board: st: stpmic1: add function stpmic1_init

Add a function stmpic_init to early initialize the PMIC STPMIC1
- keep vdd on during the reset cycle (to avoid issue when backup battery
  is absent)
- Check if debug is enabled to program PMIC according to the bit

This patch allows to remove the compilation of spl.c file from stm32mp1
board in dh_stm32mp1.

CONFIG_SPL_BOARD_INIT is removed as the new function is called earlier
in SPL, in the function board_early_init_f.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/board/st/common/stpmic1.c b/board/st/common/stpmic1.c
index 41111c5..85f9505 100644
--- a/board/st/common/stpmic1.c
+++ b/board/st/common/stpmic1.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <asm/io.h>
 #include <asm/arch/ddr.h>
 #include <linux/bitops.h>
 #include <linux/delay.h>
@@ -162,3 +163,33 @@ int board_ddr_power_init(enum ddr_type ddr_type)
 
 	return 0;
 }
+
+/* early init of PMIC */
+void stpmic1_init(void)
+{
+	struct udevice *dev;
+
+	if (uclass_get_device_by_driver(UCLASS_PMIC,
+					DM_GET_DRIVER(pmic_stpmic1), &dev))
+		return;
+
+	/* Keep vdd on during the reset cycle */
+	pmic_clrsetbits(dev,
+			STPMIC1_BUCKS_MRST_CR,
+			STPMIC1_MRST_BUCK(STPMIC1_BUCK3),
+			STPMIC1_MRST_BUCK(STPMIC1_BUCK3));
+
+	/* Check if debug is enabled to program PMIC according to the bit */
+	if (readl(TAMP_BOOT_CONTEXT) & TAMP_BOOT_DEBUG_ON) {
+		printf("Keep debug unit ON\n");
+
+		pmic_clrsetbits(dev, STPMIC1_BUCKS_MRST_CR,
+				STPMIC1_MRST_BUCK_DEBUG,
+				STPMIC1_MRST_BUCK_DEBUG);
+
+		if (STPMIC1_MRST_LDO_DEBUG)
+			pmic_clrsetbits(dev, STPMIC1_LDOS_MRST_CR,
+					STPMIC1_MRST_LDO_DEBUG,
+					STPMIC1_MRST_LDO_DEBUG);
+	}
+}