--- /dev/null
+/*
+ * Arche Platform driver to enable Unipro link.
+ *
+ * Copyright 2014-2015 Google Inc.
+ * Copyright 2014-2015 Linaro Ltd.
+ *
+ * Released under the GPLv2 only.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/sched.h>
+#include <linux/pm.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
+#include <linux/of_irq.h>
+#include <linux/spinlock.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pinctrl/consumer.h>
+
+struct arche_platform_drvdata {
+ /* Control GPIO signals to and from AP <=> SVC */
+ int svc_reset_gpio;
+ bool is_reset_act_hi;
+ int svc_sysboot_gpio;
+
+ unsigned int svc_refclk_req;
+ struct clk *svc_ref_clk;
+
+ struct pinctrl *pinctrl;
+ struct pinctrl_state *pin_default;
+
+ int num_apbs;
+};
+
+static inline void svc_reset_onoff(unsigned int gpio, bool onoff)
+{
+ gpio_set_value(gpio, onoff);
+}
+
+static void arche_platform_cleanup(struct arche_platform_drvdata *arche_pdata)
+{
+ /* As part of exit, put APB back in reset state */
+ if (gpio_is_valid(arche_pdata->svc_reset_gpio))
+ svc_reset_onoff(arche_pdata->svc_reset_gpio,
+ arche_pdata->is_reset_act_hi);
+}
+
+static int arche_platform_probe(struct platform_device *pdev)
+{
+ struct arche_platform_drvdata *arche_pdata;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ int ret;
+
+ arche_pdata = devm_kzalloc(&pdev->dev, sizeof(*arche_pdata), GFP_KERNEL);
+ if (!arche_pdata)
+ return -ENOMEM;
+
+ /* setup svc reset gpio */
+ arche_pdata->is_reset_act_hi = of_property_read_bool(np,
+ "svc,reset-active-high");
+ arche_pdata->svc_reset_gpio = of_get_named_gpio(np, "svc,reset-gpio", 0);
+ if (arche_pdata->svc_reset_gpio < 0) {
+ dev_err(dev, "failed to get reset-gpio\n");
+ return -ENODEV;
+ }
+ ret = devm_gpio_request(dev, arche_pdata->svc_reset_gpio, "svc-reset");
+ if (ret) {
+ dev_err(dev, "failed to request svc-reset gpio:%d\n", ret);
+ return ret;
+ }
+ ret = gpio_direction_output(arche_pdata->svc_reset_gpio,
+ arche_pdata->is_reset_act_hi);
+ if (ret) {
+ dev_err(dev, "failed to set svc-reset gpio dir:%d\n", ret);
+ return ret;
+ }
+
+ arche_pdata->svc_sysboot_gpio = of_get_named_gpio(np,
+ "svc,sysboot-gpio", 0);
+ if (arche_pdata->svc_sysboot_gpio < 0) {
+ dev_err(dev, "failed to get sysboot gpio\n");
+ return -ENODEV;
+ }
+ ret = devm_gpio_request(dev, arche_pdata->svc_sysboot_gpio, "sysboot0");
+ if (ret) {
+ dev_err(dev, "failed to request sysboot0 gpio:%d\n", ret);
+ return ret;
+ }
+ ret = gpio_direction_output(arche_pdata->svc_sysboot_gpio, 0);
+ if (ret) {
+ dev_err(dev, "failed to set svc-reset gpio dir:%d\n", ret);
+ return ret;
+ }
+
+ /* setup the clock request gpio first */
+ arche_pdata->svc_refclk_req = of_get_named_gpio(np,
+ "svc,refclk-req-gpio", 0);
+ if (arche_pdata->svc_refclk_req < 0) {
+ dev_err(dev, "failed to get svc clock-req gpio\n");
+ return -ENODEV;
+ }
+ ret = devm_gpio_request(dev, arche_pdata->svc_refclk_req, "svc-clk-req");
+ if (ret) {
+ dev_err(dev, "failed to request svc-clk-req gpio: %d\n", ret);
+ return ret;
+ }
+ ret = gpio_direction_input(arche_pdata->svc_refclk_req);
+ if (ret) {
+ dev_err(dev, "failed to set svc-clk-req gpio dir :%d\n", ret);
+ return ret;
+ }
+
+ /* setup refclk2 to follow the pin */
+ arche_pdata->svc_ref_clk = devm_clk_get(dev, "svc_ref_clk");
+ if (IS_ERR(arche_pdata->svc_ref_clk)) {
+ ret = PTR_ERR(arche_pdata->svc_ref_clk);
+ dev_err(dev, "failed to get svc_ref_clk: %d\n", ret);
+ return ret;
+ }
+ ret = clk_prepare_enable(arche_pdata->svc_ref_clk);
+ if (ret) {
+ dev_err(dev, "failed to enable svc_ref_clk: %d\n", ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, arche_pdata);
+
+ /* bring SVC out of reset */
+ svc_reset_onoff(arche_pdata->svc_reset_gpio,
+ !arche_pdata->is_reset_act_hi);
+
+ arche_pdata->num_apbs = of_get_child_count(np);
+ dev_dbg(dev, "Number of APB's available - %d\n", arche_pdata->num_apbs);
+
+ /* probe all childs here */
+ ret = of_platform_populate(np, NULL, NULL, dev);
+ if (ret)
+ dev_err(dev, "no child node found\n");
+
+ dev_info(dev, "Device registered successfully\n");
+ return ret;
+}
+
+static int arche_platform_remove(struct platform_device *pdev)
+{
+ struct arche_platform_drvdata *arche_pdata = platform_get_drvdata(pdev);
+
+ if (arche_pdata)
+ arche_platform_cleanup(arche_pdata);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static int arche_platform_suspend(struct device *dev)
+{
+ /*
+ * If timing profile premits, we may shutdown bridge
+ * completely
+ *
+ * TODO: sequence ??
+ *
+ * Also, need to make sure we meet precondition for unipro suspend
+ * Precondition: Definition ???
+ */
+ return 0;
+}
+
+static int arche_platform_resume(struct device *dev)
+{
+ /*
+ * Atleast for ES2 we have to meet the delay requirement between
+ * unipro switch and AP bridge init, depending on whether bridge is in
+ * OFF state or standby state.
+ *
+ * Based on whether bridge is in standby or OFF state we may have to
+ * assert multiple signals. Please refer to WDM spec, for more info.
+ *
+ */
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(arche_platform_pm_ops,
+ arche_platform_suspend,
+ arche_platform_resume);
+
+static struct of_device_id arche_platform_of_match[] = {
+ { .compatible = "google,arche-platform", }, /* Use PID/VID of SVC device */
+ { },
+};
+MODULE_DEVICE_TABLE(of, arche_platform_of_match);
+
+static struct platform_driver arche_platform_device_driver = {
+ .probe = arche_platform_probe,
+ .remove = arche_platform_remove,
+ .driver = {
+ .name = "arche-platform-ctrl",
+ .pm = &arche_platform_pm_ops,
+ .of_match_table = of_match_ptr(arche_platform_of_match),
+ }
+};
+
+module_platform_driver(arche_platform_device_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Vaibhav Hiremath <vaibhav.hiremath@linaro.org>");
+MODULE_DESCRIPTION("Arche Platform Driver");
+++ /dev/null
-/*
- * DB3 Platform driver to enable Unipro link.
- *
- * Copyright 2014-2015 Google Inc.
- * Copyright 2014-2015 Linaro Ltd.
- *
- * Released under the GPLv2 only.
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/sched.h>
-#include <linux/pm.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-#include <linux/clk.h>
-#include <linux/of_platform.h>
-#include <linux/of_gpio.h>
-#include <linux/of_irq.h>
-#include <linux/spinlock.h>
-#include <linux/regulator/consumer.h>
-#include <linux/pinctrl/consumer.h>
-
-struct db3_platform_drvdata {
- /* Control GPIO signals to and from AP <=> SVC */
- int svc_reset_gpio;
- bool is_reset_act_hi;
- int svc_sysboot_gpio;
-
- unsigned int svc_refclk_req;
- struct clk *svc_ref_clk;
-
- struct pinctrl *pinctrl;
- struct pinctrl_state *pin_default;
-
- int num_apbs;
-};
-
-static inline void svc_reset_onoff(unsigned int gpio, bool onoff)
-{
- gpio_set_value(gpio, onoff);
-}
-
-static void db3_platform_cleanup(struct db3_platform_drvdata *db3_pdata)
-{
- /* As part of exit, put APB back in reset state */
- if (gpio_is_valid(db3_pdata->svc_reset_gpio))
- svc_reset_onoff(db3_pdata->svc_reset_gpio,
- db3_pdata->is_reset_act_hi);
-}
-
-static int db3_platform_probe(struct platform_device *pdev)
-{
- struct db3_platform_drvdata *db3_pdata;
- struct device *dev = &pdev->dev;
- struct device_node *np = dev->of_node;
- int ret;
-
- db3_pdata = devm_kzalloc(&pdev->dev, sizeof(*db3_pdata), GFP_KERNEL);
- if (!db3_pdata)
- return -ENOMEM;
-
- /* setup svc reset gpio */
- db3_pdata->is_reset_act_hi = of_property_read_bool(np, "svc,reset-active-high");
- db3_pdata->svc_reset_gpio = of_get_named_gpio(np, "svc,reset-gpio", 0);
- if (db3_pdata->svc_reset_gpio < 0) {
- dev_err(dev, "failed to get reset-gpio\n");
- ret = -ENODEV;
- return ret;
- }
- ret = devm_gpio_request(dev, db3_pdata->svc_reset_gpio, "svc-reset");
- if (ret) {
- dev_err(dev, "failed to request svc-reset gpio:%d\n", ret);
- return ret;
- }
- ret = gpio_direction_output(db3_pdata->svc_reset_gpio, db3_pdata->is_reset_act_hi);
- if (ret) {
- dev_err(dev, "failed to set svc-reset gpio dir:%d\n", ret);
- return ret;
- }
-
- db3_pdata->svc_sysboot_gpio = of_get_named_gpio(np, "svc,sysboot-gpio", 0);
- if (db3_pdata->svc_sysboot_gpio < 0) {
- dev_err(dev, "failed to get sysboot gpio\n");
- ret = -ENODEV;
- return ret;
- }
- ret = devm_gpio_request(dev, db3_pdata->svc_sysboot_gpio, "sysboot0");
- if (ret) {
- dev_err(dev, "failed to request sysboot0 gpio:%d\n", ret);
- return ret;
- }
- ret = gpio_direction_output(db3_pdata->svc_sysboot_gpio, 0);
- if (ret) {
- dev_err(dev, "failed to set svc-reset gpio dir:%d\n", ret);
- return ret;
- }
-
- /* setup the clock request gpio first */
- db3_pdata->svc_refclk_req = of_get_named_gpio(np, "svc,refclk-req-gpio", 0);
- if (db3_pdata->svc_refclk_req < 0) {
- dev_err(dev, "failed to get svc clock-req gpio\n");
- return -ENODEV;
- }
- ret = devm_gpio_request(dev, db3_pdata->svc_refclk_req, "svc-clk-req");
- if (ret) {
- dev_err(dev, "failed to request svc-clk-req gpio: %d\n", ret);
- return ret;
- }
- ret = gpio_direction_input(db3_pdata->svc_refclk_req);
- if (ret) {
- dev_err(dev, "failed to set svc-clk-req gpio dir :%d\n", ret);
- return ret;
- }
-
- /* setup refclk2 to follow the pin */
- db3_pdata->svc_ref_clk = devm_clk_get(dev, "svc_ref_clk");
- if (IS_ERR(db3_pdata->svc_ref_clk)) {
- ret = PTR_ERR(db3_pdata->svc_ref_clk);
- dev_err(dev, "failed to get svc_ref_clk: %d\n", ret);
- return ret;
- }
- ret = clk_prepare_enable(db3_pdata->svc_ref_clk);
- if (ret) {
- dev_err(dev, "failed to enable svc_ref_clk: %d\n", ret);
- return ret;
- }
-
- platform_set_drvdata(pdev, db3_pdata);
-
- db3_pdata->num_apbs = of_get_child_count(np);
- dev_dbg(dev, "Number of APB's available - %d\n", db3_pdata->num_apbs);
-
- /* bring SVC out of reset */
- svc_reset_onoff(db3_pdata->svc_reset_gpio, !db3_pdata->is_reset_act_hi);
-
- /* probe all childs here */
- ret = of_platform_populate(np, NULL, NULL, dev);
- if (ret)
- dev_err(dev, "no child node found\n");
-
- dev_info(dev, "Device registered successfully\n");
- return ret;
-}
-
-static int db3_platform_remove(struct platform_device *pdev)
-{
- struct db3_platform_drvdata *db3_pdata = platform_get_drvdata(pdev);
-
- if (db3_pdata)
- db3_platform_cleanup(db3_pdata);
-
- platform_set_drvdata(pdev, NULL);
-
- return 0;
-}
-
-static int db3_platform_suspend(struct device *dev)
-{
- /*
- * If timing profile premits, we may shutdown bridge
- * completely
- *
- * TODO: sequence ??
- *
- * Also, need to make sure we meet precondition for unipro suspend
- * Precondition: Definition ???
- */
- return 0;
-}
-
-static int db3_platform_resume(struct device *dev)
-{
- /*
- * Atleast for ES2 we have to meet the delay requirement between
- * unipro switch and AP bridge init, depending on whether bridge is in
- * OFF state or standby state.
- *
- * Based on whether bridge is in standby or OFF state we may have to
- * assert multiple signals. Please refer to WDM spec, for more info.
- *
- */
- return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(db3_platform_pm_ops, db3_platform_suspend, db3_platform_resume);
-
-static struct of_device_id db3_platform_of_match[] = {
- { .compatible = "google,db3-platform", }, /* Use PID/VID of SVC device */
- { },
-};
-MODULE_DEVICE_TABLE(of, db3_platform_of_match);
-
-static struct platform_driver db3_platform_device_driver = {
- .probe = db3_platform_probe,
- .remove = db3_platform_remove,
- .driver = {
- .name = "db3-platform-ctrl",
- .pm = &db3_platform_pm_ops,
- .of_match_table = of_match_ptr(db3_platform_of_match),
- }
-};
-
-module_platform_driver(db3_platform_device_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Vaibhav Hiremath <vaibhav.hiremath@linaro.org>");
-MODULE_DESCRIPTION("DB3 Platform Driver");
projects / mirror_ubuntu-bionic-kernel.git / commitdiff