From mboxrd@z Thu Jan 1 00:00:00 1970 From: Subject: [PATCH v4 4/4] pmbus: ltc2978: add regulator support Date: Wed, 1 Oct 2014 15:18:20 -0500 Message-ID: <1412194700-2283-1-git-send-email-atull@opensource.altera.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Sender: linux-kernel-owner@vger.kernel.org To: linux@roeck-us.net, jdelvare@suse.de Cc: lm-sensors@lm-sensors.org, lgirdwood@gmail.com, broonie@kernel.org, robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, delicious.quinoa@gmail.com, dinguyen@opensource.altera.com, yvanderv@opensource.altera.com, Alan Tull List-Id: devicetree@vger.kernel.org From: Alan Tull Add simple on/off regulator support for ltc2978 and other pmbus parts supported by ltc2978.c Signed-off-by: Alan Tull v2: Remove '#include ' Only one regulator per pmbus device Get regulator_init_data from pdata or device tree v3: Support multiple regulators for each chip Move most code to pmbus_core.c fixed values for on/off v4: fix a #endif comment simplify probe code, remove added switch statement remove BUG_ON(), add error message and fix num_regulators --- drivers/hwmon/pmbus/Kconfig | 7 +++++++ drivers/hwmon/pmbus/ltc2978.c | 37 +++++++++++++++++++++++++++++++++++++ 2 files changed, 44 insertions(+) diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index 6e1e493..79117b7 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -56,6 +56,13 @@ config SENSORS_LTC2978 This driver can also be built as a module. If so, the module will be called ltc2978. +config SENSORS_LTC2978_REGULATOR + boolean "Regulator support for LTC2974, LTC2978, LTC3880, and LTC3883" + depends on SENSORS_LTC2978 && REGULATOR + help + If you say yes here you get regulator support for Linear + Technology LTC2974, LTC2978, LTC3880, and LTC3883. + config SENSORS_MAX16064 tristate "Maxim MAX16064" default n diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c index e24ed52..422712e 100644 --- a/drivers/hwmon/pmbus/ltc2978.c +++ b/drivers/hwmon/pmbus/ltc2978.c @@ -22,6 +22,8 @@ #include #include #include +#include +#include #include "pmbus.h" enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883, ltm4676 }; @@ -374,6 +376,30 @@ static const struct i2c_device_id ltc2978_id[] = { }; MODULE_DEVICE_TABLE(i2c, ltc2978_id); +#if IS_ENABLED(CONFIG_SENSORS_LTC2978_REGULATOR) +static const struct regulator_desc ltc2978_reg_desc[] = { + PMBUS_REGULATOR("vout_en", 0), + PMBUS_REGULATOR("vout_en", 1), + PMBUS_REGULATOR("vout_en", 2), + PMBUS_REGULATOR("vout_en", 3), + PMBUS_REGULATOR("vout_en", 4), + PMBUS_REGULATOR("vout_en", 5), + PMBUS_REGULATOR("vout_en", 6), + PMBUS_REGULATOR("vout_en", 7), +}; + +static struct of_regulator_match ltc2978_reg_matches[] = { + { .name = "vout_en0" }, + { .name = "vout_en1" }, + { .name = "vout_en2" }, + { .name = "vout_en3" }, + { .name = "vout_en4" }, + { .name = "vout_en5" }, + { .name = "vout_en6" }, + { .name = "vout_en7" }, +}; +#endif /* CONFIG_SENSORS_LTC2978_REGULATOR */ + static int ltc2978_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -487,6 +513,17 @@ static int ltc2978_probe(struct i2c_client *client, default: return -ENODEV; } + +#if IS_ENABLED(CONFIG_SENSORS_LTC2978_REGULATOR) + info->num_regulators = info->pages; + info->reg_desc = ltc2978_reg_desc; + info->reg_matches = ltc2978_reg_matches; + if (info->num_regulators > ARRAY_SIZE(ltc2978_reg_desc)) { + dev_err(&client->dev, "num_regulators too large!"); + info->num_regulators = ARRAY_SIZE(ltc2978_reg_desc); + } +#endif + return pmbus_do_probe(client, id, info); } -- 1.7.9.5