@@ -158,6 +158,8 @@ config SPL_DM_PMIC_MP5416
config DM_PMIC_PCA9450
bool "Enable Driver Model for PMIC PCA9450"
+ select REGMAP
+ select SYSCON
help
This config enables implementation of driver-model pmic uclass features
for PMIC PCA9450. The driver implements read/write operations.
@@ -165,6 +167,8 @@ config DM_PMIC_PCA9450
config SPL_DM_PMIC_PCA9450
bool "Enable Driver Model for PMIC PCA9450"
depends on SPL_DM_PMIC
+ select SPL_REGMAP
+ select SPL_SYSCON
help
This config enables implementation of driver-model pmic uclass features
for PMIC PCA9450 in SPL. The driver implements read/write operations.
@@ -11,6 +11,8 @@
#include <i2c.h>
#include <linux/err.h>
#include <log.h>
+#include <regmap.h>
+#include <syscon.h>
#include <asm/global_data.h>
#include <asm-generic/gpio.h>
#include <power/pmic.h>
@@ -30,6 +32,7 @@ static const struct pmic_child_info pmic_children_info[] = {
};
struct pca9450_priv {
+ struct regmap *regmap;
struct gpio_desc *sd_vsel_gpio;
};
@@ -86,8 +89,20 @@ static int pca9450_bind(struct udevice *dev)
static int pca9450_probe(struct udevice *dev)
{
struct pca9450_priv *priv = dev_get_priv(dev);
+ unsigned int reset_ctrl;
int ret = 0;
+ priv->regmap = syscon_node_to_regmap(dev_ofnode(dev));
+
+ if (dev_read_bool(dev, "nxp,wdog_b-warm-reset"))
+ reset_ctrl = WDOG_B_CFG_WARM;
+ else
+ reset_ctrl = WDOG_B_CFG_COLD_LDO12;
+
+ /* Set reset behavior on assertion of WDOG_B signal */
+ ret = regmap_update_bits(priv->regmap, PCA9450_RESET_CTRL,
+ WDOG_B_CFG_MASK, reset_ctrl);
+
if (CONFIG_IS_ENABLED(DM_GPIO) && CONFIG_IS_ENABLED(DM_REGULATOR_PCA9450)) {
priv->sd_vsel_gpio = devm_gpiod_get_optional(dev, "sd-vsel",
GPIOD_IS_OUT |
@@ -67,4 +67,11 @@ enum {
#define PCA9450_LDO34_MASK 0x1f
#define PCA9450_LDO5_MASK 0x0f
+/* PCA9450_REG_RESET_CTRL bits */
+#define WDOG_B_CFG_MASK 0xC0
+#define WDOG_B_CFG_NONE 0x00
+#define WDOG_B_CFG_WARM 0x40
+#define WDOG_B_CFG_COLD_LDO12 0x80
+#define WDOG_B_CFG_COLD 0xC0
+
#endif
By default the PCA9450 doesn't handle the assertion of the WDOG_B signal, but this is required to guarantee that things like software resets triggered by the watchdog work reliably. This is a port of the same changes in the Linux kernel: f7684f5a048f ("regulator: pca9450: Enable system reset on WDOG_B assertion") 2364a64d0673 ("regulator: pca9450: Make warm reset on WDOG_B assertion") Cc: Frieder Schrempf <frieder.schrempf@kontron.de> Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com> --- drivers/power/pmic/Kconfig | 4 ++++ drivers/power/pmic/pca9450.c | 15 +++++++++++++++ include/power/pca9450.h | 7 +++++++ 3 files changed, 26 insertions(+)