mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
synced 2025-04-18 02:24:18 +00:00
df301601c8
For Allwinner boards we now use some heuritistics to find a preloaded .dtb file. Pass this address on to the PMIC setup routine, so that it can use the information contained therein to setup some initial power rails. Signed-off-by: Andre Przywara <andre.przywara@arm.com>
112 lines
2.1 KiB
C
112 lines
2.1 KiB
C
/*
|
|
* Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
|
|
* Copyright (c) 2018, Icenowy Zheng <icenowy@aosc.io>
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <arch_helpers.h>
|
|
#include <debug.h>
|
|
#include <delay_timer.h>
|
|
#include <errno.h>
|
|
#include <mmio.h>
|
|
#include <mentor/mi2cv.h>
|
|
#include <string.h>
|
|
#include <sunxi_def.h>
|
|
#include <sunxi_mmap.h>
|
|
#include <sunxi_private.h>
|
|
|
|
#define AXP805_ADDR 0x36
|
|
#define AXP805_ID 0x03
|
|
|
|
enum pmic_type {
|
|
NO_PMIC,
|
|
AXP805,
|
|
};
|
|
|
|
enum pmic_type pmic;
|
|
|
|
int axp_i2c_read(uint8_t chip, uint8_t reg, uint8_t *val)
|
|
{
|
|
int ret;
|
|
|
|
ret = i2c_write(chip, 0, 0, ®, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return i2c_read(chip, 0, 0, val, 1);
|
|
}
|
|
|
|
int axp_i2c_write(uint8_t chip, uint8_t reg, uint8_t val)
|
|
{
|
|
return i2c_write(chip, reg, 1, &val, 1);
|
|
}
|
|
|
|
static int axp805_probe(void)
|
|
{
|
|
int ret;
|
|
uint8_t val;
|
|
|
|
ret = axp_i2c_write(AXP805_ADDR, 0xff, 0x0);
|
|
if (ret) {
|
|
ERROR("PMIC: Cannot put AXP805 to master mode.\n");
|
|
return -EPERM;
|
|
}
|
|
|
|
ret = axp_i2c_read(AXP805_ADDR, AXP805_ID, &val);
|
|
|
|
if (!ret && ((val & 0xcf) == 0x40))
|
|
NOTICE("PMIC: AXP805 detected\n");
|
|
else if (ret) {
|
|
ERROR("PMIC: Cannot communicate with AXP805.\n");
|
|
return -EPERM;
|
|
} else {
|
|
ERROR("PMIC: Non-AXP805 chip attached at AXP805's address.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int sunxi_pmic_setup(uint16_t socid, const void *fdt)
|
|
{
|
|
int ret;
|
|
|
|
sunxi_init_platform_r_twi(SUNXI_SOC_H6, false);
|
|
/* initialise mi2cv driver */
|
|
i2c_init((void *)SUNXI_R_I2C_BASE);
|
|
|
|
NOTICE("PMIC: Probing AXP805\n");
|
|
pmic = AXP805;
|
|
|
|
ret = axp805_probe();
|
|
if (ret)
|
|
pmic = NO_PMIC;
|
|
else
|
|
pmic = AXP805;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __dead2 sunxi_power_down(void)
|
|
{
|
|
uint8_t val;
|
|
|
|
switch (pmic) {
|
|
case AXP805:
|
|
/* Re-initialise after rich OS might have used it. */
|
|
sunxi_init_platform_r_twi(SUNXI_SOC_H6, false);
|
|
/* initialise mi2cv driver */
|
|
i2c_init((void *)SUNXI_R_I2C_BASE);
|
|
axp_i2c_read(AXP805_ADDR, 0x32, &val);
|
|
axp_i2c_write(AXP805_ADDR, 0x32, val | 0x80);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
udelay(1000);
|
|
ERROR("PSCI: Cannot communicate with PMIC, halting\n");
|
|
wfi();
|
|
panic();
|
|
}
|