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net: micrel : ks8851-ml: add vdd-supply support

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Few platforms use external regulator to keep the ethernet MAC supplied.
So, request and enable the regulator for driver functionality.

Fixes: 66fda75f47 (regulator: core: Replace direct ops->disable usage)
Reported-by: Russell King <rmk+kernel@arm.linux.org.uk>
Suggested-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nishanth Menon 2014-03-21 01:52:48 -05:00 committed by David S. Miller
parent b74d3feccc
commit ebf4ad955d
2 changed files with 30 additions and 1 deletions
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1
Documentation/devicetree/bindings/net/micrel-ks8851.txt
View file

@ -7,3 +7,4 @@ Required properties:
Optional properties:
- local-mac-address : Ethernet mac address to use
- vdd-supply: supply for Ethernet mac

30
drivers/net/ethernet/micrel/ks8851.c
View file

@ -23,6 +23,7 @@
#include <linux/crc32.h>
#include <linux/mii.h>
#include <linux/eeprom_93cx6.h>
#include <linux/regulator/consumer.h>
#include <linux/spi/spi.h>
@ -83,6 +84,7 @@ union ks8851_tx_hdr {
* @rc_rxqcr: Cached copy of KS_RXQCR.
* @eeprom_size: Companion eeprom size in Bytes, 0 if no eeprom
* @eeprom: 93CX6 EEPROM state for accessing on-board EEPROM.
* @vdd_reg: Optional regulator supplying the chip
*
* The @lock ensures that the chip is protected when certain operations are
* in progress. When the read or write packet transfer is in progress, most
@ -130,6 +132,7 @@ struct ks8851_net {
struct spi_transfer spi_xfer2[2];
struct eeprom_93cx6 eeprom;
struct regulator *vdd_reg;
};
static int msg_enable;
@ -1414,6 +1417,21 @@ static int ks8851_probe(struct spi_device *spi)
ks->spidev = spi;
ks->tx_space = 6144;
ks->vdd_reg = regulator_get_optional(&spi->dev, "vdd");
if (IS_ERR(ks->vdd_reg)) {
ret = PTR_ERR(ks->vdd_reg);
if (ret == -EPROBE_DEFER)
goto err_reg;
} else {
ret = regulator_enable(ks->vdd_reg);
if (ret) {
dev_err(&spi->dev, "regulator enable fail: %d\n",
ret);
goto err_reg_en;
}
}
mutex_init(&ks->lock);
spin_lock_init(&ks->statelock);
@ -1508,8 +1526,14 @@ static int ks8851_probe(struct spi_device *spi)
err_netdev:
free_irq(ndev->irq, ks);
err_id:
err_irq:
err_id:
if (!IS_ERR(ks->vdd_reg))
regulator_disable(ks->vdd_reg);
err_reg_en:
if (!IS_ERR(ks->vdd_reg))
regulator_put(ks->vdd_reg);
err_reg:
free_netdev(ndev);
return ret;
}
@ -1523,6 +1547,10 @@ static int ks8851_remove(struct spi_device *spi)
unregister_netdev(priv->netdev);
free_irq(spi->irq, priv);
if (!IS_ERR(priv->vdd_reg)) {
regulator_disable(priv->vdd_reg);
regulator_put(priv->vdd_reg);
}
free_netdev(priv->netdev);
return 0;