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https://github.com/brain-hackers/u-boot-brain
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6906df1ab8
And also add Kconfig option for selecting ELDO3 voltage. The reason for having this option is that the Android kernel sets ELDO3 to 1.2V when powering up LCD in the case if 'lcd_if' configuration variable is set to 6 (LCD_IF_EXT_DSI) in the FEX file. Most likely to supply power for a SSD2828 chip. However on the MSI Primo81 tablet, which is using this particular 'lcd_if = 6' setup for LCD, setting the ELDO3 voltage appears to be unnecessary and it works regardless. Having no schematics of this tablet, I can only guess that 1.2V is supplied to SSD2828 in some other way. Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
425 lines
8.3 KiB
C
425 lines
8.3 KiB
C
/*
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* AXP221 and AXP223 driver
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*
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* IMPORTANT when making changes to this file check that the registers
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* used are the same for the axp221 and axp223.
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*
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* (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com>
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* (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <errno.h>
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#include <asm/arch/p2wi.h>
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#include <asm/arch/rsb.h>
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#include <axp221.h>
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/*
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* The axp221 uses the p2wi bus, the axp223 is identical (for all registers
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* used sofar) but uses the rsb bus. These functions abstract this.
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*/
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static int pmic_bus_init(void)
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{
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#ifdef CONFIG_MACH_SUN6I
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p2wi_init();
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return p2wi_change_to_p2wi_mode(AXP221_CHIP_ADDR, AXP221_CTRL_ADDR,
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AXP221_INIT_DATA);
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#else
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int ret;
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rsb_init();
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ret = rsb_set_device_mode(AXP223_DEVICE_MODE_DATA);
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if (ret)
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return ret;
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return rsb_set_device_address(AXP223_DEVICE_ADDR, AXP223_RUNTIME_ADDR);
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#endif
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}
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static int pmic_bus_read(const u8 addr, u8 *data)
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{
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#ifdef CONFIG_MACH_SUN6I
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return p2wi_read(addr, data);
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#else
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return rsb_read(AXP223_RUNTIME_ADDR, addr, data);
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#endif
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}
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static int pmic_bus_write(const u8 addr, u8 data)
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{
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#ifdef CONFIG_MACH_SUN6I
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return p2wi_write(addr, data);
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#else
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return rsb_write(AXP223_RUNTIME_ADDR, addr, data);
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#endif
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}
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static u8 axp221_mvolt_to_cfg(int mvolt, int min, int max, int div)
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{
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if (mvolt < min)
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mvolt = min;
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else if (mvolt > max)
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mvolt = max;
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return (mvolt - min) / div;
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}
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static int axp221_setbits(u8 reg, u8 bits)
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{
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int ret;
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u8 val;
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ret = pmic_bus_read(reg, &val);
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if (ret)
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return ret;
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val |= bits;
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return pmic_bus_write(reg, val);
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}
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static int axp221_clrbits(u8 reg, u8 bits)
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{
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int ret;
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u8 val;
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ret = pmic_bus_read(reg, &val);
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if (ret)
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return ret;
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val &= ~bits;
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return pmic_bus_write(reg, val);
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}
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int axp221_set_dcdc1(unsigned int mvolt)
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{
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int ret;
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u8 cfg = axp221_mvolt_to_cfg(mvolt, 1600, 3400, 100);
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if (mvolt == 0)
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return axp221_clrbits(AXP221_OUTPUT_CTRL1,
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AXP221_OUTPUT_CTRL1_DCDC1_EN);
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ret = pmic_bus_write(AXP221_DCDC1_CTRL, cfg);
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if (ret)
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return ret;
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ret = axp221_setbits(AXP221_OUTPUT_CTRL2,
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AXP221_OUTPUT_CTRL2_DCDC1SW_EN);
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if (ret)
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return ret;
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return axp221_setbits(AXP221_OUTPUT_CTRL1,
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AXP221_OUTPUT_CTRL1_DCDC1_EN);
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}
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int axp221_set_dcdc2(unsigned int mvolt)
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{
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int ret;
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u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1540, 20);
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if (mvolt == 0)
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return axp221_clrbits(AXP221_OUTPUT_CTRL1,
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AXP221_OUTPUT_CTRL1_DCDC2_EN);
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ret = pmic_bus_write(AXP221_DCDC2_CTRL, cfg);
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if (ret)
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return ret;
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return axp221_setbits(AXP221_OUTPUT_CTRL1,
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AXP221_OUTPUT_CTRL1_DCDC2_EN);
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}
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int axp221_set_dcdc3(unsigned int mvolt)
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{
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int ret;
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u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1860, 20);
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if (mvolt == 0)
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return axp221_clrbits(AXP221_OUTPUT_CTRL1,
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AXP221_OUTPUT_CTRL1_DCDC3_EN);
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ret = pmic_bus_write(AXP221_DCDC3_CTRL, cfg);
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if (ret)
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return ret;
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return axp221_setbits(AXP221_OUTPUT_CTRL1,
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AXP221_OUTPUT_CTRL1_DCDC3_EN);
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}
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int axp221_set_dcdc4(unsigned int mvolt)
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{
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int ret;
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u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1540, 20);
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if (mvolt == 0)
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return axp221_clrbits(AXP221_OUTPUT_CTRL1,
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AXP221_OUTPUT_CTRL1_DCDC4_EN);
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ret = pmic_bus_write(AXP221_DCDC4_CTRL, cfg);
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if (ret)
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return ret;
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return axp221_setbits(AXP221_OUTPUT_CTRL1,
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AXP221_OUTPUT_CTRL1_DCDC4_EN);
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}
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int axp221_set_dcdc5(unsigned int mvolt)
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{
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int ret;
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u8 cfg = axp221_mvolt_to_cfg(mvolt, 1000, 2550, 50);
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if (mvolt == 0)
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return axp221_clrbits(AXP221_OUTPUT_CTRL1,
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AXP221_OUTPUT_CTRL1_DCDC5_EN);
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ret = pmic_bus_write(AXP221_DCDC5_CTRL, cfg);
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if (ret)
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return ret;
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return axp221_setbits(AXP221_OUTPUT_CTRL1,
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AXP221_OUTPUT_CTRL1_DCDC5_EN);
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}
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int axp221_set_dldo1(unsigned int mvolt)
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{
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int ret;
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u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
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if (mvolt == 0)
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return axp221_clrbits(AXP221_OUTPUT_CTRL2,
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AXP221_OUTPUT_CTRL2_DLDO1_EN);
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ret = pmic_bus_write(AXP221_DLDO1_CTRL, cfg);
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if (ret)
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return ret;
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return axp221_setbits(AXP221_OUTPUT_CTRL2,
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AXP221_OUTPUT_CTRL2_DLDO1_EN);
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}
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int axp221_set_dldo2(unsigned int mvolt)
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{
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int ret;
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u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
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if (mvolt == 0)
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return axp221_clrbits(AXP221_OUTPUT_CTRL2,
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AXP221_OUTPUT_CTRL2_DLDO2_EN);
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ret = pmic_bus_write(AXP221_DLDO2_CTRL, cfg);
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if (ret)
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return ret;
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return axp221_setbits(AXP221_OUTPUT_CTRL2,
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AXP221_OUTPUT_CTRL2_DLDO2_EN);
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}
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int axp221_set_dldo3(unsigned int mvolt)
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{
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int ret;
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u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
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if (mvolt == 0)
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return axp221_clrbits(AXP221_OUTPUT_CTRL2,
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AXP221_OUTPUT_CTRL2_DLDO3_EN);
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ret = pmic_bus_write(AXP221_DLDO3_CTRL, cfg);
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if (ret)
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return ret;
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return axp221_setbits(AXP221_OUTPUT_CTRL2,
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AXP221_OUTPUT_CTRL2_DLDO3_EN);
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}
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int axp221_set_dldo4(unsigned int mvolt)
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{
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int ret;
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u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
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if (mvolt == 0)
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return axp221_clrbits(AXP221_OUTPUT_CTRL2,
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AXP221_OUTPUT_CTRL2_DLDO4_EN);
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ret = pmic_bus_write(AXP221_DLDO4_CTRL, cfg);
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if (ret)
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return ret;
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return axp221_setbits(AXP221_OUTPUT_CTRL2,
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AXP221_OUTPUT_CTRL2_DLDO4_EN);
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}
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int axp221_set_aldo1(unsigned int mvolt)
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{
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int ret;
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u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
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if (mvolt == 0)
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return axp221_clrbits(AXP221_OUTPUT_CTRL1,
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AXP221_OUTPUT_CTRL1_ALDO1_EN);
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ret = pmic_bus_write(AXP221_ALDO1_CTRL, cfg);
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if (ret)
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return ret;
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return axp221_setbits(AXP221_OUTPUT_CTRL1,
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AXP221_OUTPUT_CTRL1_ALDO1_EN);
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}
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int axp221_set_aldo2(unsigned int mvolt)
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{
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int ret;
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u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
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if (mvolt == 0)
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return axp221_clrbits(AXP221_OUTPUT_CTRL1,
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AXP221_OUTPUT_CTRL1_ALDO2_EN);
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ret = pmic_bus_write(AXP221_ALDO2_CTRL, cfg);
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if (ret)
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return ret;
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return axp221_setbits(AXP221_OUTPUT_CTRL1,
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AXP221_OUTPUT_CTRL1_ALDO2_EN);
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}
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int axp221_set_aldo3(unsigned int mvolt)
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{
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int ret;
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u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
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if (mvolt == 0)
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return axp221_clrbits(AXP221_OUTPUT_CTRL3,
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AXP221_OUTPUT_CTRL3_ALDO3_EN);
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ret = pmic_bus_write(AXP221_ALDO3_CTRL, cfg);
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if (ret)
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return ret;
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return axp221_setbits(AXP221_OUTPUT_CTRL3,
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AXP221_OUTPUT_CTRL3_ALDO3_EN);
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}
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int axp221_set_eldo(int eldo_num, unsigned int mvolt)
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{
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int ret;
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u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
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u8 addr, bits;
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switch (eldo_num) {
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case 3:
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addr = AXP221_ELDO3_CTRL;
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bits = AXP221_OUTPUT_CTRL2_ELDO3_EN;
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break;
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case 2:
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addr = AXP221_ELDO2_CTRL;
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bits = AXP221_OUTPUT_CTRL2_ELDO2_EN;
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break;
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case 1:
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addr = AXP221_ELDO1_CTRL;
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bits = AXP221_OUTPUT_CTRL2_ELDO1_EN;
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break;
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default:
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return -EINVAL;
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}
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if (mvolt == 0)
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return axp221_clrbits(AXP221_OUTPUT_CTRL2, bits);
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ret = pmic_bus_write(addr, cfg);
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if (ret)
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return ret;
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return axp221_setbits(AXP221_OUTPUT_CTRL2, bits);
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}
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int axp221_init(void)
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{
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/* This cannot be 0 because it is used in SPL before BSS is ready */
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static int needs_init = 1;
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u8 axp_chip_id;
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int ret;
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if (!needs_init)
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return 0;
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ret = pmic_bus_init();
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if (ret)
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return ret;
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ret = pmic_bus_read(AXP221_CHIP_ID, &axp_chip_id);
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if (ret)
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return ret;
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if (!(axp_chip_id == 0x6 || axp_chip_id == 0x7 || axp_chip_id == 0x17))
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return -ENODEV;
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needs_init = 0;
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return 0;
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}
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int axp221_get_sid(unsigned int *sid)
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{
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u8 *dest = (u8 *)sid;
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int i, ret;
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ret = axp221_init();
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if (ret)
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return ret;
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ret = pmic_bus_write(AXP221_PAGE, 1);
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if (ret)
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return ret;
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for (i = 0; i < 16; i++) {
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ret = pmic_bus_read(AXP221_SID + i, &dest[i]);
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if (ret)
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return ret;
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}
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pmic_bus_write(AXP221_PAGE, 0);
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for (i = 0; i < 4; i++)
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sid[i] = be32_to_cpu(sid[i]);
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return 0;
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}
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static int axp_drivebus_setup(void)
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{
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int ret;
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ret = axp221_init();
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if (ret)
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return ret;
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/* Set N_VBUSEN pin to output / DRIVEBUS function */
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return axp221_clrbits(AXP221_MISC_CTRL, AXP221_MISC_CTRL_N_VBUSEN_FUNC);
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}
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int axp_drivebus_enable(void)
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{
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int ret;
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ret = axp_drivebus_setup();
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if (ret)
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return ret;
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/* Set DRIVEBUS high */
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return axp221_setbits(AXP221_VBUS_IPSOUT, AXP221_VBUS_IPSOUT_DRIVEBUS);
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}
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int axp_drivebus_disable(void)
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{
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int ret;
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ret = axp_drivebus_setup();
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if (ret)
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return ret;
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/* Set DRIVEBUS low */
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return axp221_clrbits(AXP221_VBUS_IPSOUT, AXP221_VBUS_IPSOUT_DRIVEBUS);
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}
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