linux-kernel - [PATCH v4 1/8] extcon: arizona: Simplify pdata symantics for micd

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1434717456-31995-2-git-send-email-ckeepax@opensource.wolfsonmicro.com>
Date:	Fri, 19 Jun 2015 13:37:29 +0100
From:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
To:	lee.jones@...aro.org, cw00.choi@...sung.com
Cc:	myungjoo.ham@...sung.com, sameo@...ux.intel.com,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	patches@...nsource.wolfsonmicro.com
Subject: [PATCH v4 1/8] extcon: arizona: Simplify pdata symantics for micd_dbtime

Currently micd_dbtime can be set to 0 for default, 1 for 4 measurements,
or a greater than 16-bit value for 2 measurements. This patch simplifies
the symantics to 2 for 2 measurements, 4 for 4 measurements and any
other value for the default.

I am not super keen on changing the symantics of the pdata at this stage
in the drivers life, but acceptance of the DT binding for this field has
been made conditional on this happening.

Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
---
 drivers/extcon/extcon-arizona.c   |   14 +++++++++++---
 include/linux/mfd/arizona/pdata.h |    3 +++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index 9262b45..1fbe3b4 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -1267,11 +1267,19 @@ static int arizona_extcon_probe(struct platform_device *pdev)
 				   arizona->pdata.micd_rate
 				   << ARIZONA_MICD_RATE_SHIFT);
 
-	if (arizona->pdata.micd_dbtime)
+	switch (arizona->pdata.micd_dbtime) {
+	case ARIZONA_MICD_DBTIME_FOUR_READINGS:
 		regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
 				   ARIZONA_MICD_DBTIME_MASK,
-				   arizona->pdata.micd_dbtime
-				   << ARIZONA_MICD_DBTIME_SHIFT);
+				   ARIZONA_MICD_DBTIME);
+		break;
+	case ARIZONA_MICD_DBTIME_TWO_READINGS:
+		regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
+				   ARIZONA_MICD_DBTIME_MASK, 0);
+		break;
+	default:
+		break;
+	}
 
 	BUILD_BUG_ON(ARRAY_SIZE(arizona_micd_levels) != 0x40);
 
diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h
index aa5c48b..bd68355 100644
--- a/include/linux/mfd/arizona/pdata.h
+++ b/include/linux/mfd/arizona/pdata.h
@@ -53,6 +53,9 @@
 
 #define ARIZONA_MAX_PDM_SPK 2
 
+#define ARIZONA_MICD_DBTIME_TWO_READINGS 2
+#define ARIZONA_MICD_DBTIME_FOUR_READINGS 4
+
 struct regulator_init_data;
 
 struct arizona_micbias {
-- 
1.7.2.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
Please read the FAQ at  http://www.tux.org/lkml/