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2024-02-19 1c055e55a242a33e574e48be530e06770a210dcd

 kernel/drivers/usb/musb/davinci.c
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@@ -13,7 +13,7 @@
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 #include <linux/clk.h>
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 #include <linux/err.h>
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 #include <linux/io.h>
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-#include <linux/gpio.h>
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+#include <linux/gpio/consumer.h>
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 #include <linux/platform_device.h>
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 #include <linux/dma-mapping.h>
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 #include <linux/usb/usb_phy_generic.h>
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@@ -24,10 +24,6 @@
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 #include <asm/mach-types.h>
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 #include "musb_core.h"
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-
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-#ifdef CONFIG_MACH_DAVINCI_EVM
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-#define GPIO_nVBUS_DRV		160
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-#endif
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27
 
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 #include "davinci.h"
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 #include "cppi_dma.h"
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@@ -40,6 +36,9 @@
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 	struct device		*dev;
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 	struct platform_device	*musb;
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 	struct clk		*clk;
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+	bool			vbus_state;
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+	struct gpio_desc	*vbus;
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+	struct work_struct	vbus_work;
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 };
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 /* REVISIT (PM) we should be able to keep the PHY in low power mode most
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@@ -135,43 +134,44 @@
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  * when J10 is out, and TI documents it as handling OTG.
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  */
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136
 
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-#ifdef CONFIG_MACH_DAVINCI_EVM
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-
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-static int vbus_state = -1;
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-
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 /* I2C operations are always synchronous, and require a task context.
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  * With unloaded systems, using the shared workqueue seems to suffice
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  * to satisfy the 100msec A_WAIT_VRISE timeout...
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  */
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-static void evm_deferred_drvvbus(struct work_struct *ignored)
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+static void evm_deferred_drvvbus(struct work_struct *work)
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 {
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-	gpio_set_value_cansleep(GPIO_nVBUS_DRV, vbus_state);
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-	vbus_state = !vbus_state;
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+	struct davinci_glue *glue = container_of(work, struct davinci_glue,
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+						 vbus_work);
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+
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+	gpiod_set_value_cansleep(glue->vbus, glue->vbus_state);
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+	glue->vbus_state = !glue->vbus_state;
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 }
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-#endif	/* EVM */
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-
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-static void davinci_musb_source_power(struct musb *musb, int is_on, int immediate)
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+static void davinci_musb_source_power(struct musb *musb, int is_on,
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+				      int immediate)
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 {
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-#ifdef CONFIG_MACH_DAVINCI_EVM
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+	struct davinci_glue *glue = dev_get_drvdata(musb->controller->parent);
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+
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+	/* This GPIO handling is entirely optional */
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+	if (!glue->vbus)
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+		return;
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+
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 	if (is_on)
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 		is_on = 1;
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-	if (vbus_state == is_on)
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+	if (glue->vbus_state == is_on)
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 		return;
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-	vbus_state = !is_on;		/* 0/1 vs "-1 == unknown/init" */
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+	/* 0/1 vs "-1 == unknown/init" */
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+	glue->vbus_state = !is_on;
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 	if (machine_is_davinci_evm()) {
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-		static DECLARE_WORK(evm_vbus_work, evm_deferred_drvvbus);
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-
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 		if (immediate)
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-			gpio_set_value_cansleep(GPIO_nVBUS_DRV, vbus_state);
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+			gpiod_set_value_cansleep(glue->vbus, glue->vbus_state);
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 		else
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-			schedule_work(&evm_vbus_work);
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+			schedule_work(&glue->vbus_work);
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 	}
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 	if (immediate)
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-		vbus_state = is_on;
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-#endif
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+		glue->vbus_state = is_on;
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 }
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 static void davinci_musb_set_vbus(struct musb *musb, int is_on)
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@@ -524,6 +524,15 @@
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 	pdata->platform_ops		= &davinci_ops;
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+	glue->vbus = devm_gpiod_get_optional(&pdev->dev, NULL, GPIOD_OUT_LOW);
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+	if (IS_ERR(glue->vbus)) {
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+		ret = PTR_ERR(glue->vbus);
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+		goto err0;
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+	} else {
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+		glue->vbus_state = -1;
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+		INIT_WORK(&glue->vbus_work, evm_deferred_drvvbus);
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+	}
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+
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 	usb_phy_generic_register();
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 	platform_set_drvdata(pdev, glue);
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