From: Aswath Govindraju <a-govindraju@ti.com> To: unlisted-recipients:; (no To-header on input) Cc: Vignesh Raghavendra <vigneshr@ti.com>, Kishon Vijay Abraham I <kishon@ti.com>, Nishanth Menon <nm@ti.com>, Aswath Govindraju <a-govindraju@ti.com>, Wolfgang Grandegger <wg@grandegger.com>, Marc Kleine-Budde <mkl@pengutronix.de>, Vinod Koul <vkoul@kernel.org>, Rob Herring <robh+dt@kernel.org>, <linux-can@vger.kernel.org>, <linux-phy@lists.infradead.org>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org> Subject: [PATCH RFC 2/2] phy: phy-can-transceiver: Add support for setting mux Date: Thu, 11 Nov 2021 22:13:12 +0530 [thread overview] Message-ID: <20211111164313.649-3-a-govindraju@ti.com> (raw) In-Reply-To: <20211111164313.649-1-a-govindraju@ti.com> On some boards, for routing CAN signals from controller to transceiver, muxes might need to be set. Therefore, add support for setting the mux by reading the mux-controls property from the device tree node. Signed-off-by: Aswath Govindraju <a-govindraju@ti.com> --- drivers/phy/phy-can-transceiver.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/phy/phy-can-transceiver.c b/drivers/phy/phy-can-transceiver.c index 6f3fe37dee0e..3d8da5226e27 100644 --- a/drivers/phy/phy-can-transceiver.c +++ b/drivers/phy/phy-can-transceiver.c @@ -10,6 +10,7 @@ #include<linux/module.h> #include<linux/gpio.h> #include<linux/gpio/consumer.h> +#include <linux/mux/consumer.h> struct can_transceiver_data { u32 flags; @@ -21,13 +22,22 @@ struct can_transceiver_phy { struct phy *generic_phy; struct gpio_desc *standby_gpio; struct gpio_desc *enable_gpio; + struct mux_control *mux_ctrl; }; /* Power on function */ static int can_transceiver_phy_power_on(struct phy *phy) { + int ret; struct can_transceiver_phy *can_transceiver_phy = phy_get_drvdata(phy); + if (can_transceiver_phy->mux_ctrl) { + ret = mux_control_select(can_transceiver_phy->mux_ctrl, 1); + if (ret) { + dev_err(&phy->dev, "Failed to select CAN mux: %d\n", ret); + return ret; + } + } if (can_transceiver_phy->standby_gpio) gpiod_set_value_cansleep(can_transceiver_phy->standby_gpio, 0); if (can_transceiver_phy->enable_gpio) @@ -45,6 +55,8 @@ static int can_transceiver_phy_power_off(struct phy *phy) gpiod_set_value_cansleep(can_transceiver_phy->standby_gpio, 1); if (can_transceiver_phy->enable_gpio) gpiod_set_value_cansleep(can_transceiver_phy->enable_gpio, 0); + if (can_transceiver_phy->mux_ctrl) + mux_control_deselect(can_transceiver_phy->mux_ctrl); return 0; } @@ -95,6 +107,15 @@ static int can_transceiver_phy_probe(struct platform_device *pdev) match = of_match_node(can_transceiver_phy_ids, pdev->dev.of_node); drvdata = match->data; + if (of_property_read_bool(dev->of_node, "mux-controls")) { + struct mux_control *control; + + control = devm_mux_control_get(dev, NULL); + if (IS_ERR(control)) + return PTR_ERR(control); + can_transceiver_phy->mux_ctrl = control; + } + phy = devm_phy_create(dev, dev->of_node, &can_transceiver_phy_ops); if (IS_ERR(phy)) { -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Aswath Govindraju <a-govindraju@ti.com> Cc: Vignesh Raghavendra <vigneshr@ti.com>, Kishon Vijay Abraham I <kishon@ti.com>, Nishanth Menon <nm@ti.com>, Aswath Govindraju <a-govindraju@ti.com>, Wolfgang Grandegger <wg@grandegger.com>, Marc Kleine-Budde <mkl@pengutronix.de>, Vinod Koul <vkoul@kernel.org>, Rob Herring <robh+dt@kernel.org>, <linux-can@vger.kernel.org>, <linux-phy@lists.infradead.org>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org> Subject: [PATCH RFC 2/2] phy: phy-can-transceiver: Add support for setting mux Date: Thu, 11 Nov 2021 22:13:12 +0530 [thread overview] Message-ID: <20211111164313.649-3-a-govindraju@ti.com> (raw) In-Reply-To: <20211111164313.649-1-a-govindraju@ti.com> On some boards, for routing CAN signals from controller to transceiver, muxes might need to be set. Therefore, add support for setting the mux by reading the mux-controls property from the device tree node. Signed-off-by: Aswath Govindraju <a-govindraju@ti.com> --- drivers/phy/phy-can-transceiver.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/phy/phy-can-transceiver.c b/drivers/phy/phy-can-transceiver.c index 6f3fe37dee0e..3d8da5226e27 100644 --- a/drivers/phy/phy-can-transceiver.c +++ b/drivers/phy/phy-can-transceiver.c @@ -10,6 +10,7 @@ #include<linux/module.h> #include<linux/gpio.h> #include<linux/gpio/consumer.h> +#include <linux/mux/consumer.h> struct can_transceiver_data { u32 flags; @@ -21,13 +22,22 @@ struct can_transceiver_phy { struct phy *generic_phy; struct gpio_desc *standby_gpio; struct gpio_desc *enable_gpio; + struct mux_control *mux_ctrl; }; /* Power on function */ static int can_transceiver_phy_power_on(struct phy *phy) { + int ret; struct can_transceiver_phy *can_transceiver_phy = phy_get_drvdata(phy); + if (can_transceiver_phy->mux_ctrl) { + ret = mux_control_select(can_transceiver_phy->mux_ctrl, 1); + if (ret) { + dev_err(&phy->dev, "Failed to select CAN mux: %d\n", ret); + return ret; + } + } if (can_transceiver_phy->standby_gpio) gpiod_set_value_cansleep(can_transceiver_phy->standby_gpio, 0); if (can_transceiver_phy->enable_gpio) @@ -45,6 +55,8 @@ static int can_transceiver_phy_power_off(struct phy *phy) gpiod_set_value_cansleep(can_transceiver_phy->standby_gpio, 1); if (can_transceiver_phy->enable_gpio) gpiod_set_value_cansleep(can_transceiver_phy->enable_gpio, 0); + if (can_transceiver_phy->mux_ctrl) + mux_control_deselect(can_transceiver_phy->mux_ctrl); return 0; } @@ -95,6 +107,15 @@ static int can_transceiver_phy_probe(struct platform_device *pdev) match = of_match_node(can_transceiver_phy_ids, pdev->dev.of_node); drvdata = match->data; + if (of_property_read_bool(dev->of_node, "mux-controls")) { + struct mux_control *control; + + control = devm_mux_control_get(dev, NULL); + if (IS_ERR(control)) + return PTR_ERR(control); + can_transceiver_phy->mux_ctrl = control; + } + phy = devm_phy_create(dev, dev->of_node, &can_transceiver_phy_ops); if (IS_ERR(phy)) { -- 2.17.1 -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy
next prev parent reply other threads:[~2021-11-11 16:43 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-11-11 16:43 [PATCH RFC 0/2] CAN TRANSCEIVER: Add support for setting mux Aswath Govindraju 2021-11-11 16:43 ` Aswath Govindraju 2021-11-11 16:43 ` [PATCH RFC 1/2] dt-bindings: phy: ti,tcan104x-can: Document mux-controls property Aswath Govindraju 2021-11-11 16:43 ` [PATCH RFC 1/2] dt-bindings: phy: ti, tcan104x-can: " Aswath Govindraju 2021-11-11 16:43 ` Aswath Govindraju [this message] 2021-11-11 16:43 ` [PATCH RFC 2/2] phy: phy-can-transceiver: Add support for setting mux Aswath Govindraju 2021-11-12 8:40 ` Marc Kleine-Budde 2021-11-12 8:40 ` Marc Kleine-Budde 2021-11-12 13:48 ` Aswath Govindraju 2021-11-12 13:48 ` Aswath Govindraju 2021-11-12 19:15 ` Peter Rosin 2021-11-12 19:15 ` Peter Rosin 2021-11-15 6:31 ` Aswath Govindraju 2021-11-15 6:31 ` Aswath Govindraju 2021-11-17 21:24 ` Peter Rosin 2021-11-17 21:24 ` Peter Rosin 2021-11-18 11:12 ` Aswath Govindraju 2021-11-18 11:12 ` Aswath Govindraju 2021-11-18 12:44 ` Peter Rosin 2021-11-18 12:44 ` Peter Rosin 2021-11-19 7:42 ` Aswath Govindraju 2021-11-19 7:42 ` Aswath Govindraju 2021-11-22 13:04 ` [PATCH RFC 0/2] CAN TRANSCEIVER: " Aswath Govindraju 2021-11-22 13:04 ` Aswath Govindraju
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