mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-17 18:28:55 +00:00
95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright 2016 Freescale Semiconductor, Inc.
|
|
* Hou Zhiqiang <Zhiqiang.Hou@freescale.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <errno.h>
|
|
#include <i2c.h>
|
|
#include <log.h>
|
|
#include <power/pmic.h>
|
|
#include <power/mc34vr500_pmic.h>
|
|
|
|
static uint8_t swxvolt_addr[4] = { MC34VR500_SW1VOLT,
|
|
MC34VR500_SW2VOLT,
|
|
MC34VR500_SW3VOLT,
|
|
MC34VR500_SW4VOLT };
|
|
|
|
static uint8_t swx_set_point_base[4] = { 13, 9, 9, 9 };
|
|
|
|
int mc34vr500_get_sw_volt(uint8_t sw)
|
|
{
|
|
struct pmic *p;
|
|
u32 swxvolt;
|
|
uint8_t spb;
|
|
int sw_volt;
|
|
int ret;
|
|
|
|
debug("%s: Get SW%u volt from swxvolt_addr = 0x%x\n",
|
|
__func__, sw + 1, swxvolt_addr[sw]);
|
|
if (sw > SW4) {
|
|
printf("%s: Unsupported SW(sw%d)\n", __func__, sw + 1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
p = pmic_get("MC34VR500");
|
|
if (!p) {
|
|
printf("%s: Did NOT find PMIC MC34VR500\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = pmic_probe(p);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = pmic_reg_read(p, swxvolt_addr[sw], &swxvolt);
|
|
if (ret) {
|
|
printf("%s: Failed to get SW%u volt\n", __func__, sw + 1);
|
|
return ret;
|
|
}
|
|
|
|
debug("%s: SW%d step point swxvolt = %u\n", __func__, sw + 1, swxvolt);
|
|
spb = swx_set_point_base[sw];
|
|
/* The base of SW volt is 625mV and increase by step 25mV */
|
|
sw_volt = 625 + (swxvolt - spb) * 25;
|
|
|
|
debug("%s: SW%u volt = %dmV\n", __func__, sw + 1, sw_volt);
|
|
return sw_volt;
|
|
}
|
|
|
|
int mc34vr500_set_sw_volt(uint8_t sw, int sw_volt)
|
|
{
|
|
struct pmic *p;
|
|
u32 swxvolt;
|
|
uint8_t spb;
|
|
int ret;
|
|
|
|
debug("%s: Set SW%u volt to %dmV\n", __func__, sw + 1, sw_volt);
|
|
/* The least SW volt is 625mV, and only 4 SW outputs */
|
|
if (sw > SW4 || sw_volt < 625)
|
|
return -EINVAL;
|
|
|
|
p = pmic_get("MC34VR500");
|
|
if (!p) {
|
|
printf("%s: Did NOT find PMIC MC34VR500\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = pmic_probe(p);
|
|
if (ret)
|
|
return ret;
|
|
|
|
spb = swx_set_point_base[sw];
|
|
/* The base of SW volt is 625mV and increase by step 25mV */
|
|
swxvolt = (sw_volt - 625) / 25 + spb;
|
|
debug("%s: SW%d step point swxvolt = %u\n", __func__, sw + 1, swxvolt);
|
|
if (swxvolt > 63)
|
|
return -EINVAL;
|
|
|
|
ret = pmic_reg_write(p, swxvolt_addr[sw], swxvolt);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|