* [RFC PATCH 2/2] usb: typec: sama7g5_tcpc: add driver for Microchip sama7g5 tcpc
2021-03-29 21:33 [RFC PATCH 0/2] usb: typec: Add driver for Microchip sama7g5 tcpc cristian.birsan
2021-03-29 21:33 ` [RFC PATCH 1/2] dt-bindings: usb: Add DT bindings " cristian.birsan
@ 2021-03-29 21:33 ` cristian.birsan
1 sibling, 0 replies; 4+ messages in thread
From: cristian.birsan @ 2021-03-29 21:33 UTC (permalink / raw)
To: linux, heikki.krogerus, gregkh, robh+dt
Cc: linux-usb, linux-kernel, linux-arm-kernel, devicetree, Cristian Birsan
From: Cristian Birsan <cristian.birsan@microchip.com>
This patch adds initial driver support for the new Microchip USB
Type-C Port Controller (TCPC) embedded in sama7g5 SoC.
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
---
drivers/usb/typec/tcpm/Kconfig | 8 +
drivers/usb/typec/tcpm/Makefile | 1 +
drivers/usb/typec/tcpm/sama7g5_tcpc.c | 602 ++++++++++++++++++++++++++
3 files changed, 611 insertions(+)
create mode 100644 drivers/usb/typec/tcpm/sama7g5_tcpc.c
diff --git a/drivers/usb/typec/tcpm/Kconfig b/drivers/usb/typec/tcpm/Kconfig
index 557f392fe24d..8ba0fd85741f 100644
--- a/drivers/usb/typec/tcpm/Kconfig
+++ b/drivers/usb/typec/tcpm/Kconfig
@@ -52,6 +52,14 @@ config TYPEC_FUSB302
Type-C Port Controller Manager to provide USB PD and USB
Type-C functionalities.
+config TYPEC_SAMA7G5
+ tristate "Microchip SAMA7G5 Type-C Port Controller driver"
+ select REGMAP_MMIO
+ help
+ Say Y or M here if your system has SAMA7G5 TCPC controller.
+ It works with Type-C Port Controller Manager to provide USB
+ Type-C functionalities.
+
config TYPEC_WCOVE
tristate "Intel WhiskeyCove PMIC USB Type-C PHY driver"
depends on ACPI
diff --git a/drivers/usb/typec/tcpm/Makefile b/drivers/usb/typec/tcpm/Makefile
index 7d499f3569fd..9abe8a7ae1cc 100644
--- a/drivers/usb/typec/tcpm/Makefile
+++ b/drivers/usb/typec/tcpm/Makefile
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_TYPEC_TCPM) += tcpm.o
obj-$(CONFIG_TYPEC_FUSB302) += fusb302.o
+obj-$(CONFIG_TYPEC_SAMA7G5) += sama7g5_tcpc.o
obj-$(CONFIG_TYPEC_WCOVE) += typec_wcove.o
typec_wcove-y := wcove.o
obj-$(CONFIG_TYPEC_TCPCI) += tcpci.o
diff --git a/drivers/usb/typec/tcpm/sama7g5_tcpc.c b/drivers/usb/typec/tcpm/sama7g5_tcpc.c
new file mode 100644
index 000000000000..d1a912976418
--- /dev/null
+++ b/drivers/usb/typec/tcpm/sama7g5_tcpc.c
@@ -0,0 +1,602 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Microchip SAMA7G5 Type-C Port Controller Driver
+ *
+ * Copyright (C) 2021 Microchip Technology, Inc. and its subsidiaries
+ */
+
+#include <linux/clk.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/usb/pd.h>
+#include <linux/usb/tcpm.h>
+#include <linux/usb/typec.h>
+
+#define SAMA7G5_TCPC_GCLK 32000
+
+/* TCPC registers offsets */
+#define TCPC_CR 0x80 /* TCPC Control Register */
+#define TCPC_UPC 0xA0 /* TCPC PHY Control Register */
+#define TCPC_UPS 0xA4 /* TCPC PHY Status Register */
+
+#define TCPC_CR_RESET 0x54434301 /* Magic value */
+
+/* TCPC PHY Control Register */
+#define TCPC_UPC_BCDETE BIT(29)
+#define TCPC_UPC_BCVSRCE BIT(28)
+#define TCPC_UPC_BCDETSEL BIT(27)
+#define TCPC_UPC_BCIDPSRCE BIT(26)
+#define TCPC_UPC_DMPDFE BIT(25)
+#define TCPC_UPC_DMPDFD BIT(24)
+#define TCPC_UPC_IP_OFF (0 << 12)
+#define TCPC_UPC_IP_0P5 (1 << 12)
+#define TCPC_UPC_IP_1P5 (2 << 12)
+#define TCPC_UPC_IP_3P0 (3 << 12)
+#define TCPC_UPC_THRESHOLD0 (0 << 8)
+#define TCPC_UPC_THRESHOLD2 (2 << 8)
+#define TCPC_UPC_THRESHOLD4 (4 << 8)
+#define TCPC_UPC_THRESHOLD6 (6 << 8)
+
+/* TCPC PHY Status Register */
+#define TCPC_UPS_CC2RDT BIT(4)
+#define TCPC_UPS_CC1ID BIT(3)
+#define TCPC_UPS_CC_MASK GENMASK(4, 3)
+#define TCPC_UPS_CHGDCP BIT(2)
+#define TCPC_UPS_DM BIT(1)
+#define TCPC_UPS_DP BIT(0)
+
+#define TCPC_VERSION 0xFC
+
+/* USB Type-C measurement timings */
+#define T_CC_MEASURE 100 /* 100 ms */
+
+#define SAMA7G5_TCPC_VBUS_IRQFLAGS (IRQF_ONESHOT \
+ | IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING)
+
+struct sama7g5_tcpc {
+ struct device *dev;
+
+ struct workqueue_struct *wq;
+ struct delayed_work measure_work;
+
+ struct regmap *regmap;
+ void __iomem *base;
+
+ struct clk *pclk;
+ struct clk *gclk;
+
+ struct gpio_desc *vbus_pin;
+ struct regulator *vbus;
+
+ /* lock for sharing states */
+ struct mutex lock;
+
+ /* port status */
+ enum typec_cc_polarity cc_polarity;
+ enum typec_cc_status cc1_status;
+ enum typec_cc_status cc2_status;
+ enum typec_cc_status cc1_status_prev;
+ enum typec_cc_status cc2_status_prev;
+
+ /* mutex used for VBUS detection */
+ struct mutex vbus_mutex;
+ int vbus_present;
+ int vbus_present_prev;
+
+ unsigned int phy_status;
+ unsigned int phy_status_old;
+
+ struct tcpc_dev tcpc;
+ struct tcpm_port *tcpm;
+};
+
+#define tcpc_to_sama7g5_tcpc(_tcpc_) \
+ container_of(_tcpc_, struct sama7g5_tcpc, tcpc)
+
+static bool sama7g5_tcpc_readable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case TCPC_CR:
+ case TCPC_UPC:
+ case TCPC_UPS:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool sama7g5_tcpc_writeable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case TCPC_CR:
+ case TCPC_UPC:
+ case TCPC_UPS:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config sama7g5_tcpc_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = TCPC_VERSION,
+ .readable_reg = sama7g5_tcpc_readable_reg,
+ .writeable_reg = sama7g5_tcpc_writeable_reg,
+};
+
+static int sama7g5_tcpc_get_vbus(struct tcpc_dev *tcpc)
+{
+ struct sama7g5_tcpc *sama7g5_tcpc = tcpc_to_sama7g5_tcpc(tcpc);
+ int ret;
+
+ mutex_lock(&sama7g5_tcpc->vbus_mutex);
+ ret = sama7g5_tcpc->vbus_present ? 1 : 0;
+ mutex_unlock(&sama7g5_tcpc->vbus_mutex);
+
+ return ret;
+}
+
+static int sama7g5_tcpc_set_vbus(struct tcpc_dev *tcpc, bool on, bool sink)
+{
+ struct sama7g5_tcpc *sama7g5_tcpc = tcpc_to_sama7g5_tcpc(tcpc);
+ int ret;
+
+ mutex_lock(&sama7g5_tcpc->vbus_mutex);
+ if (on)
+ ret = regulator_enable(sama7g5_tcpc->vbus);
+ else
+ ret = regulator_disable(sama7g5_tcpc->vbus);
+ mutex_unlock(&sama7g5_tcpc->vbus_mutex);
+
+ return ret;
+}
+
+static int sama7g5_tcpc_set_vconn(struct tcpc_dev *tcpc, bool on)
+{
+ /* VCONN is not supported */
+ return -EPERM;
+}
+
+static int sama7g5_tcpc_get_cc(struct tcpc_dev *tcpc, enum typec_cc_status *cc1,
+ enum typec_cc_status *cc2)
+{
+ struct sama7g5_tcpc *sama7g5_tcpc = tcpc_to_sama7g5_tcpc(tcpc);
+
+ mutex_lock(&sama7g5_tcpc->lock);
+ *cc1 = sama7g5_tcpc->cc1_status;
+ *cc2 = sama7g5_tcpc->cc2_status;
+ mutex_unlock(&sama7g5_tcpc->lock);
+
+ return 0;
+}
+
+static int sama7g5_tcpc_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc)
+{
+ struct sama7g5_tcpc *sama7g5_tcpc = tcpc_to_sama7g5_tcpc(tcpc);
+ unsigned int ctrl;
+ int ret = 0;
+
+ mutex_lock(&sama7g5_tcpc->lock);
+ switch (cc) {
+ case TYPEC_CC_RD:
+ ctrl = TCPC_UPC_IP_OFF;
+ break;
+ case TYPEC_CC_RP_DEF:
+ ctrl = TCPC_UPC_IP_0P5;
+ break;
+ default:
+ ret = -EINVAL;
+ goto done;
+ }
+ ret = regmap_write(sama7g5_tcpc->regmap, TCPC_UPC, ctrl);
+done:
+ mutex_unlock(&sama7g5_tcpc->lock);
+ return ret;
+}
+
+static int sama7g5_tcpc_set_polarity(struct tcpc_dev *tcpc,
+ enum typec_cc_polarity pol)
+{
+ return 0;
+}
+
+static int sama7g5_tcpc_set_roles(struct tcpc_dev *tcpc, bool attached,
+ enum typec_role role, enum typec_data_role data)
+{
+ return 0;
+}
+
+static int sama7g5_tcpc_set_pd_rx(struct tcpc_dev *tcpc, bool on)
+{
+ return -EPERM;
+}
+
+static int sama7g5_tcpc_pd_transmit(struct tcpc_dev *tcpc,
+ enum tcpm_transmit_type type,
+ const struct pd_message *msg)
+{
+ return -EPERM;
+}
+
+static int sama7g5_tcpc_start_toggling(struct tcpc_dev *tcpc,
+ enum typec_port_type port_type,
+ enum typec_cc_status cc)
+{
+ return -EOPNOTSUPP;
+}
+
+static void _sama7g5_tcpc_measure_snk(struct sama7g5_tcpc *sama7g5_tcpc)
+{
+ int ret;
+
+ /* Save previous CC1/CC2 state */
+ sama7g5_tcpc->cc1_status_prev = sama7g5_tcpc->cc1_status;
+ sama7g5_tcpc->cc2_status_prev = sama7g5_tcpc->cc2_status;
+
+ /* Comparator Threshold 2 */
+ ret = regmap_write(sama7g5_tcpc->regmap, TCPC_UPC, TCPC_UPC_IP_OFF |
+ TCPC_UPC_THRESHOLD2);
+ if (ret)
+ dev_err(sama7g5_tcpc->dev, "failed to wite register: %d\n",
+ ret);
+
+ usleep_range(560, 1000);
+
+ ret = regmap_read(sama7g5_tcpc->regmap, TCPC_UPS,
+ &sama7g5_tcpc->phy_status);
+ if (ret)
+ dev_err(sama7g5_tcpc->dev, "failed to read register: %d\n",
+ ret);
+
+ if (!(sama7g5_tcpc->phy_status & TCPC_UPS_CC_MASK)) {
+ /* VRa*/
+ sama7g5_tcpc->cc1_status = TYPEC_CC_OPEN;
+ sama7g5_tcpc->cc2_status = TYPEC_CC_OPEN;
+ return;
+ }
+
+ /* CC1 or CC2 is connected wait for PD messages to end ~ 30ms */
+ usleep_range(30000, 35000);
+
+ /* Comparator Threshold 4 */
+ sama7g5_tcpc->phy_status_old = sama7g5_tcpc->phy_status;
+
+ ret = regmap_write(sama7g5_tcpc->regmap, TCPC_UPC, TCPC_UPC_IP_OFF |
+ TCPC_UPC_THRESHOLD4);
+ if (ret)
+ dev_err(sama7g5_tcpc->dev, "failed to wite register: %d\n",
+ ret);
+
+ usleep_range(560, 1000);
+ ret = regmap_read(sama7g5_tcpc->regmap, TCPC_UPS,
+ &sama7g5_tcpc->phy_status);
+ if (ret)
+ dev_err(sama7g5_tcpc->dev, "failed to read register: %d\n",
+ ret);
+
+ if ((sama7g5_tcpc->phy_status_old & TCPC_UPS_CC1ID) &&
+ (!(sama7g5_tcpc->phy_status & TCPC_UPS_CC1ID))) {
+ sama7g5_tcpc->cc1_status = TYPEC_CC_RP_DEF;
+ sama7g5_tcpc->cc2_status = TYPEC_CC_OPEN;
+ return;
+ }
+
+ if ((sama7g5_tcpc->phy_status_old & TCPC_UPS_CC2RDT) &&
+ (!(sama7g5_tcpc->phy_status & TCPC_UPS_CC2RDT))) {
+ sama7g5_tcpc->cc1_status = TYPEC_CC_OPEN;
+ sama7g5_tcpc->cc2_status = TYPEC_CC_RP_DEF;
+ return;
+ }
+
+ /* Comparator Threshold 6 */
+ sama7g5_tcpc->phy_status_old = sama7g5_tcpc->phy_status;
+
+ ret = regmap_write(sama7g5_tcpc->regmap, TCPC_UPC, TCPC_UPC_IP_OFF |
+ TCPC_UPC_THRESHOLD6);
+ if (ret)
+ dev_err(sama7g5_tcpc->dev, "failed to wite register: %d\n",
+ ret);
+
+ usleep_range(560, 1000);
+ ret = regmap_read(sama7g5_tcpc->regmap, TCPC_UPS,
+ &sama7g5_tcpc->phy_status);
+ if (ret)
+ dev_err(sama7g5_tcpc->dev, "failed to read register: %d\n",
+ ret);
+
+ if ((sama7g5_tcpc->phy_status_old & TCPC_UPS_CC1ID) &&
+ (!(sama7g5_tcpc->phy_status & TCPC_UPS_CC1ID))) {
+ sama7g5_tcpc->cc1_status = TYPEC_CC_RP_1_5;
+ sama7g5_tcpc->cc2_status = TYPEC_CC_OPEN;
+ return;
+ }
+
+ if ((sama7g5_tcpc->phy_status_old & TCPC_UPS_CC1ID) &&
+ ((sama7g5_tcpc->phy_status & TCPC_UPS_CC1ID))) {
+ sama7g5_tcpc->cc1_status = TYPEC_CC_RP_3_0;
+ sama7g5_tcpc->cc2_status = TYPEC_CC_OPEN;
+ return;
+ }
+
+ if ((sama7g5_tcpc->phy_status_old & TCPC_UPS_CC2RDT) &&
+ (!(sama7g5_tcpc->phy_status & TCPC_UPS_CC2RDT))) {
+ sama7g5_tcpc->cc1_status = TYPEC_CC_OPEN;
+ sama7g5_tcpc->cc2_status = TYPEC_CC_RP_1_5;
+ return;
+ }
+
+ if ((sama7g5_tcpc->phy_status_old & TCPC_UPS_CC2RDT) &&
+ ((sama7g5_tcpc->phy_status & TCPC_UPS_CC2RDT))) {
+ sama7g5_tcpc->cc1_status = TYPEC_CC_OPEN;
+ sama7g5_tcpc->cc2_status = TYPEC_CC_RP_3_0;
+ return;
+ }
+}
+
+static void sama7g5_tcpc_measure_work(struct work_struct *work)
+{
+ struct sama7g5_tcpc *port = container_of(work, struct sama7g5_tcpc,
+ measure_work.work);
+
+ mutex_lock(&port->lock);
+
+ _sama7g5_tcpc_measure_snk(port);
+
+ /* Check if the state has changed and notify TCPM */
+ if (port->cc1_status != port->cc1_status_prev ||
+ port->cc2_status != port->cc2_status_prev)
+ tcpm_cc_change(port->tcpm);
+
+ mod_delayed_work(port->wq, &port->measure_work,
+ msecs_to_jiffies(T_CC_MEASURE));
+
+ mutex_unlock(&port->lock);
+}
+
+static int sama7g5_tcpc_init(struct tcpc_dev *tcpc)
+{
+ struct sama7g5_tcpc *sama7g5_tcpc = tcpc_to_sama7g5_tcpc(tcpc);
+ int ret;
+
+ ret = regmap_write(sama7g5_tcpc->regmap, TCPC_CR, TCPC_CR_RESET);
+ if (ret)
+ return ret;
+
+ sama7g5_tcpc->wq =
+ create_singlethread_workqueue(dev_name(sama7g5_tcpc->dev));
+ if (!sama7g5_tcpc->wq)
+ return -ENOMEM;
+
+ INIT_DELAYED_WORK(&sama7g5_tcpc->measure_work,
+ sama7g5_tcpc_measure_work);
+
+ sama7g5_tcpc->cc1_status = TYPEC_CC_OPEN;
+ sama7g5_tcpc->cc2_status = TYPEC_CC_OPEN;
+ sama7g5_tcpc->cc1_status_prev = TYPEC_CC_OPEN;
+ sama7g5_tcpc->cc2_status_prev = TYPEC_CC_OPEN;
+ sama7g5_tcpc->cc_polarity = TYPEC_POLARITY_CC1;
+
+ /* We do not have an interrupt so polling only */
+ mod_delayed_work(sama7g5_tcpc->wq, &sama7g5_tcpc->measure_work,
+ msecs_to_jiffies(T_CC_MEASURE));
+
+ /* Enable VBUS detection */
+ if (sama7g5_tcpc->vbus_pin)
+ enable_irq(gpiod_to_irq(sama7g5_tcpc->vbus_pin));
+
+ return 0;
+}
+
+static int vbus_is_present(struct sama7g5_tcpc *sama7g5_tcpc)
+{
+ if (sama7g5_tcpc->vbus_pin)
+ return gpiod_get_value(sama7g5_tcpc->vbus_pin);
+
+ /* No Vbus detection: Assume always present */
+ return 1;
+}
+
+static irqreturn_t sama7g5_vbus_irq_thread(int irq, void *devid)
+{
+ struct sama7g5_tcpc *sama7g5_tcpc = devid;
+
+ /* debounce */
+ udelay(10);
+
+ mutex_lock(&sama7g5_tcpc->vbus_mutex);
+
+ sama7g5_tcpc->vbus_present = vbus_is_present(sama7g5_tcpc);
+ if (sama7g5_tcpc->vbus_present != sama7g5_tcpc->vbus_present_prev) {
+ /* VBUS changed, notify TCPM */
+ tcpm_vbus_change(sama7g5_tcpc->tcpm);
+ sama7g5_tcpc->vbus_present_prev = sama7g5_tcpc->vbus_present;
+ }
+
+ mutex_unlock(&sama7g5_tcpc->vbus_mutex);
+ return IRQ_HANDLED;
+}
+
+static int sama7g5_tcpc_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct sama7g5_tcpc *sama7g5_tcpc;
+
+ struct resource *mem;
+ void __iomem *base;
+
+ sama7g5_tcpc = devm_kzalloc(&pdev->dev, sizeof(*sama7g5_tcpc),
+ GFP_KERNEL);
+ if (!sama7g5_tcpc)
+ return -ENOMEM;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(&pdev->dev, mem);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+ sama7g5_tcpc->base = base;
+
+ sama7g5_tcpc->regmap = devm_regmap_init_mmio(&pdev->dev, base,
+ &sama7g5_tcpc_regmap_config);
+ if (IS_ERR(sama7g5_tcpc->regmap)) {
+ dev_err(&pdev->dev, "Regmap init failed\n");
+ return PTR_ERR(sama7g5_tcpc->regmap);
+ }
+
+ /* Get the peripheral clock */
+ sama7g5_tcpc->pclk = devm_clk_get(&pdev->dev, "pclk");
+ if (IS_ERR(sama7g5_tcpc->pclk)) {
+ ret = PTR_ERR(sama7g5_tcpc->pclk);
+ dev_err(&pdev->dev,
+ "failed to get the peripheral clock: %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(sama7g5_tcpc->pclk);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "failed to enable the peripheral clock: %d\n", ret);
+ return ret;
+ }
+
+ /* Get the generic clock */
+ sama7g5_tcpc->gclk = devm_clk_get(&pdev->dev, "gclk");
+ if (IS_ERR(sama7g5_tcpc->gclk)) {
+ ret = PTR_ERR(sama7g5_tcpc->gclk);
+ dev_err(&pdev->dev,
+ "failed to get the PMC generic clock: %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_set_rate(sama7g5_tcpc->gclk, SAMA7G5_TCPC_GCLK);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "unable to change gclk rate to: %u\n",
+ SAMA7G5_TCPC_GCLK);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(sama7g5_tcpc->gclk);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "failed to enable the generic clock: %d\n", ret);
+ return ret;
+ }
+
+ mutex_init(&sama7g5_tcpc->lock);
+ mutex_init(&sama7g5_tcpc->vbus_mutex);
+
+ sama7g5_tcpc->vbus_pin = devm_gpiod_get_optional(&pdev->dev,
+ "microchip,vbus", GPIOD_IN);
+
+ if (IS_ERR(sama7g5_tcpc->vbus_pin)) {
+ ret = PTR_ERR(sama7g5_tcpc->vbus_pin);
+ dev_err(&pdev->dev, "unable to claim vbus-gpio: %d\n", ret);
+ }
+
+ sama7g5_tcpc->vbus = devm_regulator_get_optional(&pdev->dev, "vbus");
+
+ if (IS_ERR(sama7g5_tcpc->vbus)) {
+ ret = PTR_ERR(sama7g5_tcpc->vbus);
+ dev_err(&pdev->dev, "unable to claim vbus-supply: %d\n", ret);
+ }
+
+ if (sama7g5_tcpc->vbus_pin) {
+ irq_set_status_flags(gpiod_to_irq(sama7g5_tcpc->vbus_pin),
+ IRQ_NOAUTOEN);
+ ret = devm_request_threaded_irq(&pdev->dev,
+ gpiod_to_irq(sama7g5_tcpc->vbus_pin), NULL,
+ sama7g5_vbus_irq_thread,
+ SAMA7G5_TCPC_VBUS_IRQFLAGS,
+ "sama7g5_tcpc", sama7g5_tcpc);
+ if (ret) {
+ sama7g5_tcpc->vbus_pin = NULL;
+ dev_warn(&pdev->dev,
+ "failed to request vbus irq; "
+ "assuming always on\n");
+ }
+ }
+
+ sama7g5_tcpc->dev = &pdev->dev;
+ platform_set_drvdata(pdev, sama7g5_tcpc);
+
+ sama7g5_tcpc->tcpc.init = sama7g5_tcpc_init;
+ sama7g5_tcpc->tcpc.get_vbus = sama7g5_tcpc_get_vbus;
+ sama7g5_tcpc->tcpc.set_vbus = sama7g5_tcpc_set_vbus;
+ sama7g5_tcpc->tcpc.set_cc = sama7g5_tcpc_set_cc;
+ sama7g5_tcpc->tcpc.get_cc = sama7g5_tcpc_get_cc;
+ sama7g5_tcpc->tcpc.set_polarity = sama7g5_tcpc_set_polarity;
+ sama7g5_tcpc->tcpc.set_vconn = sama7g5_tcpc_set_vconn;
+ sama7g5_tcpc->tcpc.start_toggling = sama7g5_tcpc_start_toggling;
+ sama7g5_tcpc->tcpc.set_pd_rx = sama7g5_tcpc_set_pd_rx;
+ sama7g5_tcpc->tcpc.set_roles = sama7g5_tcpc_set_roles;
+ sama7g5_tcpc->tcpc.pd_transmit = sama7g5_tcpc_pd_transmit;
+
+ sama7g5_tcpc->tcpc.fwnode = device_get_named_child_node(&pdev->dev,
+ "connector");
+ if (!sama7g5_tcpc->tcpc.fwnode) {
+ dev_err(&pdev->dev, "Can't find connector node.\n");
+ return -EINVAL;
+ }
+
+ sama7g5_tcpc->tcpm = tcpm_register_port(sama7g5_tcpc->dev,
+ &sama7g5_tcpc->tcpc);
+ if (IS_ERR(sama7g5_tcpc->tcpm)) {
+ fwnode_remove_software_node(sama7g5_tcpc->tcpc.fwnode);
+ return PTR_ERR(sama7g5_tcpc->tcpm);
+ }
+
+ return 0;
+}
+
+static int sama7g5_tcpc_remove(struct platform_device *pdev)
+{
+ struct sama7g5_tcpc *sama7g5_tcpc;
+
+ sama7g5_tcpc = platform_get_drvdata(pdev);
+
+ /* Mask everything */
+ if (sama7g5_tcpc->vbus_pin)
+ disable_irq(gpiod_to_irq(sama7g5_tcpc->vbus_pin));
+
+
+ if (!IS_ERR_OR_NULL(sama7g5_tcpc->tcpm))
+ tcpm_unregister_port(sama7g5_tcpc->tcpm);
+
+ destroy_workqueue(sama7g5_tcpc->wq);
+
+ clk_disable_unprepare(sama7g5_tcpc->gclk);
+ clk_disable_unprepare(sama7g5_tcpc->pclk);
+
+ return 0;
+}
+
+static const struct of_device_id sama7g5_tcpc_dt_ids[] = {
+ {
+ .compatible = "microchip,sama7g5-tcpc",
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sama7g5_tcpc_dt_ids);
+
+static struct platform_driver sama7g5_tcpc_driver = {
+ .probe = sama7g5_tcpc_probe,
+ .remove = sama7g5_tcpc_remove,
+ .driver = {
+ .name = "microchip,sama7g5-tcpc",
+ .of_match_table = sama7g5_tcpc_dt_ids,
+ },
+};
+module_platform_driver(sama7g5_tcpc_driver);
+
+MODULE_AUTHOR("Cristian Birsan <cristian.birsan@microchip.com>");
+MODULE_DESCRIPTION("Microchip SAMA7G5 Type-C Port Controller Driver");
+MODULE_LICENSE("GPL");
--
2.25.1
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