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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2016 Freescale Semiconductor, Inc.
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* Hou Zhiqiang <Zhiqiang.Hou@freescale.com>
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*/
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#include <common.h>
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#include <errno.h>
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#include <i2c.h>
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#include <log.h>
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#include <power/pmic.h>
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#include <power/mc34vr500_pmic.h>
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static uint8_t swxvolt_addr[4] = { MC34VR500_SW1VOLT,
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MC34VR500_SW2VOLT,
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MC34VR500_SW3VOLT,
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MC34VR500_SW4VOLT };
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static uint8_t swx_set_point_base[4] = { 13, 9, 9, 9 };
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int mc34vr500_get_sw_volt(uint8_t sw)
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{
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struct pmic *p;
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u32 swxvolt;
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uint8_t spb;
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int sw_volt;
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int ret;
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debug("%s: Get SW%u volt from swxvolt_addr = 0x%x\n",
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__func__, sw + 1, swxvolt_addr[sw]);
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if (sw > SW4) {
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printf("%s: Unsupported SW(sw%d)\n", __func__, sw + 1);
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return -EINVAL;
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}
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p = pmic_get("MC34VR500");
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if (!p) {
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printf("%s: Did NOT find PMIC MC34VR500\n", __func__);
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return -ENODEV;
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}
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ret = pmic_probe(p);
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if (ret)
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return ret;
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ret = pmic_reg_read(p, swxvolt_addr[sw], &swxvolt);
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if (ret) {
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printf("%s: Failed to get SW%u volt\n", __func__, sw + 1);
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return ret;
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}
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debug("%s: SW%d step point swxvolt = %u\n", __func__, sw + 1, swxvolt);
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spb = swx_set_point_base[sw];
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/* The base of SW volt is 625mV and increase by step 25mV */
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sw_volt = 625 + (swxvolt - spb) * 25;
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debug("%s: SW%u volt = %dmV\n", __func__, sw + 1, sw_volt);
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return sw_volt;
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}
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int mc34vr500_set_sw_volt(uint8_t sw, int sw_volt)
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{
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struct pmic *p;
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u32 swxvolt;
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uint8_t spb;
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int ret;
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debug("%s: Set SW%u volt to %dmV\n", __func__, sw + 1, sw_volt);
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/* The least SW volt is 625mV, and only 4 SW outputs */
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if (sw > SW4 || sw_volt < 625)
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return -EINVAL;
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p = pmic_get("MC34VR500");
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if (!p) {
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printf("%s: Did NOT find PMIC MC34VR500\n", __func__);
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return -ENODEV;
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}
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ret = pmic_probe(p);
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if (ret)
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return ret;
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spb = swx_set_point_base[sw];
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/* The base of SW volt is 625mV and increase by step 25mV */
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swxvolt = (sw_volt - 625) / 25 + spb;
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debug("%s: SW%d step point swxvolt = %u\n", __func__, sw + 1, swxvolt);
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if (swxvolt > 63)
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return -EINVAL;
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ret = pmic_reg_write(p, swxvolt_addr[sw], swxvolt);
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if (ret)
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return ret;
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return 0;
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}
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