hwmon: (lm70) Add support for TI TMP122/124
Add support for Texas Instruments TMP122/124 which are nearly identical to their TMP121/123 except that they also support programmable temperature thresholds. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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@ -4,6 +4,7 @@ Required properties:
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- compatible: one of
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"ti,lm70"
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"ti,tmp121"
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"ti,tmp122"
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"ti,lm71"
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"ti,lm74"
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@ -6,6 +6,8 @@ Supported chips:
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Datasheet: http://www.national.com/pf/LM/LM70.html
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* Texas Instruments TMP121/TMP123
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Information: http://focus.ti.com/docs/prod/folders/print/tmp121.html
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* Texas Instruments TMP122/TMP124
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Information: http://www.ti.com/product/tmp122
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* National Semiconductor LM71
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Datasheet: http://www.ti.com/product/LM71
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* National Semiconductor LM74
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@ -35,8 +37,10 @@ As a real (in-tree) example of this "SPI protocol driver" interfacing
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with a "SPI master controller driver", see drivers/spi/spi_lm70llp.c
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and its associated documentation.
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The LM74 and TMP121/TMP123 are very similar; main difference is 13-bit
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temperature data (0.0625 degrees celsius resolution).
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The LM74 and TMP121/TMP122/TMP123/TMP124 are very similar; main difference is
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13-bit temperature data (0.0625 degrees celsius resolution).
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The TMP122/TMP124 also feature configurable temperature thresholds.
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The LM71 is also very similar; main difference is 14-bit temperature
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data (0.03125 degrees celsius resolution).
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@ -46,6 +46,7 @@
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#define LM70_CHIP_TMP121 1 /* TI TMP121/TMP123 */
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#define LM70_CHIP_LM71 2 /* NS LM71 */
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#define LM70_CHIP_LM74 3 /* NS LM74 */
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#define LM70_CHIP_TMP122 4 /* TI TMP122/TMP124 */
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struct lm70 {
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struct spi_device *spi;
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@ -92,7 +93,7 @@ static ssize_t temp1_input_show(struct device *dev,
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* Celsius.
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* So it's equivalent to multiplying by 0.25 * 1000 = 250.
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*
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* LM74 and TMP121/TMP123:
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* LM74 and TMP121/TMP122/TMP123/TMP124:
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* 13 bits of 2's complement data, discard LSB 3 bits,
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* resolution 0.0625 degrees celsius.
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*
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@ -106,6 +107,7 @@ static ssize_t temp1_input_show(struct device *dev,
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break;
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case LM70_CHIP_TMP121:
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case LM70_CHIP_TMP122:
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case LM70_CHIP_LM74:
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val = ((int)raw / 8) * 625 / 10;
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break;
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@ -142,6 +144,10 @@ static const struct of_device_id lm70_of_ids[] = {
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.compatible = "ti,tmp121",
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.data = (void *) LM70_CHIP_TMP121,
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},
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{
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.compatible = "ti,tmp122",
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.data = (void *) LM70_CHIP_TMP122,
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},
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{
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.compatible = "ti,lm71",
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.data = (void *) LM70_CHIP_LM71,
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@ -191,6 +197,7 @@ static int lm70_probe(struct spi_device *spi)
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static const struct spi_device_id lm70_ids[] = {
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{ "lm70", LM70_CHIP_LM70 },
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{ "tmp121", LM70_CHIP_TMP121 },
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{ "tmp122", LM70_CHIP_TMP122 },
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{ "lm71", LM70_CHIP_LM71 },
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{ "lm74", LM70_CHIP_LM74 },
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{ },
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