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author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-12 21:43:41 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-12 21:43:41 +0200 |
commit | 1c46ae0af6df0bbde66c5e868563be57f18a27b4 (patch) | |
tree | b5dbe61f8d05f9c67aff0080ea87945342d58c7d /drivers/iio/adc | |
parent | staging: ozwpan: Remove from tree (diff) | |
parent | iio: event: Remove negative error code from iio_event_poll (diff) | |
download | linux-1c46ae0af6df0bbde66c5e868563be57f18a27b4.tar.xz linux-1c46ae0af6df0bbde66c5e868563be57f18a27b4.zip |
Merge tag 'iio-for-4.3b-2' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next
Jonathan writes:
Second set of new device support, features and cleanup for the 4.3 cycle.
Take 2 also includes a fix set that was too late for the 4.2 cycle.
As we had a lot of tools and docs work in this set, I have broken those
out into their own categories in this description.
Fixes from the pull request '4th set of IIO fixes for the 4.2 cycle'.
* Poll functions for both event chardev and the buffer one were returning
negative error codes (via a positive value).
* A recent change to lsiio adding some error handling that was wrong and
stopped the tool working.
* bmg160 was missing some dependencies in Kconfig
* berlin2-adc had a misshandled register (wrote a value rather than a bitmap)
New device support
* TI opt3001 light sensor
* TXC PA12 ALS and proximity sensor.
* mcp3301 ADC support (in mcp320x driver)
* ST lsm303agr accelerometer and magnetometer drivers (plus some st-sensors
common support to allow different WHOAMI register addresses, devices with
fixed scale and allow interrupt equiped magnetometers).
* ADIS16305, ADIS16367, ADIS16445IMUs (in the adis16400 driver)
* ADIS16266 gyro (in the adis16260 driver)
* ADIS16137 gyro (in the adis16136 driver)
New functionality
* mmc35240 DT bindings.
* Inverse unit conversion macros to aid handing of values written to sysfs
attributes.
Core cleanup
* Forward declaration of struct iio_trigger to avoid a compile warning.
Driver cleanup / fixes
* mxs-lradc
- Clarify which parts are supported.
- Fix spelling erorrs.
- Missing/extra includes
- reorder includes
- add datasheet name listings for all usable channels (to allow them
to be bound by name from consumer drivers)
* acpi-als - add some function prefixes as per general iio style.
* bmc150_magn - replace a magic value with the existing define.
* vf610 - determine possible sample frequencies taking into account the
electrical characteristics (defining a minimum sample time)
* dht11
- whitespace
- additional docs
- avoid mulitple assignments in one line
- Use the new funciton ktime_get_resolution_ns to cleanup a nasty trick
previously used for timing.
* Fix all drivers that consider 0 a valid IRQ for historical reasons.
* Export I2C module alias info where previously missing (to allow autoprobing)
* Export OF module alias info where previously missing.
* mmc35240 - switch some variables into arrays to improve readability.
* mlx90614 - define some magic numbers for readability.
* bmc150_magn
- expand area locked by a mutex to cover all the use of the
data->buffer.
- use descriptive naming for a mask instead of a magic value.
* berin2-adc
- pass up an error code rather that a generic error
- constify the iio_chan_spec
- some other little tidy ups.
* stk8312
- fix a dependency on triggered buffers in kconfig
- add a check for invalid attribute values
- improve error handling by returning error codes where possible and
return immediately where relevant
- rework macro defs to use GENMASK etc
- change some variable types to reduce unnecessary casting
- clean up code style
- drop a local buffer copy for bulk reads and use the one in data->buffer
instead.
* adis16400 - the adis16448 gyroscope scale was wrong.
* adis16480 - some more wrong scales for various parts.
* adis16300 - has an undocumented product id and serial number registers so
use them.
* iio_simple_dummy - fix some wrong code indentation.
* bmc150-accel - use the chip ID to detect the chip present rather than
verifying the expected part was there. This was in response to a wrong
ACPI entry on the WinBook TW100.
* mma8452
- fix _get_hp_filter_index
- drop a double include
- pass up an error code rather than rewriting it
- range check input values to attribute writes
- register defs tidy up using GENMASK and reordering them to be easier to
follow.
- various coding style cleanups
- put the Kconfig entry in the write place (alphabetically).
Tools related
* Tools cleanup - drop an explicity NULL comparison, some unnecessary braces,
use the ARRAY_SIZE macro, send error messages to stderr instead of dropping
them in the middle of normal output.
* Fix tools to allow that scale and offset attributes are optional.
* More tools fixes including allowing true 32bit data (previously an overflow
prevented more than 31bits)
* Drop a stray header guard that ended up in a c file.
* Make calc_digits static as it isn't exported or in the header.
* Set ci_array pointer to NULL after free as a protection against non safe
usage of the tools core code. Also convert a double pointer to a single
one as the extra level of indirection was unnecessary.
Docs
* DocBook introduction by Daniel Baluta. Glad we are beginning to
draw together some more introductory docs to suplement the various
tools / examples.
* Drop bytes_per_datum sysfs attribute docs as it no longer exists.
* A whole load of missing / fixing of kernel-doc for the core of IIO.
* Document the trigger name sysfs attribute in the ABI docs.
* Minor typos in the ABI docs related to power down modes.
Diffstat (limited to 'drivers/iio/adc')
-rw-r--r-- | drivers/iio/adc/Kconfig | 4 | ||||
-rw-r--r-- | drivers/iio/adc/berlin2-adc.c | 22 | ||||
-rw-r--r-- | drivers/iio/adc/mcp320x.c | 16 | ||||
-rw-r--r-- | drivers/iio/adc/vf610_adc.c | 79 |
4 files changed, 102 insertions, 19 deletions
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 233d47b7dea8..50c103d75af9 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -228,8 +228,8 @@ config MCP320X depends on SPI help Say yes here to build support for Microchip Technology's - MCP3001, MCP3002, MCP3004, MCP3008, MCP3201, MCP3202, MCP3204 or - MCP3208 analog to digital converter. + MCP3001, MCP3002, MCP3004, MCP3008, MCP3201, MCP3202, MCP3204, + MCP3208 or MCP3301 analog to digital converter. This driver can also be built as a module. If so, the module will be called mcp320x. diff --git a/drivers/iio/adc/berlin2-adc.c b/drivers/iio/adc/berlin2-adc.c index aecc9ad995ad..4946d9bf1764 100644 --- a/drivers/iio/adc/berlin2-adc.c +++ b/drivers/iio/adc/berlin2-adc.c @@ -26,7 +26,7 @@ #define BERLIN2_SM_CTRL 0x14 #define BERLIN2_SM_CTRL_SM_SOC_INT BIT(1) #define BERLIN2_SM_CTRL_SOC_SM_INT BIT(2) -#define BERLIN2_SM_CTRL_ADC_SEL(x) (BIT(x) << 5) /* 0-15 */ +#define BERLIN2_SM_CTRL_ADC_SEL(x) ((x) << 5) /* 0-15 */ #define BERLIN2_SM_CTRL_ADC_SEL_MASK (0xf << 5) #define BERLIN2_SM_CTRL_ADC_POWER BIT(9) #define BERLIN2_SM_CTRL_ADC_CLKSEL_DIV2 (0x0 << 10) @@ -53,14 +53,14 @@ #define BERLIN2_SM_ADC_MASK 0x3ff #define BERLIN2_SM_ADC_STATUS 0x1c #define BERLIN2_SM_ADC_STATUS_DATA_RDY(x) BIT(x) /* 0-15 */ -#define BERLIN2_SM_ADC_STATUS_DATA_RDY_MASK 0xf +#define BERLIN2_SM_ADC_STATUS_DATA_RDY_MASK GENMASK(15, 0) #define BERLIN2_SM_ADC_STATUS_INT_EN(x) (BIT(x) << 16) /* 0-15 */ -#define BERLIN2_SM_ADC_STATUS_INT_EN_MASK (0xf << 16) +#define BERLIN2_SM_ADC_STATUS_INT_EN_MASK GENMASK(31, 16) #define BERLIN2_SM_TSEN_STATUS 0x24 #define BERLIN2_SM_TSEN_STATUS_DATA_RDY BIT(0) #define BERLIN2_SM_TSEN_STATUS_INT_EN BIT(1) #define BERLIN2_SM_TSEN_DATA 0x28 -#define BERLIN2_SM_TSEN_MASK 0xfff +#define BERLIN2_SM_TSEN_MASK GENMASK(9, 0) #define BERLIN2_SM_TSEN_CTRL 0x74 #define BERLIN2_SM_TSEN_CTRL_START BIT(8) #define BERLIN2_SM_TSEN_CTRL_SETTLING_4 (0x0 << 21) /* 4 us */ @@ -86,7 +86,7 @@ struct berlin2_adc_priv { .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ } -static struct iio_chan_spec berlin2_adc_channels[] = { +static const struct iio_chan_spec berlin2_adc_channels[] = { BERLIN2_ADC_CHANNEL(0, IIO_VOLTAGE), /* external input */ BERLIN2_ADC_CHANNEL(1, IIO_VOLTAGE), /* external input */ BERLIN2_ADC_CHANNEL(2, IIO_VOLTAGE), /* external input */ @@ -103,7 +103,6 @@ static struct iio_chan_spec berlin2_adc_channels[] = { BERLIN2_ADC_CHANNEL(7, IIO_VOLTAGE), /* reserved */ IIO_CHAN_SOFT_TIMESTAMP(8), /* timestamp */ }; -#define BERLIN2_N_CHANNELS ARRAY_SIZE(berlin2_adc_channels) static int berlin2_adc_read(struct iio_dev *indio_dev, int channel) { @@ -221,7 +220,7 @@ static int berlin2_adc_read_raw(struct iio_dev *indio_dev, return temp; if (temp > 2047) - temp = -(4096 - temp); + temp -= 4096; /* Convert to milli Celsius */ *val = ((temp * 100000) / 264 - 270000); @@ -286,8 +285,7 @@ static int berlin2_adc_probe(struct platform_device *pdev) int irq, tsen_irq; int ret; - indio_dev = devm_iio_device_alloc(&pdev->dev, - sizeof(struct berlin2_adc_priv)); + indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*priv)); if (!indio_dev) return -ENOMEM; @@ -301,11 +299,11 @@ static int berlin2_adc_probe(struct platform_device *pdev) irq = platform_get_irq_byname(pdev, "adc"); if (irq < 0) - return -ENODEV; + return irq; tsen_irq = platform_get_irq_byname(pdev, "tsen"); if (tsen_irq < 0) - return -ENODEV; + return tsen_irq; ret = devm_request_irq(&pdev->dev, irq, berlin2_adc_irq, 0, pdev->dev.driver->name, indio_dev); @@ -325,8 +323,8 @@ static int berlin2_adc_probe(struct platform_device *pdev) indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &berlin2_adc_info; - indio_dev->num_channels = BERLIN2_N_CHANNELS; indio_dev->channels = berlin2_adc_channels; + indio_dev->num_channels = ARRAY_SIZE(berlin2_adc_channels); /* Power up the ADC */ regmap_update_bits(priv->regmap, BERLIN2_SM_CTRL, diff --git a/drivers/iio/adc/mcp320x.c b/drivers/iio/adc/mcp320x.c index d819823f7257..b19e4f9d16e0 100644 --- a/drivers/iio/adc/mcp320x.c +++ b/drivers/iio/adc/mcp320x.c @@ -25,6 +25,7 @@ * http://ww1.microchip.com/downloads/en/DeviceDoc/21290D.pdf mcp3201 * http://ww1.microchip.com/downloads/en/DeviceDoc/21034D.pdf mcp3202 * http://ww1.microchip.com/downloads/en/DeviceDoc/21298c.pdf mcp3204/08 + * http://ww1.microchip.com/downloads/en/DeviceDoc/21700E.pdf mcp3301 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -47,6 +48,7 @@ enum { mcp3202, mcp3204, mcp3208, + mcp3301, }; struct mcp320x_chip_info { @@ -76,6 +78,7 @@ static int mcp320x_channel_to_tx_data(int device_index, switch (device_index) { case mcp3001: case mcp3201: + case mcp3301: return 0; case mcp3002: case mcp3202: @@ -102,7 +105,7 @@ static int mcp320x_adc_conversion(struct mcp320x *adc, u8 channel, adc->tx_buf = mcp320x_channel_to_tx_data(device_index, channel, differential); - if (device_index != mcp3001 && device_index != mcp3201) { + if (device_index != mcp3001 && device_index != mcp3201 && device_index != mcp3301) { ret = spi_sync(adc->spi, &adc->msg); if (ret < 0) return ret; @@ -125,6 +128,8 @@ static int mcp320x_adc_conversion(struct mcp320x *adc, u8 channel, case mcp3204: case mcp3208: return (adc->rx_buf[0] << 4 | adc->rx_buf[1] >> 4); + case mcp3301: + return sign_extend32((adc->rx_buf[0] & 0x1f) << 8 | adc->rx_buf[1], 12); default: return -EINVAL; } @@ -274,6 +279,11 @@ static const struct mcp320x_chip_info mcp320x_chip_infos[] = { .num_channels = ARRAY_SIZE(mcp3208_channels), .resolution = 12 }, + [mcp3301] = { + .channels = mcp3201_channels, + .num_channels = ARRAY_SIZE(mcp3201_channels), + .resolution = 13 + }, }; static int mcp320x_probe(struct spi_device *spi) @@ -369,6 +379,9 @@ static const struct of_device_id mcp320x_dt_ids[] = { .compatible = "mcp3208", .data = &mcp320x_chip_infos[mcp3208], }, { + .compatible = "mcp3301", + .data = &mcp320x_chip_infos[mcp3301], + }, { } }; MODULE_DEVICE_TABLE(of, mcp320x_dt_ids); @@ -383,6 +396,7 @@ static const struct spi_device_id mcp320x_id[] = { { "mcp3202", mcp3202 }, { "mcp3204", mcp3204 }, { "mcp3208", mcp3208 }, + { "mcp3301", mcp3301 }, { } }; MODULE_DEVICE_TABLE(spi, mcp320x_id); diff --git a/drivers/iio/adc/vf610_adc.c b/drivers/iio/adc/vf610_adc.c index 819632bf1fda..6bf4c20eb231 100644 --- a/drivers/iio/adc/vf610_adc.c +++ b/drivers/iio/adc/vf610_adc.c @@ -68,6 +68,9 @@ #define VF610_ADC_CLK_DIV8 0x60 #define VF610_ADC_CLK_MASK 0x60 #define VF610_ADC_ADLSMP_LONG 0x10 +#define VF610_ADC_ADSTS_SHORT 0x100 +#define VF610_ADC_ADSTS_NORMAL 0x200 +#define VF610_ADC_ADSTS_LONG 0x300 #define VF610_ADC_ADSTS_MASK 0x300 #define VF610_ADC_ADLPC_EN 0x80 #define VF610_ADC_ADHSC_EN 0x400 @@ -98,6 +101,8 @@ #define VF610_ADC_CALF 0x2 #define VF610_ADC_TIMEOUT msecs_to_jiffies(100) +#define DEFAULT_SAMPLE_TIME 1000 + enum clk_sel { VF610_ADCIOC_BUSCLK_SET, VF610_ADCIOC_ALTCLK_SET, @@ -124,6 +129,17 @@ enum conversion_mode_sel { VF610_ADC_CONV_LOW_POWER, }; +enum lst_adder_sel { + VF610_ADCK_CYCLES_3, + VF610_ADCK_CYCLES_5, + VF610_ADCK_CYCLES_7, + VF610_ADCK_CYCLES_9, + VF610_ADCK_CYCLES_13, + VF610_ADCK_CYCLES_17, + VF610_ADCK_CYCLES_21, + VF610_ADCK_CYCLES_25, +}; + struct vf610_adc_feature { enum clk_sel clk_sel; enum vol_ref vol_ref; @@ -132,6 +148,8 @@ struct vf610_adc_feature { int clk_div; int sample_rate; int res_mode; + u32 lst_adder_index; + u32 default_sample_time; bool calibration; bool ovwren; @@ -155,11 +173,13 @@ struct vf610_adc { }; static const u32 vf610_hw_avgs[] = { 1, 4, 8, 16, 32 }; +static const u32 vf610_lst_adder[] = { 3, 5, 7, 9, 13, 17, 21, 25 }; static inline void vf610_adc_calculate_rates(struct vf610_adc *info) { struct vf610_adc_feature *adc_feature = &info->adc_feature; unsigned long adck_rate, ipg_rate = clk_get_rate(info->clk); + u32 adck_period, lst_addr_min; int divisor, i; adck_rate = info->max_adck_rate[adc_feature->conv_mode]; @@ -174,6 +194,19 @@ static inline void vf610_adc_calculate_rates(struct vf610_adc *info) } /* + * Determine the long sample time adder value to be used based + * on the default minimum sample time provided. + */ + adck_period = NSEC_PER_SEC / adck_rate; + lst_addr_min = adc_feature->default_sample_time / adck_period; + for (i = 0; i < ARRAY_SIZE(vf610_lst_adder); i++) { + if (vf610_lst_adder[i] > lst_addr_min) { + adc_feature->lst_adder_index = i; + break; + } + } + + /* * Calculate ADC sample frequencies * Sample time unit is ADCK cycles. ADCK clk source is ipg clock, * which is the same as bus clock. @@ -182,12 +215,13 @@ static inline void vf610_adc_calculate_rates(struct vf610_adc *info) * SFCAdder: fixed to 6 ADCK cycles * AverageNum: 1, 4, 8, 16, 32 samples for hardware average. * BCT (Base Conversion Time): fixed to 25 ADCK cycles for 12 bit mode - * LSTAdder(Long Sample Time): fixed to 3 ADCK cycles + * LSTAdder(Long Sample Time): 3, 5, 7, 9, 13, 17, 21, 25 ADCK cycles */ adck_rate = ipg_rate / info->adc_feature.clk_div; for (i = 0; i < ARRAY_SIZE(vf610_hw_avgs); i++) info->sample_freq_avail[i] = - adck_rate / (6 + vf610_hw_avgs[i] * (25 + 3)); + adck_rate / (6 + vf610_hw_avgs[i] * + (25 + vf610_lst_adder[adc_feature->lst_adder_index])); } static inline void vf610_adc_cfg_init(struct vf610_adc *info) @@ -347,8 +381,40 @@ static void vf610_adc_sample_set(struct vf610_adc *info) break; } - /* Use the short sample mode */ - cfg_data &= ~(VF610_ADC_ADLSMP_LONG | VF610_ADC_ADSTS_MASK); + /* + * Set ADLSMP and ADSTS based on the Long Sample Time Adder value + * determined. + */ + switch (adc_feature->lst_adder_index) { + case VF610_ADCK_CYCLES_3: + break; + case VF610_ADCK_CYCLES_5: + cfg_data |= VF610_ADC_ADSTS_SHORT; + break; + case VF610_ADCK_CYCLES_7: + cfg_data |= VF610_ADC_ADSTS_NORMAL; + break; + case VF610_ADCK_CYCLES_9: + cfg_data |= VF610_ADC_ADSTS_LONG; + break; + case VF610_ADCK_CYCLES_13: + cfg_data |= VF610_ADC_ADLSMP_LONG; + break; + case VF610_ADCK_CYCLES_17: + cfg_data |= VF610_ADC_ADLSMP_LONG; + cfg_data |= VF610_ADC_ADSTS_SHORT; + break; + case VF610_ADCK_CYCLES_21: + cfg_data |= VF610_ADC_ADLSMP_LONG; + cfg_data |= VF610_ADC_ADSTS_NORMAL; + break; + case VF610_ADCK_CYCLES_25: + cfg_data |= VF610_ADC_ADLSMP_LONG; + cfg_data |= VF610_ADC_ADSTS_NORMAL; + break; + default: + dev_err(info->dev, "error in sample time select\n"); + } /* update hardware average selection */ cfg_data &= ~VF610_ADC_AVGS_MASK; @@ -713,6 +779,11 @@ static int vf610_adc_probe(struct platform_device *pdev) of_property_read_u32_array(pdev->dev.of_node, "fsl,adck-max-frequency", info->max_adck_rate, 3); + ret = of_property_read_u32(pdev->dev.of_node, "min-sample-time", + &info->adc_feature.default_sample_time); + if (ret) + info->adc_feature.default_sample_time = DEFAULT_SAMPLE_TIME; + platform_set_drvdata(pdev, indio_dev); init_completion(&info->completion); |