From 36301913195582a2398add6d60477be534d4f603 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= Date: Fri, 26 Jun 2015 14:19:30 +0200 Subject: [PATCH 111/121] mailbox: bcm2835: Support ARCH_BCM270x MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Make it possible to use bcm2835-mailbox without Device Tree. Load driver early because of lacking support for deferred probing in many drivers. Signed-off-by: Noralf Trønnes --- drivers/mailbox/Kconfig | 2 +- drivers/mailbox/bcm2835-mailbox.c | 18 ++++++++++++++++-- drivers/mailbox/mailbox.c | 13 ++++++++++++- 3 files changed, 29 insertions(+), 4 deletions(-) --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -69,7 +69,7 @@ config ALTERA_MBOX config BCM2835_MBOX tristate "BCM2835 Mailbox" - depends on ARCH_BCM2835 + depends on ARCH_BCM2835 || ARCH_BCM2708 || ARCH_BCM2709 help An implementation of the BCM2385 Mailbox. It is used to invoke the services of the Videocore. Say Y here if you want to use the --- a/drivers/mailbox/bcm2835-mailbox.c +++ b/drivers/mailbox/bcm2835-mailbox.c @@ -51,12 +51,15 @@ #define MAIL1_WRT (ARM_0_MAIL1 + 0x00) #define MAIL1_STA (ARM_0_MAIL1 + 0x18) +/* On ARCH_BCM270x these come through (arm_control.h ) */ +#ifndef ARM_MS_FULL /* Status register: FIFO state. */ #define ARM_MS_FULL BIT(31) #define ARM_MS_EMPTY BIT(30) /* Configuration register: Enable interrupts. */ #define ARM_MC_IHAVEDATAIRQEN BIT(0) +#endif struct bcm2835_mbox { void __iomem *regs; @@ -151,7 +154,7 @@ static int bcm2835_mbox_probe(struct pla return -ENOMEM; spin_lock_init(&mbox->lock); - ret = devm_request_irq(dev, irq_of_parse_and_map(dev->of_node, 0), + ret = devm_request_irq(dev, platform_get_irq(pdev, 0), bcm2835_mbox_irq, 0, dev_name(dev), mbox); if (ret) { dev_err(dev, "Failed to register a mailbox IRQ handler: %d\n", @@ -210,7 +213,18 @@ static struct platform_driver bcm2835_mb .probe = bcm2835_mbox_probe, .remove = bcm2835_mbox_remove, }; -module_platform_driver(bcm2835_mbox_driver); + +static int __init bcm2835_mbox_init(void) +{ + return platform_driver_register(&bcm2835_mbox_driver); +} +arch_initcall(bcm2835_mbox_init); + +static void __init bcm2835_mbox_exit(void) +{ + platform_driver_unregister(&bcm2835_mbox_driver); +} +module_exit(bcm2835_mbox_exit); MODULE_AUTHOR("Lubomir Rintel "); MODULE_DESCRIPTION("BCM2835 mailbox IPC driver"); --- a/drivers/mailbox/mailbox.c +++ b/drivers/mailbox/mailbox.c @@ -304,13 +304,23 @@ struct mbox_chan *mbox_request_channel(s unsigned long flags; int ret; - if (!dev || !dev->of_node) { + if (!dev) { pr_debug("%s: No owner device node\n", __func__); return ERR_PTR(-ENODEV); } mutex_lock(&con_mutex); + if (!dev->of_node) { + chan = NULL; + /* pick the first controller in the list */ + list_for_each_entry(mbox, &mbox_cons, node) { + chan = &mbox->chans[0]; + break; + } + goto skip_dt; + } + if (of_parse_phandle_with_args(dev->of_node, "mboxes", "#mbox-cells", index, &spec)) { dev_dbg(dev, "%s: can't parse \"mboxes\" property\n", __func__); @@ -327,6 +337,7 @@ struct mbox_chan *mbox_request_channel(s of_node_put(spec.np); +skip_dt: if (!chan || chan->cl || !try_module_get(mbox->dev->driver->owner)) { dev_dbg(dev, "%s: mailbox not free\n", __func__); mutex_unlock(&con_mutex);