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67412e4d7a
For somewhat historical reasons we are doing some initial PMIC regulator setup in BL31, as U-Boot does not (yet) have a PMIC driver. This worked fine so far, but there is at least one board (OrangePi 3) that gets upset, because the Ethernet PHY needs some *coordinated* bringup of *two* regulators. To avoid custom hacks, let's introduce a build option to keep doing the regulator setup in TF-A. Defining SUNXI_SETUP_REGULATORS to 0 will break support for some devices on some boards in U-Boot (Ethernet and HDMI), but will allow to bring up the OrangePi 3 in Linux correctly. We keep the default at 1 to not change the behaviour for all other boards. After U-Boot gained proper PMIC support at some point in the future, we will probably change the default to 0, to get rid of the less optimal PMIC code in TF-A. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Change-Id: Ie8e2583d0396f6eeaae8ffe6b6190f27db63e2a7
59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
/*
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* Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef AXP_H
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#define AXP_H
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#include <stdint.h>
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#define AXP20X_MODE_REG 0x3e
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#define AXP20X_MODE_I2C 0x00
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#define AXP20X_MODE_RSB 0x7c
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#define NA 0xff
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enum {
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AXP803_CHIP_ID = 0x41,
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AXP805_CHIP_ID = 0x40,
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};
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struct axp_regulator {
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const char *dt_name;
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uint16_t min_volt;
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uint16_t max_volt;
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uint16_t step;
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unsigned char split;
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unsigned char volt_reg;
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unsigned char switch_reg;
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unsigned char switch_bit;
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};
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extern const uint8_t axp_chip_id;
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extern const char *const axp_compatible;
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extern const struct axp_regulator axp_regulators[];
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/*
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* Since the PMIC can be connected to multiple bus types,
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* low-level read/write functions must be provided by the platform
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*/
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int axp_read(uint8_t reg);
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int axp_write(uint8_t reg, uint8_t val);
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int axp_clrsetbits(uint8_t reg, uint8_t clr_mask, uint8_t set_mask);
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#define axp_clrbits(reg, clr_mask) axp_clrsetbits(reg, clr_mask, 0)
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#define axp_setbits(reg, set_mask) axp_clrsetbits(reg, 0, set_mask)
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int axp_check_id(void);
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void axp_power_off(void);
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#if SUNXI_SETUP_REGULATORS == 1
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void axp_setup_regulators(const void *fdt);
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#else
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static inline void axp_setup_regulators(const void *fdt)
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{
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}
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#endif
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#endif /* AXP_H */
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