colibri_imx7: use Ricoh RN5T567 to reboot the board

Use the external PMIC Ricoh RN5T567 to reliably restart the system.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>

diff --git a/board/toradex/colibri_imx7/colibri_imx7.c b/board/toradex/colibri_imx7/colibri_imx7.c
index bd7d5bc858485552ef94022e667478b9a5256aa6..c64e31eaa4f58e5e5033c1d04c78d0309f2ff5ee 100644 (file)
--- a/board/toradex/colibri_imx7/colibri_imx7.c
+++ b/board/toradex/colibri_imx7/colibri_imx7.c
@@ -21,6 +21,8 @@
 #include <mmc.h>
 #include <miiphy.h>
 #include <netdev.h>
+#include <power/pmic.h>
+#include <power/rn5t567_pmic.h>
 #include <usb/ehci-ci.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -337,6 +339,46 @@ int board_late_init(void)
        return 0;
 }
 
+#ifdef CONFIG_DM_PMIC
+int power_init_board(void)
+{
+       struct udevice *dev;
+       int reg, ver;
+       int ret;
+
+
+       ret = pmic_get("rn5t567", &dev);
+       if (ret)
+               return ret;
+       ver = pmic_reg_read(dev, RN5T567_LSIVER);
+       reg = pmic_reg_read(dev, RN5T567_OTPVER);
+
+       printf("PMIC:  RN5T567 LSIVER=0x%02x OTPVER=0x%02x\n", ver, reg);
+
+       /* set judge and press timer of N_OE to minimal values */
+       pmic_clrsetbits(dev, RN5T567_NOETIMSETCNT, 0x7, 0);
+
+       return 0;
+}
+
+void reset_cpu(ulong addr)
+{
+       struct udevice *dev;
+
+       pmic_get("rn5t567", &dev);
+
+       /* Use PMIC to reset, set REPWRTIM to 0 and REPWRON to 1 */
+       pmic_reg_write(dev, RN5T567_REPCNT, 0x1);
+       pmic_reg_write(dev, RN5T567_SLPCNT, 0x1);
+
+       /*
+        * Re-power factor detection on PMIC side is not instant. 1ms
+        * proved to be enough time until reset takes effect.
+        */
+       mdelay(1);
+}
+#endif
+
 int checkboard(void)
 {
        printf("Model: Toradex Colibri iMX7%c\n",