diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/firmware/psci.c | 4 | ||||
| -rw-r--r-- | drivers/sysreset/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/sysreset/Makefile | 1 | ||||
| -rw-r--r-- | drivers/sysreset/sysreset_qcom-psci.c | 45 |
4 files changed, 57 insertions, 0 deletions
diff --git a/drivers/firmware/psci.c b/drivers/firmware/psci.c index 2e3223e1c32..b6838a244d2 100644 --- a/drivers/firmware/psci.c +++ b/drivers/firmware/psci.c @@ -186,6 +186,10 @@ static int psci_bind(struct udevice *dev) NULL); if (ret) pr_debug("PSCI System Reset was not bound.\n"); + if (IS_ENABLED(CONFIG_SYSRESET_QCOM_PSCI) && + device_bind_driver(dev, "qcom_psci-sysreset", + "qcom_psci-sysreset", NULL)) + pr_debug("QCOM PSCI System Reset was not bound.\n"); } /* From PSCI v1.0 onward we can discover services through ARM_SMCCC_FEATURE */ diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig index f589ad15418..90f740f51d4 100644 --- a/drivers/sysreset/Kconfig +++ b/drivers/sysreset/Kconfig @@ -301,6 +301,13 @@ config SYSRESET_RAA215300 help Add support for the system reboot via the Renesas RAA215300 PMIC. +config SYSRESET_QCOM_PSCI + bool "Support reset to EDL for Qualcomm SoCs via PSCI" + depends on ARM_SMCCC + help + Add support for the reset to EDL (Emergency Download) on Qualcomm + SoCs via PSCI. + config SYSRESET_QCOM_PSHOLD bool "Support sysreset for Qualcomm SoCs via PSHOLD" help diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile index d18a5d52360..b5b99235b6e 100644 --- a/drivers/sysreset/Makefile +++ b/drivers/sysreset/Makefile @@ -30,6 +30,7 @@ obj-$(CONFIG_SYSRESET_RESETCTL) += sysreset_resetctl.o obj-$(CONFIG_$(PHASE_)SYSRESET_AT91) += sysreset_at91.o obj-$(CONFIG_$(PHASE_)SYSRESET_X86) += sysreset_x86.o obj-$(CONFIG_SYSRESET_RAA215300) += sysreset_raa215300.o +obj-$(CONFIG_SYSRESET_QCOM_PSCI) += sysreset_qcom-psci.o obj-$(CONFIG_SYSRESET_QCOM_PSHOLD) += sysreset_qcom-pshold.o obj-$(CONFIG_TARGET_XTFPGA) += sysreset_xtfpga.o obj-$(CONFIG_SYSRESET_QEMU_VIRT_CTRL) += sysreset_qemu_virt_ctrl.o diff --git a/drivers/sysreset/sysreset_qcom-psci.c b/drivers/sysreset/sysreset_qcom-psci.c new file mode 100644 index 00000000000..3627bbf5c82 --- /dev/null +++ b/drivers/sysreset/sysreset_qcom-psci.c @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2017 Masahiro Yamada <[email protected]> + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. + */ + +#include <dm.h> +#include <sysreset.h> +#include <asm/system.h> +#include <linux/errno.h> +#include <linux/psci.h> +#include <asm/psci.h> + +static int qcom_psci_sysreset_get_status(struct udevice *dev, char *buf, int size) +{ + return -EOPNOTSUPP; +} + +static int qcom_psci_sysreset_request_arg(struct udevice *dev, int argc, + char * const argv[]) +{ + if (!strncasecmp(argv[1], "-edl", 4)) { + /* Supported in qcs9100, qcs8300, sc7280, qcs615 */ + if (psci_features(ARM_PSCI_1_1_FN64_SYSTEM_RESET2) == + ARM_PSCI_RET_SUCCESS) { + psci_system_reset2(0, 1); + return -EINPROGRESS; + } + printf("PSCI SYSTEM_RESET2 not supported\n"); + } + + return -EPROTONOSUPPORT; +} + +static struct sysreset_ops qcom_psci_sysreset_ops = { + .request_arg = qcom_psci_sysreset_request_arg, + .get_status = qcom_psci_sysreset_get_status, +}; + +U_BOOT_DRIVER(qcom_psci_sysreset) = { + .name = "qcom_psci-sysreset", + .id = UCLASS_SYSRESET, + .ops = &qcom_psci_sysreset_ops, + .flags = DM_FLAG_PRE_RELOC, +}; |