[PATCH] board: freescale: t208xrdb: enable Power-On Reset for rev D boards

[Camelia Groza]

From: Camelia Groza <camelia.groza at nxp.com>

Starting with board revision D, the MISCCSR CPLD register needs to be
configured to enable Power-on Reset for software reset commands.

Signed-off-by: Camelia Groza <camelia.groza at nxp.com>
---
 board/freescale/t208xrdb/cpld.h     | 4 ++++
 board/freescale/t208xrdb/t208xrdb.c | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/board/freescale/t208xrdb/cpld.h b/board/freescale/t208xrdb/cpld.h
index a623b1811faf..3139c2b85fd1 100644
--- a/board/freescale/t208xrdb/cpld.h
+++ b/board/freescale/t208xrdb/cpld.h
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright 2014 Freescale Semiconductor
+ * Copyright 2021 NXP
  */
 
 /*
@@ -42,3 +43,6 @@ void cpld_write(unsigned int reg, u8 value);
 
 /* RSTCON Register */
 #define CPLD_RSTCON_EDC_RST	0x04
+
+/* MISCCSR Register */
+#define CPLD_MISC_POR_EN	0x30
diff --git a/board/freescale/t208xrdb/t208xrdb.c b/board/freescale/t208xrdb/t208xrdb.c
index 1f0cdee0b863..947dd6aa9f3a 100644
--- a/board/freescale/t208xrdb/t208xrdb.c
+++ b/board/freescale/t208xrdb/t208xrdb.c
@@ -128,6 +128,13 @@ int misc_init_r(void)
 	reg |= CPLD_RSTCON_EDC_RST;
 	CPLD_WRITE(reset_ctl, reg);
 
+	/* Enable POR for boards revisions D and up */
+	if (get_hw_revision() >= 'D') {
+		reg = CPLD_READ(misc_csr);
+		reg |= CPLD_MISC_POR_EN;
+		CPLD_WRITE(misc_csr, reg);
+	}
+
 	return 0;
 }
 
-- 
2.17.1