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Diffstat (limited to 'board/asus/transformer-t20/transformer-t20.c')
| -rw-r--r-- | board/asus/transformer-t20/transformer-t20.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/board/asus/transformer-t20/transformer-t20.c b/board/asus/transformer-t20/transformer-t20.c new file mode 100644 index 00000000000..42fc563a0bf --- /dev/null +++ b/board/asus/transformer-t20/transformer-t20.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2010,2011 + * NVIDIA Corporation <www.nvidia.com> + * + * (C) Copyright 2021 + * Svyatoslav Ryhel <clamor95@gmail.com> + */ + +/* T20 Transformers derive from Ventana board */ + +#include <dm.h> +#include <i2c.h> +#include <log.h> +#include <linux/delay.h> + +#define TPS6586X_I2C_ADDRESS 0x34 +#define TPS6586X_SUPPLYENE 0x14 +#define EXITSLREQ_BIT BIT(1) +#define SLEEP_MODE_BIT BIT(3) + +#ifdef CONFIG_CMD_POWEROFF +int do_poweroff(struct cmd_tbl *cmdtp, + int flag, int argc, char *const argv[]) +{ + struct udevice *dev; + uchar data_buffer[1]; + int ret; + + ret = i2c_get_chip_for_busnum(0, TPS6586X_I2C_ADDRESS, 1, &dev); + if (ret) { + log_debug("cannot find PMIC I2C chip\n"); + return 0; + } + + ret = dm_i2c_read(dev, TPS6586X_SUPPLYENE, data_buffer, 1); + if (ret) + return ret; + + data_buffer[0] &= ~EXITSLREQ_BIT; + + ret = dm_i2c_write(dev, TPS6586X_SUPPLYENE, data_buffer, 1); + if (ret) + return ret; + + data_buffer[0] |= SLEEP_MODE_BIT; + + ret = dm_i2c_write(dev, TPS6586X_SUPPLYENE, data_buffer, 1); + if (ret) + return ret; + + // wait some time and then print error + mdelay(5000); + printf("Failed to power off!!!\n"); + return 1; +} +#endif |