mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-10 13:16:16 +09:00
83d290c56f
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>
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 <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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