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Message-ID: <20201214091616.13545-22-Sergey.Semin@baikalelectronics.ru>
Date: Mon, 14 Dec 2020 12:16:11 +0300
From: Serge Semin <Sergey.Semin@...kalelectronics.ru>
To: Rob Herring <robh+dt@...nel.org>,
Giuseppe Cavallaro <peppe.cavallaro@...com>,
Alexandre Torgue <alexandre.torgue@...com>,
Jose Abreu <joabreu@...opsys.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Johan Hovold <johan@...nel.org>,
Maxime Ripard <mripard@...nel.org>,
Joao Pinto <jpinto@...opsys.com>,
Lars Persson <larper@...s.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>
CC: Serge Semin <Sergey.Semin@...kalelectronics.ru>,
Serge Semin <fancer.lancer@...il.com>,
Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
Vyacheslav Mitrofanov
<Vyacheslav.Mitrofanov@...kalelectronics.ru>,
<netdev@...r.kernel.org>,
<linux-stm32@...md-mailman.stormreply.com>,
<linux-arm-kernel@...ts.infradead.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 21/25] net: stmmac: dwc-qos: Discard Tx/Rx clocks request
Since the Tx/Rx clocks with the same names are now requested and
enabled/disabled in the STMMAC DT-based platform config method, there is
no need in duplicating the same procedures in the DWC QoS Eth sub-driver.
Discard it then, but make sure the denoted clocks have been specified
for the platform.
Note also the deprecated clock "phy_ref_clk" have been defined as the Tx
clock in the DWC QoS Eth bindings. Let's use a pointer to the Tx clock
defined in the platform data then instead of the unrelated pclk pointer.
Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
---
.../stmicro/stmmac/dwmac-dwc-qos-eth.c | 44 +++++--------------
1 file changed, 11 insertions(+), 33 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
index 57f957898b60..f53a78448988 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
@@ -31,8 +31,6 @@ struct tegra_eqos {
struct reset_control *rst;
struct clk *clk_master;
struct clk *clk_slave;
- struct clk *clk_tx;
- struct clk *clk_rx;
struct gpio_desc *reset;
};
@@ -155,7 +153,7 @@ static void *dwc_qos_probe(struct platform_device *pdev,
goto disable;
}
- plat_dat->pclk = clk;
+ plat_dat->tx_clk = clk;
return NULL;
@@ -175,8 +173,8 @@ static int dwc_qos_remove(struct platform_device *pdev)
* data so the stmmac_remove_config_dt() method wouldn't have disabled
* the clocks too.
*/
- clk_disable_unprepare(priv->plat->pclk);
- priv->plat->pclk = NULL;
+ clk_disable_unprepare(priv->plat->tx_clk);
+ priv->plat->tx_clk = NULL;
clk_disable_unprepare(priv->plat->stmmac_clk);
priv->plat->stmmac_clk = NULL;
@@ -197,6 +195,7 @@ static int dwc_qos_remove(struct platform_device *pdev)
static void tegra_eqos_fix_speed(void *priv, unsigned int speed)
{
struct tegra_eqos *eqos = priv;
+ struct stmmac_priv *sp = netdev_priv(dev_get_drvdata(eqos->dev));
unsigned long rate = 125000000;
bool needs_calibration = false;
u32 value;
@@ -262,7 +261,7 @@ static void tegra_eqos_fix_speed(void *priv, unsigned int speed)
writel(value, eqos->regs + AUTO_CAL_CONFIG);
}
- err = clk_set_rate(eqos->clk_tx, rate);
+ err = clk_set_rate(sp->plat->tx_clk, rate);
if (err < 0)
dev_err(eqos->dev, "failed to set TX rate: %d\n", err);
}
@@ -301,6 +300,11 @@ static void *tegra_eqos_probe(struct platform_device *pdev,
if (!is_of_node(dev->fwnode))
goto bypass_clk_reset_gpio;
+ if (!data->tx_clk || !data->rx_clk) {
+ err = -EINVAL;
+ goto error;
+ }
+
eqos->clk_master = devm_clk_get(&pdev->dev, "master_bus");
if (IS_ERR(eqos->clk_master)) {
err = PTR_ERR(eqos->clk_master);
@@ -323,30 +327,10 @@ static void *tegra_eqos_probe(struct platform_device *pdev,
data->stmmac_clk = eqos->clk_slave;
- eqos->clk_rx = devm_clk_get(&pdev->dev, "rx");
- if (IS_ERR(eqos->clk_rx)) {
- err = PTR_ERR(eqos->clk_rx);
- goto disable_slave;
- }
-
- err = clk_prepare_enable(eqos->clk_rx);
- if (err < 0)
- goto disable_slave;
-
- eqos->clk_tx = devm_clk_get(&pdev->dev, "tx");
- if (IS_ERR(eqos->clk_tx)) {
- err = PTR_ERR(eqos->clk_tx);
- goto disable_rx;
- }
-
- err = clk_prepare_enable(eqos->clk_tx);
- if (err < 0)
- goto disable_rx;
-
eqos->reset = devm_gpiod_get(&pdev->dev, "phy-reset", GPIOD_OUT_HIGH);
if (IS_ERR(eqos->reset)) {
err = PTR_ERR(eqos->reset);
- goto disable_tx;
+ goto disable_slave;
}
usleep_range(2000, 4000);
@@ -389,10 +373,6 @@ static void *tegra_eqos_probe(struct platform_device *pdev,
reset_control_assert(eqos->rst);
reset_phy:
gpiod_set_value(eqos->reset, 1);
-disable_tx:
- clk_disable_unprepare(eqos->clk_tx);
-disable_rx:
- clk_disable_unprepare(eqos->clk_rx);
disable_slave:
clk_disable_unprepare(eqos->clk_slave);
data->stmmac_clk = NULL;
@@ -410,8 +390,6 @@ static int tegra_eqos_remove(struct platform_device *pdev)
reset_control_assert(eqos->rst);
gpiod_set_value(eqos->reset, 1);
- clk_disable_unprepare(eqos->clk_tx);
- clk_disable_unprepare(eqos->clk_rx);
clk_disable_unprepare(eqos->clk_slave);
clk_disable_unprepare(eqos->clk_master);
--
2.29.2
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