mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-13 23:02:59 +00:00
505cf4750a
'-1' is absolutely meaningless value. This patch changed from meaningless value to error number. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Reviewed-by: Simon Glass <sjg@chromium.org>
198 lines
3.9 KiB
C
198 lines
3.9 KiB
C
/*
|
|
* (C) Copyright 2012
|
|
* Henrik Nordstrom <henrik@henriknordstrom.net>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#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, ¤t)) == 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, ®);
|
|
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, ®);
|
|
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;
|
|
}
|