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Date: Mon, 19 Nov 2018 09:07:32 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: Peter Rosin <peda@...ntia.se>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Jean Delvare <jdelvare@...e.com>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
"linux-hwmon@...r.kernel.org" <linux-hwmon@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH 2/2] hwmon: (ntc_thermistor): add support for B57891S0103
from Epcos
On Sat, Nov 17, 2018 at 12:13:00PM +0000, Peter Rosin wrote:
> More of the same...
>
> Signed-off-by: Peter Rosin <peda@...ntia.se>
> ---
> drivers/hwmon/Kconfig | 3 +-
> drivers/hwmon/ntc_thermistor.c | 57 +++++++++++++++++++++++++++-
> include/linux/platform_data/ntc_thermistor.h | 1 +
> 3 files changed, 58 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
> index f10840ad465c..5438cecace22 100644
> --- a/drivers/hwmon/Kconfig
> +++ b/drivers/hwmon/Kconfig
> @@ -1206,7 +1206,8 @@ config SENSORS_NTC_THERMISTOR
>
> Currently, this driver supports
> NCP15WB473, NCP18WB473, NCP21WB473, NCP03WB473, NCP15WL333,
> - NCP03WF104 and NCP15XH103 from Murata and B57330V2103 from EPCOS.
> + NCP03WF104 and NCP15XH103 from Murata and B57330V2103 and
> + B57891S0103 from EPCOS.
>
> This driver can also be built as a module. If so, the module
> will be called ntc-thermistor.
> diff --git a/drivers/hwmon/ntc_thermistor.c b/drivers/hwmon/ntc_thermistor.c
> index c52d07c6b49f..e0c6b2f244a6 100644
> --- a/drivers/hwmon/ntc_thermistor.c
> +++ b/drivers/hwmon/ntc_thermistor.c
> @@ -55,6 +55,7 @@ static const struct platform_device_id ntc_thermistor_id[] = {
> { "b57330v2103", TYPE_B57330V2103},
> { "ncp03wf104", TYPE_NCPXXWF104 },
> { "ncp15xh103", TYPE_NCPXXXH103 },
> + { "b57891s0103", TYPE_B57891S0103 },
> { },
> };
>
> @@ -212,8 +213,8 @@ static const struct ntc_compensation ncpXXxh103[] = {
> };
>
> /*
> - * The following compensation table is from the specification of EPCOS NTC
> - * Thermistors Datasheet
> + * The following compensation tables are from the specifications in EPCOS NTC
> + * Thermistors Datasheets
> */
> static const struct ntc_compensation b57330v2103[] = {
> { .temp_c = -40, .ohm = 190030 },
> @@ -252,6 +253,52 @@ static const struct ntc_compensation b57330v2103[] = {
> { .temp_c = 125, .ohm = 531 },
> };
>
> +static const struct ntc_compensation b57891s0103[] = {
> + { .temp_c = -55.0, .ohm = 878900 },
> + { .temp_c = -50.0, .ohm = 617590 },
> + { .temp_c = -45.0, .ohm = 439340 },
> + { .temp_c = -40.0, .ohm = 316180 },
> + { .temp_c = -35.0, .ohm = 230060 },
> + { .temp_c = -30.0, .ohm = 169150 },
> + { .temp_c = -25.0, .ohm = 125550 },
> + { .temp_c = -20.0, .ohm = 94143 },
> + { .temp_c = -15.0, .ohm = 71172 },
> + { .temp_c = -10.0, .ohm = 54308 },
> + { .temp_c = -5.0, .ohm = 41505 },
> + { .temp_c = 0.0, .ohm = 32014 },
> + { .temp_c = 5.0, .ohm = 25011 },
> + { .temp_c = 10.0, .ohm = 19691 },
> + { .temp_c = 15.0, .ohm = 15618 },
> + { .temp_c = 20.0, .ohm = 12474 },
> + { .temp_c = 25.0, .ohm = 10000 },
> + { .temp_c = 30.0, .ohm = 8080 },
> + { .temp_c = 35.0, .ohm = 6569 },
> + { .temp_c = 40.0, .ohm = 5372 },
> + { .temp_c = 45.0, .ohm = 4424 },
> + { .temp_c = 50.0, .ohm = 3661 },
> + { .temp_c = 55.0, .ohm = 3039 },
> + { .temp_c = 60.0, .ohm = 2536 },
> + { .temp_c = 65.0, .ohm = 2128 },
> + { .temp_c = 70.0, .ohm = 1794 },
> + { .temp_c = 75.0, .ohm = 1518 },
> + { .temp_c = 80.0, .ohm = 1290 },
> + { .temp_c = 85.0, .ohm = 1100 },
> + { .temp_c = 90.0, .ohm = 942 },
> + { .temp_c = 95.0, .ohm = 809 },
> + { .temp_c = 100.0, .ohm = 697 },
> + { .temp_c = 105.0, .ohm = 604 },
> + { .temp_c = 110.0, .ohm = 525 },
> + { .temp_c = 115.0, .ohm = 457 },
> + { .temp_c = 120.0, .ohm = 400 },
> + { .temp_c = 125.0, .ohm = 351 },
> + { .temp_c = 130.0, .ohm = 308 },
> + { .temp_c = 135.0, .ohm = 272 },
> + { .temp_c = 140.0, .ohm = 240 },
> + { .temp_c = 145.0, .ohm = 213 },
> + { .temp_c = 150.0, .ohm = 189 },
> + { .temp_c = 155.0, .ohm = 168 },
> +};
> +
> struct ntc_data {
> struct ntc_thermistor_platform_data *pdata;
> const struct ntc_compensation *comp;
> @@ -296,6 +343,8 @@ static const struct of_device_id ntc_match[] = {
> .data = &ntc_thermistor_id[6] },
> { .compatible = "murata,ncp15xh103",
> .data = &ntc_thermistor_id[7] },
> + { .compatible = "epcos,b57891s0103",
> + .data = &ntc_thermistor_id[8] },
>
> /* Usage of vendor name "ntc" is deprecated */
> { .compatible = "ntc,ncp15wb473",
> @@ -627,6 +676,10 @@ static int ntc_thermistor_probe(struct platform_device *pdev)
> data->comp = ncpXXxh103;
> data->n_comp = ARRAY_SIZE(ncpXXxh103);
> break;
> + case TYPE_B57891S0103:
> + data->comp = b57891s0103;
> + data->n_comp = ARRAY_SIZE(b57891s0103);
> + break;
> default:
> dev_err(dev, "Unknown device type: %lu(%s)\n",
> pdev_id->driver_data, pdev_id->name);
> diff --git a/include/linux/platform_data/ntc_thermistor.h b/include/linux/platform_data/ntc_thermistor.h
> index 698d0d59db76..231a27c302ec 100644
> --- a/include/linux/platform_data/ntc_thermistor.h
> +++ b/include/linux/platform_data/ntc_thermistor.h
> @@ -29,6 +29,7 @@ enum ntc_thermistor_type {
> TYPE_B57330V2103,
> TYPE_NCPXXWF104,
> TYPE_NCPXXXH103,
> + TYPE_B57891S0103,
Guess I deserve the non-alphabetic order as penalty for not enforcing it
earlier. I'll accept the patch after DT approval and submit another one
myself afterwards to restore alphabetic order.
Guenter
> };
>
> struct ntc_thermistor_platform_data {
> --
> 2.11.0
>
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