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Message-ID: <1499346330-12166-1-git-send-email-richard.leitner@skidata.com>
Date: Thu, 6 Jul 2017 15:05:29 +0200
From: Richard Leitner <richard.leitner@...data.com>
To: <fugang.duan@....com>, <robh+dt@...nel.org>, <mark.rutland@....com>
CC: <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <dev@...l1n.net>,
Richard Leitner <richard.leitner@...data.com>
Subject: [PATCH 1/2] net: ethernet: freescale: simplify fec_reset_phy
The fec_reset_phy function allowed only one execution during probeing.
As a preparation for future patches move the dt parsing and gpio
allocation to the probe function. The parameters of the phy reset are
added to the fec_enet_private struct. As a result the fec_reset_phy
function may be called anytime after probe.
Signed-off-by: Richard Leitner <richard.leitner@...data.com>
---
drivers/net/ethernet/freescale/fec.h | 4 ++
drivers/net/ethernet/freescale/fec_main.c | 85 ++++++++++++++++---------------
2 files changed, 47 insertions(+), 42 deletions(-)
diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index 5ea740b..3da8084 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -534,6 +534,10 @@ struct fec_enet_private {
int pause_flag;
int wol_flag;
u32 quirks;
+ int phy_reset;
+ int phy_reset_duration;
+ int phy_reset_post_delay;
+ bool phy_reset_active_high;
struct napi_struct napi;
int csum_flags;
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index f7c8649..cbbf7b8 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -3188,62 +3188,36 @@ static int fec_enet_init(struct net_device *ndev)
}
#ifdef CONFIG_OF
-static int fec_reset_phy(struct platform_device *pdev)
+static int fec_reset_phy(struct net_device *ndev)
{
- int err, phy_reset;
- bool active_high = false;
- int msec = 1, phy_post_delay = 0;
- struct device_node *np = pdev->dev.of_node;
-
- if (!np)
- return 0;
-
- err = of_property_read_u32(np, "phy-reset-duration", &msec);
- /* A sane reset duration should not be longer than 1s */
- if (!err && msec > 1000)
- msec = 1;
+ struct fec_enet_private *fep = netdev_priv(ndev);
- phy_reset = of_get_named_gpio(np, "phy-reset-gpios", 0);
- if (phy_reset == -EPROBE_DEFER)
- return phy_reset;
- else if (!gpio_is_valid(phy_reset))
+ if (!fep->phy_reset)
return 0;
- err = of_property_read_u32(np, "phy-reset-post-delay", &phy_post_delay);
- /* valid reset duration should be less than 1s */
- if (!err && phy_post_delay > 1000)
- return -EINVAL;
-
- active_high = of_property_read_bool(np, "phy-reset-active-high");
+ gpio_set_value_cansleep(fep->phy_reset, fep->phy_reset_active_high);
- err = devm_gpio_request_one(&pdev->dev, phy_reset,
- active_high ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
- "phy-reset");
- if (err) {
- dev_err(&pdev->dev, "failed to get phy-reset-gpios: %d\n", err);
- return err;
- }
-
- if (msec > 20)
- msleep(msec);
+ if (fep->phy_reset_duration > 20)
+ msleep(fep->phy_reset_duration);
else
- usleep_range(msec * 1000, msec * 1000 + 1000);
+ usleep_range(fep->phy_reset_duration * 1000,
+ fep->phy_reset_duration * 1000 + 1000);
- gpio_set_value_cansleep(phy_reset, !active_high);
+ gpio_set_value_cansleep(fep->phy_reset, !fep->phy_reset_active_high);
- if (!phy_post_delay)
+ if (!fep->phy_reset_post_delay)
return 0;
- if (phy_post_delay > 20)
- msleep(phy_post_delay);
+ if (fep->phy_reset_post_delay > 20)
+ msleep(fep->phy_reset_post_delay);
else
- usleep_range(phy_post_delay * 1000,
- phy_post_delay * 1000 + 1000);
+ usleep_range(fep->phy_reset_post_delay * 1000,
+ fep->phy_reset_post_delay * 1000 + 1000);
return 0;
}
#else /* CONFIG_OF */
-static int fec_reset_phy(struct platform_device *pdev)
+static int fec_reset_phy(struct net_device *ndev)
{
/*
* In case of platform probe, the reset has been done
@@ -3361,6 +3335,33 @@ fec_probe(struct platform_device *pdev)
}
fep->phy_node = phy_node;
+ fep->phy_reset = of_get_named_gpio(np, "phy-reset-gpios", 0);
+ if (gpio_is_valid(fep->phy_reset)) {
+ ret = of_property_read_u32(np, "phy-reset-duration",
+ &fep->phy_reset_duration);
+ /* A sane reset duration should not be longer than 1s */
+ if (!ret && fep->phy_reset_post_delay > 1000)
+ fep->phy_reset_post_delay = 1;
+
+ ret = of_property_read_u32(np, "phy-reset-post-delay",
+ &fep->phy_reset_post_delay);
+ /* valid post reset delay should be less than 1s */
+ if (!ret && fep->phy_reset_post_delay > 1000)
+ fep->phy_reset_post_delay = 1;
+
+ fep->phy_reset_active_high = of_property_read_bool(np, "phy-reset-active-high");
+
+ ret = devm_gpio_request_one(&pdev->dev, fep->phy_reset,
+ fep->phy_reset_active_high ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
+ "phy-reset");
+ if (ret) {
+ dev_err(&pdev->dev, "failed to get phy-reset-gpios: %d\n", ret);
+ goto failed_phy;
+ }
+ } else {
+ fep->phy_reset = 0;
+ }
+
ret = of_get_phy_mode(pdev->dev.of_node);
if (ret < 0) {
pdata = dev_get_platdata(&pdev->dev);
@@ -3433,7 +3434,7 @@ fec_probe(struct platform_device *pdev)
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
- ret = fec_reset_phy(pdev);
+ ret = fec_reset_phy(ndev);
if (ret)
goto failed_reset;
--
2.1.4
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