VC channel configuration is programmed based on settings coming from
the PMIC configuration.
Currently, the VC channel to PMIC mapping is a simple one-to-one
mapping. Whenever a VC channel parameter is configured (i2c slave
addres, PMIC register address, on/ret/off command), the corresponding
bits are enabled in the VC channel configuration register.
If necessary, the programmability of channel configuration settings
could be extended to board/PMIC files, however, because this patch
changes the channel configuration to be programmed based on existing
values from the PMIC settings, it may not be required.
Also note that starting with OMAP4, where there are more than 2
channels, one channel is identified as the "default" channel. When
any of the bits in the channel config for the other channels are zero,
it means to use the default channel. The OMAP4 TRM (at least through
NDA version Q) is wrong in describing which is the default channel.
The default channel on OMAP4 is MPU, not CORE as decribed in the TRM.
Signed-off-by: Kevin Hilman <khilman@ti.com>
Configuring the on/onlp/ret/off command values is common to OMAP3 & 4.
Move from OMAP3-only init into common VC init.
Signed-off-by: Kevin Hilman <khilman@ti.com>
- add setup_time field to struct omap_vc_channel (init'd from PMIC data)
- use VC/VP register access helper for read/modify/write
- move VFSM structure from omap_vdd_info into struct voltagedomain
- remove redunant _data suffix from VFSM structures and variables
- remove voltsetup_shift, use ffs() on the mask value to find the shift
Signed-off-by: Kevin Hilman <khilman@ti.com>
The PMIC configurable variables should be isolated to VC initialization.
The rest of the VC functions (like VC bypass) should use the i2c slave address
and voltage register address fields from struct omap_vc_channel.
Signed-off-by: Kevin Hilman <khilman@ti.com>
- support both voltage register address and command register address
for each VC channel
- add fields for voltage register address (volra) and command register
address (cmdra) to struct omap_vc_channel
- use VC/VP register access read/modify/write helper
- remove volra_shift field (use __ffs(mask) for shift value)
- I2C addresses 10-bit, change size to u16
Signed-off-by: Kevin Hilman <khilman@ti.com>
- 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>
Convert VC/VP register access to use PRM VC/VP accessor functions. In
the process, move the read/write function pointers from vdd_info into
struct voltagedomain.
No functional changes.
Additional cleanup:
- remove prm_mod field from VC/VP data structures, the PRM register
access functions know which PRM module to use.
Signed-off-by: Kevin Hilman <khilman@ti.com>
The VC layer can support PMICs with separate voltage and command
registers by putting the different registers in the PRM_VC_SMPS_VOL_RA
and PRCM_VC_SMPS_CMD_RA registers respectively.
The PMIC data must supply at least a voltage register address
(volt_reg_addr). The command register address (cmd_reg_addr) is
optional. If the PMIC data does not supply a separate command
register address, the VC will use the voltage register address for both.
Signed-off-by: Kevin Hilman <khilman@ti.com>
Move the VC instance struct from omap_vdd_info into struct voltagedomain.
While moving, perform some misc. renames for readability.
No functional changes.
Summary of renames:
- rename omap_vc_instance to omap_vc_channel, since there is only
one instance of the VC IP and this actually represents channels
using TRM terminology.
- rename 'vc_common' field of VC channel which led to:
s/vc->vc_common/vc->common/
- remove redundant '_data' suffix
- OMAP3: vc1 --> vc_mpu, vc2 --> vc_core
- omap_vc_bypass_scale_voltage() -> omap_vc_bypass_scale()
Signed-off-by: Kevin Hilman <khilman@ti.com>
merge
As part of the voltage layer cleanup, split out VC specific code into
a dedicated VC layer. This patch primarily just moves VC code from
voltage.c into vc.c, and adds prototypes to vc.h.
No functional changes.
For readability, each function was given a local 'vc' pointer:
struct omap_vc_instance_data *vc = voltdm->vdd->vc_data;
and a global replace of s/vdd->vc_data/vc/ was done.
Also vc_init was renamed to vc_init_channel to reflect that this is
per-VC channel initializtion.
Signed-off-by: Kevin Hilman <khilman@ti.com>
Kevin Hilman