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Add support for reset command on VisionFive platform #36

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Add support for reset command on VisionFive platform #36

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45 changes: 45 additions & 0 deletions board/starfive/jh7100/jh7100.c
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@
#include <netdev.h>
#include <phy_interface.h>
#include <flash.h>
#include <i2c.h>

#include <asm/arch/io.h>
#include <asm/arch/global_reg.h>
Expand Down Expand Up @@ -1533,3 +1534,47 @@ int board_init(void)

return ret;
}

/*
* Platform reset via TPS65086 PMIC
*/

#define TPS65086_FORCESHUTDN 0x91
#define TPS65086_I2C_ADDR 0x5e
#define TPS65086_I2C_BUS 0

void reset_misc(void)
{
u_char one = 1;
struct udevice *dev;
struct udevice *bus;
struct dm_i2c_chip *i2c_chip;
int ret;

ret = uclass_get_device_by_seq(UCLASS_I2C, TPS65086_I2C_BUS, &bus);
if (ret) {
debug("%s: No bus %d\n", __func__, TPS65086_I2C_BUS);
return;
}

ret = i2c_get_chip(bus, TPS65086_I2C_ADDR, 1, &dev);
if (!ret)
ret = i2c_set_chip_offset_len(dev, 1);
if (ret) {
printf("Error writing the chip: %d", ret);
return;
}

i2c_chip = dev_get_parent_plat(dev);
if (!i2c_chip){
printf("Error writing the chip: %d", ret);
return;
}

i2c_chip->flags &= ~DM_I2C_CHIP_WR_ADDRESS;
ret = dm_i2c_write(dev, TPS65086_FORCESHUTDN, &one, 1);
if (ret) {
printf("Error writing the chip: %d", ret);
return;
}
}