* [lm-sensors] [PATCH] hwmon: (lm90) Add device tree support @ 2013-02-01 21:18 ` Vincent Palatin 0 siblings, 0 replies; 7+ messages in thread From: Vincent Palatin @ 2013-02-01 21:18 UTC (permalink / raw) To: Jean Delvare, lm-sensors Cc: Grant Likely, Rob Herring, Guenter Roeck, Vincent Palatin, linux-kernel, Olof Johansson, Sameer Nanda QWRkIHN1cHBvcnQgdG8gaW5zdGFudGlhdGUgTE05MC1jb21wYXRpYmxlIHNlbnNvcnMgZnJvbSBh IGRldmljZS10cmVlCmNvbmZpZ3VyYXRpb24uCldoZW4gdGhlIGtlcm5lbCBoYXMgZGV2aWNlIHRy ZWUgc3VwcG9ydCwgd2UgYXZvaWQgZG9pbmcgdGhlIGF1dG8tZGV0ZWN0aW9uCmFzIHByb2Jpbmcg dGhlIGJ1c3NlcyBtaWdodCBtZXNzLXVwIHNlbnNpdGl2ZSBJMkMgZGV2aWNlcyBvciB0cmlnZ2Vy IGxvbmcKdGltZW91dHMgb24gbm9uLWZ1bmN0aW9uYWwgYnVzc2VzLgoKU2lnbmVkLW9mZi1ieTog VmluY2VudCBQYWxhdGluIDx2cGFsYXRpbkBjaHJvbWl1bS5vcmc+Ci0tLQogLi4uL2RldmljZXRy ZWUvYmluZGluZ3MvaTJjL3RyaXZpYWwtZGV2aWNlcy50eHQgICAgfCAxOSArKysrKysrKysKIC4u Li9kZXZpY2V0cmVlL2JpbmRpbmdzL3ZlbmRvci1wcmVmaXhlcy50eHQgICAgICAgIHwgIDEgKwog 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* [PATCH] hwmon: (lm90) Add device tree support @ 2013-02-01 21:18 ` Vincent Palatin 0 siblings, 0 replies; 7+ messages in thread From: Vincent Palatin @ 2013-02-01 21:18 UTC (permalink / raw) To: Jean Delvare, lm-sensors Cc: Grant Likely, Rob Herring, Guenter Roeck, Vincent Palatin, linux-kernel, Olof Johansson, Sameer Nanda Add support to instantiate LM90-compatible sensors from a device-tree configuration. When the kernel has device tree support, we avoid doing the auto-detection as probing the busses might mess-up sensitive I2C devices or trigger long timeouts on non-functional busses. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> --- .../devicetree/bindings/i2c/trivial-devices.txt | 19 +++++++++ .../devicetree/bindings/vendor-prefixes.txt | 1 + drivers/hwmon/lm90.c | 47 +++++++++++++++++++++- 3 files changed, 65 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/i2c/trivial-devices.txt b/Documentation/devicetree/bindings/i2c/trivial-devices.txt index 446859f..4d991ca 100644 --- a/Documentation/devicetree/bindings/i2c/trivial-devices.txt +++ b/Documentation/devicetree/bindings/i2c/trivial-devices.txt @@ -10,6 +10,7 @@ document for it just like any other devices. Compatible Vendor / Chip ========== ============= ad,ad7414 SMBus/I2C Digital Temperature Sensor in 6-Pin SOT with SMBus Alert and Over Temperature Pin +ad,adm1032 +/-1C Remote and local system temperature monitor ad,adm9240 ADM9240: Complete System Hardware Monitor for uProcessor-Based Systems adi,adt7461 +/-1C TDM Extended Temp Range I.C adt7461 +/-1C TDM Extended Temp Range I.C @@ -35,16 +36,33 @@ fsl,mc13892 MC13892: Power Management Integrated Circuit (PMIC) for i.MX35/51 fsl,mma8450 MMA8450Q: Xtrinsic Low-power, 3-axis Xtrinsic Accelerometer fsl,mpr121 MPR121: Proximity Capacitive Touch Sensor Controller fsl,sgtl5000 SGTL5000: Ultra Low-Power Audio Codec +gmt,g781 +/-1C Remote and local temperature sensor maxim,ds1050 5 Bit Programmable, Pulse-Width Modulator maxim,max1237 Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs maxim,max6625 9-Bit/12-Bit Temperature Sensors with I²C-Compatible Serial Interface +maxim,max6646 +145C Precision SMBus-Compatible Remote/Local Sensors +maxim,max6647 +145C Precision SMBus-Compatible Remote/Local Sensors +maxim,max6649 +145C Precision SMBus-Compatible Remote/Local Sensors +maxim,max6657 +/-1C SMBus-Compatible Remote/Local Sensors +maxim,max6658 +/-1C SMBus-Compatible Remote/Local Sensors +maxim,max6659 +/-1C SMBus-Compatible Remote/Local Sensors +maxim,max6680 +/-1C Fail-Safe Remote/Local Temperature Sensors +maxim,max6681 +/-1C Fail-Safe Remote/Local Temperature Sensors +maxim,max6695 Dual Remote/Local Temperature Sensors +maxim,max6696 Dual Remote/Local Temperature Sensors mc,rv3029c2 Real Time Clock Module with I2C-Bus national,lm75 I2C TEMP SENSOR national,lm80 Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor +national,lm86 +/-0.75C Accurate, Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface +national,lm89 +/-0.75C Remote and Local Digital Temperature Sensor with Two-Wire Interface-Wire Interface +national,lm90 +/-3C Accurate, Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface national,lm92 ±0.33°C Accurate, 12-Bit + Sign Temperature Sensor and Thermal Window Comparator with Two-Wire Interface +national,lm99 +/-1C Accurate, Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface nxp,pca9556 Octal SMBus and I2C registered interface nxp,pca9557 8-bit I2C-bus and SMBus I/O port with reset nxp,pcf8563 Real-time clock/calendar +nxp,sa56004 remote/local digital temperature sensor with overtemperature alarms +onnn,nct1008 +/-1C Temperature Monitor with Series Resistance Cancellation ovti,ov5642 OV5642: Color CMOS QSXGA (5-megapixel) Image Sensor with OmniBSI and Embedded TrueFocus pericom,pt7c4338 Real-time Clock Module plx,pex8648 48-Lane, 12-Port PCI Express Gen 2 (5.0 GT/s) Switch @@ -59,3 +77,4 @@ taos,tsl2550 Ambient Light Sensor with SMBUS/Two Wire Serial Interface ti,tsc2003 I2C Touch-Screen Controller ti,tmp102 Low Power Digital Temperature Sensor with SMBUS/Two Wire Serial Interface ti,tmp275 Digital Temperature Sensor +winbond,w83l771 H/W Monitor IC diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index 902b1b1..2074699 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -23,6 +23,7 @@ est ESTeem Wireless Modems fsl Freescale Semiconductor GEFanuc GE Fanuc Intelligent Platforms Embedded Systems, Inc. gef GE Fanuc Intelligent Platforms Embedded Systems, Inc. +gmt Global Mixed-mode Technology Inc. hp Hewlett Packard ibm International Business Machines (IBM) idt Integrated Device Technologies, Inc. diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c index 863412a..c07fd19 100644 --- a/drivers/hwmon/lm90.c +++ b/drivers/hwmon/lm90.c @@ -106,8 +106,11 @@ */ static const unsigned short normal_i2c[] = { +#ifndef CONFIG_OF 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c, - 0x4d, 0x4e, 0x4f, I2C_CLIENT_END }; + 0x4d, 0x4e, 0x4f, +#endif + I2C_CLIENT_END }; enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680, max6646, w83l771, max6696, sa56004, g781 }; @@ -209,6 +212,32 @@ static const struct i2c_device_id lm90_id[] = { }; MODULE_DEVICE_TABLE(i2c, lm90_id); +#ifdef CONFIG_OF +static struct of_device_id lm90_dt_match[] = { + { .compatible = "ad,adm1032", .data = (void *)adm1032 }, + { .compatible = "adi,adt7461", .data = (void *)adt7461 }, + { .compatible = "gmt,g781", .data = (void *)g781 }, + { .compatible = "national,lm90", .data = (void *)lm90 }, + { .compatible = "national,lm86", .data = (void *)lm86 }, + { .compatible = "national,lm89", .data = (void *)lm86 }, + { .compatible = "national,lm99", .data = (void *)lm99 }, + { .compatible = "maxim,max6646", .data = (void *)max6646 }, + { .compatible = "maxim,max6647", .data = (void *)max6646 }, + { .compatible = "maxim,max6649", .data = (void *)max6646 }, + { .compatible = "maxim,max6657", .data = (void *)max6657 }, + { .compatible = "maxim,max6658", .data = (void *)max6657 }, + { .compatible = "maxim,max6659", .data = (void *)max6659 }, + { .compatible = "maxim,max6680", .data = (void *)max6680 }, + { .compatible = "maxim,max6681", .data = (void *)max6680 }, + { .compatible = "maxim,max6695", .data = (void *)max6696 }, + { .compatible = "maxim,max6696", .data = (void *)max6696 }, + { .compatible = "onnn,nct1008", .data = (void *)adt7461 }, + { .compatible = "winbond,w83l771", .data = (void *)w83l771 }, + { .compatible = "nxp,sa56004", .data = (void *)sa56004 }, + { } +}; +#endif + /* * chip type specific parameters */ @@ -1391,6 +1420,19 @@ static void lm90_init_client(struct i2c_client *client) i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config); } +static inline int lm90_get_driver_data(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ +#ifdef CONFIG_OF + if (i2c->dev.of_node) { + const struct of_device_id *match; + match = of_match_node(lm90_dt_match, i2c->dev.of_node); + return (int)match->data; + } +#endif + return (int)id->driver_data; +} + static int lm90_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -1407,7 +1449,7 @@ static int lm90_probe(struct i2c_client *client, mutex_init(&data->update_lock); /* Set the device type */ - data->kind = id->driver_data; + data->kind = lm90_get_driver_data(client, id); if (data->kind == adm1032) { if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) client->flags &= ~I2C_CLIENT_PEC; @@ -1533,6 +1575,7 @@ static struct i2c_driver lm90_driver = { .class = I2C_CLASS_HWMON, .driver = { .name = "lm90", + .of_match_table = of_match_ptr(lm90_dt_match), }, .probe = lm90_probe, .remove = lm90_remove, -- 1.8.1 ^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [lm-sensors] [PATCH] hwmon: (lm90) Add device tree support 2013-02-01 21:18 ` Vincent Palatin @ 2013-02-01 21:36 ` Guenter Roeck -1 siblings, 0 replies; 7+ messages in thread From: Guenter Roeck @ 2013-02-01 21:36 UTC (permalink / raw) To: Vincent Palatin Cc: Jean Delvare, lm-sensors, Grant Likely, Rob Herring, linux-kernel, Olof Johansson, Sameer Nanda On Fri, Feb 01, 2013 at 01:18:22PM -0800, Vincent Palatin wrote: > Add support to instantiate LM90-compatible sensors from a device-tree > configuration. > When the kernel has device tree support, we avoid doing the auto-detection > as probing the busses might mess-up sensitive I2C devices or trigger long > timeouts on non-functional busses. > > Signed-off-by: Vincent Palatin <vpalatin@chromium.org> Hi Vincent, OF support for I2C devices should already work through the I2C subsystem, without explicit driver patch. As for the detect function, I am not entirely sure if we want or should get rid of it just because OF is configured. That may have unintended side effects. Either case, I would argue that if we do want to do that, it should be done for _all_ I2C devices and not just for the lm90 driver. In other words, it should be done in the I2C subsystem, maybe with a separate configuration option. Thanks, Guenter _______________________________________________ lm-sensors mailing list lm-sensors@lm-sensors.org http://lists.lm-sensors.org/mailman/listinfo/lm-sensors ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] hwmon: (lm90) Add device tree support @ 2013-02-01 21:36 ` Guenter Roeck 0 siblings, 0 replies; 7+ messages in thread From: Guenter Roeck @ 2013-02-01 21:36 UTC (permalink / raw) To: Vincent Palatin Cc: Jean Delvare, lm-sensors, Grant Likely, Rob Herring, linux-kernel, Olof Johansson, Sameer Nanda On Fri, Feb 01, 2013 at 01:18:22PM -0800, Vincent Palatin wrote: > Add support to instantiate LM90-compatible sensors from a device-tree > configuration. > When the kernel has device tree support, we avoid doing the auto-detection > as probing the busses might mess-up sensitive I2C devices or trigger long > timeouts on non-functional busses. > > Signed-off-by: Vincent Palatin <vpalatin@chromium.org> Hi Vincent, OF support for I2C devices should already work through the I2C subsystem, without explicit driver patch. As for the detect function, I am not entirely sure if we want or should get rid of it just because OF is configured. That may have unintended side effects. Either case, I would argue that if we do want to do that, it should be done for _all_ I2C devices and not just for the lm90 driver. In other words, it should be done in the I2C subsystem, maybe with a separate configuration option. Thanks, Guenter ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [lm-sensors] [PATCH] hwmon: (lm90) Add device tree support 2013-02-01 21:36 ` Guenter Roeck @ 2013-02-01 21:57 ` Jean Delvare -1 siblings, 0 replies; 7+ messages in thread From: Jean Delvare @ 2013-02-01 21:57 UTC (permalink / raw) To: Guenter Roeck Cc: Vincent Palatin, lm-sensors, Grant Likely, Rob Herring, linux-kernel, Olof Johansson, Sameer Nanda On Fri, 1 Feb 2013 13:36:40 -0800, Guenter Roeck wrote: > On Fri, Feb 01, 2013 at 01:18:22PM -0800, Vincent Palatin wrote: > > When the kernel has device tree support, we avoid doing the auto-detection > > as probing the busses might mess-up sensitive I2C devices or trigger long > > timeouts on non-functional busses. > (...) > As for the detect function, I am not entirely sure if we want or should get > rid of it just because OF is configured. That may have unintended side effects. > Either case, I would argue that if we do want to do that, it should be done > for _all_ I2C devices and not just for the lm90 driver. In other words, it > should be done in the I2C subsystem, maybe with a separate configuration option. I can't think of any reason for doing that. Detection only happens on I2C buses which request it (by setting i2c_adapter.class.) I2C system bus drivers for OF-based platforms would simply not set any class flag, so detection won't be triggered on them. -- Jean Delvare _______________________________________________ lm-sensors mailing list lm-sensors@lm-sensors.org http://lists.lm-sensors.org/mailman/listinfo/lm-sensors ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] hwmon: (lm90) Add device tree support @ 2013-02-01 21:57 ` Jean Delvare 0 siblings, 0 replies; 7+ messages in thread From: Jean Delvare @ 2013-02-01 21:57 UTC (permalink / raw) To: Guenter Roeck Cc: Vincent Palatin, lm-sensors, Grant Likely, Rob Herring, linux-kernel, Olof Johansson, Sameer Nanda On Fri, 1 Feb 2013 13:36:40 -0800, Guenter Roeck wrote: > On Fri, Feb 01, 2013 at 01:18:22PM -0800, Vincent Palatin wrote: > > When the kernel has device tree support, we avoid doing the auto-detection > > as probing the busses might mess-up sensitive I2C devices or trigger long > > timeouts on non-functional busses. > (...) > As for the detect function, I am not entirely sure if we want or should get > rid of it just because OF is configured. That may have unintended side effects. > Either case, I would argue that if we do want to do that, it should be done > for _all_ I2C devices and not just for the lm90 driver. In other words, it > should be done in the I2C subsystem, maybe with a separate configuration option. I can't think of any reason for doing that. Detection only happens on I2C buses which request it (by setting i2c_adapter.class.) I2C system bus drivers for OF-based platforms would simply not set any class flag, so detection won't be triggered on them. -- Jean Delvare ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [lm-sensors] [PATCH] hwmon: (lm90) Add device tree support 2013-02-01 21:18 ` Vincent Palatin (?) (?) @ 2013-02-01 22:03 ` Vincent Palatin -1 siblings, 0 replies; 7+ messages in thread From: Vincent Palatin @ 2013-02-01 22:03 UTC (permalink / raw) To: lm-sensors [-- Attachment #1.1: Type: text/plain, Size: 1319 bytes --] On Fri, Feb 1, 2013 at 1:57 PM, Jean Delvare <khali@linux-fr.org> wrote: > On Fri, 1 Feb 2013 13:36:40 -0800, Guenter Roeck wrote: > > On Fri, Feb 01, 2013 at 01:18:22PM -0800, Vincent Palatin wrote: > > > When the kernel has device tree support, we avoid doing the > auto-detection > > > as probing the busses might mess-up sensitive I2C devices or trigger > long > > > timeouts on non-functional busses. > > (...) > > As for the detect function, I am not entirely sure if we want or should > get > > rid of it just because OF is configured. That may have unintended side > effects. > > Either case, I would argue that if we do want to do that, it should be > done > > for _all_ I2C devices and not just for the lm90 driver. In other words, > it > > should be done in the I2C subsystem, maybe with a separate configuration > option. > > I can't think of any reason for doing that. Detection only happens on > I2C buses which request it (by setting i2c_adapter.class.) I2C system > bus drivers for OF-based platforms would simply not set any class flag, > so detection won't be triggered on them. > > Thanks for the advice. I will try update the i2c adapter driver ( i2c-s3c2410.c in my case) to avoid hardcoding the class flags and maybe add some configuration depending on a device tree node property. -- Vincent [-- Attachment #1.2: Type: text/html, Size: 2009 bytes --] [-- Attachment #2: Type: text/plain, Size: 153 bytes --] _______________________________________________ lm-sensors mailing list lm-sensors@lm-sensors.org http://lists.lm-sensors.org/mailman/listinfo/lm-sensors ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2013-02-01 22:03 UTC | newest] Thread overview: 7+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2013-02-01 21:18 [lm-sensors] [PATCH] hwmon: (lm90) Add device tree support Vincent Palatin 2013-02-01 21:18 ` Vincent Palatin 2013-02-01 21:36 ` [lm-sensors] " Guenter Roeck 2013-02-01 21:36 ` Guenter Roeck 2013-02-01 21:57 ` [lm-sensors] " Jean Delvare 2013-02-01 21:57 ` Jean Delvare 2013-02-01 22:03 ` [lm-sensors] " Vincent Palatin
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