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stpmic1: program pmic to keep only the debug unit on

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Depending on backup register value, we maintain the debug unit
powered-on for debugging purpose.
Only BUCK1 is required for powering the debug unit, so revert
the setting for all the other power lanes, except BUCK3 that
has to be always on.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
This commit is contained in:
Patrick Delaunay 2019-07-30 19:16:20 +02:00 committed by Patrice Chotard
parent 17ac2150c3
commit 178a415534
3 changed files with 18 additions and 2 deletions
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1
arch/arm/mach-stm32mp/include/mach/stm32.h
View File

@ -94,6 +94,7 @@ enum boot_device {
#define TAMP_BOOT_DEVICE_MASK GENMASK(7, 4)
#define TAMP_BOOT_INSTANCE_MASK GENMASK(3, 0)
#define TAMP_BOOT_FORCED_MASK GENMASK(7, 0)
#define TAMP_BOOT_DEBUG_ON BIT(16)
enum forced_boot_mode {
BOOT_NORMAL = 0x00,

14
board/st/stm32mp1/spl.c
View File

@ -27,5 +27,19 @@ void spl_board_init(void)
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) && !ret) {
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);
}
#endif
}

5
include/power/stpmic1.h
View File

@ -22,11 +22,12 @@
/* BUCKS_MRST_CR */
#define STPMIC1_MRST_BUCK(buck) BIT(buck)
#define STPMIC1_MRST_BUCK_ALL GENMASK(3, 0)
#define STPMIC1_MRST_BUCK_DEBUG (STPMIC1_MRST_BUCK(STPMIC1_BUCK1) | \
STPMIC1_MRST_BUCK(STPMIC1_BUCK3))
/* LDOS_MRST_CR */
#define STPMIC1_MRST_LDO(ldo) BIT(ldo)
#define STPMIC1_MRST_LDO_ALL GENMASK(6, 0)
#define STPMIC1_MRST_LDO_DEBUG 0
/* BUCKx_MAIN_CR (x=1...4) */
#define STPMIC1_BUCK_ENA BIT(0)