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author | Linus Walleij <linus.walleij@linaro.org> | 2021-11-25 03:08:41 +0100 |
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committer | Guenter Roeck <linux@roeck-us.net> | 2021-12-26 15:02:06 -0800 |
commit | e380095b8018acd9f962a9020251c5d8f1191e49 (patch) | |
tree | 408065af1d0b9a392f57d181bf8b32504dbdd237 /drivers/hwmon/ntc_thermistor.c | |
parent | 209218efd6ac8bebfe85fd2bc3ad64e5c3bad0a8 (diff) | |
download | linux-e380095b8018acd9f962a9020251c5d8f1191e49.tar.gz linux-e380095b8018acd9f962a9020251c5d8f1191e49.tar.bz2 linux-e380095b8018acd9f962a9020251c5d8f1191e49.zip |
hwmon: (ntc_thermistor) Merge platform data
Allocate one state container for the device: struct ntc_data.
Move all items from struct ntc_thermistor_platform_data into
this struct and simplify.
Cc: Peter Rosin <peda@axentia.se>
Cc: Chris Lesiak <chris.lesiak@licor.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20211125020841.3616359-5-linus.walleij@linaro.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/ntc_thermistor.c')
-rw-r--r-- | drivers/hwmon/ntc_thermistor.c | 109 |
1 files changed, 48 insertions, 61 deletions
diff --git a/drivers/hwmon/ntc_thermistor.c b/drivers/hwmon/ntc_thermistor.c index cedb3ee0f762..ed638ebd0923 100644 --- a/drivers/hwmon/ntc_thermistor.c +++ b/drivers/hwmon/ntc_thermistor.c @@ -26,25 +26,6 @@ enum ntc_thermistor_type { TYPE_NCPXXXH103, }; -struct ntc_thermistor_platform_data { - /* - * pullup_uV, pullup_ohm, pulldown_ohm, and connect are required. - * - * How to setup pullup_ohm, pulldown_ohm, and connect is - * described at Documentation/hwmon/ntc_thermistor.rst - * - * pullup/down_ohm: 0 for infinite / not-connected - * - * chan: iio_channel pointer to communicate with the ADC which the - * thermistor is using for conversion of the analog values. - */ - unsigned int pullup_uv; - unsigned int pullup_ohm; - unsigned int pulldown_ohm; - enum { NTC_CONNECTED_POSITIVE, NTC_CONNECTED_GROUND } connect; - struct iio_channel *chan; -}; - struct ntc_compensation { int temp_c; unsigned int ohm; @@ -337,15 +318,30 @@ static const struct ntc_type ntc_type[] = { NTC_TYPE(TYPE_NCPXXXH103, ncpXXxh103), }; +/* + * pullup_uV, pullup_ohm, pulldown_ohm, and connect are required. + * + * How to setup pullup_ohm, pulldown_ohm, and connect is + * described at Documentation/hwmon/ntc_thermistor.rst + * + * pullup/down_ohm: 0 for infinite / not-connected + * + * chan: iio_channel pointer to communicate with the ADC which the + * thermistor is using for conversion of the analog values. + */ struct ntc_data { - struct ntc_thermistor_platform_data *pdata; const struct ntc_compensation *comp; int n_comp; + unsigned int pullup_uv; + unsigned int pullup_ohm; + unsigned int pulldown_ohm; + enum { NTC_CONNECTED_POSITIVE, NTC_CONNECTED_GROUND } connect; + struct iio_channel *chan; }; -static int ntc_adc_iio_read(struct ntc_thermistor_platform_data *pdata) +static int ntc_adc_iio_read(struct ntc_data *data) { - struct iio_channel *channel = pdata->chan; + struct iio_channel *channel = data->chan; int uv, ret; ret = iio_read_channel_processed_scale(channel, &uv, 1000); @@ -365,7 +361,7 @@ static int ntc_adc_iio_read(struct ntc_thermistor_platform_data *pdata) ret = iio_convert_raw_to_processed(channel, raw, &uv, 1000); if (ret < 0) { /* Assume 12 bit ADC with vref at pullup_uv */ - uv = (pdata->pullup_uv * (s64)raw) >> 12; + uv = (data->pullup_uv * (s64)raw) >> 12; } } @@ -407,20 +403,19 @@ static const struct of_device_id ntc_match[] = { }; MODULE_DEVICE_TABLE(of, ntc_match); -static struct ntc_thermistor_platform_data * -ntc_thermistor_parse_dt(struct device *dev) +static struct ntc_data *ntc_thermistor_parse_dt(struct device *dev) { + struct ntc_data *data; struct iio_channel *chan; enum iio_chan_type type; struct device_node *np = dev->of_node; - struct ntc_thermistor_platform_data *pdata; int ret; if (!np) return NULL; - pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); - if (!pdata) + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) return ERR_PTR(-ENOMEM); chan = devm_iio_channel_get(dev, NULL); @@ -434,21 +429,21 @@ ntc_thermistor_parse_dt(struct device *dev) if (type != IIO_VOLTAGE) return ERR_PTR(-EINVAL); - if (of_property_read_u32(np, "pullup-uv", &pdata->pullup_uv)) + if (of_property_read_u32(np, "pullup-uv", &data->pullup_uv)) return ERR_PTR(-ENODEV); - if (of_property_read_u32(np, "pullup-ohm", &pdata->pullup_ohm)) + if (of_property_read_u32(np, "pullup-ohm", &data->pullup_ohm)) return ERR_PTR(-ENODEV); - if (of_property_read_u32(np, "pulldown-ohm", &pdata->pulldown_ohm)) + if (of_property_read_u32(np, "pulldown-ohm", &data->pulldown_ohm)) return ERR_PTR(-ENODEV); if (of_find_property(np, "connected-positive", NULL)) - pdata->connect = NTC_CONNECTED_POSITIVE; + data->connect = NTC_CONNECTED_POSITIVE; else /* status change should be possible if not always on. */ - pdata->connect = NTC_CONNECTED_GROUND; + data->connect = NTC_CONNECTED_GROUND; - pdata->chan = chan; + data->chan = chan; - return pdata; + return data; } static inline u64 div64_u64_safe(u64 dividend, u64 divisor) @@ -462,24 +457,23 @@ static inline u64 div64_u64_safe(u64 dividend, u64 divisor) static int get_ohm_of_thermistor(struct ntc_data *data, unsigned int uv) { - struct ntc_thermistor_platform_data *pdata = data->pdata; - u32 puv = pdata->pullup_uv; + u32 puv = data->pullup_uv; u64 n, puo, pdo; - puo = pdata->pullup_ohm; - pdo = pdata->pulldown_ohm; + puo = data->pullup_ohm; + pdo = data->pulldown_ohm; if (uv == 0) - return (pdata->connect == NTC_CONNECTED_POSITIVE) ? + return (data->connect == NTC_CONNECTED_POSITIVE) ? INT_MAX : 0; if (uv >= puv) - return (pdata->connect == NTC_CONNECTED_POSITIVE) ? + return (data->connect == NTC_CONNECTED_POSITIVE) ? 0 : INT_MAX; - if (pdata->connect == NTC_CONNECTED_POSITIVE && puo == 0) + if (data->connect == NTC_CONNECTED_POSITIVE && puo == 0) n = div_u64(pdo * (puv - uv), uv); - else if (pdata->connect == NTC_CONNECTED_GROUND && pdo == 0) + else if (data->connect == NTC_CONNECTED_GROUND && pdo == 0) n = div_u64(puo * uv, puv - uv); - else if (pdata->connect == NTC_CONNECTED_POSITIVE) + else if (data->connect == NTC_CONNECTED_POSITIVE) n = div64_u64_safe(pdo * puo * (puv - uv), puo * uv - pdo * (puv - uv)); else @@ -579,7 +573,7 @@ static int ntc_thermistor_get_ohm(struct ntc_data *data) { int read_uv; - read_uv = ntc_adc_iio_read(data->pdata); + read_uv = ntc_adc_iio_read(data); if (read_uv < 0) return read_uv; return get_ohm_of_thermistor(data, read_uv); @@ -650,38 +644,31 @@ static int ntc_thermistor_probe(struct platform_device *pdev) const struct of_device_id *of_id = of_match_device(of_match_ptr(ntc_match), dev); const struct platform_device_id *pdev_id; - struct ntc_thermistor_platform_data *pdata; struct device *hwmon_dev; struct ntc_data *data; - pdata = ntc_thermistor_parse_dt(dev); - if (IS_ERR(pdata)) - return PTR_ERR(pdata); + data = ntc_thermistor_parse_dt(dev); + if (IS_ERR(data)) + return PTR_ERR(data); - if (!pdata) { + if (!data) { dev_err(dev, "No platform init data supplied.\n"); return -ENODEV; } - if (pdata->pullup_uv == 0 || - (pdata->pullup_ohm == 0 && pdata->connect == + if (data->pullup_uv == 0 || + (data->pullup_ohm == 0 && data->connect == NTC_CONNECTED_GROUND) || - (pdata->pulldown_ohm == 0 && pdata->connect == + (data->pulldown_ohm == 0 && data->connect == NTC_CONNECTED_POSITIVE) || - (pdata->connect != NTC_CONNECTED_POSITIVE && - pdata->connect != NTC_CONNECTED_GROUND)) { + (data->connect != NTC_CONNECTED_POSITIVE && + data->connect != NTC_CONNECTED_GROUND)) { dev_err(dev, "Required data to use NTC driver not supplied.\n"); return -EINVAL; } - data = devm_kzalloc(dev, sizeof(struct ntc_data), GFP_KERNEL); - if (!data) - return -ENOMEM; - pdev_id = of_id ? of_id->data : platform_get_device_id(pdev); - data->pdata = pdata; - if (pdev_id->driver_data >= ARRAY_SIZE(ntc_type)) { dev_err(dev, "Unknown device type: %lu(%s)\n", pdev_id->driver_data, pdev_id->name); |