This adds support for powering off (the omap3 SoC) from the twl4030. This is
especially useful when the kernel does not actually power off the device using
this method but reboots and leaves it up to the bootloader to actually turn the
power off.
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Not every device has multiple MMC slots available, so it makes sense to enable
only the required LDOs for the available slots. Generic code in omap_hsmmc will
enable both VMMC1 and VMMC2, in doubt.
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Reviewed-by: Tom Rini <trini@ti.com>
This enables the VMMC2 LDO, which powers the MMC2 device.
When the device starts from MMC2, this has already been enabled by the BootROM,
but when starting from peripheral boot (USB, UART), it is not the case.
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
u-boot standard i2c read prototype is
i2c_read(addr, reg, 1, &buf, 1)
twl4030_i2c_read_u8(u8 addr, u8 *val, u8 reg)
does not provide consistency, so switch the prototype to be
consistent with rest of u-boot i2c operations:
twl4030_i2c_read_u8(u8 addr, u8 reg, u8 *val)
Signed-off-by: Nishanth Menon <nm@ti.com>
u-boot standard i2c register write prototype is
i2c_reg_write(u8 addr, u8 reg, u8 val)
twl4030_i2c_write_u8(u8 addr, u8 val, u8 reg)
does not provide consistency, so switch the prototype to be
consistent with rest of u-boot i2c operations:
twl4030_i2c_write_u8(u8 addr, u8 reg, u8 val)
Signed-off-by: Nishanth Menon <nm@ti.com>
twl4030_pmrecv_vsel_cfg currently first sets up device group (effectively
enabling the supply), and only then sets vsel (selects voltage). This could
lead to wrong voltage for a short time, or even long time if second i2c
write fails.
Fix this by writing vsel first and device group after that. Also
introduce error checking to not enable the supply if we failed to set
the voltage, and start logging errors as power supply problems are
usually important.
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
MMC interfaces are specified to be 3.3V compatible with an operating
voltage range of 3.1V to 3.5V for SD cards. This change affects
hardware using TWL4030 (TPS6595x) PMICs and should improve the
reliability when communicating with marginally-spec'd MMC devices.
3.15V is the highest possible level for this chip. This patch
has been tested on a Gumstix Overo board.
Signed-off-by: Ash Charles <ash@gumstix.com>
Tested-by: Steve Sakoman <steve@sakoman.com>
This patch adds a function to allow one to easily set the target
voltage for the TWL4030 regulators. It also modifies the existing
code to use this new function. Applicable definitions are moved
out of the driver file and into the header file so that they are
generally accessible
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Because twl4030 now has its own device files, move and rename
twl4030_mmc_config.
twl4030_mmc_config initializes the twl4030 power setting to
the mmc device. Because it is in the twl4030 power domain, move
it out of drivers/mmc/omap3_mmc.c and into drivers/power/twl4030.c.
The function was renamed to twl4030_power_mmc_init because all
the functions in this file are to have the format
twl4030_power_<device>_<action>
In this case the suffix is mmc_init so
device : mmc
action : init
Signed-off-by: Tom Rix <Tom.Rix@windriver.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Heiko Schocher <hs@denx.de>
Because twl4030 now has its own device files, move exiting
omap3 power_init_r to a new location.
power_init_r is the only function in board/omap3/common.
It initializes the twl4030 power for the board and enables
the led.
The power part of the the function is moved to twl4030_power_init in
drivers/power/twl4030.c The power compilation is conditional on the
existing config variable CONFIG_TWL4030_POWER.
The led part is moved to twl4030_led_init in the new file
drivers/misc/twl4030_led.c The led compilation is conditional on
the new config variable CONFIG_TWL4030_LED
The directory board/omap3/common was removed because power_init_r
was the only function in it.
Signed-off-by: Tom Rix <Tom.Rix@windriver.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Heiko Schocher <hs@denx.de>
The Zoom2 power reset button is on the top right side of the
main board. Press and hold for about to 8 seconds to completely
reset the board.
Some of the beta boards have a hardware problem that prevents
using this feature. If is difficult to further characterize the
boards that fail. So disable resetting for all beta boards.
The Zoom1 reset button is the red circle on the top right,
front of the board. Press and hold the button for 8 seconds to
completely reset the board.
After analyzing beagle, it was determined that other boards
that use the twl4030 for power managment can also make use
this function.
The resetting is done by the power management part of the twl4030.
Since there is no existing drivers/power, add one.
The compilation of power/twl4030.h is controlled by the config
variable CONFIG_TWL4030_POWER
Signed-off-by: Tom Rix <Tom.Rix@windriver.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Heiko Schocher <hs@denx.de>
Paul Kocialkowski
Wolfgang Denk
Nishanth Menon
Peter Meerwald
Grazvydas Ignotas
Ash Charles
Steve Sakoman
Tom Rix