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This limits such drivers, to define any predefined reboot-modes statically within the driver and creates a dependency on device-tree. Introduce a list for predefined modes in the reboot-mode framework and process the predefined reboot-modes along with the device-tree defined reboot-modes. Modify existing reboot-mode based drivers to initialize the predefined list-head as empty. This patch enables a reboot mode driver to define reboot-modes through a predefined static list, in addition to the device-tree based reboot-modes. Signed-off-by: Shivendra Pratap Reviewed-by: Sebastian Reichel --- drivers/power/reset/nvmem-reboot-mode.c | 1 + drivers/power/reset/qcom-pon.c | 1 + drivers/power/reset/reboot-mode.c | 28 ++++++++++++++++++++++------ drivers/power/reset/syscon-reboot-mode.c | 1 + include/linux/reboot-mode.h | 9 +++++++++ 5 files changed, 34 insertions(+), 6 deletions(-) diff --git a/drivers/power/reset/nvmem-reboot-mode.c b/drivers/power/reset/= nvmem-reboot-mode.c index bd05d660490c686b43134f82f1eadd7665403d20..83a8d80fd7d1ccb1b736aee5f2d= 675246a63b8f8 100644 --- a/drivers/power/reset/nvmem-reboot-mode.c +++ b/drivers/power/reset/nvmem-reboot-mode.c @@ -53,6 +53,7 @@ static int nvmem_reboot_mode_probe(struct platform_device= *pdev) =20 nvmem_rbm->reboot.dev =3D &pdev->dev; nvmem_rbm->reboot.write =3D nvmem_reboot_mode_write; + INIT_LIST_HEAD(&nvmem_rbm->reboot.predefined_modes); =20 nvmem_rbm->cell =3D devm_nvmem_cell_get(&pdev->dev, "reboot-mode"); if (IS_ERR(nvmem_rbm->cell)) { diff --git a/drivers/power/reset/qcom-pon.c b/drivers/power/reset/qcom-pon.c index 57b36e6186f80aff947fd7f5aae5ce280c65dc6b..9d0e3fc621a6173438c6da4cce3= 8394199451881 100644 --- a/drivers/power/reset/qcom-pon.c +++ b/drivers/power/reset/qcom-pon.c @@ -73,6 +73,7 @@ static int qcom_pon_probe(struct platform_device *pdev) pon->reboot_mode.dev =3D &pdev->dev; pon->reason_shift =3D reason_shift; pon->reboot_mode.write =3D qcom_pon_reboot_mode_write; + INIT_LIST_HEAD(&pon->reboot_mode.predefined_modes); error =3D devm_reboot_mode_register(&pdev->dev, &pon->reboot_mode); if (error) { dev_err(&pdev->dev, "can't register reboot mode\n"); diff --git a/drivers/power/reset/reboot-mode.c b/drivers/power/reset/reboot= -mode.c index f5ab6eab210bcd9670441a4d2a301d9efdf2f322..a0cd463cad42cc08c55a9d1cc11= 174b513995104 100644 --- a/drivers/power/reset/reboot-mode.c +++ b/drivers/power/reset/reboot-mode.c @@ -17,12 +17,6 @@ =20 #define PREFIX "mode-" =20 -struct mode_info { - const char *mode; - u64 magic; - struct list_head list; -}; - static u64 get_reboot_mode_magic(struct reboot_mode_driver *reboot, const = char *cmd) { const char *normal =3D "normal"; @@ -73,6 +67,7 @@ static int reboot_mode_notify(struct notifier_block *this, */ int reboot_mode_register(struct reboot_mode_driver *reboot) { + struct mode_info *info_predef; struct mode_info *info; struct property *prop; struct device_node *np =3D reboot->dev->of_node; @@ -82,6 +77,9 @@ int reboot_mode_register(struct reboot_mode_driver *reboo= t) =20 INIT_LIST_HEAD(&reboot->head); =20 + if (!np) + goto predefined_modes; + for_each_property_of_node(np, prop) { if (strncmp(prop->name, PREFIX, len)) continue; @@ -115,6 +113,24 @@ int reboot_mode_register(struct reboot_mode_driver *re= boot) list_add_tail(&info->list, &reboot->head); } =20 +predefined_modes: + list_for_each_entry(info_predef, &reboot->predefined_modes, list) { + info =3D kzalloc_obj(*info, GFP_KERNEL); + if (!info) { + ret =3D -ENOMEM; + goto error; + } + + info->mode =3D kstrdup_const(info_predef->mode, GFP_KERNEL); + if (!info->mode) { + ret =3D -ENOMEM; + goto error; + } + + info->magic =3D info_predef->magic; + list_add_tail(&info->list, &reboot->head); + } + reboot->reboot_notifier.notifier_call =3D reboot_mode_notify; register_reboot_notifier(&reboot->reboot_notifier); =20 diff --git a/drivers/power/reset/syscon-reboot-mode.c b/drivers/power/reset= /syscon-reboot-mode.c index 9f4b18c5e46f6a8bf197773ceceb80b250f57541..0218b71541a0cefe1534e306f95= 6ae51ea9ee870 100644 --- a/drivers/power/reset/syscon-reboot-mode.c +++ b/drivers/power/reset/syscon-reboot-mode.c @@ -48,6 +48,7 @@ static int syscon_reboot_mode_probe(struct platform_devic= e *pdev) syscon_rbm->reboot.dev =3D &pdev->dev; syscon_rbm->reboot.write =3D syscon_reboot_mode_write; syscon_rbm->mask =3D 0xffffffff; + INIT_LIST_HEAD(&syscon_rbm->reboot.predefined_modes); =20 syscon_rbm->map =3D syscon_node_to_regmap(pdev->dev.parent->of_node); if (IS_ERR(syscon_rbm->map)) diff --git a/include/linux/reboot-mode.h b/include/linux/reboot-mode.h index 2ce189fdfff4b396d7cc6f175b30016781ae4fe9..f07696f9439063a04fc180e9531= 14ea09475805c 100644 --- a/include/linux/reboot-mode.h +++ b/include/linux/reboot-mode.h @@ -4,6 +4,7 @@ =20 #include #include +#include #include =20 /* Construct 64-bit reboot magic: arg2 in upper 32 bits, arg1 in lower 32 = */ @@ -15,9 +16,17 @@ /* Get 32 bit arg2 from 64 bit magic */ #define REBOOT_MODE_ARG2(magic) FIELD_GET(GENMASK_ULL(63, 32), magic) =20 +struct mode_info { + const char *mode; + u64 magic; + struct list_head list; +}; + struct reboot_mode_driver { struct device *dev; struct list_head head; + /* List of predefined reboot-modes, a reboot-mode-driver may populate. */ + struct list_head predefined_modes; int (*write)(struct reboot_mode_driver *reboot, u64 magic); struct notifier_block reboot_notifier; }; --=20 2.34.1