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113 lines
3.4 KiB
Diff
113 lines
3.4 KiB
Diff
From f4e7bad1fa582b3e9890bc0a2de7696c7df5b9b1 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
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Date: Fri, 26 Jun 2015 14:19:30 +0200
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Subject: [PATCH 111/171] mailbox: bcm2835: Support ARCH_BCM270x
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Make it possible to use bcm2835-mailbox without Device Tree.
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Load driver early because of lacking support for deferred probing
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in many drivers.
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Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
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---
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drivers/mailbox/Kconfig | 2 +-
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drivers/mailbox/bcm2835-mailbox.c | 18 ++++++++++++++++--
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drivers/mailbox/mailbox.c | 13 ++++++++++++-
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3 files changed, 29 insertions(+), 4 deletions(-)
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--- a/drivers/mailbox/Kconfig
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+++ b/drivers/mailbox/Kconfig
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@@ -69,7 +69,7 @@ config ALTERA_MBOX
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config BCM2835_MBOX
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tristate "BCM2835 Mailbox"
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- depends on ARCH_BCM2835
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+ depends on ARCH_BCM2835 || ARCH_BCM2708 || ARCH_BCM2709
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help
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An implementation of the BCM2385 Mailbox. It is used to invoke
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the services of the Videocore. Say Y here if you want to use the
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--- a/drivers/mailbox/bcm2835-mailbox.c
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+++ b/drivers/mailbox/bcm2835-mailbox.c
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@@ -51,12 +51,15 @@
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#define MAIL1_WRT (ARM_0_MAIL1 + 0x00)
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#define MAIL1_STA (ARM_0_MAIL1 + 0x18)
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+/* On ARCH_BCM270x these come through <linux/interrupt.h> (arm_control.h ) */
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+#ifndef ARM_MS_FULL
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/* Status register: FIFO state. */
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#define ARM_MS_FULL BIT(31)
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#define ARM_MS_EMPTY BIT(30)
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/* Configuration register: Enable interrupts. */
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#define ARM_MC_IHAVEDATAIRQEN BIT(0)
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+#endif
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struct bcm2835_mbox {
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void __iomem *regs;
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@@ -151,7 +154,7 @@ static int bcm2835_mbox_probe(struct pla
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return -ENOMEM;
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spin_lock_init(&mbox->lock);
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- ret = devm_request_irq(dev, irq_of_parse_and_map(dev->of_node, 0),
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+ ret = devm_request_irq(dev, platform_get_irq(pdev, 0),
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bcm2835_mbox_irq, 0, dev_name(dev), mbox);
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if (ret) {
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dev_err(dev, "Failed to register a mailbox IRQ handler: %d\n",
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@@ -210,7 +213,18 @@ static struct platform_driver bcm2835_mb
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.probe = bcm2835_mbox_probe,
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.remove = bcm2835_mbox_remove,
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};
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-module_platform_driver(bcm2835_mbox_driver);
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+
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+static int __init bcm2835_mbox_init(void)
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+{
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+ return platform_driver_register(&bcm2835_mbox_driver);
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+}
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+arch_initcall(bcm2835_mbox_init);
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+
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+static void __init bcm2835_mbox_exit(void)
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+{
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+ platform_driver_unregister(&bcm2835_mbox_driver);
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+}
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+module_exit(bcm2835_mbox_exit);
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MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>");
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MODULE_DESCRIPTION("BCM2835 mailbox IPC driver");
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--- a/drivers/mailbox/mailbox.c
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+++ b/drivers/mailbox/mailbox.c
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@@ -304,13 +304,23 @@ struct mbox_chan *mbox_request_channel(s
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unsigned long flags;
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int ret;
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- if (!dev || !dev->of_node) {
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+ if (!dev) {
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pr_debug("%s: No owner device node\n", __func__);
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return ERR_PTR(-ENODEV);
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}
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mutex_lock(&con_mutex);
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+ if (!dev->of_node) {
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+ chan = NULL;
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+ /* pick the first controller in the list */
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+ list_for_each_entry(mbox, &mbox_cons, node) {
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+ chan = &mbox->chans[0];
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+ break;
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+ }
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+ goto skip_dt;
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+ }
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+
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if (of_parse_phandle_with_args(dev->of_node, "mboxes",
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"#mbox-cells", index, &spec)) {
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dev_dbg(dev, "%s: can't parse \"mboxes\" property\n", __func__);
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@@ -327,6 +337,7 @@ struct mbox_chan *mbox_request_channel(s
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of_node_put(spec.np);
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+skip_dt:
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if (!chan || chan->cl || !try_module_get(mbox->dev->driver->owner)) {
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dev_dbg(dev, "%s: mailbox not free\n", __func__);
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mutex_unlock(&con_mutex);
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