netdev - [PATCH] net: stmmac: socfpga: re-use the `interface` parameter from platform data

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Date:   Fri, 6 Sep 2019 15:30:54 +0300
From:   Alexandru Ardelean <alexandru.ardelean@...log.com>
To:     <netdev@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <peppe.cavallaro@...com>, <alexandre.torgue@...com>,
        <joabreu@...opsys.com>, <mcoquelin.stm32@...il.com>,
        <davem@...emloft.net>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>
Subject: [PATCH] net: stmmac: socfpga: re-use the `interface` parameter from platform data

The socfpga sub-driver defines an `interface` field in the `socfpga_dwmac`
struct and parses it on init.

The shared `stmmac_probe_config_dt()` function also parses this from the
device-tree and makes it available on the returned `plat_data` (which is
the same data available via `netdev_priv()`).

All that's needed now is to dig that information out, via some
`dev_get_drvdata()` && `netdev_priv()` calls and re-use it.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
---
 .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c   | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
index c141fe783e87..3094bb1f77e5 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
@@ -46,7 +46,6 @@ struct socfpga_dwmac_ops {
 };
 
 struct socfpga_dwmac {
-	int	interface;
 	u32	reg_offset;
 	u32	reg_shift;
 	struct	device *dev;
@@ -110,8 +109,6 @@ static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *
 	struct resource res_tse_pcs;
 	struct resource res_sgmii_adapter;
 
-	dwmac->interface = of_get_phy_mode(np);
-
 	sys_mgr_base_addr =
 		altr_sysmgr_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon");
 	if (IS_ERR(sys_mgr_base_addr)) {
@@ -231,8 +228,12 @@ static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *
 	return ret;
 }
 
-static int socfpga_set_phy_mode_common(int phymode, u32 *val)
+static int socfpga_set_phy_mode_common(struct socfpga_dwmac *dwmac, u32 *val)
 {
+	struct net_device *ndev = dev_get_drvdata(dwmac->dev);
+	struct stmmac_priv *priv = netdev_priv(ndev);
+	int phymode = priv->plat->interface;
+
 	switch (phymode) {
 	case PHY_INTERFACE_MODE_RGMII:
 	case PHY_INTERFACE_MODE_RGMII_ID:
@@ -255,12 +256,11 @@ static int socfpga_set_phy_mode_common(int phymode, u32 *val)
 static int socfpga_gen5_set_phy_mode(struct socfpga_dwmac *dwmac)
 {
 	struct regmap *sys_mgr_base_addr = dwmac->sys_mgr_base_addr;
-	int phymode = dwmac->interface;
 	u32 reg_offset = dwmac->reg_offset;
 	u32 reg_shift = dwmac->reg_shift;
 	u32 ctrl, val, module;
 
-	if (socfpga_set_phy_mode_common(phymode, &val)) {
+	if (socfpga_set_phy_mode_common(dwmac, &val)) {
 		dev_err(dwmac->dev, "bad phy mode %d\n", phymode);
 		return -EINVAL;
 	}
@@ -314,12 +314,11 @@ static int socfpga_gen5_set_phy_mode(struct socfpga_dwmac *dwmac)
 static int socfpga_gen10_set_phy_mode(struct socfpga_dwmac *dwmac)
 {
 	struct regmap *sys_mgr_base_addr = dwmac->sys_mgr_base_addr;
-	int phymode = dwmac->interface;
 	u32 reg_offset = dwmac->reg_offset;
 	u32 reg_shift = dwmac->reg_shift;
 	u32 ctrl, val, module;
 
-	if (socfpga_set_phy_mode_common(phymode, &val))
+	if (socfpga_set_phy_mode_common(dwmac, &val))
 		return -EINVAL;
 
 	/* Overwrite val to GMII if splitter core is enabled. The phymode here
-- 
2.20.1