u-boot/drivers/power/axp209.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

197 lines
3.9 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2012
* Henrik Nordstrom <henrik@henriknordstrom.net>
*/
#include <common.h>
#include <command.h>
#include <asm/arch/pmic_bus.h>
#include <axp_pmic.h>
static u8 axp209_mvolt_to_cfg(int mvolt, int min, int max, int div)
{
if (mvolt < min)
mvolt = min;
else if (mvolt > max)
mvolt = max;
return (mvolt - min) / div;
}
int axp_set_dcdc2(unsigned int mvolt)
{
int rc;
u8 cfg, current;
if (mvolt == 0)
return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
AXP209_OUTPUT_CTRL_DCDC2);
rc = pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_DCDC2);
if (rc)
return rc;
cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25);
/* Do we really need to be this gentle? It has built-in voltage slope */
while ((rc = pmic_bus_read(AXP209_DCDC2_VOLTAGE, &current)) == 0 &&
current != cfg) {
if (current < cfg)
current++;
else
current--;
rc = pmic_bus_write(AXP209_DCDC2_VOLTAGE, current);
if (rc)
break;
}
return rc;
}
int axp_set_dcdc3(unsigned int mvolt)
{
u8 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
int rc;
if (mvolt == 0)
return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
AXP209_OUTPUT_CTRL_DCDC3);
rc = pmic_bus_write(AXP209_DCDC3_VOLTAGE, cfg);
if (rc)
return rc;
return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_DCDC3);
}
int axp_set_aldo2(unsigned int mvolt)
{
int rc;
u8 cfg, reg;
if (mvolt == 0)
return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
AXP209_OUTPUT_CTRL_LDO2);
cfg = axp209_mvolt_to_cfg(mvolt, 1800, 3300, 100);
rc = pmic_bus_read(AXP209_LDO24_VOLTAGE, &reg);
if (rc)
return rc;
/* LDO2 configuration is in upper 4 bits */
reg = (reg & 0x0f) | (cfg << 4);
rc = pmic_bus_write(AXP209_LDO24_VOLTAGE, reg);
if (rc)
return rc;
return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO2);
}
int axp_set_aldo3(unsigned int mvolt)
{
u8 cfg;
int rc;
if (mvolt == 0)
return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
AXP209_OUTPUT_CTRL_LDO3);
if (mvolt == -1)
cfg = 0x80; /* determined by LDO3IN pin */
else
cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
rc = pmic_bus_write(AXP209_LDO3_VOLTAGE, cfg);
if (rc)
return rc;
return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO3);
}
int axp_set_aldo4(unsigned int mvolt)
{
int rc;
static const unsigned int vindex[] = {
1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500,
2700, 2800, 3000, 3100, 3200, 3300
};
u8 cfg, reg;
if (mvolt == 0)
return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
AXP209_OUTPUT_CTRL_LDO4);
/* Translate mvolt to register cfg value, requested <= selected */
for (cfg = 15; vindex[cfg] > mvolt && cfg > 0; cfg--);
rc = pmic_bus_read(AXP209_LDO24_VOLTAGE, &reg);
if (rc)
return rc;
/* LDO4 configuration is in lower 4 bits */
reg = (reg & 0xf0) | (cfg << 0);
rc = pmic_bus_write(AXP209_LDO24_VOLTAGE, reg);
if (rc)
return rc;
return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO4);
}
int axp_init(void)
{
u8 ver;
int i, rc;
rc = pmic_bus_init();
if (rc)
return rc;
rc = pmic_bus_read(AXP209_CHIP_VERSION, &ver);
if (rc)
return rc;
/* Low 4 bits is chip version */
ver &= 0x0f;
if (ver != 0x1)
return -EINVAL;
/* Mask all interrupts */
for (i = AXP209_IRQ_ENABLE1; i <= AXP209_IRQ_ENABLE5; i++) {
rc = pmic_bus_write(i, 0);
if (rc)
return rc;
}
/*
* Turn off LDOIO regulators / tri-state GPIO pins, when rebooting
* from android these are sometimes on.
*/
rc = pmic_bus_write(AXP_GPIO0_CTRL, AXP_GPIO_CTRL_INPUT);
if (rc)
return rc;
rc = pmic_bus_write(AXP_GPIO1_CTRL, AXP_GPIO_CTRL_INPUT);
if (rc)
return rc;
rc = pmic_bus_write(AXP_GPIO2_CTRL, AXP_GPIO_CTRL_INPUT);
if (rc)
return rc;
return 0;
}
int do_poweroff(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
pmic_bus_write(AXP209_SHUTDOWN, AXP209_POWEROFF);
/* infinite loop during shutdown */
while (1) {}
/* not reached */
return 0;
}