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regulator: twl4030 regulators

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Support most of the LDO regulators in the twl4030 family chips.
In the case of LDOs supporting MMC/SD, the voltage controls are
used; but in most other cases, the regulator framework is only
used to enable/disable a supplies, conserving power when a given
voltage rail is not needed.

The drivers/mfd/twl4030-core.c code already sets up the various
regulators according to board-specific configuration, and knows
that some chips don't provide the full set of voltage rails.

The omitted regulators are intended to be under hardware control,
such as during the hardware-mediated system powerup, powerdown,
and suspend states.  Unless/until software hooks are known to
be safe, they won't be exported here.

These regulators implement the new get_status() operation, but
can't realistically implement get_mode(); the status output is
effectively the result of a vote, with the relevant hardware
inputs not exposed.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
David Brownell 2009-02-08 10:37:06 -08:00 • committed by Liam Girdwood
parent 3b2a6061af
commit fa16a5c13a
4 changed files with 566 additions and 0 deletions
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47
include/linux/i2c/twl4030.h
View file

@ -218,6 +218,53 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
/*----------------------------------------------------------------------*/
/* Power bus message definitions */
#define DEV_GRP_NULL 0x0
#define DEV_GRP_P1 0x1
#define DEV_GRP_P2 0x2
#define DEV_GRP_P3 0x4
#define RES_GRP_RES 0x0
#define RES_GRP_PP 0x1
#define RES_GRP_RC 0x2
#define RES_GRP_PP_RC 0x3
#define RES_GRP_PR 0x4
#define RES_GRP_PP_PR 0x5
#define RES_GRP_RC_PR 0x6
#define RES_GRP_ALL 0x7
#define RES_TYPE2_R0 0x0
#define RES_TYPE_ALL 0x7
#define RES_STATE_WRST 0xF
#define RES_STATE_ACTIVE 0xE
#define RES_STATE_SLEEP 0x8
#define RES_STATE_OFF 0x0
/*
* Power Bus Message Format ... these can be sent individually by Linux,
* but are usually part of downloaded scripts that are run when various
* power events are triggered.
*
* Broadcast Message (16 Bits):
* DEV_GRP[15:13] MT[12] RES_GRP[11:9] RES_TYPE2[8:7] RES_TYPE[6:4]
* RES_STATE[3:0]
*
* Singular Message (16 Bits):
* DEV_GRP[15:13] MT[12] RES_ID[11:4] RES_STATE[3:0]
*/
#define MSG_BROADCAST(devgrp, grp, type, type2, state) \
( (devgrp) << 13 | 1 << 12 | (grp) << 9 | (type2) << 7 \
| (type) << 4 | (state))
#define MSG_SINGULAR(devgrp, id, state) \
((devgrp) << 13 | 0 << 12 | (id) << 4 | (state))
/*----------------------------------------------------------------------*/
struct twl4030_bci_platform_data {
int *battery_tmp_tbl;
unsigned int tblsize;