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https://github.com/AsahiLinux/u-boot
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2fcf033d36
Move the axp-gpio code out of the drivers/power/axp*.c code, and into a new separate axpi-gpio driver. This change drops supports for the gpio3 pin on the axp209, as that requires special handling, and no boards are using it. Besides cleaning things up by moving the code to a separate driver, as a bonus this change also adds support for the (non vusb) gpio pins on the axp221 and the gpio pins on the axp152. The new axp-gpio driver gets its own Kconfig option, and is only enabled on boards which need it. Besides that it only gets enabled in the regular u-boot build and not for the SPL as we never need it in the SPL. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Simon Glass <sjg@chromium.org> Acked-by: Ian Campbell <ijc@hellion.org.uk>
157 lines
2.8 KiB
C
157 lines
2.8 KiB
C
/*
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* (C) Copyright 2012
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* Henrik Nordstrom <henrik@henriknordstrom.net>
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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 <i2c.h>
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#include <asm/arch/gpio.h>
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#include <axp209.h>
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static int axp209_write(enum axp209_reg reg, u8 val)
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{
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return i2c_write(0x34, reg, 1, &val, 1);
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}
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static int axp209_read(enum axp209_reg reg, u8 *val)
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{
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return i2c_read(0x34, reg, 1, val, 1);
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}
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static u8 axp209_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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int axp209_set_dcdc2(int mvolt)
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{
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int rc;
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u8 cfg, current;
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cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25);
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/* Do we really need to be this gentle? It has built-in voltage slope */
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while ((rc = axp209_read(AXP209_DCDC2_VOLTAGE, ¤t)) == 0 &&
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current != cfg) {
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if (current < cfg)
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current++;
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else
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current--;
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rc = axp209_write(AXP209_DCDC2_VOLTAGE, current);
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if (rc)
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break;
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}
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return rc;
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}
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int axp209_set_dcdc3(int mvolt)
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{
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u8 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
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return axp209_write(AXP209_DCDC3_VOLTAGE, cfg);
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}
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int axp209_set_ldo2(int mvolt)
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{
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int rc;
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u8 cfg, reg;
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cfg = axp209_mvolt_to_cfg(mvolt, 1800, 3300, 100);
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rc = axp209_read(AXP209_LDO24_VOLTAGE, ®);
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if (rc)
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return rc;
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/* LDO2 configuration is in upper 4 bits */
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reg = (reg & 0x0f) | (cfg << 4);
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return axp209_write(AXP209_LDO24_VOLTAGE, reg);
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}
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int axp209_set_ldo3(int mvolt)
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{
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u8 cfg;
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if (mvolt == -1)
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cfg = 0x80; /* determined by LDO3IN pin */
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else
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cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
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return axp209_write(AXP209_LDO3_VOLTAGE, cfg);
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}
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int axp209_set_ldo4(int mvolt)
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{
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int rc;
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static const int vindex[] = {
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1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500,
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2700, 2800, 3000, 3100, 3200, 3300
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};
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u8 cfg, reg;
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/* Translate mvolt to register cfg value, requested <= selected */
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for (cfg = 15; vindex[cfg] > mvolt && cfg > 0; cfg--);
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rc = axp209_read(AXP209_LDO24_VOLTAGE, ®);
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if (rc)
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return rc;
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/* LDO4 configuration is in lower 4 bits */
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reg = (reg & 0xf0) | (cfg << 0);
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return axp209_write(AXP209_LDO24_VOLTAGE, reg);
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}
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int axp209_init(void)
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{
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u8 ver;
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int i, rc;
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rc = axp209_read(AXP209_CHIP_VERSION, &ver);
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if (rc)
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return rc;
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/* Low 4 bits is chip version */
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ver &= 0x0f;
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if (ver != 0x1)
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return -1;
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/* Mask all interrupts */
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for (i = AXP209_IRQ_ENABLE1; i <= AXP209_IRQ_ENABLE5; i++) {
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rc = axp209_write(i, 0);
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if (rc)
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return rc;
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}
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return 0;
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}
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int axp209_poweron_by_dc(void)
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{
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u8 v;
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if (axp209_read(AXP209_POWER_STATUS, &v))
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return 0;
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return (v & AXP209_POWER_STATUS_ON_BY_DC);
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}
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int axp209_power_button(void)
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{
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u8 v;
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if (axp209_read(AXP209_IRQ_STATUS5, &v))
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return 0;
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axp209_write(AXP209_IRQ_STATUS5, AXP209_IRQ5_PEK_DOWN);
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return v & AXP209_IRQ5_PEK_DOWN;
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}
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