From c0e5a431442d7bbfbd3704212680e49faa8ee46c Mon Sep 17 00:00:00 2001 From: Andrew Davis Date: Tue, 26 Mar 2024 17:37:27 -0500 Subject: [PATCH 1/3] firmware: ti_sci: Use devm_register_restart_handler() Use device life-cycle managed register function to simplify probe. Signed-off-by: Andrew Davis Reviewed-by: Gabriel Somlo Reviewed-by: Markus Schneider-Pargmann Link: https://lore.kernel.org/r/20240326223730.54639-2-afd@ti.com Signed-off-by: Nishanth Menon --- drivers/firmware/ti_sci.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c index 8b9a2556de16..9885e1763591 100644 --- a/drivers/firmware/ti_sci.c +++ b/drivers/firmware/ti_sci.c @@ -87,7 +87,6 @@ struct ti_sci_desc { * struct ti_sci_info - Structure representing a TI SCI instance * @dev: Device pointer * @desc: SoC description for this instance - * @nb: Reboot Notifier block * @d: Debugfs file entry * @debug_region: Memory region where the debug message are available * @debug_region_size: Debug region size @@ -103,7 +102,6 @@ struct ti_sci_desc { */ struct ti_sci_info { struct device *dev; - struct notifier_block nb; const struct ti_sci_desc *desc; struct dentry *d; void __iomem *debug_region; @@ -122,7 +120,6 @@ struct ti_sci_info { #define cl_to_ti_sci_info(c) container_of(c, struct ti_sci_info, cl) #define handle_to_ti_sci_info(h) container_of(h, struct ti_sci_info, handle) -#define reboot_to_ti_sci_info(n) container_of(n, struct ti_sci_info, nb) #ifdef CONFIG_DEBUG_FS @@ -3254,10 +3251,9 @@ devm_ti_sci_get_resource(const struct ti_sci_handle *handle, struct device *dev, } EXPORT_SYMBOL_GPL(devm_ti_sci_get_resource); -static int tisci_reboot_handler(struct notifier_block *nb, unsigned long mode, - void *cmd) +static int tisci_reboot_handler(struct sys_off_data *data) { - struct ti_sci_info *info = reboot_to_ti_sci_info(nb); + struct ti_sci_info *info = data->cb_data; const struct ti_sci_handle *handle = &info->handle; ti_sci_cmd_core_reboot(handle); @@ -3400,10 +3396,9 @@ static int ti_sci_probe(struct platform_device *pdev) ti_sci_setup_ops(info); if (reboot) { - info->nb.notifier_call = tisci_reboot_handler; - info->nb.priority = 128; - - ret = register_restart_handler(&info->nb); + ret = devm_register_restart_handler(dev, + tisci_reboot_handler, + info); if (ret) { dev_err(dev, "reboot registration fail(%d)\n", ret); goto out; From 8c8ff39838e02b6df91b80e086426dcb9ac86908 Mon Sep 17 00:00:00 2001 From: Andrew Davis Date: Tue, 26 Mar 2024 17:37:28 -0500 Subject: [PATCH 2/3] firmware: ti_sci: Unconditionally register reset handler There was once a limitation that there could only be one system reset handler. Due to that we only would register this handler when a non-standard device tree property was found, else we left the default handler in place (usually PSCI). Now that we can have multiple handlers, and TI-SCI reset is always available in the firmware, register this handler unconditionally. This priority is left at the default so higher priority handlers (like PSCI) are still attempted first. Signed-off-by: Andrew Davis Reviewed-by: Markus Schneider-Pargmann Link: https://lore.kernel.org/r/20240326223730.54639-3-afd@ti.com Signed-off-by: Nishanth Menon --- drivers/firmware/ti_sci.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c index 9885e1763591..160968301b1f 100644 --- a/drivers/firmware/ti_sci.c +++ b/drivers/firmware/ti_sci.c @@ -3299,7 +3299,6 @@ static int ti_sci_probe(struct platform_device *pdev) struct mbox_client *cl; int ret = -EINVAL; int i; - int reboot = 0; u32 h_id; desc = device_get_match_data(dev); @@ -3323,8 +3322,6 @@ static int ti_sci_probe(struct platform_device *pdev) } } - reboot = of_property_read_bool(dev->of_node, - "ti,system-reboot-controller"); INIT_LIST_HEAD(&info->node); minfo = &info->minfo; @@ -3395,14 +3392,10 @@ static int ti_sci_probe(struct platform_device *pdev) ti_sci_setup_ops(info); - if (reboot) { - ret = devm_register_restart_handler(dev, - tisci_reboot_handler, - info); - if (ret) { - dev_err(dev, "reboot registration fail(%d)\n", ret); - goto out; - } + ret = devm_register_restart_handler(dev, tisci_reboot_handler, info); + if (ret) { + dev_err(dev, "reboot registration fail(%d)\n", ret); + goto out; } dev_info(dev, "ABI: %d.%d (firmware rev 0x%04x '%s')\n", From ddbf3204f600a4d1f153498f618369fca352ae00 Mon Sep 17 00:00:00 2001 From: Andrew Davis Date: Mon, 25 Mar 2024 11:55:07 -0500 Subject: [PATCH 3/3] soc: ti: wkup_m3_ipc: Send NULL dummy message instead of pointer message mbox_send_message() sends a u32 bit message, not a pointer to a message. We only convert to a pointer type as a generic type. If we want to send a dummy message of 0, then simply send 0 (NULL). Signed-off-by: Andrew Davis Link: https://lore.kernel.org/r/20240325165507.30323-1-afd@ti.com Signed-off-by: Nishanth Menon --- drivers/soc/ti/wkup_m3_ipc.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/soc/ti/wkup_m3_ipc.c b/drivers/soc/ti/wkup_m3_ipc.c index 6a1c6b34c414..88f774db9208 100644 --- a/drivers/soc/ti/wkup_m3_ipc.c +++ b/drivers/soc/ti/wkup_m3_ipc.c @@ -16,7 +16,6 @@ #include #include #include -#include #include #include #include @@ -314,7 +313,6 @@ static irqreturn_t wkup_m3_txev_handler(int irq, void *ipc_data) static int wkup_m3_ping(struct wkup_m3_ipc *m3_ipc) { struct device *dev = m3_ipc->dev; - mbox_msg_t dummy_msg = 0; int ret; if (!m3_ipc->mbox) { @@ -330,7 +328,7 @@ static int wkup_m3_ping(struct wkup_m3_ipc *m3_ipc) * the RX callback to avoid multiple interrupts being received * by the CM3. */ - ret = mbox_send_message(m3_ipc->mbox, &dummy_msg); + ret = mbox_send_message(m3_ipc->mbox, NULL); if (ret < 0) { dev_err(dev, "%s: mbox_send_message() failed: %d\n", __func__, ret); @@ -352,7 +350,6 @@ static int wkup_m3_ping(struct wkup_m3_ipc *m3_ipc) static int wkup_m3_ping_noirq(struct wkup_m3_ipc *m3_ipc) { struct device *dev = m3_ipc->dev; - mbox_msg_t dummy_msg = 0; int ret; if (!m3_ipc->mbox) { @@ -361,7 +358,7 @@ static int wkup_m3_ping_noirq(struct wkup_m3_ipc *m3_ipc) return -EIO; } - ret = mbox_send_message(m3_ipc->mbox, &dummy_msg); + ret = mbox_send_message(m3_ipc->mbox, NULL); if (ret < 0) { dev_err(dev, "%s: mbox_send_message() failed: %d\n", __func__, ret);