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net: dsa: b53: mmap: Add device tree support 

Add device tree support to b53_mmap.c while keeping platform devices support.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Álvaro Fernández Rojas 2021-03-17 10:23:17 +01:00 committed by David S. Miller
parent 7b78702ed7
commit a5538a777b
1 changed files with 55 additions and 0 deletions
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55
drivers/net/dsa/b53/b53_mmap.c
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@ -16,6 +16,7 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <linux/bits.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/io.h>
@ -228,11 +229,65 @@ static const struct b53_io_ops b53_mmap_ops = {
.write64 = b53_mmap_write64,
};
static int b53_mmap_probe_of(struct platform_device *pdev,
struct b53_platform_data **ppdata)
{
struct device_node *np = pdev->dev.of_node;
struct device_node *of_ports, *of_port;
struct device *dev = &pdev->dev;
struct b53_platform_data *pdata;
void __iomem *mem;
mem = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(mem))
return PTR_ERR(mem);
pdata = devm_kzalloc(dev, sizeof(struct b53_platform_data),
GFP_KERNEL);
if (!pdata)
return -ENOMEM;
pdata->regs = mem;
pdata->chip_id = BCM63XX_DEVICE_ID;
pdata->big_endian = of_property_read_bool(np, "big-endian");
of_ports = of_get_child_by_name(np, "ports");
if (!of_ports) {
dev_err(dev, "no ports child node found\n");
return -EINVAL;
}
for_each_available_child_of_node(of_ports, of_port) {
u32 reg;
if (of_property_read_u32(of_port, "reg", &reg))
continue;
if (reg < B53_CPU_PORT)
pdata->enabled_ports |= BIT(reg);
}
of_node_put(of_ports);
*ppdata = pdata;
return 0;
}
static int b53_mmap_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct b53_platform_data *pdata = pdev->dev.platform_data;
struct b53_mmap_priv *priv;
struct b53_device *dev;
int ret;
if (!pdata && np) {
ret = b53_mmap_probe_of(pdev, &pdata);
if (ret) {
dev_err(&pdev->dev, "OF probe error\n");
return ret;
}
}
if (!pdata)
return -EINVAL;