This pmic device is present on the SiFive Unmatched board and this new driver adds the possibility to reset it.
Signed-off-by: Alexandre Ghiti alexandre.ghiti@canonical.com --- configs/sifive_unmatched_defconfig | 2 ++ drivers/power/pmic/da9063.c | 49 ++++++++++++++++++++++++++++++ 2 files changed, 51 insertions(+)
diff --git a/configs/sifive_unmatched_defconfig b/configs/sifive_unmatched_defconfig index 978818b688..9ab058be39 100644 --- a/configs/sifive_unmatched_defconfig +++ b/configs/sifive_unmatched_defconfig @@ -43,3 +43,5 @@ CONFIG_DM_USB=y CONFIG_USB_XHCI_HCD=y CONFIG_USB_XHCI_PCI=y CONFIG_BOARD_EARLY_INIT_F=y +CONFIG_DM_PMIC=y +CONFIG_DM_PMIC_DA9063=y diff --git a/drivers/power/pmic/da9063.c b/drivers/power/pmic/da9063.c index 25101d18f7..b04879d9c5 100644 --- a/drivers/power/pmic/da9063.c +++ b/drivers/power/pmic/da9063.c @@ -10,6 +10,7 @@ #include <dm.h> #include <i2c.h> #include <log.h> +#include <dm/lists.h> #include <power/pmic.h> #include <power/regulator.h> #include <power/da9063_pmic.h> @@ -87,6 +88,7 @@ static int da9063_bind(struct udevice *dev) { ofnode regulators_node; int children; + int ret;
regulators_node = dev_read_subnode(dev, "regulators"); if (!ofnode_valid(regulators_node)) { @@ -101,6 +103,14 @@ static int da9063_bind(struct udevice *dev) if (!children) debug("%s: %s - no child found\n", __func__, dev->name);
+ if (CONFIG_IS_ENABLED(SYSRESET)) { + ret = device_bind_driver(dev, "da9063-sysreset", + "da9063-sysreset", NULL); + if (ret) + debug("%s: %s - failed to bind sysreset driver\n", + __func__, dev->name); + } + /* Always return success for this device */ return 0; } @@ -129,3 +139,42 @@ U_BOOT_DRIVER(pmic_da9063) = { .probe = da9063_probe, .ops = &da9063_ops, }; + +#ifdef CONFIG_SYSRESET +#include <sysreset.h> + +static int da9063_sysreset_request(struct udevice *dev, enum sysreset_t type) +{ + struct udevice *pmic_dev = dev->parent; + uint ret; + + if (type != SYSRESET_WARM && type != SYSRESET_COLD) + return -EPROTONOSUPPORT; + + ret = pmic_reg_write(pmic_dev, DA9063_REG_PAGE_CON, 0x00); + if (ret < 0) + return ret; + + /* Sets the WAKE_UP bit */ + ret = pmic_reg_write(pmic_dev, DA9063_REG_CONTROL_F, 0x04); + if (ret < 0) + return ret; + + /* Powerdown! */ + ret = pmic_reg_write(pmic_dev, DA9063_REG_CONTROL_A, 0x68); + if (ret < 0) + return ret; + + return -EINPROGRESS; +} + +static struct sysreset_ops da9063_sysreset_ops = { + .request = da9063_sysreset_request, +}; + +U_BOOT_DRIVER(da9063_sysreset) = { + .name = "da9063-sysreset", + .id = UCLASS_SYSRESET, + .ops = &da9063_sysreset_ops, +}; +#endif