linux-kernel - [PATCH 1/3] mfd: da9063: Add HWMON dependencies

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Date:   Tue,  6 Jul 2021 00:01:55 +0000
From:   Vincent Pelletier <plr.vincent@...il.com>
To:     Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Jonathan Corbet <corbet@....net>,
        Support Opensource <support.opensource@...semi.com>,
        Lee Jones <lee.jones@...aro.org>, linux-hwmon@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Opensource [Steve Twiss]" <stwiss.opensource@...semi.com>
Subject: [PATCH 1/3] mfd: da9063: Add HWMON dependencies

From: "Opensource [Steve Twiss]" <stwiss.opensource@...semi.com>

Dependencies required for DA9063 HWMON support.

Signed-off-by: Opensource [Steve Twiss] <stwiss.opensource@...semi.com>

Directly set da9063->t_offset.
Let MFD probe succeed even if DA9063_REG_T_OFFSET cannot be read.

Signed-off-by: Vincent Pelletier <plr.vincent@...il.com>
---
Originally submitted by Steve Twiss in 2014:
  https://marc.info/?l=linux-kernel&m=139560864709852&w=2

 drivers/mfd/da9063-core.c       | 8 ++++++++
 include/linux/mfd/da9063/core.h | 3 +++
 2 files changed, 11 insertions(+)

diff --git a/drivers/mfd/da9063-core.c b/drivers/mfd/da9063-core.c
index df407c3afce3..14c2a8df9ae3 100644
--- a/drivers/mfd/da9063-core.c
+++ b/drivers/mfd/da9063-core.c
@@ -197,6 +197,14 @@ int da9063_device_init(struct da9063 *da9063, unsigned int irq)
 		}
 	}
 
+	ret = regmap_read(da9063->regmap, DA9063_REG_T_OFFSET, &da9063->t_offset);
+	if (ret < 0) {
+		da9063->t_offset = 0;
+		dev_warn(da9063->dev,
+			 "Temperature trimming value cannot be read (defaulting to 0)\n");
+		ret = 0;
+	}
+
 	return ret;
 }
 
diff --git a/include/linux/mfd/da9063/core.h b/include/linux/mfd/da9063/core.h
index fa7a43f02f27..c0c57c6f6230 100644
--- a/include/linux/mfd/da9063/core.h
+++ b/include/linux/mfd/da9063/core.h
@@ -85,6 +85,9 @@ struct da9063 {
 	int		chip_irq;
 	unsigned int	irq_base;
 	struct regmap_irq_chip_data *regmap_irq;
+
+	/* Trimming */
+	int		t_offset;
 };
 
 int da9063_device_init(struct da9063 *da9063, unsigned int irq);
-- 
2.32.0