From: Faiz Abbas <faiz_ab...@ti.com> Add support for implementing transceiver node as phy. The max_bitrate is obtained by getting a phy attribute.
Signed-off-by: Faiz Abbas <faiz_ab...@ti.com> Signed-off-by: Aswath Govindraju <a-govindr...@ti.com> --- drivers/net/can/m_can/m_can.c | 10 ++++++++++ drivers/net/can/m_can/m_can.h | 2 ++ drivers/net/can/m_can/m_can_platform.c | 13 +++++++++++++ 3 files changed, 25 insertions(+) diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 34073cd077e4..7d31250446c2 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -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" @@ -1514,6 +1515,7 @@ static void m_can_stop(struct net_device *dev) static int m_can_close(struct net_device *dev) { struct m_can_classdev *cdev = netdev_priv(dev); + int err; netif_stop_queue(dev); @@ -1536,6 +1538,10 @@ static int m_can_close(struct net_device *dev) close_candev(dev); can_led_event(dev, CAN_LED_EVENT_STOP); + err = phy_power_off(cdev->transceiver); + if (err) + return err; + return 0; } @@ -1720,6 +1726,10 @@ static int m_can_open(struct net_device *dev) struct m_can_classdev *cdev = netdev_priv(dev); int err; + err = phy_power_on(cdev->transceiver); + if (err) + return err; + err = m_can_clk_start(cdev); if (err) return err; diff --git a/drivers/net/can/m_can/m_can.h b/drivers/net/can/m_can/m_can.h index ace071c3e58c..38cad068abad 100644 --- a/drivers/net/can/m_can/m_can.h +++ b/drivers/net/can/m_can/m_can.h @@ -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; diff --git a/drivers/net/can/m_can/m_can_platform.c b/drivers/net/can/m_can/m_can_platform.c index 599de0e08cd7..82d4f1a15dd7 100644 --- a/drivers/net/can/m_can/m_can_platform.c +++ b/drivers/net/can/m_can/m_can_platform.c @@ -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(&pdev->dev, "error while getting phy, err=%d\n", ret); + return ret; + } + + if (transceiver) + priv->cdev.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; -- 2.17.1