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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>
122 lines
2.4 KiB
C
122 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2011-2013
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* Texas Instruments, <www.ti.com>
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*/
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#include <common.h>
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#include <i2c.h>
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#include <power/tps65910.h>
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struct udevice *tps65910_dev __section(".data") = NULL;
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static inline int tps65910_read_reg(int addr, uchar *buf)
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{
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#if !CONFIG_IS_ENABLED(DM_I2C)
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return i2c_read(TPS65910_CTRL_I2C_ADDR, addr, 1, buf, 1);
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#else
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int rc;
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rc = dm_i2c_reg_read(tps65910_dev, addr);
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if (rc < 0)
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return rc;
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*buf = (uchar)rc;
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return 0;
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#endif
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}
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static inline int tps65910_write_reg(int addr, uchar *buf)
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{
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#if !CONFIG_IS_ENABLED(DM_I2C)
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return i2c_write(TPS65910_CTRL_I2C_ADDR, addr, 1, buf, 1);
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#else
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return dm_i2c_reg_write(tps65910_dev, addr, *buf);
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#endif
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}
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int power_tps65910_init(unsigned char bus)
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{
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#if CONFIG_IS_ENABLED(DM_I2C)
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struct udevice *dev = NULL;
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int rc;
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rc = i2c_get_chip_for_busnum(bus, TPS65910_CTRL_I2C_ADDR, 1, &dev);
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if (rc)
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return rc;
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tps65910_dev = dev;
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#endif
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return 0;
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}
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/*
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* tps65910_set_i2c_control() - Set the TPS65910 to be controlled via the I2C
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* interface.
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* @return: 0 on success, not 0 on failure
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*/
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int tps65910_set_i2c_control(void)
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{
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int ret;
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uchar buf;
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/* VDD1/2 voltage selection register access by control i/f */
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ret = tps65910_read_reg(TPS65910_DEVCTRL_REG, &buf);
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if (ret)
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return ret;
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buf |= TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_CTL_I2C;
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return tps65910_write_reg(TPS65910_DEVCTRL_REG, &buf);
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}
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/*
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* tps65910_voltage_update() - Voltage switching for MPU frequency switching.
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* @module: mpu - 0, core - 1
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* @vddx_op_vol_sel: vdd voltage to set
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* @return: 0 on success, not 0 on failure
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*/
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int tps65910_voltage_update(unsigned int module, unsigned char vddx_op_vol_sel)
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{
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uchar buf;
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unsigned int reg_offset;
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int ret;
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if (module == MPU)
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reg_offset = TPS65910_VDD1_OP_REG;
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else
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reg_offset = TPS65910_VDD2_OP_REG;
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/* Select VDDx OP */
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ret = tps65910_read_reg(reg_offset, &buf);
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if (ret)
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return ret;
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buf &= ~TPS65910_OP_REG_CMD_MASK;
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ret = tps65910_write_reg(reg_offset, &buf);
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if (ret)
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return ret;
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/* Configure VDDx OP Voltage */
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ret = tps65910_read_reg(reg_offset, &buf);
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if (ret)
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return ret;
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buf &= ~TPS65910_OP_REG_SEL_MASK;
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buf |= vddx_op_vol_sel;
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ret = tps65910_write_reg(reg_offset, &buf);
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if (ret)
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return ret;
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ret = tps65910_read_reg(reg_offset, &buf);
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if (ret)
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return ret;
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if ((buf & TPS65910_OP_REG_SEL_MASK) != vddx_op_vol_sel)
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return 1;
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return 0;
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}
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