[PATCH 4.19 172/267] net: ethernet: fec: move GPR register offset and bit into DT

Greg Kroah-Hartman
2020-06-19T16:22:04Z

From: Fugang Duan <fugang.duan@nxp.com>

[ Upstream commit 8a448bf832af537d26aa557d183a16943dce4510 ]

The commit da722186f654 (net: fec: set GPR bit on suspend by DT
configuration) set the GPR reigster offset and bit in driver for
wake on lan feature.

But it introduces two issues here:
- one SOC has two instances, they have different bit
- different SOCs may have different offset and bit

So to support wake-on-lan feature on other i.MX platforms, it should
configure the GPR reigster offset and bit from DT.

So the patch is to improve the commit da722186f654 (net: fec: set GPR
bit on suspend by DT configuration) to support multiple ethernet
instances on i.MX series.

v2:
* switch back to store the quirks bitmask in driver_data
v3:
* suggested by Sascha Hauer, use a struct fec_devinfo for
abstracting differences between different hardware variants,
it can give more freedom to describe the differences.

Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/freescale/fec_main.c | 24 +++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 48c58f93b124..6702bc2dd92f 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -88,8 +88,6 @@ static void fec_enet_itr_coal_init(struct net_device *ndev);

struct fec_devinfo {
u32 quirks;
- u8 stop_gpr_reg;
- u8 stop_gpr_bit;
};

static const struct fec_devinfo fec_imx25_info = {
@@ -112,8 +110,6 @@ static const struct fec_devinfo fec_imx6q_info = {
FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
FEC_QUIRK_HAS_VLAN | FEC_QUIRK_ERR006358 |
FEC_QUIRK_HAS_RACC,
- .stop_gpr_reg = 0x34,
- .stop_gpr_bit = 27,
};

static const struct fec_devinfo fec_mvf600_info = {
@@ -3401,19 +3397,23 @@ static int fec_enet_get_irq_cnt(struct platform_device *pdev)
}

static int fec_enet_init_stop_mode(struct fec_enet_private *fep,
- struct fec_devinfo *dev_info,
struct device_node *np)
{
struct device_node *gpr_np;
+ u32 out_val[3];
int ret = 0;

- if (!dev_info)
- return 0;
-
- gpr_np = of_parse_phandle(np, "gpr", 0);
+ gpr_np = of_parse_phandle(np, "fsl,stop-mode", 0);
if (!gpr_np)
return 0;

+ ret = of_property_read_u32_array(np, "fsl,stop-mode", out_val,
+ ARRAY_SIZE(out_val));
+ if (ret) {
+ dev_dbg(&fep->pdev->dev, "no stop mode property\n");
+ return ret;
+ }
+
fep->stop_gpr.gpr = syscon_node_to_regmap(gpr_np);
if (IS_ERR(fep->stop_gpr.gpr)) {
dev_err(&fep->pdev->dev, "could not find gpr regmap\n");
@@ -3422,8 +3422,8 @@ static int fec_enet_init_stop_mode(struct fec_enet_private *fep,
goto out;
}

- fep->stop_gpr.reg = dev_info->stop_gpr_reg;
- fep->stop_gpr.bit = dev_info->stop_gpr_bit;
+ fep->stop_gpr.reg = out_val[1];
+ fep->stop_gpr.bit = out_val[2];

out:
of_node_put(gpr_np);
@@ -3501,7 +3501,7 @@ fec_probe(struct platform_device *pdev)
if (of_get_property(np, "fsl,magic-packet", NULL))
fep->wol_flag |= FEC_WOL_HAS_MAGIC_PACKET;

- ret = fec_enet_init_stop_mode(fep, dev_info, np);
+ ret = fec_enet_init_stop_mode(fep, np);
if (ret)
goto failed_stop_mode;

--
2.25.1