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authorZhu, Richard \(NSN - CN/Beijing\) <richard.zhu@nsn.com>2014-07-01 07:14:23 +0000
committerGuenter Roeck <linux@roeck-us.net>2014-08-04 07:01:38 -0700
commita8bfeceb0c1400b9331c00f6969afa6cb82d5d4a (patch)
treeb0774f9e62c7af6ae14f9da24e334208e8ab2d1e /drivers/hwmon/pmbus
parent012cb5e257dcce524ee6207e50ca494d8a2b6013 (diff)
downloadlinux-a8bfeceb0c1400b9331c00f6969afa6cb82d5d4a.tar.bz2
hwmon: (pmbus) Add tps40422 front-end driver
For TI power management chip TPS40422, READ_TEMPERATURE_2 command is supported on page 1 of the chip, but the original driver(pmbus.c) only tried to detect this command on page 0, this will lead to a result that the temperature sensor in page 1 couldn't be detected. This change is to isolate the tps40422 driver from pmbus.c into a solo front-end driver. Signed-off-by: Zhu Laiwen <richard.zhu@nsn.com> [Guenter Roeck: Dropped unnecessary license text (fixes checkpatch warning)] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/pmbus')
-rw-r--r--drivers/hwmon/pmbus/Kconfig13
-rw-r--r--drivers/hwmon/pmbus/Makefile1
-rw-r--r--drivers/hwmon/pmbus/pmbus.c1
-rw-r--r--drivers/hwmon/pmbus/tps40422.c64
4 files changed, 76 insertions, 3 deletions
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 39cc63edfbb0..6e1e4935fc62 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -20,8 +20,7 @@ config SENSORS_PMBUS
help
If you say yes here you get hardware monitoring support for generic
PMBus devices, including but not limited to ADP4000, BMR453, BMR454,
- MDT040, NCP4200, NCP4208, PDT003, PDT006, PDT012, UDT020, TPS40400,
- and TPS40422.
+ MDT040, NCP4200, NCP4208, PDT003, PDT006, PDT012, UDT020, and TPS40400.
This driver can also be built as a module. If so, the module will
be called pmbus.
@@ -87,6 +86,16 @@ config SENSORS_MAX8688
This driver can also be built as a module. If so, the module will
be called max8688.
+config SENSORS_TPS40422
+ tristate "TI TPS40422"
+ default n
+ help
+ If you say yes here you get hardware monitoring support for TI
+ TPS40422.
+
+ This driver can also be built as a module. If so, the module will
+ be called tps40422.
+
config SENSORS_UCD9000
tristate "TI UCD90120, UCD90124, UCD9090, UCD90910"
default n
diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
index 789376c85dbb..1454293e985c 100644
--- a/drivers/hwmon/pmbus/Makefile
+++ b/drivers/hwmon/pmbus/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_SENSORS_LTC2978) += ltc2978.o
obj-$(CONFIG_SENSORS_MAX16064) += max16064.o
obj-$(CONFIG_SENSORS_MAX34440) += max34440.o
obj-$(CONFIG_SENSORS_MAX8688) += max8688.o
+obj-$(CONFIG_SENSORS_TPS40422) += tps40422.o
obj-$(CONFIG_SENSORS_UCD9000) += ucd9000.o
obj-$(CONFIG_SENSORS_UCD9200) += ucd9200.o
obj-$(CONFIG_SENSORS_ZL6100) += zl6100.o
diff --git a/drivers/hwmon/pmbus/pmbus.c b/drivers/hwmon/pmbus/pmbus.c
index 7e91700131a7..554d0249dcde 100644
--- a/drivers/hwmon/pmbus/pmbus.c
+++ b/drivers/hwmon/pmbus/pmbus.c
@@ -193,7 +193,6 @@ static const struct i2c_device_id pmbus_id[] = {
{"pdt012", 1},
{"pmbus", 0},
{"tps40400", 1},
- {"tps40422", 2},
{"udt020", 1},
{}
};
diff --git a/drivers/hwmon/pmbus/tps40422.c b/drivers/hwmon/pmbus/tps40422.c
new file mode 100644
index 000000000000..32803825d47e
--- /dev/null
+++ b/drivers/hwmon/pmbus/tps40422.c
@@ -0,0 +1,64 @@
+/*
+ * Hardware monitoring driver for TI TPS40422
+ *
+ * Copyright (c) 2014 Nokia Solutions and Networks.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include "pmbus.h"
+
+static struct pmbus_driver_info tps40422_info = {
+ .pages = 2,
+ .format[PSC_VOLTAGE_IN] = linear,
+ .format[PSC_VOLTAGE_OUT] = linear,
+ .format[PSC_TEMPERATURE] = linear,
+ .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_TEMP2
+ | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_TEMP
+ | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
+ .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_TEMP2
+ | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_TEMP
+ | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
+};
+
+static int tps40422_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ return pmbus_do_probe(client, id, &tps40422_info);
+}
+
+static const struct i2c_device_id tps40422_id[] = {
+ {"tps40422", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, tps40422_id);
+
+/* This is the driver that will be inserted */
+static struct i2c_driver tps40422_driver = {
+ .driver = {
+ .name = "tps40422",
+ },
+ .probe = tps40422_probe,
+ .remove = pmbus_do_remove,
+ .id_table = tps40422_id,
+};
+
+module_i2c_driver(tps40422_driver);
+
+MODULE_AUTHOR("Zhu Laiwen <richard.zhu@nsn.com>");
+MODULE_DESCRIPTION("PMBus driver for TI TPS40422");
+MODULE_LICENSE("GPL");