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ARM: rmobile: Implement PMIC reset on V2H Blanche

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Add code to reset the board through PMIC, by writing the required
PMIC registers in the CPU reset handler.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
This commit is contained in:
Marek Vasut 2020-03-21 16:57:58 +01:00 committed by marex
parent 9cf09c799a
commit 4666521d19
1 changed files with 20 additions and 0 deletions
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20
board/renesas/blanche/blanche.c
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@ -20,6 +20,7 @@
#include <dm.h>
#include <dm/platform_data/serial_sh.h>
#include <env.h>
#include <hang.h>
#include <i2c.h>
#include <linux/errno.h>
#include <malloc.h>
@ -355,4 +356,23 @@ int dram_init_banksize(void)
void reset_cpu(ulong addr)
{
struct udevice *dev;
const u8 pmic_bus = 6;
const u8 pmic_addr = 0x58;
u8 data;
int ret;
ret = i2c_get_chip_for_busnum(pmic_bus, pmic_addr, 1, &dev);
if (ret)
hang();
ret = dm_i2c_read(dev, 0x13, &data, 1);
if (ret)
hang();
data |= BIT(1);
ret = dm_i2c_write(dev, 0x13, &data, 1);
if (ret)
hang();
}