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The Acer Iconia A500 is a tablet computer designed, developed and marketed by Acer Inc. It is powered by 1 GHz Nvidia Tegra 2 processor and 1GB DDR2 RAM. The A500 is sold with 64 GB, although both 16 GB and 32 GB models are available. Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2010,2011
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* NVIDIA Corporation <www.nvidia.com>
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*
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* (C) Copyright 2024
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* Svyatoslav Ryhel <clamor95@gmail.com>
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*/
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/* Picasso derives from Ventana board */
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#include <dm.h>
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#include <i2c.h>
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#include <log.h>
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#include <linux/delay.h>
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#define TPS6586X_I2C_ADDRESS 0x34
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#define TPS6586X_SUPPLYENE 0x14
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#define EXITSLREQ_BIT BIT(1)
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#define SLEEP_MODE_BIT BIT(3)
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#ifdef CONFIG_CMD_POWEROFF
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int do_poweroff(struct cmd_tbl *cmdtp,
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int flag, int argc, char *const argv[])
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{
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struct udevice *dev;
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uchar data_buffer[1];
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int ret;
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ret = i2c_get_chip_for_busnum(0, TPS6586X_I2C_ADDRESS, 1, &dev);
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if (ret) {
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log_debug("cannot find PMIC I2C chip\n");
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return 0;
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}
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ret = dm_i2c_read(dev, TPS6586X_SUPPLYENE, data_buffer, 1);
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if (ret)
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return ret;
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data_buffer[0] &= ~EXITSLREQ_BIT;
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ret = dm_i2c_write(dev, TPS6586X_SUPPLYENE, data_buffer, 1);
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if (ret)
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return ret;
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data_buffer[0] |= SLEEP_MODE_BIT;
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ret = dm_i2c_write(dev, TPS6586X_SUPPLYENE, data_buffer, 1);
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if (ret)
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return ret;
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// wait some time and then print error
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mdelay(5000);
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printf("Failed to power off!!!\n");
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return 1;
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}
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#endif
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