diff options
Diffstat (limited to 'target/linux/gemini/patches-4.19/0013-usb-host-fotg2-add-silicon-clock-handling.patch')
| -rw-r--r-- | target/linux/gemini/patches-4.19/0013-usb-host-fotg2-add-silicon-clock-handling.patch | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/target/linux/gemini/patches-4.19/0013-usb-host-fotg2-add-silicon-clock-handling.patch b/target/linux/gemini/patches-4.19/0013-usb-host-fotg2-add-silicon-clock-handling.patch deleted file mode 100644 index 207a58d857..0000000000 --- a/target/linux/gemini/patches-4.19/0013-usb-host-fotg2-add-silicon-clock-handling.patch +++ /dev/null @@ -1,116 +0,0 @@ -From e76906e8e9dfaeeb22a37706aca493b86e4367bd Mon Sep 17 00:00:00 2001 -From: Linus Walleij <linus.walleij@linaro.org> -Date: Fri, 21 Apr 2017 20:46:12 +0200 -Subject: [PATCH 13/18] usb: host: fotg2: add silicon clock handling - -When used in a system with software-controlled silicon clocks, -the FOTG210 needs to grab, prepare and enable the clock. - -This is needed on for example the Cortina Gemini, where the -platform will by default gate off the clock unless the -peripheral (in this case the USB driver) grabs and enables -the clock. - -If there is no clock available on the platform, we live -without it. Make sure to percolate probe deferrals. - -Signed-off-by: Linus Walleij <linus.walleij@linaro.org> ---- -ChangeLog v1->v2: -- Handle probe deferrals on the clock controller, no matter - how unlikely they are. -- Send the patch to get Gemini USB rolling and try to get some - stuff upstream, this patch should be fine on its own. ---- - drivers/usb/host/fotg210-hcd.c | 33 +++++++++++++++++++++++++++++---- - drivers/usb/host/fotg210.h | 3 +++ - 2 files changed, 32 insertions(+), 4 deletions(-) - ---- a/drivers/usb/host/fotg210-hcd.c -+++ b/drivers/usb/host/fotg210-hcd.c -@@ -31,6 +31,7 @@ - #include <linux/uaccess.h> - #include <linux/platform_device.h> - #include <linux/io.h> -+#include <linux/clk.h> - - #include <asm/byteorder.h> - #include <asm/irq.h> -@@ -5600,7 +5601,7 @@ static int fotg210_hcd_probe(struct plat - hcd->regs = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(hcd->regs)) { - retval = PTR_ERR(hcd->regs); -- goto failed; -+ goto failed_put_hcd; - } - - hcd->rsrc_start = res->start; -@@ -5610,22 +5611,42 @@ static int fotg210_hcd_probe(struct plat - - fotg210->caps = hcd->regs; - -+ /* It's OK not to supply this clock */ -+ fotg210->pclk = clk_get(dev, "PCLK"); -+ if (!IS_ERR(fotg210->pclk)) { -+ retval = clk_prepare_enable(fotg210->pclk); -+ if (retval) { -+ dev_err(dev, "failed to enable PCLK\n"); -+ goto failed_put_hcd; -+ } -+ } else if (PTR_ERR(fotg210->pclk) == -EPROBE_DEFER) { -+ /* -+ * Percolate deferrals, for anything else, -+ * just live without the clocking. -+ */ -+ retval = PTR_ERR(fotg210->pclk); -+ goto failed_dis_clk; -+ } -+ - retval = fotg210_setup(hcd); - if (retval) -- goto failed; -+ goto failed_dis_clk; - - fotg210_init(fotg210); - - retval = usb_add_hcd(hcd, irq, IRQF_SHARED); - if (retval) { - dev_err(dev, "failed to add hcd with err %d\n", retval); -- goto failed; -+ goto failed_dis_clk; - } - device_wakeup_enable(hcd->self.controller); - - return retval; - --failed: -+failed_dis_clk: -+ if (!IS_ERR(fotg210->pclk)) -+ clk_disable_unprepare(fotg210->pclk); -+failed_put_hcd: - usb_put_hcd(hcd); - fail_create_hcd: - dev_err(dev, "init %s fail, %d\n", dev_name(dev), retval); -@@ -5641,6 +5662,10 @@ static int fotg210_hcd_remove(struct pla - { - struct device *dev = &pdev->dev; - struct usb_hcd *hcd = dev_get_drvdata(dev); -+ struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd); -+ -+ if (!IS_ERR(fotg210->pclk)) -+ clk_disable_unprepare(fotg210->pclk); - - if (!hcd) - return 0; ---- a/drivers/usb/host/fotg210.h -+++ b/drivers/usb/host/fotg210.h -@@ -182,6 +182,9 @@ struct fotg210_hcd { /* one per contro - # define COUNT(x) - #endif - -+ /* silicon clock */ -+ struct clk *pclk; -+ - /* debug files */ - struct dentry *debug_dir; - }; |