d3b02987cb
Instead of using the SoC symbols to decide the bus type, use whichever bus driver is actually enabled. This allows collapsing all of the AXP2xx and AXP8xx variants into one "else" case. It also has the advantage of falling back to I2C when the other bus drivers are disabled; this works because all of the PMICs support I2C in addition to other interfaces. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
116 lines
2.3 KiB
C
116 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2015 Hans de Goede <hdegoede@redhat.com>
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*
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* Sunxi PMIC bus access helpers
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*
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* The axp152 & axp209 use an i2c bus, the axp221 uses the p2wi bus and the
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* axp223 uses the rsb bus, these functions abstract this.
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*/
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#include <axp_pmic.h>
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#include <common.h>
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#include <asm/arch/p2wi.h>
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#include <asm/arch/rsb.h>
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#include <i2c.h>
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#include <asm/arch/pmic_bus.h>
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#define AXP152_I2C_ADDR 0x30
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#define AXP209_I2C_ADDR 0x34
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#define AXP305_I2C_ADDR 0x36
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#define AXP221_CHIP_ADDR 0x68
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static int pmic_i2c_address(void)
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{
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if (IS_ENABLED(CONFIG_AXP152_POWER))
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return AXP152_I2C_ADDR;
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if (IS_ENABLED(CONFIG_AXP305_POWER))
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return AXP305_I2C_ADDR;
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/* Other AXP2xx and AXP8xx variants */
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return AXP209_I2C_ADDR;
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}
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int pmic_bus_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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int ret = 0;
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if (!needs_init)
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return 0;
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if (IS_ENABLED(CONFIG_SYS_I2C_SUN6I_P2WI)) {
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p2wi_init();
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ret = p2wi_change_to_p2wi_mode(AXP221_CHIP_ADDR,
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AXP_PMIC_MODE_REG,
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AXP_PMIC_MODE_P2WI);
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} else if (IS_ENABLED(CONFIG_SYS_I2C_SUN8I_RSB)) {
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ret = rsb_init();
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if (ret)
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return ret;
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ret = rsb_set_device_address(AXP_PMIC_PRI_DEVICE_ADDR,
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AXP_PMIC_PRI_RUNTIME_ADDR);
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}
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needs_init = ret;
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return ret;
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}
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int pmic_bus_read(u8 reg, u8 *data)
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{
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if (IS_ENABLED(CONFIG_SYS_I2C_SUN6I_P2WI))
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return p2wi_read(reg, data);
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if (IS_ENABLED(CONFIG_SYS_I2C_SUN8I_RSB))
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return rsb_read(AXP_PMIC_PRI_RUNTIME_ADDR, reg, data);
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return i2c_read(pmic_i2c_address(), reg, 1, data, 1);
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}
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int pmic_bus_write(u8 reg, u8 data)
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{
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if (IS_ENABLED(CONFIG_SYS_I2C_SUN6I_P2WI))
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return p2wi_write(reg, data);
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if (IS_ENABLED(CONFIG_SYS_I2C_SUN8I_RSB))
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return rsb_write(AXP_PMIC_PRI_RUNTIME_ADDR, reg, data);
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return i2c_write(pmic_i2c_address(), reg, 1, &data, 1);
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}
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int pmic_bus_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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if ((val & bits) == bits)
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return 0;
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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 pmic_bus_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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if (!(val & bits))
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return 0;
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val &= ~bits;
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return pmic_bus_write(reg, val);
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}
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