Am 23.04.2017 um 10:43 schrieb Álvaro Fernández Rojas:
Add a new sysreset driver based on linux/drivers/power/reset/syscon-reboot.c, which provides a generic driver for platforms that only require writing a mask to a regmap offset.
Signed-off-by: Álvaro Fernández Rojas noltari@gmail.com Reviewed-by: Simon Glass sjg@chromium.org
v5: No chnages. v4: Rebased. v3: Introduce changes suggested by Simon Glass:
- Add missing driver description.
- Alphabetically order includes.
- Add priv struct to store regmap during probe.
- Cosmetic fixes.
v2: No changes.
drivers/sysreset/Kconfig | 8 ++++ drivers/sysreset/Makefile | 1 + drivers/sysreset/sysreset_syscon.c | 76 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 85 insertions(+) create mode 100644 drivers/sysreset/sysreset_syscon.c
diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig index 9664630..b2f7464 100644 --- a/drivers/sysreset/Kconfig +++ b/drivers/sysreset/Kconfig @@ -23,4 +23,12 @@ config SYSRESET_PSCI must be running on your system.
endif
+config SYSRESET_SYSCON
- bool "Enable support for mfd syscon reboot driver"
- select REGMAP
- select SYSCON
- help
Reboot support for generic SYSCON mapped register reset.endmenu diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile index 7bb8406..bd352e7 100644 --- a/drivers/sysreset/Makefile +++ b/drivers/sysreset/Makefile @@ -6,6 +6,7 @@
obj-$(CONFIG_SYSRESET) += sysreset-uclass.o obj-$(CONFIG_SYSRESET_PSCI) += sysreset_psci.o +obj-$(CONFIG_SYSRESET_SYSCON) += sysreset_syscon.o
ifndef CONFIG_SPL_BUILD obj-$(CONFIG_ROCKCHIP_RK3036) += sysreset_rk3036.o diff --git a/drivers/sysreset/sysreset_syscon.c b/drivers/sysreset/sysreset_syscon.c new file mode 100644 index 0000000..adfddb4 --- /dev/null +++ b/drivers/sysreset/sysreset_syscon.c @@ -0,0 +1,76 @@ +/*
- Copyright (C) 2017 Álvaro Fernández Rojas noltari@gmail.com
- Derived from linux/drivers/power/reset/syscon-reboot.c:
- Copyright (C) 2013, Applied Micro Circuits Corporation
- Author: Feng Kan fkan@apm.com
- SPDX-License-Identifier: GPL-2.0+
- */
+#include <common.h> +#include <dm.h> +#include <errno.h> +#include <regmap.h> +#include <sysreset.h> +#include <syscon.h>
+DECLARE_GLOBAL_DATA_PTR;
+struct syscon_reboot_priv {
- struct regmap *regmap;
- unsigned int offset;
- unsigned int mask;
+};
+static int syscon_reboot_request(struct udevice *dev, enum sysreset_t type) +{
- struct syscon_reboot_priv *priv = dev_get_priv(dev);
- regmap_write(priv->regmap, priv->offset, priv->mask);
- return -EINPROGRESS;
+}
+static struct sysreset_ops syscon_reboot_ops = {
- .request = syscon_reboot_request,
+};
+int syscon_reboot_probe(struct udevice *dev) +{
- struct udevice *syscon;
- struct syscon_reboot_priv *priv = dev_get_priv(dev);
- int err;
- err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
"regmap", &syscon);- if (err) {
error("unable to find syscon device\n");return err;- }
- priv->regmap = syscon_get_regmap(syscon);
- if (!priv->regmap) {
error("unable to find regmap\n");return -ENODEV;- }
- priv->offset = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(dev), "offset", 0);
- priv->mask = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(dev), "mask", 0);
checkpatch.pl: WARNING: line over 80 characters
- return 0;
+}
+static const struct udevice_id syscon_reboot_ids[] = {
- { .compatible = "syscon-reboot" },
- { /* sentinel */ }
+};
+U_BOOT_DRIVER(syscon_reboot) = {
- .name = "syscon_reboot",
- .id = UCLASS_SYSRESET,
- .of_match = syscon_reboot_ids,
- .probe = syscon_reboot_probe,
- .priv_auto_alloc_size = sizeof(struct syscon_reboot_priv),
- .ops = &syscon_reboot_ops,
+};