brain-hackers_pepepper-mirror/u-boot-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/u-boot-brain synced 2024-06-09 23:36:03 +09:00
Code Issues Projects Releases Wiki Activity

regulator: pbias: Handle extended drain IO when changing omap36 PBIAS

Browse Source 
The OMAP36 and DM37 TRM state to disable extneded drain IO before
changing the PBIAS.  This patch does this before pmic writes if
the CONFIG_MMC_OMAP36XX_PINS flag is set and the cpu family is
omap36xx

Signed-off-by: Adam Ford <aford173@gmail.com>
This commit is contained in:
Adam Ford 2019-01-24 14:33:36 -06:00 committed by Tom Rini
parent 341e5a2752
commit 3c29a56736
1 changed files with 47 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/power/regulator/pbias_regulator.c
View File

@ -14,6 +14,11 @@
#include <linux/bitops.h>
#include <linux/ioport.h>
#include <dm/read.h>
#ifdef CONFIG_MMC_OMAP36XX_PINS
#include <asm/arch/sys_proto.h>
#include <asm/io.h>
#include <asm/arch/mux.h>
#endif
struct pbias_reg_info {
u32 enable;
@ -223,8 +228,11 @@ static int pbias_regulator_get_value(struct udevice *dev)
static int pbias_regulator_set_value(struct udevice *dev, int uV)
{
const struct pbias_reg_info *p = dev_get_priv(dev);
int rc;
int rc, ret;
u32 reg;
#ifdef CONFIG_MMC_OMAP36XX_PINS
u32 wkup_ctrl = readl(OMAP34XX_CTRL_WKUP_CTRL);
#endif
rc = pmic_read(dev->parent, 0, (uint8_t *)&reg, sizeof(reg));
if (rc)
@ -240,7 +248,23 @@ static int pbias_regulator_set_value(struct udevice *dev, int uV)
debug("Setting %s voltage to %s\n", p->name,
(reg & p->vmode) ? "3.0v" : "1.8v");
return pmic_write(dev->parent, 0, (uint8_t *)&reg, sizeof(reg));
#ifdef CONFIG_MMC_OMAP36XX_PINS
if (get_cpu_family() == CPU_OMAP36XX) {
/* Disable extended drain IO before changing PBIAS */
wkup_ctrl &= ~OMAP34XX_CTRL_WKUP_CTRL_GPIO_IO_PWRDNZ;
writel(wkup_ctrl, OMAP34XX_CTRL_WKUP_CTRL);
}
#endif
ret = pmic_write(dev->parent, 0, (uint8_t *)&reg, sizeof(reg));
#ifdef CONFIG_MMC_OMAP36XX_PINS
if (get_cpu_family() == CPU_OMAP36XX) {
/* Enable extended drain IO after changing PBIAS */
writel(wkup_ctrl |
OMAP34XX_CTRL_WKUP_CTRL_GPIO_IO_PWRDNZ,
OMAP34XX_CTRL_WKUP_CTRL);
}
#endif
return ret;
}
static int pbias_regulator_get_enable(struct udevice *dev)
@ -264,9 +288,20 @@ static int pbias_regulator_set_enable(struct udevice *dev, bool enable)
const struct pbias_reg_info *p = dev_get_priv(dev);
int rc;
u32 reg;
#ifdef CONFIG_MMC_OMAP36XX_PINS
u32 wkup_ctrl = readl(OMAP34XX_CTRL_WKUP_CTRL);
#endif
debug("Turning %s %s\n", enable ? "on" : "off", p->name);
#ifdef CONFIG_MMC_OMAP36XX_PINS
if (get_cpu_family() == CPU_OMAP36XX) {
/* Disable extended drain IO before changing PBIAS */
wkup_ctrl &= ~OMAP34XX_CTRL_WKUP_CTRL_GPIO_IO_PWRDNZ;
writel(wkup_ctrl, OMAP34XX_CTRL_WKUP_CTRL);
}
#endif
rc = pmic_read(dev->parent, 0, (uint8_t *)&reg, sizeof(reg));
if (rc)
return rc;
@ -278,6 +313,16 @@ static int pbias_regulator_set_enable(struct udevice *dev, bool enable)
reg |= p->disable_val;
rc = pmic_write(dev->parent, 0, (uint8_t *)&reg, sizeof(reg));
#ifdef CONFIG_MMC_OMAP36XX_PINS
if (get_cpu_family() == CPU_OMAP36XX) {
/* Enable extended drain IO after changing PBIAS */
writel(wkup_ctrl |
OMAP34XX_CTRL_WKUP_CTRL_GPIO_IO_PWRDNZ,
OMAP34XX_CTRL_WKUP_CTRL);
}
#endif
if (rc)
return rc;