Commit d836cb5f authored by Faiz Abbas's avatar Faiz Abbas Committed by Marc Kleine-Budde
Browse files

can: m_can: Add support for transceiver as phy 

Add support for implementing transceiver node as phy. The max_bitrate
is obtained by getting a phy attribute.

Link: https://lore.kernel.org/r/20210724174001.553047-1-mkl@pengutronix.de


Signed-off-by: default avatarFaiz Abbas <faiz_abbas@ti.com>
Signed-off-by: default avatarAswath Govindraju <a-govindraju@ti.com>
Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent 9c0e7ccd

drivers/net/can/m_can/m_can.c

+10 −1
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <linux/iopoll.h>

#include <linux/can/dev.h>

#include <linux/pinctrl/consumer.h>

#include <linux/phy/phy.h>



#include "m_can.h"
@@ -1521,6 +1522,8 @@ static int m_can_close(struct net_device *dev) 
	close_candev(dev);

	can_led_event(dev, CAN_LED_EVENT_STOP);



	phy_power_off(cdev->transceiver);



	return 0;

}
@@ -1706,10 +1709,14 @@ static int m_can_open(struct net_device *dev) 
	struct m_can_classdev *cdev = netdev_priv(dev);

	int err;



	err = m_can_clk_start(cdev);

	err = phy_power_on(cdev->transceiver);

	if (err)

		return err;



	err = m_can_clk_start(cdev);

	if (err)

		goto out_phy_power_off;



	/* open the can device */

	err = open_candev(dev);

	if (err) {
@@ -1766,6 +1773,8 @@ static int m_can_open(struct net_device *dev) 
	close_candev(dev);

exit_disable_clks:

	m_can_clk_stop(cdev);

out_phy_power_off:

	phy_power_off(cdev->transceiver);

	return err;

}

drivers/net/can/m_can/m_can.h

+2 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#include <linux/iopoll.h>

#include <linux/can/dev.h>

#include <linux/pinctrl/consumer.h>

#include <linux/phy/phy.h>



/* m_can lec values */

enum m_can_lec_type {
@@ -82,6 +83,7 @@ struct m_can_classdev { 
	struct workqueue_struct *tx_wq;

	struct work_struct tx_work;

	struct sk_buff *tx_skb;

	struct phy *transceiver;



	struct can_bittiming_const *bit_timing;

	struct can_bittiming_const *data_timing;

drivers/net/can/m_can/m_can_platform.c

+13 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 
// Copyright (C) 2018-19 Texas Instruments Incorporated - http://www.ti.com/



#include <linux/platform_device.h>

#include <linux/phy/phy.h>



#include "m_can.h"
@@ -67,6 +68,7 @@ static int m_can_plat_probe(struct platform_device *pdev) 
	struct resource *res;

	void __iomem *addr;

	void __iomem *mram_addr;

	struct phy *transceiver;

	int irq, ret = 0;



	mcan_class = m_can_class_allocate_dev(&pdev->dev,
@@ -101,6 +103,16 @@ static int m_can_plat_probe(struct platform_device *pdev) 
		goto probe_fail;

	}



	transceiver = devm_phy_optional_get(&pdev->dev, NULL);

	if (IS_ERR(transceiver)) {

		ret = PTR_ERR(transceiver);

		dev_err_probe(&pdev->dev, ret, "failed to get phy\n");

		goto probe_fail;

	}



	if (transceiver)

		mcan_class->can.bitrate_max = transceiver->attrs.max_link_rate;



	priv->base = addr;

	priv->mram_base = mram_addr;
@@ -108,6 +120,7 @@ static int m_can_plat_probe(struct platform_device *pdev) 
	mcan_class->pm_clock_support = 1;

	mcan_class->can.clock.freq = clk_get_rate(mcan_class->cclk);

	mcan_class->dev = &pdev->dev;

	mcan_class->transceiver = transceiver;



	mcan_class->ops = &m_can_plat_ops;