linux-kernel - RE: [PATCH 2/4] mfd: twl-core: switch over to defines in twl.h

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Date:	Wed, 18 Aug 2010 12:02:57 +0530
From:	"Gopinath, Thara" <thara@...com>
To:	"felipe.balbi@...ia.com" <felipe.balbi@...ia.com>,
	Samuel Ortiz <sameo@...ux.intel.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	Tony Lindgren <tony@...mide.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: RE: [PATCH 2/4] mfd: twl-core: switch over to defines in twl.h



>>-----Original Message-----
>>From: linux-omap-owner@...r.kernel.org [mailto:linux-omap-owner@...r.kernel.org] On Behalf Of
>>felipe.balbi@...ia.com
>>Sent: Wednesday, August 18, 2010 11:50 AM
>>To: Samuel Ortiz
>>Cc: linux-kernel@...r.kernel.org; linux-omap@...r.kernel.org; Tony Lindgren; Andrew Morton; Felipe
>>Balbi
>>Subject: [PATCH 2/4] mfd: twl-core: switch over to defines in twl.h
>>
>>From: Felipe Balbi <felipe.balbi@...ia.com>
>>
>>use the new definitions on twl header for code
>>consistency.
>>
>>Signed-off-by: Felipe Balbi <felipe.balbi@...ia.com>
>>---
>> drivers/mfd/twl-core.c |   21 +++++++++------------
>> 1 files changed, 9 insertions(+), 12 deletions(-)
>>
>>diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
>>index 720e099..9689ecf 100644
>>--- a/drivers/mfd/twl-core.c
>>+++ b/drivers/mfd/twl-core.c
>>@@ -202,12 +202,6 @@
>>
>> /* Few power values */
>> #define R_CFG_BOOT			0x05
>>-#define R_PROTECT_KEY			0x0E
>>-
>>-/* access control values for R_PROTECT_KEY */
>>-#define KEY_UNLOCK1			0xce
>>-#define KEY_UNLOCK2			0xec
>>-#define KEY_LOCK			0x00
>>
>> /* some fields in R_CFG_BOOT */
>> #define HFCLK_FREQ_19p2_MHZ		(1 << 0)
>>@@ -846,8 +840,8 @@ static inline int __init protect_pm_master(void)
>> {
>> 	int e = 0;
>>
>>-	e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_LOCK,
>>-			R_PROTECT_KEY);
>>+	e = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0,
>>+			TWL4030_PM_MASTER_PROTECT_KEY);

Hello Felipe,

R_PROTECT_KEY offset is 0xE where as the new TWL4030_PM_MASTER_PROTECT_KEY
is defined as 0xd. I have not checked the trm to see which is correct. But
I hope this is a conscious change. Else we will end up breaking the functionality.
Also if this is a conscious change may be you should mention it in the patch
description. This comment applies to all other places where R_PROTECT_KEY has
been replaced with TWL4030_PM_MASTER_PROTECT_KEY in this patch as well as in
patch 3/4 and patch 4/4.

Regards
Thara

>> 	return e;
>> }
>>
>>@@ -855,10 +849,13 @@ static inline int __init unprotect_pm_master(void)
>> {
>> 	int e = 0;
>>
>>-	e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_UNLOCK1,
>>-			R_PROTECT_KEY);
>>-	e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_UNLOCK2,
>>-			R_PROTECT_KEY);
>>+	e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
>>+			TWL4030_PM_MASTER_KEY_CFG1,
>>+			TWL4030_PM_MASTER_PROTECT_KEY);
>>+	e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
>>+			TWL4030_PM_MASTER_KEY_CFG2,
>>+			TWL4030_PM_MASTER_PROTECT_KEY);
>>+
>> 	return e;
>> }
>>
>>--
>>1.7.2.1.6.g61bf12
>>
>>--
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