On Wednesday, October 18, 2023 5:50:13 PM CEST Andre Przywara wrote: > On boards using the AXP313 PMIC, the DRAM rail is often not setup > correctly at reset time, so we have to program the PMIC very early in > the SPL, before running the DRAM initialisation. > > Add a simple AXP313 PMIC driver that knows about DCDC2(CPU) and > DCDC3(DRAM), so that we can bump up the voltage before the DRAM init. > > Signed-off-by: Andre Przywara <andre.przyw...@arm.com> > --- > arch/arm/mach-sunxi/pmic_bus.c | 3 + > board/sunxi/board.c | 3 +- > drivers/power/Kconfig | 17 ++++- > drivers/power/Makefile | 1 + > drivers/power/axp313.c | 134 +++++++++++++++++++++++++++++++++ > 5 files changed, 155 insertions(+), 3 deletions(-) > create mode 100644 drivers/power/axp313.c > > diff --git a/arch/arm/mach-sunxi/pmic_bus.c b/arch/arm/mach-sunxi/pmic_bus.c > index c0908406370..8e7625fe057 100644 > --- a/arch/arm/mach-sunxi/pmic_bus.c > +++ b/arch/arm/mach-sunxi/pmic_bus.c > @@ -22,6 +22,7 @@ > #define AXP209_I2C_ADDR 0x34 > > #define AXP305_I2C_ADDR 0x36 > +#define AXP313_I2C_ADDR 0x36 > > #define AXP221_CHIP_ADDR 0x68 > > @@ -34,6 +35,8 @@ static int pmic_i2c_address(void) > return AXP152_I2C_ADDR; > if (IS_ENABLED(CONFIG_AXP305_POWER)) > return AXP305_I2C_ADDR; > + if (IS_ENABLED(CONFIG_AXP313_POWER)) > + return AXP313_I2C_ADDR; > > /* Other AXP2xx and AXP8xx variants */ > return AXP209_I2C_ADDR; > diff --git a/board/sunxi/board.c b/board/sunxi/board.c > index 65d79a02c25..39b0ad73a9c 100644 > --- a/board/sunxi/board.c > +++ b/board/sunxi/board.c > @@ -584,7 +584,8 @@ void sunxi_board_init(void) > > #if defined CONFIG_AXP152_POWER || defined CONFIG_AXP209_POWER || \ > defined CONFIG_AXP221_POWER || defined CONFIG_AXP305_POWER || \ > - defined CONFIG_AXP809_POWER || defined CONFIG_AXP818_POWER > + defined CONFIG_AXP809_POWER || defined CONFIG_AXP818_POWER || \ > + defined CONFIG_AXP313_POWER > power_failed = axp_init(); > > if (IS_ENABLED(CONFIG_AXP_DISABLE_BOOT_ON_POWERON) && ! power_failed) { > diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig > index 83cb31c937a..a9117d215eb 100644 > --- a/drivers/power/Kconfig > +++ b/drivers/power/Kconfig > @@ -101,6 +101,15 @@ config AXP305_POWER > Select this to enable support for the axp305 pmic found on most > H616 boards. > > +config AXP313_POWER > + bool "axp311 pmic support"
Typo: axp311 -> axp313 Other than that, it looks good. I can't test it since I don't have any hardware with such PMIC. So FWIW: Acked-by: Jernej Skrabec <jernej.skra...@gmail.com> Best regards, Jernej > + depends on MACH_SUN50I_H616 > + select AXP_PMIC_BUS > + select CMD_POWEROFF > + ---help--- > + Select this to enable support for the AXP313 PMIC found on some > + H616 boards. > + > config AXP809_POWER > bool "axp809 pmic support" > depends on MACH_SUN9I > @@ -143,9 +152,10 @@ config AXP_DCDC1_VOLT > > config AXP_DCDC2_VOLT > int "axp pmic dcdc2 voltage" > - depends on AXP152_POWER || AXP209_POWER || AXP221_POWER || AXP809_POWER || > AXP818_POWER + depends on AXP152_POWER || AXP209_POWER || AXP221_POWER || > AXP809_POWER || AXP818_POWER || AXP313_POWER default 900 if AXP818_POWER > default 1400 if AXP152_POWER || AXP209_POWER > + default 1000 if AXP313_POWER > default 1200 if MACH_SUN6I > default 1100 if MACH_SUN8I > default 0 if MACH_SUN9I > @@ -158,13 +168,15 @@ config AXP_DCDC2_VOLT > On A80 boards dcdc2 powers the GPU and can be left off. > On A83T boards dcdc2 is used for VDD-CPUA(cluster 0) and should be 0.9V. > On R40 boards dcdc2 is VDD-CPU and should be 1.1V > + On boards using the AXP313 it's often VDD-CPU. > > config AXP_DCDC3_VOLT > int "axp pmic dcdc3 voltage" > - depends on AXP152_POWER || AXP209_POWER || AXP221_POWER || AXP809_POWER || > AXP818_POWER + depends on AXP152_POWER || AXP209_POWER || AXP221_POWER || > AXP809_POWER || AXP818_POWER || AXP313_POWER default 900 if AXP809_POWER || > AXP818_POWER > default 1500 if AXP152_POWER > default 1250 if AXP209_POWER > + default 1100 if AXP313_POWER > default 1100 if MACH_SUN8I_R40 > default 1200 if MACH_SUN6I || MACH_SUN8I > ---help--- > @@ -177,6 +189,7 @@ config AXP_DCDC3_VOLT > On A80 boards dcdc3 is used for VDD-CPUA(cluster 0) and should be 0.9V. > On A83T boards dcdc3 is used for VDD-CPUB(cluster 1) and should be 0.9V. > On R40 boards dcdc3 is VDD-SYS and VDD-GPU and should be 1.1V. > + On boards using the AXP313 it's often VDD-DRAM and should be 1.1V for > LPDDR4. > > config AXP_DCDC4_VOLT > int "axp pmic dcdc4 voltage" > diff --git a/drivers/power/Makefile b/drivers/power/Makefile > index ba64b2c5938..c7ee4595fc8 100644 > --- a/drivers/power/Makefile > +++ b/drivers/power/Makefile > @@ -12,6 +12,7 @@ obj-$(CONFIG_AXP152_POWER) += axp152.o > obj-$(CONFIG_AXP209_POWER) += axp209.o > obj-$(CONFIG_AXP221_POWER) += axp221.o > obj-$(CONFIG_AXP305_POWER) += axp305.o > +obj-$(CONFIG_AXP313_POWER) += axp313.o > obj-$(CONFIG_AXP809_POWER) += axp809.o > obj-$(CONFIG_AXP818_POWER) += axp818.o > obj-$(CONFIG_EXYNOS_TMU) += exynos-tmu.o > diff --git a/drivers/power/axp313.c b/drivers/power/axp313.c > new file mode 100644 > index 00000000000..bbc9e911115 > --- /dev/null > +++ b/drivers/power/axp313.c > @@ -0,0 +1,134 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * AXP313(a) driver > + * > + * (C) Copyright 2023 Arm Ltd. > + * > + * Based on axp305.c > + * (C) Copyright 2020 Jernej Skrabec <jernej.skra...@siol.net> > + * (C) Copyright 2014 Hans de Goede <hdego...@redhat.com> > + * (C) Copyright 2013 Oliver Schinagl <oli...@schinagl.nl> > + */ > + > +#include <common.h> > +#include <command.h> > +#include <errno.h> > +#include <asm/arch/pmic_bus.h> > +#include <axp_pmic.h> > + > +enum axp313_reg { > + AXP313_CHIP_VERSION = 0x03, > + AXP313_OUTPUT_CTRL = 0x10, > + AXP313_DCDC1_CTRL = 0x13, > + AXP313_SHUTDOWN = 0x1a, > +}; > + > +#define AXP313_CHIP_VERSION_MASK 0xcf > +#define AXP313_CHIP_VERSION_AXP1530 0x48 > +#define AXP313_CHIP_VERSION_AXP313A 0x4b > +#define AXP313_CHIP_VERSION_AXP313B 0x4c > + > +#define AXP313_DCDC_SPLIT_OFFSET 71 > +#define AXP313_DCDC_SPLIT_MVOLT 1200 > + > +#define AXP313_POWEROFF BIT(7) > + > +static u8 mvolt_to_cfg(int mvolt, int min, int max, int div) > +{ > + if (mvolt < min) > + mvolt = min; > + else if (mvolt > max) > + mvolt = max; > + > + return (mvolt - min) / div; > +} > + > +static int axp_set_dcdc(int dcdc_num, unsigned int mvolt) > +{ > + int ret; > + u8 cfg, enable_mask = 1U << (dcdc_num - 1); > + int volt_reg = AXP313_DCDC1_CTRL + dcdc_num - 1; > + int max_mV; > + > + switch (dcdc_num) { > + case 1: > + case 2: > + max_mV = 1540; > + break; > + case 3: > + /* > + * The manual defines a different split point, but tests > + * show that it's the same 1200mV as for DCDC1/2. > + */ > + max_mV = 1840; > + break; > + default: > + return -EINVAL; > + } > + > + if (mvolt > AXP313_DCDC_SPLIT_MVOLT) > + cfg = AXP313_DCDC_SPLIT_OFFSET + mvolt_to_cfg(mvolt, > + AXP313_DCDC_SPLIT_MVOLT + 20, max_mV, 20); > + else > + cfg = mvolt_to_cfg(mvolt, 500, AXP313_DCDC_SPLIT_MVOLT, 10); > + > + if (mvolt == 0) > + return pmic_bus_clrbits(AXP313_OUTPUT_CTRL, enable_mask); > + > + debug("DCDC%d: writing 0x%x to reg 0x%x\n", dcdc_num, cfg, volt_reg); > + ret = pmic_bus_write(volt_reg, cfg); > + if (ret) > + return ret; > + > + return pmic_bus_setbits(AXP313_OUTPUT_CTRL, enable_mask); > +} > + > +int axp_set_dcdc2(unsigned int mvolt) > +{ > + return axp_set_dcdc(2, mvolt); > +} > + > +int axp_set_dcdc3(unsigned int mvolt) > +{ > + return axp_set_dcdc(3, mvolt); > +} > + > +int axp_init(void) > +{ > + u8 axp_chip_id; > + int ret; > + > + ret = pmic_bus_init(); > + if (ret) > + return ret; > + > + ret = pmic_bus_read(AXP313_CHIP_VERSION, &axp_chip_id); > + if (ret) > + return ret; > + > + axp_chip_id &= AXP313_CHIP_VERSION_MASK; > + switch (axp_chip_id) { > + case AXP313_CHIP_VERSION_AXP1530: > + case AXP313_CHIP_VERSION_AXP313A: > + case AXP313_CHIP_VERSION_AXP313B: > + break; > + default: > + debug("unknown PMIC: 0x%x\n", axp_chip_id); > + return -EINVAL; > + } > + > + return ret; > +} > + > +#if !CONFIG_IS_ENABLED(ARM_PSCI_FW) && > !IS_ENABLED(CONFIG_SYSRESET_CMD_POWEROFF) +int do_poweroff(struct cmd_tbl > *cmdtp, int flag, int argc, char *const argv[]) +{ > + pmic_bus_write(AXP313_SHUTDOWN, AXP313_POWEROFF); > + > + /* infinite loop during shutdown */ > + while (1) {} > + > + /* not reached */ > + return 0; > +} > +#endif