leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

sunxi: pmic_bus: Use the DM PMIC interface when possible

Browse Source 
The pmic_bus functions are used in both SPL (for regulator setup) and
U-Boot proper (for regulator setup, SID access, GPIO, and poweroff).

Currently, pmic_bus conflicts with DM_I2C because it uses the legacy I2C
interface. This commit makes pmic_bus dual-compatible with either the
legacy I2C functions or the newly-added PMIC_AXP driver (which uses
DM_I2C). In turn, this allows platforms to start transitioning to DM_I2C
in U-Boot proper, without breaking boards that still depend on the
legacy I2C interface for other reasons.

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>
This commit is contained in:
Samuel Holland 2021-10-08 00:17:23 -05:00 committed by Andre Przywara
parent d3b02987cb
commit 8b0eacdf2b
2 changed files with 21 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/mach-sunxi/Kconfig
View File

@ -96,6 +96,8 @@ config SUN6I_PRCM
config AXP_PMIC_BUS
bool
select DM_PMIC if DM_I2C
select PMIC_AXP if DM_I2C
help
Select this PMIC bus access helpers for Sunxi platform PRCM or other
AXP family PMIC devices.

19
arch/arm/mach-sunxi/pmic_bus.c
View File

@ -10,9 +10,11 @@
#include <axp_pmic.h>
#include <common.h>
#include <dm.h>
#include <asm/arch/p2wi.h>
#include <asm/arch/rsb.h>
#include <i2c.h>
#include <power/pmic.h>
#include <asm/arch/pmic_bus.h>
#define AXP152_I2C_ADDR 0x30
@ -23,6 +25,9 @@
#define AXP221_CHIP_ADDR 0x68
#if CONFIG_IS_ENABLED(PMIC_AXP)
static struct udevice *pmic;
#else
static int pmic_i2c_address(void)
{
if (IS_ENABLED(CONFIG_AXP152_POWER))
@ -33,6 +38,7 @@ static int pmic_i2c_address(void)
/* Other AXP2xx and AXP8xx variants */
return AXP209_I2C_ADDR;
}
#endif
int pmic_bus_init(void)
{
@ -43,6 +49,10 @@ int pmic_bus_init(void)
if (!needs_init)
return 0;
#if CONFIG_IS_ENABLED(PMIC_AXP)
ret = uclass_get_device_by_driver(UCLASS_PMIC, DM_DRIVER_GET(axp_pmic),
&pmic);
#else
if (IS_ENABLED(CONFIG_SYS_I2C_SUN6I_P2WI)) {
p2wi_init();
ret = p2wi_change_to_p2wi_mode(AXP221_CHIP_ADDR,
@ -56,6 +66,7 @@ int pmic_bus_init(void)
ret = rsb_set_device_address(AXP_PMIC_PRI_DEVICE_ADDR,
AXP_PMIC_PRI_RUNTIME_ADDR);
}
#endif
needs_init = ret;
@ -64,22 +75,30 @@ int pmic_bus_init(void)
int pmic_bus_read(u8 reg, u8 *data)
{
#if CONFIG_IS_ENABLED(PMIC_AXP)
return pmic_read(pmic, reg, data, 1);
#else
if (IS_ENABLED(CONFIG_SYS_I2C_SUN6I_P2WI))
return p2wi_read(reg, data);
if (IS_ENABLED(CONFIG_SYS_I2C_SUN8I_RSB))
return rsb_read(AXP_PMIC_PRI_RUNTIME_ADDR, reg, data);
return i2c_read(pmic_i2c_address(), reg, 1, data, 1);
#endif
}
int pmic_bus_write(u8 reg, u8 data)
{
#if CONFIG_IS_ENABLED(PMIC_AXP)
return pmic_write(pmic, reg, &data, 1);
#else
if (IS_ENABLED(CONFIG_SYS_I2C_SUN6I_P2WI))
return p2wi_write(reg, data);
if (IS_ENABLED(CONFIG_SYS_I2C_SUN8I_RSB))
return rsb_write(AXP_PMIC_PRI_RUNTIME_ADDR, reg, data);
return i2c_write(pmic_i2c_address(), reg, 1, &data, 1);
#endif
}
int pmic_bus_setbits(u8 reg, u8 bits)