From: Michal Simek Date: Tue, 30 Nov 2021 15:32:43 +0000 (+0100) Subject: power: zynqmp: Add power domain driver for ZynqMP X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=186b68590bf7a947f7334d34b3e57f016c8ee384;p=thirdparty%2Fu-boot.git power: zynqmp: Add power domain driver for ZynqMP Driver should be enabled by CONFIG_POWER_DOMAIN=y and CONFIG_ZYNQMP_POWER_DOMAIN=y. Power domain driver doesn't have own DT node but it uses zynqmp firmware DT node that's why there is a need to bind driver when firmware node is found. Driver itself is simple. It is sending pmufw config object overlay for enabling access to device which is done in ...domain_request(). In ...domain_on() capabilities are passed and node is requested. This should be bare minimum of required to get power domain driver working. Signed-off-by: Michal Simek --- diff --git a/MAINTAINERS b/MAINTAINERS index 506b141137e..26146cd91bd 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -613,6 +613,7 @@ F: drivers/mmc/zynq_sdhci.c F: drivers/mtd/nand/raw/zynq_nand.c F: drivers/net/phy/xilinx_phy.c F: drivers/net/zynq_gem.c +F: drivers/power/domain/zynqmp-power-domain.c F: drivers/serial/serial_zynq.c F: drivers/reset/reset-zynqmp.c F: drivers/rtc/zynqmp_rtc.c diff --git a/drivers/firmware/firmware-zynqmp.c b/drivers/firmware/firmware-zynqmp.c index a01f5ff71b9..ec2ab6f2b10 100644 --- a/drivers/firmware/firmware-zynqmp.c +++ b/drivers/firmware/firmware-zynqmp.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -270,8 +271,25 @@ static const struct udevice_id zynqmp_firmware_ids[] = { { } }; +static int zynqmp_firmware_bind(struct udevice *dev) +{ + int ret; + struct udevice *child; + + if (IS_ENABLED(CONFIG_ZYNQMP_POWER_DOMAIN)) { + ret = device_bind_driver_to_node(dev, "zynqmp_power_domain", + "zynqmp_power_domain", + dev_ofnode(dev), &child); + if (ret) + printf("zynqmp power domain driver is not binded\n"); + } + + return 0; +} + U_BOOT_DRIVER(zynqmp_firmware) = { .id = UCLASS_FIRMWARE, .name = "zynqmp_firmware", .of_match = zynqmp_firmware_ids, + .bind = zynqmp_firmware_bind, }; diff --git a/drivers/power/domain/Kconfig b/drivers/power/domain/Kconfig index 99b3f9ae71b..40db9e14cbd 100644 --- a/drivers/power/domain/Kconfig +++ b/drivers/power/domain/Kconfig @@ -79,4 +79,13 @@ config TI_POWER_DOMAIN help Generic power domain implementation for TI K3 devices. +config ZYNQMP_POWER_DOMAIN + bool "Enable the Xilinx ZynqMP Power domain driver" + depends on POWER_DOMAIN && ZYNQMP_FIRMWARE + help + Generic power domain implementation for Xilinx ZynqMP devices. + The driver should be enabled when system starts in very minimal + configuration and it is extended at run time. Then enabling + the driver will ensure that PMUFW enable access to requested IP. + endmenu diff --git a/drivers/power/domain/Makefile b/drivers/power/domain/Makefile index 3d1e5f073cb..767678ae07a 100644 --- a/drivers/power/domain/Makefile +++ b/drivers/power/domain/Makefile @@ -15,3 +15,4 @@ obj-$(CONFIG_SANDBOX_POWER_DOMAIN) += sandbox-power-domain-test.o obj-$(CONFIG_TEGRA186_POWER_DOMAIN) += tegra186-power-domain.o obj-$(CONFIG_TI_SCI_POWER_DOMAIN) += ti-sci-power-domain.o obj-$(CONFIG_TI_POWER_DOMAIN) += ti-power-domain.o +obj-$(CONFIG_ZYNQMP_POWER_DOMAIN) += zynqmp-power-domain.o diff --git a/drivers/power/domain/zynqmp-power-domain.c b/drivers/power/domain/zynqmp-power-domain.c new file mode 100644 index 00000000000..6943658be42 --- /dev/null +++ b/drivers/power/domain/zynqmp-power-domain.c @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2021, Xilinx. Inc. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +static int zynqmp_pm_request_node(const u32 node, const u32 capabilities, + const u32 qos, const enum zynqmp_pm_request_ack ack) +{ + return xilinx_pm_request(PM_REQUEST_NODE, node, capabilities, + qos, ack, NULL); +} + +static int zynqmp_power_domain_request(struct power_domain *power_domain) +{ + dev_dbg(power_domain->dev, "Request for id: %ld\n", power_domain->id); + + return zynqmp_pmufw_node(power_domain->id); +} + +static int zynqmp_power_domain_free(struct power_domain *power_domain) +{ + /* nop now */ + return 0; +} + +static int zynqmp_power_domain_on(struct power_domain *power_domain) +{ + dev_dbg(power_domain->dev, "Domain ON for id: %ld\n", power_domain->id); + + return zynqmp_pm_request_node(power_domain->id, + ZYNQMP_PM_CAPABILITY_ACCESS, + ZYNQMP_PM_MAX_QOS, + ZYNQMP_PM_REQUEST_ACK_BLOCKING); +} + +static int zynqmp_power_domain_off(struct power_domain *power_domain) +{ + /* nop now */ + return 0; +} + +struct power_domain_ops zynqmp_power_domain_ops = { + .request = zynqmp_power_domain_request, + .rfree = zynqmp_power_domain_free, + .on = zynqmp_power_domain_on, + .off = zynqmp_power_domain_off, +}; + +static int zynqmp_power_domain_probe(struct udevice *dev) +{ + return 0; +} + +U_BOOT_DRIVER(zynqmp_power_domain) = { + .name = "zynqmp_power_domain", + .id = UCLASS_POWER_DOMAIN, + .probe = zynqmp_power_domain_probe, + .ops = &zynqmp_power_domain_ops, +}; diff --git a/include/zynqmp_firmware.h b/include/zynqmp_firmware.h index 6d246019c4b..07c8bed2105 100644 --- a/include/zynqmp_firmware.h +++ b/include/zynqmp_firmware.h @@ -450,4 +450,12 @@ int xilinx_pm_request(u32 api_id, u32 arg0, u32 arg1, u32 arg2, #define PM_CONFIG_IPI_PSU_CORTEXR5_0_MASK 0x00000100 #define PM_CONFIG_IPI_PSU_CORTEXR5_1_MASK 0x00000200 +/* Node capabilities */ +#define ZYNQMP_PM_CAPABILITY_ACCESS 0x1U +#define ZYNQMP_PM_CAPABILITY_CONTEXT 0x2U +#define ZYNQMP_PM_CAPABILITY_WAKEUP 0x4U +#define ZYNQMP_PM_CAPABILITY_UNUSABLE 0x8U + +#define ZYNQMP_PM_MAX_QOS 100U + #endif /* _ZYNQMP_FIRMWARE_H_ */