From 32d322bcb0d6886084197247e30aa130956d5978 Mon Sep 17 00:00:00 2001
From: Wolfram Sang <w.sang@pengutronix.de>
Date: Fri, 23 Mar 2012 15:02:36 -0700
Subject: rtc: ds1307: refactor chip_desc table

The chip_desc table is suboptimal.  Currently it requires an entry for
every new chip type, even if it is empty.  This has already been
forgotten for the ds1388.  Refactor the code, so new entries are only
needed, when they chip type really needs a (non-empty) description.
Also make the table visually more appealing.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Austin Boyle <Austin.Boyle@aviatnet.com>
Cc: David Anders <danders.dev@gmail.com>
Cc: Alessandro Zummo <alessandro.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/rtc/rtc-ds1307.c | 48 +++++++++++++++++++-----------------------------
 1 file changed, 19 insertions(+), 29 deletions(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 58edcb076742..5098e1ad3a3e 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -36,6 +36,7 @@ enum ds_type {
 	m41t00,
 	mcp7941x,
 	rx_8025,
+	last_ds_type /* always last */
 	// rs5c372 too?  different address...
 };
 
@@ -120,30 +121,23 @@ struct chip_desc {
 	unsigned		alarm:1;
 };
 
-static const struct chip_desc chips[] = {
-[ds_1307] = {
-	.nvram56	= 1,
-},
-[ds_1337] = {
-	.alarm		= 1,
-},
-[ds_1338] = {
-	.nvram56	= 1,
-},
-[ds_1339] = {
-	.alarm		= 1,
-},
-[ds_1340] = {
-},
-[ds_3231] = {
-	.alarm		= 1,
-},
-[m41t00] = {
-},
-[mcp7941x] = {
-},
-[rx_8025] = {
-}, };
+static const struct chip_desc chips[last_ds_type] = {
+	[ds_1307] = {
+		.nvram56	= 1,
+	},
+	[ds_1337] = {
+		.alarm		= 1,
+	},
+	[ds_1338] = {
+		.nvram56	= 1,
+	},
+	[ds_1339] = {
+		.alarm		= 1,
+	},
+	[ds_3231] = {
+		.alarm		= 1,
+	},
+};
 
 static const struct i2c_device_id ds1307_id[] = {
 	{ "ds1307", ds_1307 },
@@ -836,11 +830,7 @@ read_rtc:
 		}
 
 		break;
-	case rx_8025:
-	case ds_1337:
-	case ds_1339:
-	case ds_1388:
-	case ds_3231:
+	default:
 		break;
 	}
 
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