From 2f238327b7273656eb7670804fdb16de097b39b9 Mon Sep 17 00:00:00 2001 From: Patrick Delaunay Date: Mon, 25 May 2020 12:19:47 +0200 Subject: [PATCH] board: stm32mp1: update vddcore in SPL For board using STPMIC1, the vddcore is provided by BUCK1 of STPMIC1 and need to be updated for 800MHz support and only after the clock tree initialization. The VDDCORE voltage value is provided by clock driver, saved in global variable opp_voltage_mv and udpated in SPL board_early_init_f(), just after clock tree initialization. Signed-off-by: Patrick Delaunay Reviewed-by: Patrice Chotard --- board/dhelectronics/dh_stm32mp1/board.c | 9 ++++++++- board/st/common/stpmic1.c | 23 ++++++++++++++++++++++- board/st/common/stpmic1.h | 2 +- board/st/stm32mp1/spl.c | 11 ++++++++++- 4 files changed, 41 insertions(+), 4 deletions(-) diff --git a/board/dhelectronics/dh_stm32mp1/board.c b/board/dhelectronics/dh_stm32mp1/board.c index 0e745ec..b2b4f39 100644 --- a/board/dhelectronics/dh_stm32mp1/board.c +++ b/board/dhelectronics/dh_stm32mp1/board.c @@ -140,6 +140,7 @@ int checkboard(void) static u8 brdcode __section("data"); static u8 ddr3code __section("data"); static u8 somcode __section("data"); +static u32 opp_voltage_mv __section(".data"); static void board_get_coding_straps(void) { @@ -197,10 +198,16 @@ int board_stm32mp1_ddr_config_name_match(struct udevice *dev, return -EINVAL; } +void board_vddcore_init(u32 voltage_mv) +{ + if (IS_ENABLED(CONFIG_SPL_BUILD)) + opp_voltage_mv = voltage_mv; +} + int board_early_init_f(void) { if (IS_ENABLED(CONFIG_SPL_BUILD)) - stpmic1_init(); + stpmic1_init(opp_voltage_mv); board_get_coding_straps(); return 0; diff --git a/board/st/common/stpmic1.c b/board/st/common/stpmic1.c index 85f9505..3aa379e 100644 --- a/board/st/common/stpmic1.c +++ b/board/st/common/stpmic1.c @@ -164,8 +164,25 @@ int board_ddr_power_init(enum ddr_type ddr_type) return 0; } +static int stmpic_buck1_set(struct udevice *dev, u32 voltage_mv) +{ + u32 value; + + /* VDDCORE= STMPCI1 BUCK1 ramp=+25mV, 5 => 725mV, 36 => 1500mV */ + value = ((voltage_mv - 725) / 25) + 5; + if (value < 5) + value = 5; + if (value > 36) + value = 36; + + return pmic_clrsetbits(dev, + STPMIC1_BUCKX_MAIN_CR(STPMIC1_BUCK1), + STPMIC1_BUCK_VOUT_MASK, + STPMIC1_BUCK_VOUT(value)); +} + /* early init of PMIC */ -void stpmic1_init(void) +void stpmic1_init(u32 voltage_mv) { struct udevice *dev; @@ -173,6 +190,10 @@ void stpmic1_init(void) DM_GET_DRIVER(pmic_stpmic1), &dev)) return; + /* update VDDCORE = BUCK1 */ + if (voltage_mv) + stmpic_buck1_set(dev, voltage_mv); + /* Keep vdd on during the reset cycle */ pmic_clrsetbits(dev, STPMIC1_BUCKS_MRST_CR, diff --git a/board/st/common/stpmic1.h b/board/st/common/stpmic1.h index ecc3276..b17d6f1 100644 --- a/board/st/common/stpmic1.h +++ b/board/st/common/stpmic1.h @@ -3,4 +3,4 @@ * Copyright (C) 2020, STMicroelectronics - All Rights Reserved */ -void stpmic1_init(void); +void stpmic1_init(u32 voltage_mv); diff --git a/board/st/stm32mp1/spl.c b/board/st/stm32mp1/spl.c index fa25cef..9a83da8 100644 --- a/board/st/stm32mp1/spl.c +++ b/board/st/stm32mp1/spl.c @@ -9,10 +9,19 @@ #include #include "../common/stpmic1.h" +/* board early initialisation in board_f: need to use global variable */ +static u32 opp_voltage_mv __section(".data"); + +void board_vddcore_init(u32 voltage_mv) +{ + if (IS_ENABLED(CONFIG_PMIC_STPMIC1) && CONFIG_IS_ENABLED(POWER_SUPPORT)) + opp_voltage_mv = voltage_mv; +} + int board_early_init_f(void) { if (IS_ENABLED(CONFIG_PMIC_STPMIC1) && CONFIG_IS_ENABLED(POWER_SUPPORT)) - stpmic1_init(); + stpmic1_init(opp_voltage_mv); return 0; } -- 2.7.4