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can: c_can: Add device tree support to Bosch C_CAN/D_CAN controller

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Add device tree support to C_CAN/D_CAN controller and usage details
are added to device tree documentation. Driver was tested on AM335x
EVM.

Signed-off-by: AnilKumar Ch <anilkumar@ti.com>
For the of binding doc:
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
AnilKumar Ch
2012-08-02 18:43:10 +05:30
committed by Marc Kleine-Budde
부모 f27b1db95d
커밋 2469627d17
2개의 변경된 파일과 87개의 추가작업 그리고 17개의 파일을 삭제
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55
drivers/net/can/c_can/c_can_platform.c
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@@ -30,6 +30,8 @@
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/can/dev.h>
@@ -65,17 +67,52 @@ static void c_can_plat_write_reg_aligned_to_32bit(struct c_can_priv *priv,
writew(val, priv->base + 2 * priv->regs[index]);
}
static struct platform_device_id c_can_id_table[] = {
[BOSCH_C_CAN_PLATFORM] = {
.name = KBUILD_MODNAME,
.driver_data = BOSCH_C_CAN,
},
[BOSCH_C_CAN] = {
.name = "c_can",
.driver_data = BOSCH_C_CAN,
},
[BOSCH_D_CAN] = {
.name = "d_can",
.driver_data = BOSCH_D_CAN,
}, {
}
};
static const struct of_device_id c_can_of_table[] = {
{ .compatible = "bosch,c_can", .data = &c_can_id_table[BOSCH_C_CAN] },
{ .compatible = "bosch,d_can", .data = &c_can_id_table[BOSCH_D_CAN] },
{ /* sentinel */ },
};
static int __devinit c_can_plat_probe(struct platform_device *pdev)
{
int ret;
void __iomem *addr;
struct net_device *dev;
struct c_can_priv *priv;
const struct of_device_id *match;
const struct platform_device_id *id;
struct resource *mem;
int irq;
struct clk *clk;
if (pdev->dev.of_node) {
match = of_match_device(c_can_of_table, &pdev->dev);
if (!match) {
dev_err(&pdev->dev, "Failed to find matching dt id\n");
ret = -EINVAL;
goto exit;
}
id = match->data;
} else {
id = platform_get_device_id(pdev);
}
/* get the appropriate clk */
clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(clk)) {
@@ -114,7 +151,6 @@ static int __devinit c_can_plat_probe(struct platform_device *pdev)
}
priv = netdev_priv(dev);
id = platform_get_device_id(pdev);
switch (id->driver_data) {
case BOSCH_C_CAN:
priv->regs = reg_map_c_can;
@@ -195,26 +231,11 @@ static int __devexit c_can_plat_remove(struct platform_device *pdev)
return 0;
}
static const struct platform_device_id c_can_id_table[] = {
[BOSCH_C_CAN_PLATFORM] = {
.name = KBUILD_MODNAME,
.driver_data = BOSCH_C_CAN,
},
[BOSCH_C_CAN] = {
.name = "c_can",
.driver_data = BOSCH_C_CAN,
},
[BOSCH_D_CAN] = {
.name = "d_can",
.driver_data = BOSCH_D_CAN,
}, {
}
};
static struct platform_driver c_can_plat_driver = {
.driver = {
.name = KBUILD_MODNAME,
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(c_can_of_table),
},
.probe = c_can_plat_probe,
.remove = __devexit_p(c_can_plat_remove),