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OMAP3+: VC: make I2C config programmable with PMIC-specific settings

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Remove hard-coded I2C configuration in favor of settings that can be
configured from PMIC-specific values.  Currently only high-speed mode
and the master-code value are supported, since they were the only
fields currently used, but extending this is now trivial.

Thanks to Nishanth Menon <nm@ti.com> for reporting/fixing a sparse
problem and making omap_vc_i2c_init() static, as well as finding and
fixing a problem with the shift/mask of mcode.

Signed-off-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
Kevin Hilman
2011-03-30 16:36:30 -07:00
parent ce8ebe0dfb
commit f5395480f5
6 changed files with 66 additions and 7 deletions
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8
arch/arm/mach-omap2/vc.h
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@@ -37,6 +37,9 @@ struct voltagedomain;
* @cmd_ret_shift: RET field shift in PRM_VC_CMD_VAL_* register
* @cmd_off_shift: OFF field shift in PRM_VC_CMD_VAL_* register
* @cfg_channel_reg: VC channel configuration register
* @i2c_cfg_reg: I2C configuration register offset
* @i2c_cfg_hsen_mask: high-speed mode bit field mask in I2C config register
* @i2c_mcode_mask: MCODE field mask for I2C config register
*
* XXX One of cmd_on_mask and cmd_on_shift are not needed
* XXX VALID should probably be a shift, not a mask
@@ -56,6 +59,9 @@ struct omap_vc_common {
u8 cmd_ret_shift;
u8 cmd_off_shift;
u8 cfg_channel_reg;
u8 i2c_cfg_reg;
u8 i2c_cfg_hsen_mask;
u8 i2c_mcode_mask;
};
/* omap_vc_channel.flags values */
@@ -68,6 +74,7 @@ struct omap_vc_common {
* @cmd_reg_addr: command configuration register address
* @setup_time: setup time (in sys_clk cycles) of regulator for this channel
* @cfg_channel: current value of VC channel configuration register
* @i2c_high_speed: whether or not to use I2C high-speed mode
*
* @common: pointer to VC common data for this platform
* @smps_sa_mask: i2c slave address bitmask in the PRM_VC_SMPS_SA register
@@ -84,6 +91,7 @@ struct omap_vc_channel {
u16 cmd_reg_addr;
u16 setup_time;
u8 cfg_channel;
bool i2c_high_speed;
/* register access data */
const struct omap_vc_common *common;