if (!prop)
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prop = vadc_get_channel(vadc, VADC_REF_625MV);
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ret = vadc_do_conversion(vadc, prop, &read_2);
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if (ret)
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goto err;
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if (read_1 == read_2) {
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ret = -EINVAL;
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goto err;
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}
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vadc->graph[VADC_CALIB_ABSOLUTE].dy = read_1 - read_2;
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vadc->graph[VADC_CALIB_ABSOLUTE].gnd = read_2;
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/* Ratiometric calibration */
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prop = vadc_get_channel(vadc, VADC_VDD_VADC);
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ret = vadc_do_conversion(vadc, prop, &read_1);
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if (ret)
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goto err;
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prop = vadc_get_channel(vadc, VADC_GND_REF);
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ret = vadc_do_conversion(vadc, prop, &read_2);
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if (ret)
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goto err;
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if (read_1 == read_2) {
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ret = -EINVAL;
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goto err;
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}
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vadc->graph[VADC_CALIB_RATIOMETRIC].dy = read_1 - read_2;
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vadc->graph[VADC_CALIB_RATIOMETRIC].gnd = read_2;
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err:
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if (ret)
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dev_err(vadc->dev, "measure reference points failed\n");
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return ret;
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}
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static int vadc_prescaling_from_dt(u32 num, u32 den)
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{
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unsigned int pre;
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for (pre = 0; pre < ARRAY_SIZE(vadc_prescale_ratios); pre++)
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if (vadc_prescale_ratios[pre].num == num &&
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vadc_prescale_ratios[pre].den == den)
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break;
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|
|
if (pre == ARRAY_SIZE(vadc_prescale_ratios))
|
|
return -EINVAL;
|
|
|
|
return pre;
|
|
}
|
|
|
|
static int vadc_hw_settle_time_from_dt(u32 value)
|
|
{
|
|
if ((value <= 1000 && value % 100) || (value > 1000 && value % 2000))
|
|
return -EINVAL;
|
|
|
|
if (value <= 1000)
|
|
value /= 100;
|
|
else
|
|
value = value / 2000 + 10;
|
|
|
|
return value;
|
|
}
|
|
|
|
static int vadc_avg_samples_from_dt(u32 value)
|
|
{
|
|
if (!is_power_of_2(value) || value > VADC_AVG_SAMPLES_MAX)
|
|
return -EINVAL;
|
|
|
|
return __ffs64(value);
|
|
}
|
|
|
|
static int vadc_read_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan, int *val, int *val2,
|
|
long mask)
|
|
{
|
|
struct vadc_priv *vadc = iio_priv(indio_dev);
|
|
struct vadc_channel_prop *prop;
|
|
u16 adc_code;
|
|
int ret;
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_PROCESSED:
|
|
prop = &vadc->chan_props[chan->address];
|
|
ret = vadc_do_conversion(vadc, prop, &adc_code);
|
|
if (ret)
|
|
break;
|
|
|
|
ret = qcom_vadc_scale(prop->scale_fn_type,
|
|
&vadc->graph[prop->calibration],
|
|
&vadc_prescale_ratios[prop->prescale],
|
|
(prop->calibration == VADC_CALIB_ABSOLUTE),
|
|
adc_code, val);
|
|
if (ret)
|
|
break;
|
|
|
|
return IIO_VAL_INT;
|
|
case IIO_CHAN_INFO_RAW:
|
|
prop = &vadc->chan_props[chan->address];
|
|
ret = vadc_do_conversion(vadc, prop, &adc_code);
|
|
if (ret)
|
|
break;
|
|
|
|
*val = (int)adc_code;
|
|
return IIO_VAL_INT;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int vadc_of_xlate(struct iio_dev *indio_dev,
|
|
const struct of_phandle_args *iiospec)
|
|
{
|
|
struct vadc_priv *vadc = iio_priv(indio_dev);
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < vadc->nchannels; i++)
|
|
if (vadc->iio_chans[i].channel == iiospec->args[0])
|
|
return i;
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static const struct iio_info vadc_info = {
|
|
.read_raw = vadc_read_raw,
|
|
.of_xlate = vadc_of_xlate,
|
|
};
|
|
|
|
struct vadc_channels {
|
|
const char *datasheet_name;
|
|
unsigned int prescale_index;
|
|
enum iio_chan_type type;
|
|
long info_mask;
|
|
enum vadc_scale_fn_type scale_fn_type;
|
|
};
|
|
|
|
#define VADC_CHAN(_dname, _type, _mask, _pre, _scale) \
|
|
[VADC_##_dname] = { \
|
|
.datasheet_name = __stringify(_dname), \
|
|
.prescale_index = _pre, \
|
|
.type = _type, \
|
|
.info_mask = _mask, \
|
|
.scale_fn_type = _scale \
|
|
}, \
|
|
|
|
#define VADC_NO_CHAN(_dname, _type, _mask, _pre) \
|
|
[VADC_##_dname] = { \
|
|
.datasheet_name = __stringify(_dname), \
|
|
.prescale_index = _pre, \
|
|
.type = _type, \
|
|
.info_mask = _mask \
|
|
},
|
|
|
|
#define VADC_CHAN_TEMP(_dname, _pre, _scale) \
|
|
VADC_CHAN(_dname, IIO_TEMP, \
|
|
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_PROCESSED), \
|
|
_pre, _scale) \
|
|
|
|
#define VADC_CHAN_VOLT(_dname, _pre, _scale) \
|
|
VADC_CHAN(_dname, IIO_VOLTAGE, \
|
|
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_PROCESSED),\
|
|
_pre, _scale) \
|
|
|
|
#define VADC_CHAN_NO_SCALE(_dname, _pre) \
|
|
VADC_NO_CHAN(_dname, IIO_VOLTAGE, \
|
|
BIT(IIO_CHAN_INFO_RAW), \
|
|
_pre) \
|
|
|
|
/*
|
|
* The array represents all possible ADC channels found in the supported PMICs.
|
|
* Every index in the array is equal to the channel number per datasheet. The
|
|
* gaps in the array should be treated as reserved channels.
|
|
*/
|
|
static const struct vadc_channels vadc_chans[] = {
|
|
VADC_CHAN_VOLT(USBIN, 4, SCALE_DEFAULT)
|
|
VADC_CHAN_VOLT(DCIN, 4, SCALE_DEFAULT)
|
|
VADC_CHAN_NO_SCALE(VCHG_SNS, 3)
|
|
VADC_CHAN_NO_SCALE(SPARE1_03, 1)
|
|
VADC_CHAN_NO_SCALE(USB_ID_MV, 1)
|
|
VADC_CHAN_VOLT(VCOIN, 1, SCALE_DEFAULT)
|
|
VADC_CHAN_NO_SCALE(VBAT_SNS, 1)
|
|
VADC_CHAN_VOLT(VSYS, 1, SCALE_DEFAULT)
|
|
VADC_CHAN_TEMP(DIE_TEMP, 0, SCALE_PMIC_THERM)
|
|
VADC_CHAN_VOLT(REF_625MV, 0, SCALE_DEFAULT)
|
|
VADC_CHAN_VOLT(REF_1250MV, 0, SCALE_DEFAULT)
|
|
VADC_CHAN_NO_SCALE(CHG_TEMP, 0)
|
|
VADC_CHAN_NO_SCALE(SPARE1, 0)
|
|
VADC_CHAN_TEMP(SPARE2, 0, SCALE_PMI_CHG_TEMP)
|
|
VADC_CHAN_VOLT(GND_REF, 0, SCALE_DEFAULT)
|
|
VADC_CHAN_VOLT(VDD_VADC, 0, SCALE_DEFAULT)
|
|
|
|
VADC_CHAN_NO_SCALE(P_MUX1_1_1, 0)
|
|
VADC_CHAN_NO_SCALE(P_MUX2_1_1, 0)
|
|
VADC_CHAN_NO_SCALE(P_MUX3_1_1, 0)
|
|
VADC_CHAN_NO_SCALE(P_MUX4_1_1, 0)
|
|
VADC_CHAN_NO_SCALE(P_MUX5_1_1, 0)
|
|
VADC_CHAN_NO_SCALE(P_MUX6_1_1, 0)
|
|
VADC_CHAN_NO_SCALE(P_MUX7_1_1, 0)
|
|
VADC_CHAN_NO_SCALE(P_MUX8_1_1, 0)
|
|
VADC_CHAN_NO_SCALE(P_MUX9_1_1, 0)
|
|
VADC_CHAN_NO_SCALE(P_MUX10_1_1, 0)
|
|
VADC_CHAN_NO_SCALE(P_MUX11_1_1, 0)
|
|
VADC_CHAN_NO_SCALE(P_MUX12_1_1, 0)
|
|
VADC_CHAN_NO_SCALE(P_MUX13_1_1, 0)
|
|
VADC_CHAN_NO_SCALE(P_MUX14_1_1, 0)
|
|
VADC_CHAN_NO_SCALE(P_MUX15_1_1, 0)
|
|
VADC_CHAN_NO_SCALE(P_MUX16_1_1, 0)
|
|
|
|
VADC_CHAN_NO_SCALE(P_MUX1_1_3, 1)
|
|
VADC_CHAN_NO_SCALE(P_MUX2_1_3, 1)
|
|
VADC_CHAN_NO_SCALE(P_MUX3_1_3, 1)
|
|
VADC_CHAN_NO_SCALE(P_MUX4_1_3, 1)
|
|
VADC_CHAN_NO_SCALE(P_MUX5_1_3, 1)
|
|
VADC_CHAN_NO_SCALE(P_MUX6_1_3, 1)
|
|
VADC_CHAN_NO_SCALE(P_MUX7_1_3, 1)
|
|
VADC_CHAN_NO_SCALE(P_MUX8_1_3, 1)
|
|
VADC_CHAN_NO_SCALE(P_MUX9_1_3, 1)
|
|
VADC_CHAN_NO_SCALE(P_MUX10_1_3, 1)
|
|
VADC_CHAN_NO_SCALE(P_MUX11_1_3, 1)
|
|
VADC_CHAN_NO_SCALE(P_MUX12_1_3, 1)
|
|
VADC_CHAN_NO_SCALE(P_MUX13_1_3, 1)
|
|
VADC_CHAN_NO_SCALE(P_MUX14_1_3, 1)
|
|
VADC_CHAN_NO_SCALE(P_MUX15_1_3, 1)
|
|
VADC_CHAN_NO_SCALE(P_MUX16_1_3, 1)
|
|
|
|
VADC_CHAN_NO_SCALE(LR_MUX1_BAT_THERM, 0)
|
|
VADC_CHAN_VOLT(LR_MUX2_BAT_ID, 0, SCALE_DEFAULT)
|
|
VADC_CHAN_NO_SCALE(LR_MUX3_XO_THERM, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX4_AMUX_THM1, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX5_AMUX_THM2, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX6_AMUX_THM3, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX7_HW_ID, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX8_AMUX_THM4, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX9_AMUX_THM5, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX10_USB_ID, 0)
|
|
VADC_CHAN_NO_SCALE(AMUX_PU1, 0)
|
|
VADC_CHAN_NO_SCALE(AMUX_PU2, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX3_BUF_XO_THERM, 0)
|
|
|
|
VADC_CHAN_NO_SCALE(LR_MUX1_PU1_BAT_THERM, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX2_PU1_BAT_ID, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX3_PU1_XO_THERM, 0)
|
|
VADC_CHAN_TEMP(LR_MUX4_PU1_AMUX_THM1, 0, SCALE_THERM_100K_PULLUP)
|
|
VADC_CHAN_TEMP(LR_MUX5_PU1_AMUX_THM2, 0, SCALE_THERM_100K_PULLUP)
|
|
VADC_CHAN_TEMP(LR_MUX6_PU1_AMUX_THM3, 0, SCALE_THERM_100K_PULLUP)
|
|
VADC_CHAN_NO_SCALE(LR_MUX7_PU1_AMUX_HW_ID, 0)
|
|
VADC_CHAN_TEMP(LR_MUX8_PU1_AMUX_THM4, 0, SCALE_THERM_100K_PULLUP)
|
|
VADC_CHAN_TEMP(LR_MUX9_PU1_AMUX_THM5, 0, SCALE_THERM_100K_PULLUP)
|
|
VADC_CHAN_NO_SCALE(LR_MUX10_PU1_AMUX_USB_ID, 0)
|
|
VADC_CHAN_TEMP(LR_MUX3_BUF_PU1_XO_THERM, 0, SCALE_XOTHERM)
|
|
|
|
VADC_CHAN_NO_SCALE(LR_MUX1_PU2_BAT_THERM, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX2_PU2_BAT_ID, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX3_PU2_XO_THERM, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX4_PU2_AMUX_THM1, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX5_PU2_AMUX_THM2, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX6_PU2_AMUX_THM3, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX7_PU2_AMUX_HW_ID, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX8_PU2_AMUX_THM4, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX9_PU2_AMUX_THM5, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX10_PU2_AMUX_USB_ID, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX3_BUF_PU2_XO_THERM, 0)
|
|
|
|
VADC_CHAN_NO_SCALE(LR_MUX1_PU1_PU2_BAT_THERM, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX2_PU1_PU2_BAT_ID, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX3_PU1_PU2_XO_THERM, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX4_PU1_PU2_AMUX_THM1, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX5_PU1_PU2_AMUX_THM2, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX6_PU1_PU2_AMUX_THM3, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX7_PU1_PU2_AMUX_HW_ID, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX8_PU1_PU2_AMUX_THM4, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX9_PU1_PU2_AMUX_THM5, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX10_PU1_PU2_AMUX_USB_ID, 0)
|
|
VADC_CHAN_NO_SCALE(LR_MUX3_BUF_PU1_PU2_XO_THERM, 0)
|
|
};
|
|
|
|
static int vadc_get_dt_channel_data(struct device *dev,
|
|
struct vadc_channel_prop *prop,
|
|
struct device_node *node)
|
|
{
|
|
const char *name = node->name;
|
|
u32 chan, value, varr[2];
|
|
int ret;
|
|
|
|
ret = of_property_read_u32(node, "reg", &chan);
|
|
if (ret) {
|
|
dev_err(dev, "invalid channel number %s\n", name);
|
|
return ret;
|
|
}
|
|
|
|
if (chan > VADC_CHAN_MAX || chan < VADC_CHAN_MIN) {
|
|
dev_err(dev, "%s invalid channel number %d\n", name, chan);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* the channel has DT description */
|
|
prop->channel = chan;
|
|
|
|
ret = of_property_read_u32(node, "qcom,decimation", &value);
|
|
if (!ret) {
|
|
ret = qcom_vadc_decimation_from_dt(value);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%02x invalid decimation %d\n",
|
|
chan, value);
|
|
return ret;
|
|
}
|
|
prop->decimation = ret;
|
|
} else {
|
|
prop->decimation = VADC_DEF_DECIMATION;
|
|
}
|
|
|
|
ret = of_property_read_u32_array(node, "qcom,pre-scaling", varr, 2);
|
|
if (!ret) {
|
|
ret = vadc_prescaling_from_dt(varr[0], varr[1]);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%02x invalid pre-scaling <%d %d>\n",
|
|
chan, varr[0], varr[1]);
|
|
return ret;
|
|
}
|
|
prop->prescale = ret;
|
|
} else {
|
|
prop->prescale = vadc_chans[prop->channel].prescale_index;
|
|
}
|
|
|
|
ret = of_property_read_u32(node, "qcom,hw-settle-time", &value);
|
|
if (!ret) {
|
|
ret = vadc_hw_settle_time_from_dt(value);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%02x invalid hw-settle-time %d us\n",
|
|
chan, value);
|
|
return ret;
|
|
}
|
|
prop->hw_settle_time = ret;
|
|
} else {
|
|
prop->hw_settle_time = VADC_DEF_HW_SETTLE_TIME;
|
|
}
|
|
|
|
ret = of_property_read_u32(node, "qcom,avg-samples", &value);
|
|
if (!ret) {
|
|
ret = vadc_avg_samples_from_dt(value);
|
|
if (ret < 0) {
|
|
dev_err(dev, "%02x invalid avg-samples %d\n",
|
|
chan, value);
|
|
return ret;
|
|
}
|
|
prop->avg_samples = ret;
|
|
} else {
|
|
prop->avg_samples = VADC_DEF_AVG_SAMPLES;
|
|
}
|
|
|
|
if (of_property_read_bool(node, "qcom,ratiometric"))
|
|
prop->calibration = VADC_CALIB_RATIOMETRIC;
|
|
else
|
|
prop->calibration = VADC_CALIB_ABSOLUTE;
|
|
|
|
dev_dbg(dev, "%02x name %s\n", chan, name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vadc_get_dt_data(struct vadc_priv *vadc, struct device_node *node)
|
|
{
|
|
const struct vadc_channels *vadc_chan;
|
|
struct iio_chan_spec *iio_chan;
|
|
struct vadc_channel_prop prop;
|
|
struct device_node *child;
|
|
unsigned int index = 0;
|
|
int ret;
|
|
|
|
vadc->nchannels = of_get_available_child_count(node);
|
|
if (!vadc->nchannels)
|
|
return -EINVAL;
|
|
|
|
vadc->iio_chans = devm_kcalloc(vadc->dev, vadc->nchannels,
|
|
sizeof(*vadc->iio_chans), GFP_KERNEL);
|
|
if (!vadc->iio_chans)
|
|
return -ENOMEM;
|
|
|
|
vadc->chan_props = devm_kcalloc(vadc->dev, vadc->nchannels,
|
|
sizeof(*vadc->chan_props), GFP_KERNEL);
|
|
if (!vadc->chan_props)
|
|
return -ENOMEM;
|
|
|
|
iio_chan = vadc->iio_chans;
|
|
|
|
for_each_available_child_of_node(node, child) {
|
|
ret = vadc_get_dt_channel_data(vadc->dev, &prop, child);
|
|
if (ret) {
|
|
of_node_put(child);
|
|
return ret;
|
|
}
|
|
|
|
prop.scale_fn_type = vadc_chans[prop.channel].scale_fn_type;
|
|
vadc->chan_props[index] = prop;
|
|
|
|
vadc_chan = &vadc_chans[prop.channel];
|
|
|
|
iio_chan->channel = prop.channel;
|
|
iio_chan->datasheet_name = vadc_chan->datasheet_name;
|
|
iio_chan->info_mask_separate = vadc_chan->info_mask;
|
|
iio_chan->type = vadc_chan->type;
|
|
iio_chan->indexed = 1;
|
|
iio_chan->address = index++;
|
|
|
|
iio_chan++;
|
|
}
|
|
|
|
/* These channels are mandatory, they are used as reference points */
|
|
if (!vadc_get_channel(vadc, VADC_REF_1250MV)) {
|
|
dev_err(vadc->dev, "Please define 1.25V channel\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!vadc_get_channel(vadc, VADC_REF_625MV)) {
|
|
dev_err(vadc->dev, "Please define 0.625V channel\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!vadc_get_channel(vadc, VADC_VDD_VADC)) {
|
|
dev_err(vadc->dev, "Please define VDD channel\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!vadc_get_channel(vadc, VADC_GND_REF)) {
|
|
dev_err(vadc->dev, "Please define GND channel\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static irqreturn_t vadc_isr(int irq, void *dev_id)
|
|
{
|
|
struct vadc_priv *vadc = dev_id;
|
|
|
|
complete(&vadc->complete);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int vadc_check_revision(struct vadc_priv *vadc)
|
|
{
|
|
u8 val;
|
|
int ret;
|
|
|
|
ret = vadc_read(vadc, VADC_PERPH_TYPE, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (val < VADC_PERPH_TYPE_ADC) {
|
|
dev_err(vadc->dev, "%d is not ADC\n", val);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = vadc_read(vadc, VADC_PERPH_SUBTYPE, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (val < VADC_PERPH_SUBTYPE_VADC) {
|
|
dev_err(vadc->dev, "%d is not VADC\n", val);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = vadc_read(vadc, VADC_REVISION2, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (val < VADC_REVISION2_SUPPORTED_VADC) {
|
|
dev_err(vadc->dev, "revision %d not supported\n", val);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vadc_probe(struct platform_device *pdev)
|
|
{
|
|
struct device_node *node = pdev->dev.of_node;
|
|
struct device *dev = &pdev->dev;
|
|
struct iio_dev *indio_dev;
|
|
struct vadc_priv *vadc;
|
|
struct regmap *regmap;
|
|
int ret, irq_eoc;
|
|
u32 reg;
|
|
|
|
regmap = dev_get_regmap(dev->parent, NULL);
|
|
if (!regmap)
|
|
return -ENODEV;
|
|
|
|
ret = of_property_read_u32(node, "reg", ®);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
indio_dev = devm_iio_device_alloc(dev, sizeof(*vadc));
|
|
if (!indio_dev)
|
|
return -ENOMEM;
|
|
|
|
vadc = iio_priv(indio_dev);
|
|
vadc->regmap = regmap;
|
|
vadc->dev = dev;
|
|
vadc->base = reg;
|
|
vadc->are_ref_measured = false;
|
|
init_completion(&vadc->complete);
|
|
mutex_init(&vadc->lock);
|
|
|
|
ret = vadc_check_revision(vadc);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = vadc_get_dt_data(vadc, node);
|
|
if (ret)
|
|
return ret;
|
|
|
|
irq_eoc = platform_get_irq(pdev, 0);
|
|
if (irq_eoc < 0) {
|
|
if (irq_eoc == -EPROBE_DEFER || irq_eoc == -EINVAL)
|
|
return irq_eoc;
|
|
vadc->poll_eoc = true;
|
|
} else {
|
|
ret = devm_request_irq(dev, irq_eoc, vadc_isr, 0,
|
|
"spmi-vadc", vadc);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ret = vadc_reset(vadc);
|
|
if (ret) {
|
|
dev_err(dev, "reset failed\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = vadc_measure_ref_points(vadc);
|
|
if (ret)
|
|
return ret;
|
|
|
|
indio_dev->name = pdev->name;
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
indio_dev->info = &vadc_info;
|
|
indio_dev->channels = vadc->iio_chans;
|
|
indio_dev->num_channels = vadc->nchannels;
|
|
|
|
return devm_iio_device_register(dev, indio_dev);
|
|
}
|
|
|
|
static const struct of_device_id vadc_match_table[] = {
|
|
{ .compatible = "qcom,spmi-vadc" },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, vadc_match_table);
|
|
|
|
static struct platform_driver vadc_driver = {
|
|
.driver = {
|
|
.name = "qcom-spmi-vadc",
|
|
.of_match_table = vadc_match_table,
|
|
},
|
|
.probe = vadc_probe,
|
|
};
|
|
module_platform_driver(vadc_driver);
|
|
|
|
MODULE_ALIAS("platform:qcom-spmi-vadc");
|
|
MODULE_DESCRIPTION("Qualcomm SPMI PMIC voltage ADC driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Stanimir Varbanov <svarbanov@mm-sol.com>");
|
|
MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");
|