linux-kernel - [PATCH v2 1/3] mfd: sec-core: Dump PMIC revision to find out the HW

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Date:	Wed, 07 Oct 2015 09:44:39 +0900
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Sangbeom Kim <sbkim73@...sung.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Lee Jones <lee.jones@...aro.org>, linux-kernel@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org
Cc:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Inki Dae <inki.dae@...sung.com>
Subject: [PATCH v2 1/3] mfd: sec-core: Dump PMIC revision to find out the HW

There are different revisions of the same chipset. For example S2MPS13 has
more than 2 revisions. They differ slightly in regulator constraints.
Print the revision number to easily find which PMIC is used on the board.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>

---

Changs since v1:
None.
---
 drivers/mfd/sec-core.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
index 2d1137a7a0ee..589e5efc2d7f 100644
--- a/drivers/mfd/sec-core.c
+++ b/drivers/mfd/sec-core.c
@@ -253,6 +253,15 @@ static const struct regmap_config s5m8767_regmap_config = {
 	.cache_type = REGCACHE_FLAT,
 };
 
+static void sec_pmic_dump_rev(struct sec_pmic_dev *sec_pmic)
+{
+	unsigned int val;
+
+	/* For each device type, the REG_ID is always the first register */
+	if (!regmap_read(sec_pmic->regmap_pmic, S2MPS11_REG_ID, &val))
+		dev_dbg(sec_pmic->dev, "Revision: 0x%x\n", val);
+}
+
 #ifdef CONFIG_OF
 /*
  * Only the common platform data elements for s5m8767 are parsed here from the
@@ -425,6 +434,7 @@ static int sec_pmic_probe(struct i2c_client *i2c,
 		goto err_mfd;
 
 	device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup);
+	sec_pmic_dump_rev(sec_pmic);
 
 	return ret;
 
-- 
1.9.1

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