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Message-Id: <1476323086-29478-1-git-send-email-david@lechnology.com>
Date: Wed, 12 Oct 2016 20:44:46 -0500
From: David Lechner <david@...hnology.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Alan Stern <stern@...land.harvard.edu>
Cc: David Lechner <david@...hnology.com>, linux-usb@...r.kernel.org,
linux-kernel@...r.kernel.org, Kevin Hilman <khilman@...nel.org>,
Sekhar Nori <nsekhar@...com>, Bin Liu <b-liu@...com>,
Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
Kishon Vijay Abraham I <kishon@...com>
Subject: [PATCH] usb: ohci-da8xx: Remove code that references mach
Including mach/* is frowned upon in device drivers, so get rid of it.
This replaces usb20_clk and code that pokes CFGCHIP2 with a proper phy
driver.
Signed-off-by: David Lechner <david@...hnology.com>
Acked-by: Alan Stern <stern@...land.harvard.edu>
---
Greg,
This is a resend of the last patch from the "[PATCH v6 0/3] da8xx USB PHY
platform devices and clocks" series so you can "pick it up after 4.9-rc1 is
out."
re: http://lkml.iu.edu/hypermail/linux/kernel/1610.0/01153.html
drivers/usb/host/Kconfig | 1 +
drivers/usb/host/ohci-da8xx.c | 102 +++++++++++++++++++++++-------------------
2 files changed, 56 insertions(+), 47 deletions(-)
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 2e710a4..1f0cdab8 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -482,6 +482,7 @@ config USB_OHCI_HCD_DAVINCI
bool "OHCI support for TI DaVinci DA8xx"
depends on ARCH_DAVINCI_DA8XX
depends on USB_OHCI_HCD=y
+ select PHY_DA8XX_USB
default y
help
Enables support for the DaVinci DA8xx integrated OHCI
diff --git a/drivers/usb/host/ohci-da8xx.c b/drivers/usb/host/ohci-da8xx.c
index e5c33bc..3656d7c 100644
--- a/drivers/usb/host/ohci-da8xx.c
+++ b/drivers/usb/host/ohci-da8xx.c
@@ -15,58 +15,50 @@
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
-
-#include <mach/da8xx.h>
+#include <linux/phy/phy.h>
#include <linux/platform_data/usb-davinci.h>
#ifndef CONFIG_ARCH_DAVINCI_DA8XX
#error "This file is DA8xx bus glue. Define CONFIG_ARCH_DAVINCI_DA8XX."
#endif
-#define CFGCHIP2 DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)
-
static struct clk *usb11_clk;
-static struct clk *usb20_clk;
+static struct phy *usb11_phy;
/* Over-current indicator change bitmask */
static volatile u16 ocic_mask;
-static void ohci_da8xx_clock(int on)
+static int ohci_da8xx_enable(void)
{
- u32 cfgchip2;
-
- cfgchip2 = __raw_readl(CFGCHIP2);
- if (on) {
- clk_enable(usb11_clk);
-
- /*
- * If USB 1.1 reference clock is sourced from USB 2.0 PHY, we
- * need to enable the USB 2.0 module clocking, start its PHY,
- * and not allow it to stop the clock during USB 2.0 suspend.
- */
- if (!(cfgchip2 & CFGCHIP2_USB1PHYCLKMUX)) {
- clk_enable(usb20_clk);
-
- cfgchip2 &= ~(CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN);
- cfgchip2 |= CFGCHIP2_PHY_PLLON;
- __raw_writel(cfgchip2, CFGCHIP2);
-
- pr_info("Waiting for USB PHY clock good...\n");
- while (!(__raw_readl(CFGCHIP2) & CFGCHIP2_PHYCLKGD))
- cpu_relax();
- }
+ int ret;
- /* Enable USB 1.1 PHY */
- cfgchip2 |= CFGCHIP2_USB1SUSPENDM;
- } else {
- clk_disable(usb11_clk);
- if (!(cfgchip2 & CFGCHIP2_USB1PHYCLKMUX))
- clk_disable(usb20_clk);
+ ret = clk_prepare_enable(usb11_clk);
+ if (ret)
+ return ret;
- /* Disable USB 1.1 PHY */
- cfgchip2 &= ~CFGCHIP2_USB1SUSPENDM;
- }
- __raw_writel(cfgchip2, CFGCHIP2);
+ ret = phy_init(usb11_phy);
+ if (ret)
+ goto err_phy_init;
+
+ ret = phy_power_on(usb11_phy);
+ if (ret)
+ goto err_phy_power_on;
+
+ return 0;
+
+err_phy_power_on:
+ phy_exit(usb11_phy);
+err_phy_init:
+ clk_disable_unprepare(usb11_clk);
+
+ return ret;
+}
+
+static void ohci_da8xx_disable(void)
+{
+ phy_power_off(usb11_phy);
+ phy_exit(usb11_phy);
+ clk_disable_unprepare(usb11_clk);
}
/*
@@ -92,7 +84,9 @@ static int ohci_da8xx_init(struct usb_hcd *hcd)
dev_dbg(dev, "starting USB controller\n");
- ohci_da8xx_clock(1);
+ result = ohci_da8xx_enable();
+ if (result < 0)
+ return result;
/*
* DA8xx only have 1 port connected to the pins but the HC root hub
@@ -101,8 +95,10 @@ static int ohci_da8xx_init(struct usb_hcd *hcd)
ohci->num_ports = 1;
result = ohci_init(ohci);
- if (result < 0)
+ if (result < 0) {
+ ohci_da8xx_disable();
return result;
+ }
/*
* Since we're providing a board-specific root hub port power control
@@ -129,7 +125,7 @@ static int ohci_da8xx_init(struct usb_hcd *hcd)
static void ohci_da8xx_stop(struct usb_hcd *hcd)
{
ohci_stop(hcd);
- ohci_da8xx_clock(0);
+ ohci_da8xx_disable();
}
static int ohci_da8xx_start(struct usb_hcd *hcd)
@@ -301,12 +297,18 @@ static int usb_hcd_da8xx_probe(const struct hc_driver *driver,
return -ENODEV;
usb11_clk = devm_clk_get(&pdev->dev, "usb11");
- if (IS_ERR(usb11_clk))
+ if (IS_ERR(usb11_clk)) {
+ if (PTR_ERR(usb11_clk) != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "Failed to get clock.\n");
return PTR_ERR(usb11_clk);
+ }
- usb20_clk = devm_clk_get(&pdev->dev, "usb20");
- if (IS_ERR(usb20_clk))
- return PTR_ERR(usb20_clk);
+ usb11_phy = devm_phy_get(&pdev->dev, "usb-phy");
+ if (IS_ERR(usb11_phy)) {
+ if (PTR_ERR(usb11_phy) != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "Failed to get phy.\n");
+ return PTR_ERR(usb11_phy);
+ }
hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
if (!hcd)
@@ -316,6 +318,7 @@ static int usb_hcd_da8xx_probe(const struct hc_driver *driver,
hcd->regs = devm_ioremap_resource(&pdev->dev, mem);
if (IS_ERR(hcd->regs)) {
error = PTR_ERR(hcd->regs);
+ dev_err(&pdev->dev, "failed to map ohci.\n");
goto err;
}
hcd->rsrc_start = mem->start;
@@ -397,7 +400,7 @@ static int ohci_da8xx_suspend(struct platform_device *pdev,
if (ret)
return ret;
- ohci_da8xx_clock(0);
+ ohci_da8xx_disable();
hcd->state = HC_STATE_SUSPENDED;
return ret;
@@ -407,14 +410,19 @@ static int ohci_da8xx_resume(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ int ret;
if (time_before(jiffies, ohci->next_statechange))
msleep(5);
ohci->next_statechange = jiffies;
- ohci_da8xx_clock(1);
+ ret = ohci_da8xx_enable();
+ if (ret)
+ return ret;
+
dev->dev.power.power_state = PMSG_ON;
usb_hcd_resume_root_hub(hcd);
+
return 0;
}
#endif
--
2.7.4
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