[PATCH 2/3] power: pmic: sunxi: add AXP313 SPL driver
Jernej Škrabec
jernej.skrabec at gmail.com
Sat Oct 21 08:39:48 CEST 2023
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.przywara at 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.skrabec at 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.skrabec at siol.net>
> + * (C) Copyright 2014 Hans de Goede <hdegoede at redhat.com>
> + * (C) Copyright 2013 Oliver Schinagl <oliver at 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
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