On Fri, 10 May 2024, at 11:43 AM, Andre Przywara wrote:
> On boards using the AXP717 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 AXP717 PMIC driver that knows about the buck converters, so
> that we can set the voltage for the DRAM chips and the CPU cores.
>
> Signed-off-by: Andre Przywara <andre.przyw...@arm.com>
> ---
> arch/arm/mach-sunxi/pmic_bus.c | 3 ++
> board/sunxi/board.c | 2 +-
> drivers/power/Kconfig | 17 +++++--
> drivers/power/Makefile | 1 +
> drivers/power/axp717.c | 92 ++++++++++++++++++++++++++++++++++
> 5 files changed, 110 insertions(+), 5 deletions(-)
> create mode 100644 drivers/power/axp717.c
>
> diff --git a/arch/arm/mach-sunxi/pmic_bus.c b/arch/arm/mach-sunxi/pmic_bus.c
> index 87df312725c..8e19324c8ac 100644
> --- a/arch/arm/mach-sunxi/pmic_bus.c
> +++ b/arch/arm/mach-sunxi/pmic_bus.c
> @@ -19,6 +19,7 @@
> #define AXP152_I2C_ADDR 0x30
>
> #define AXP209_I2C_ADDR 0x34
> +#define AXP717_I2C_ADDR 0x34
>
> #define AXP305_I2C_ADDR 0x36
> #define AXP313_I2C_ADDR 0x36
> @@ -36,6 +37,8 @@ static int pmic_i2c_address(void)
> return AXP305_I2C_ADDR;
> if (IS_ENABLED(CONFIG_AXP313_POWER))
> return AXP313_I2C_ADDR;
> + if (IS_ENABLED(CONFIG_AXP717_POWER))
> + return AXP717_I2C_ADDR;
>
> /* Other AXP2xx and AXP8xx variants */
> return AXP209_I2C_ADDR;
> diff --git a/board/sunxi/board.c b/board/sunxi/board.c
> index 1313b01dcea..2c65f4c93cb 100644
> --- a/board/sunxi/board.c
> +++ b/board/sunxi/board.c
> @@ -563,7 +563,7 @@ 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_AXP313_POWER
> + defined CONFIG_AXP313_POWER || defined CONFIG_AXP717_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 33b8bc1214d..5556a22cf69 100644
> --- a/drivers/power/Kconfig
> +++ b/drivers/power/Kconfig
> @@ -109,6 +109,13 @@ config AXP313_POWER
> Select this to enable support for the AXP313 PMIC found on some
> H616 boards.
>
> +config AXP717_POWER
> + bool "axp717 pmic support"
> + select AXP_PMIC_BUS
> + select CMD_POWEROFF
> + ---help---
> + Select this to enable support for the AXP717 PMIC found on some boards.
> +
> config AXP809_POWER
> bool "axp809 pmic support"
> depends on MACH_SUN9I
> @@ -151,10 +158,11 @@ 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 || AXP313_POWER
> + depends on AXP152_POWER || AXP209_POWER || AXP221_POWER ||
> AXP809_POWER || AXP818_POWER || AXP313_POWER || AXP717_POWER
> default 900 if AXP818_POWER
> default 1400 if AXP152_POWER || AXP209_POWER
> default 1000 if AXP313_POWER
> + default 1000 if AXP717_POWER
> default 1200 if MACH_SUN6I
> default 1100 if MACH_SUN8I
> default 0 if MACH_SUN9I
> @@ -167,11 +175,11 @@ 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.
> + On boards using the AXP313 or AXP717 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 || AXP313_POWER
> + depends on AXP152_POWER || AXP209_POWER || AXP221_POWER ||
> AXP809_POWER || AXP818_POWER || AXP313_POWER || AXP717_POWER
> default 900 if AXP809_POWER || AXP818_POWER
> default 1500 if AXP152_POWER
> default 1250 if AXP209_POWER
> @@ -188,7 +196,8 @@ 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.
> + On boards using the AXP313 or AXP717 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 c7ee4595fc8..41ebb494fff 100644
> --- a/drivers/power/Makefile
> +++ b/drivers/power/Makefile
> @@ -13,6 +13,7 @@ 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-$(CONFIG_AXP717_POWER) += axp717.o
> obj-$(CONFIG_AXP809_POWER) += axp809.o
> obj-$(CONFIG_AXP818_POWER) += axp818.o
> obj-$(CONFIG_EXYNOS_TMU) += exynos-tmu.o
> diff --git a/drivers/power/axp717.c b/drivers/power/axp717.c
> new file mode 100644
> index 00000000000..7c77c09ea8f
> --- /dev/null
> +++ b/drivers/power/axp717.c
> @@ -0,0 +1,92 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * AXP717 SPL driver
> + * (C) Copyright 2024 Arm Ltd.
> + */
> +
> +#include <common.h>
> +#include <command.h>
> +#include <errno.h>
> +#include <asm/arch/pmic_bus.h>
> +#include <axp_pmic.h>
> +
> +enum axp717_reg {
> + AXP717_CHIP_VERSION = 0x3,
> + AXP717_SHUTDOWN = 0x27,
> + AXP717_OUTPUT_CTRL1 = 0x80,
> + AXP717_DCDC1_VOLTAGE = 0x83,
> +};
> +
> +#define AXP717_CHIP_VERSION_MASK 0xc8
> +#define AXP717_DCDC_1220MV_OFFSET 71
> +#define AXP717_POWEROFF (1U << 0)
> +#define DCDC_DVM_ENABLE (1U << 7)
> +
> +static u8 axp_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 = DCDC_DVM_ENABLE;
> +
> + if (dcdc_num < 1 || dcdc_num > 3)
> + return -EINVAL;
> +
> + if (mvolt >= 1220)
> + cfg |= AXP717_DCDC_1220MV_OFFSET +
> + axp_mvolt_to_cfg(mvolt, 1220,
> + dcdc_num == 3 ? 1840 : 1540, 20);
> + else
> + cfg |= axp_mvolt_to_cfg(mvolt, 500, 1200, 10);
> +
> + if (mvolt == 0)
> + return pmic_bus_clrbits(AXP717_OUTPUT_CTRL1,
> + 1U << (dcdc_num -1));
> +
> + ret = pmic_bus_write(AXP717_DCDC1_VOLTAGE + dcdc_num - 1, cfg);
> + if (ret)
> + return ret;
> +
> + return pmic_bus_setbits(AXP717_OUTPUT_CTRL1, 1U << (dcdc_num - 1));
> +}
> +
> +int axp_set_dcdc1(unsigned int mvolt)
> +{
> + return axp_set_dcdc(1, mvolt);
> +}
> +
> +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)
> +{
> + return pmic_bus_init();
> +}
> +
> +#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_setbits(AXP717_SHUTDOWN, AXP717_POWEROFF);
> +
> + /* infinite loop during shutdown */
> + while (1) {}
> +
> + /* not reached */
> + return 0;
> +}
> +#endif
> --
> 2.35.8
Confirmed working on H700 board with AXP717 PMIC and LPDDR4 DRAM controller
(Anbernic RG35XX-H) and verified I2C address and registers from datasheet.
Reviewed-by: Ryan Walklin <r...@testtoast.com>
Regards,
Ryan
