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From 996a87d316243001486fe36b36a7b6ffb4dd1b28 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
Date: Fri, 26 Jun 2015 14:25:01 +0200
Subject: [PATCH 047/423] firmware: bcm2835: Support ARCH_BCM270x
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Support booting without Device Tree.
Turn on USB power.
Load driver early because of lacking support for deferred probing
in many drivers.
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
---
drivers/firmware/raspberrypi.c | 41 +++++++++++++++++++++++++++++++++++++++--
1 file changed, 39 insertions(+), 2 deletions(-)
--- a/drivers/firmware/raspberrypi.c
+++ b/drivers/firmware/raspberrypi.c
@@ -28,6 +28,8 @@ struct rpi_firmware {
u32 enabled;
};
+static struct platform_device *g_pdev;
+
static DEFINE_MUTEX(transaction_lock);
static void response_callback(struct mbox_client *cl, void *msg)
@@ -183,6 +185,25 @@ rpi_firmware_print_firmware_revision(str
}
}
+static int raspberrypi_firmware_set_power(struct rpi_firmware *fw,
+ u32 domain, bool on)
+{
+ struct {
+ u32 domain;
+ u32 on;
+ } packet;
+ int ret;
+
+ packet.domain = domain;
+ packet.on = on;
+ ret = rpi_firmware_property(fw, RPI_FIRMWARE_SET_POWER_STATE,
+ &packet, sizeof(packet));
+ if (!ret && packet.on != on)
+ ret = -EINVAL;
+
+ return ret;
+}
+
static int rpi_firmware_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -207,9 +228,13 @@ static int rpi_firmware_probe(struct pla
init_completion(&fw->c);
platform_set_drvdata(pdev, fw);
+ g_pdev = pdev;
rpi_firmware_print_firmware_revision(fw);
+ if (raspberrypi_firmware_set_power(fw, 3, true))
+ dev_err(dev, "failed to turn on USB power\n");
+
return 0;
}
@@ -218,6 +243,7 @@ static int rpi_firmware_remove(struct pl
struct rpi_firmware *fw = platform_get_drvdata(pdev);
mbox_free_channel(fw->chan);
+ g_pdev = NULL;
return 0;
}
@@ -230,7 +256,7 @@ static int rpi_firmware_remove(struct pl
*/
struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node)
{
- struct platform_device *pdev = of_find_device_by_node(firmware_node);
+ struct platform_device *pdev = g_pdev;
if (!pdev)
return NULL;
@@ -253,7 +279,18 @@ static struct platform_driver rpi_firmwa
.probe = rpi_firmware_probe,
.remove = rpi_firmware_remove,
};
-module_platform_driver(rpi_firmware_driver);
+
+static int __init rpi_firmware_init(void)
+{
+ return platform_driver_register(&rpi_firmware_driver);
+}
+subsys_initcall(rpi_firmware_init);
+
+static void __init rpi_firmware_exit(void)
+{
+ platform_driver_unregister(&rpi_firmware_driver);
+}
+module_exit(rpi_firmware_exit);
MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
MODULE_DESCRIPTION("Raspberry Pi firmware driver");
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