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Subject[PATCH v1 3/4] net: stmmac: dwmac-rk: Use standard devicetree property for phy regulator
Date
Currently, dwmac-rk uses a custom propety "phy_regulator" to get the name of the
right regulator to use to power on or power off the phy. This commit converts the
driver to use phy-supply devicetree property and the corresponding API, it cleans
the code a bit and make it simpler to maintain.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
---
drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 61 ++++++++------------------
1 file changed, 19 insertions(+), 42 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index 06e1637..8a8091c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -32,7 +32,7 @@
struct rk_priv_data {
struct platform_device *pdev;
int phy_iface;
- char regulator[32];
+ struct regulator *regulator;

bool clk_enabled;
bool clock_input;
@@ -287,46 +287,25 @@ static int gmac_clk_enable(struct rk_priv_data *bsp_priv, bool enable)

static int phy_power_on(struct rk_priv_data *bsp_priv, bool enable)
{
- struct regulator *ldo;
- char *ldostr = bsp_priv->regulator;
+ struct regulator *ldo = bsp_priv->regulator;
int ret;
struct device *dev = &bsp_priv->pdev->dev;

- if (!ldostr) {
- dev_err(dev, "%s: no ldo found\n", __func__);
+ if (!ldo) {
+ dev_err(dev, "%s: no regulator found\n", __func__);
return -1;
}

- ldo = regulator_get(NULL, ldostr);
- if (!ldo) {
- dev_err(dev, "\n%s get ldo %s failed\n", __func__, ldostr);
+ if (enable) {
+ ret = regulator_enable(ldo);
+ if (ret)
+ dev_err(dev, "%s: fail to enable phy-supply\n",
+ __func__);
} else {
- if (enable) {
- if (!regulator_is_enabled(ldo)) {
- ret = regulator_enable(ldo);
- if (ret != 0)
- dev_err(dev, "%s: fail to enable %s\n",
- __func__, ldostr);
- else
- dev_info(dev, "turn on ldo done.\n");
- } else {
- dev_warn(dev, "%s is enabled before enable",
- ldostr);
- }
- } else {
- if (regulator_is_enabled(ldo)) {
- ret = regulator_disable(ldo);
- if (ret != 0)
- dev_err(dev, "%s: fail to disable %s\n",
- __func__, ldostr);
- else
- dev_info(dev, "turn off ldo done.\n");
- } else {
- dev_warn(dev, "%s is disabled before disable",
- ldostr);
- }
- }
- regulator_put(ldo);
+ ret = regulator_disable(ldo);
+ if (ret)
+ dev_err(dev, "%s: fail to disable phy-supply\n",
+ __func__);
}

return 0;
@@ -346,14 +325,12 @@ static void *rk_gmac_setup(struct platform_device *pdev)

bsp_priv->phy_iface = of_get_phy_mode(dev->of_node);

- ret = of_property_read_string(dev->of_node, "phy_regulator", &strings);
- if (ret) {
- dev_warn(dev, "%s: Can not read property: phy_regulator.\n",
- __func__);
- } else {
- dev_info(dev, "%s: PHY power controlled by regulator(%s).\n",
- __func__, strings);
- strcpy(bsp_priv->regulator, strings);
+ bsp_priv->regulator = devm_regulator_get_optional(dev, "phy");
+ if (IS_ERR(bsp_priv->regulator)) {
+ if (PTR_ERR(bsp_priv->regulator) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_err(dev, "no regulator found\n");
+ bsp_priv->regulator = NULL;
}

ret = of_property_read_string(dev->of_node, "clock_in_out", &strings);
--
1.9.1


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