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bcma: register bcma as device tree driver

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This driver is used by the bcm53xx ARM SoC code. Now it is possible to
give the address of the chipcommon core in device tree and bcma will
search for all the other cores.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Hauke Mehrtens
2014-09-26 00:09:19 +02:00
committed by John W. Linville
parent 7e174833de
commit 2101e533f4
5 changed files with 168 additions and 1 deletions
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52
drivers/bcma/main.c
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@@ -10,6 +10,7 @@
#include <linux/platform_device.h>
#include <linux/bcma/bcma.h>
#include <linux/slab.h>
#include <linux/of_address.h>
MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
MODULE_LICENSE("GPL");
@@ -131,6 +132,43 @@ static bool bcma_is_core_needed_early(u16 core_id)
return false;
}
#ifdef CONFIG_OF
static struct device_node *bcma_of_find_child_device(struct platform_device *parent,
struct bcma_device *core)
{
struct device_node *node;
u64 size;
const __be32 *reg;
if (!parent || !parent->dev.of_node)
return NULL;
for_each_child_of_node(parent->dev.of_node, node) {
reg = of_get_address(node, 0, &size, NULL);
if (!reg)
continue;
if (of_translate_address(node, reg) == core->addr)
return node;
}
return NULL;
}
static void bcma_of_fill_device(struct platform_device *parent,
struct bcma_device *core)
{
struct device_node *node;
node = bcma_of_find_child_device(parent, core);
if (node)
core->dev.of_node = node;
}
#else
static void bcma_of_fill_device(struct platform_device *parent,
struct bcma_device *core)
{
}
#endif /* CONFIG_OF */
static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
{
int err;
@@ -147,7 +185,13 @@ static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
break;
case BCMA_HOSTTYPE_SOC:
core->dev.dma_mask = &core->dev.coherent_dma_mask;
core->dma_dev = &core->dev;
if (bus->host_pdev) {
core->dma_dev = &bus->host_pdev->dev;
core->dev.parent = &bus->host_pdev->dev;
bcma_of_fill_device(bus->host_pdev, core);
} else {
core->dma_dev = &core->dev;
}
break;
case BCMA_HOSTTYPE_SDIO:
break;
@@ -528,6 +572,11 @@ static int __init bcma_modinit(void)
if (err)
return err;
err = bcma_host_soc_register_driver();
if (err) {
pr_err("SoC host initialization failed\n");
err = 0;
}
#ifdef CONFIG_BCMA_HOST_PCI
err = bcma_host_pci_init();
if (err) {
@@ -545,6 +594,7 @@ static void __exit bcma_modexit(void)
#ifdef CONFIG_BCMA_HOST_PCI
bcma_host_pci_exit();
#endif
bcma_host_soc_unregister_driver();
bus_unregister(&bcma_bus_type);
}
module_exit(bcma_modexit)