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OMAP3+: VC: cleanup i2c slave address configuration

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- Add an i2c_slave_address field to the omap_vc_channel
- use VC/VP read/modify/write helper instead of open-coding
- remove smps_sa_shift, use __ffs(mask) for shift value
- I2C addresses 10-bit, change size to u16

Special thanks to Shweta Gulati <shweta.gulati@ti.com> for suggesting
the use of __ffs(x) instead of ffs(x) - 1.

Signed-off-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
Kevin Hilman
2011-03-29 14:02:36 -07:00
parent 4bcc475ebd
commit ba112a4e86
5 changed files with 15 additions and 14 deletions
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9
arch/arm/mach-omap2/vc.h
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@ -56,21 +56,24 @@ struct omap_vc_common {
/**
* struct omap_vc_channel - VC per-instance data
* @i2c_slave_addr: I2C slave address of PMIC for this VC channel
* @common: pointer to VC common data for this platform
* @smps_sa_mask: SA* bitmask in the PRM_VC_SMPS_SA register
* @smps_sa_mask: i2c slave address bitmask in the PRM_VC_SMPS_SA register
* @smps_volra_mask: VOLRA* bitmask in the PRM_VC_VOL_RA register
* @smps_sa_shift: SA* field shift in the PRM_VC_SMPS_SA register
* @smps_volra_shift: VOLRA* field shift in the PRM_VC_VOL_RA register
*
* XXX It is not necessary to have both a *_mask and a *_shift -
* remove one
*/
struct omap_vc_channel {
/* channel state */
u16 i2c_slave_addr;
/* register access data */
const struct omap_vc_common *common;
u32 smps_sa_mask;
u32 smps_volra_mask;
u8 cmdval_reg;
u8 smps_sa_shift;
u8 smps_volra_shift;
};