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drivers: allwinner: axp: Add AXP805 support 

This adds the new regulator list, as well as changes to make the switch
(equivalent to DC1SW on the AXP803) work on both PMICs.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Change-Id: I9a1eac8ddfc54b27096c10a8eebdd51aaf9b8311
This commit is contained in:
Samuel Holland 2019-10-20 22:23:33 -05:00
parent 0bc752c9ad
commit f6d9c4cafa
3 changed files with 52 additions and 12 deletions
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33
drivers/allwinner/axp/axp805.c Normal file
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@ -0,0 +1,33 @@
/*
* Copyright (c) 2019, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <drivers/allwinner/axp.h>
const uint8_t axp_chip_id = AXP805_CHIP_ID;
const char *const axp_compatible = "x-powers,axp805";
/*
* The "dcdcd" split changes the step size by a factor of 5, not 2;
* disallow values above the split to maintain accuracy.
*/
const struct axp_regulator axp_regulators[] = {
{"dcdca", 600, 1520, 10, 50, 0x12, 0x10, 0},
{"dcdcb", 1000, 2550, 50, NA, 0x13, 0x10, 1},
{"dcdcc", 600, 1520, 10, 50, 0x14, 0x10, 2},
{"dcdcd", 600, 1500, 20, NA, 0x15, 0x10, 3},
{"dcdce", 1100, 3400, 100, NA, 0x16, 0x10, 4},
{"aldo1", 700, 3300, 100, NA, 0x17, 0x10, 5},
{"aldo2", 700, 3300, 100, NA, 0x18, 0x10, 6},
{"aldo3", 700, 3300, 100, NA, 0x19, 0x10, 7},
{"bldo1", 700, 1900, 100, NA, 0x20, 0x11, 0},
{"bldo2", 700, 1900, 100, NA, 0x21, 0x11, 1},
{"bldo3", 700, 1900, 100, NA, 0x22, 0x11, 2},
{"bldo4", 700, 1900, 100, NA, 0x23, 0x11, 3},
{"cldo1", 700, 3300, 100, NA, 0x24, 0x11, 4},
{"cldo2", 700, 4200, 100, 27, 0x25, 0x11, 5},
{"cldo3", 700, 3300, 100, NA, 0x26, 0x11, 6},
{}
};

30
drivers/allwinner/axp/common.c
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@ -108,7 +108,7 @@ static bool should_enable_regulator(const void *fdt, int node)
void axp_setup_regulators(const void *fdt)
{
int node;
bool dc1sw = false;
bool sw = false;
if (fdt == NULL)
return;
@ -120,6 +120,7 @@ void axp_setup_regulators(const void *fdt)
return;
}
/* This applies to AXP803 only. */
if (fdt_getprop(fdt, node, "x-powers,drive-vbus-en", NULL)) {
axp_clrbits(0x8f, BIT(4));
axp_setbits(0x30, BIT(2));
@ -144,26 +145,31 @@ void axp_setup_regulators(const void *fdt)
continue;
name = fdt_get_name(fdt, node, &length);
/* Enable the switch last to avoid overheating. */
if (!strncmp(name, "dc1sw", length) ||
!strncmp(name, "sw", length)) {
sw = true;
continue;
}
for (reg = axp_regulators; reg->dt_name; reg++) {
if (!strncmp(name, reg->dt_name, length)) {
setup_regulator(fdt, node, reg);
break;
}
}
if (!strncmp(name, "dc1sw", length)) {
/* Delay DC1SW enablement to avoid overheating. */
dc1sw = true;
continue;
}
}
/*
* If DLDO2 is enabled after DC1SW, the PMIC overheats and shuts
* down. So always enable DC1SW as the very last regulator.
* On the AXP803, if DLDO2 is enabled after DC1SW, the PMIC overheats
* and shuts down. So always enable DC1SW as the very last regulator.
*/
if (dc1sw) {
INFO("PMIC: Enabling DC1SW\n");
axp_setbits(0x12, BIT(7));
if (sw) {
INFO("PMIC: Enabling DC SW\n");
if (axp_chip_id == AXP803_CHIP_ID)
axp_setbits(0x12, BIT(7));
if (axp_chip_id == AXP805_CHIP_ID)
axp_setbits(0x11, BIT(7));
}
}

1
include/drivers/allwinner/axp.h
View File

@ -13,6 +13,7 @@
enum {
AXP803_CHIP_ID = 0x41,
AXP805_CHIP_ID = 0x40,
};
struct axp_regulator {