kernel: remove support for kernel 4.19

We use 5.4 on all targets by default, and 4.19 has never been released
in a stable version. There is no reason to keep it.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

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;
- };