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net: smc91x: Fix device tree based configuration so it's usable

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Commit 89ce376c6b (drivers/net: Use of_match_ptr() macro in smc91x.c)
added minimal device tree support to smc91x, but it's not working on
many platforms because of the lack of some key configuration bits.

Fix the issue by parsing the necessary configuration like the
smc911x driver is doing. As most smc91x users seem to use 16-bit
access, let's default to that if no reg-io-width is specified.

Cc: Nicolas Pitre <nico@fluxnic.net>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: netdev@vger.kernel.org
Cc: devicetree@vger.kernel.org
Acked-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tony Lindgren 2013-12-11 13:04:27 -08:00 committed by David S. Miller
parent 610438b744
commit 3f823c15d5
2 changed files with 39 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/devicetree/bindings/net/smsc-lan91c111.txt
View File

@ -8,3 +8,7 @@ Required properties:
Optional properties:
- phy-device : phandle to Ethernet phy
- local-mac-address : Ethernet mac address to use
- reg-io-width : Mask of sizes (in bytes) of the IO accesses that
are supported on the device. Valid value for SMSC LAN91c111 are
1, 2 or 4. If it's omitted or invalid, the size would be 2 meaning
16-bit access only.

45
drivers/net/ethernet/smsc/smc91x.c
View File

@ -82,6 +82,7 @@ static const char version[] =
#include <linux/mii.h>
#include <linux/workqueue.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
@ -2184,6 +2185,15 @@ static void smc_release_datacs(struct platform_device *pdev, struct net_device *
}
}
#if IS_BUILTIN(CONFIG_OF)
static const struct of_device_id smc91x_match[] = {
{ .compatible = "smsc,lan91c94", },
{ .compatible = "smsc,lan91c111", },
{},
};
MODULE_DEVICE_TABLE(of, smc91x_match);
#endif
/*
* smc_init(void)
* Input parameters:
@ -2198,6 +2208,7 @@ static void smc_release_datacs(struct platform_device *pdev, struct net_device *
static int smc_drv_probe(struct platform_device *pdev)
{
struct smc91x_platdata *pd = dev_get_platdata(&pdev->dev);
const struct of_device_id *match = NULL;
struct smc_local *lp;
struct net_device *ndev;
struct resource *res, *ires;
@ -2217,11 +2228,34 @@ static int smc_drv_probe(struct platform_device *pdev)
*/
lp = netdev_priv(ndev);
lp->cfg.flags = 0;
if (pd) {
memcpy(&lp->cfg, pd, sizeof(lp->cfg));
lp->io_shift = SMC91X_IO_SHIFT(lp->cfg.flags);
} else {
}
#if IS_BUILTIN(CONFIG_OF)
match = of_match_device(of_match_ptr(smc91x_match), &pdev->dev);
if (match) {
struct device_node *np = pdev->dev.of_node;
u32 val;
/* Combination of IO widths supported, default to 16-bit */
if (!of_property_read_u32(np, "reg-io-width", &val)) {
if (val & 1)
lp->cfg.flags |= SMC91X_USE_8BIT;
if ((val == 0) || (val & 2))
lp->cfg.flags |= SMC91X_USE_16BIT;
if (val & 4)
lp->cfg.flags |= SMC91X_USE_32BIT;
} else {
lp->cfg.flags |= SMC91X_USE_16BIT;
}
}
#endif
if (!pd && !match) {
lp->cfg.flags |= (SMC_CAN_USE_8BIT) ? SMC91X_USE_8BIT : 0;
lp->cfg.flags |= (SMC_CAN_USE_16BIT) ? SMC91X_USE_16BIT : 0;
lp->cfg.flags |= (SMC_CAN_USE_32BIT) ? SMC91X_USE_32BIT : 0;
@ -2370,15 +2404,6 @@ static int smc_drv_resume(struct device *dev)
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id smc91x_match[] = {
{ .compatible = "smsc,lan91c94", },
{ .compatible = "smsc,lan91c111", },
{},
};
MODULE_DEVICE_TABLE(of, smc91x_match);
#endif
static struct dev_pm_ops smc_drv_pm_ops = {
.suspend = smc_drv_suspend,
.resume = smc_drv_resume,