Revert "ramips: add support for kernel 5.10"

This reverts commit b4aad29a1d7ad77d67073c1c54b28c429c64ed9b.

This was accidentally folded into a single commit. Remove it and
apply it properly again.

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

1 files changed, 0 insertions, 195 deletions

diff --git a/target/linux/ramips/patches-5.10/312-MIPS-ralink-add-cpu-frequency-scaling.patch b/target/linux/ramips/patches-5.10/312-MIPS-ralink-add-cpu-frequency-scaling.patch
deleted file mode 100644
index 0d70770941..0000000000
--- a/target/linux/ramips/patches-5.10/312-MIPS-ralink-add-cpu-frequency-scaling.patch
+++ /dev/null
@@ -1,195 +0,0 @@
-From bd30f19a006fb52bac80c6463c49dd2f4159f4ac Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Sun, 28 Jul 2013 16:26:41 +0200
-Subject: [PATCH 06/53] MIPS: ralink: add cpu frequency scaling
-
-This feature will break udelay() and cause the delay loop to have longer delays
-when the frequency is scaled causing a performance hit.
-
-Signed-off-by: John Crispin <blogic@openwrt.org>
----
- arch/mips/ralink/cevt-rt3352.c |   38 ++++++++++++++++++++++++++++++++++++++
- 1 file changed, 38 insertions(+)
-
---- a/arch/mips/ralink/cevt-rt3352.c
-+++ b/arch/mips/ralink/cevt-rt3352.c
-@@ -29,6 +29,10 @@
- /* enable the counter */
- #define CFG_CNT_EN		0x1
- 
-+/* mt7620 frequency scaling defines */
-+#define CLK_LUT_CFG	0x40
-+#define SLEEP_EN	BIT(31)
-+
- struct systick_device {
- 	void __iomem *membase;
- 	struct clock_event_device dev;
-@@ -36,21 +40,53 @@ struct systick_device {
- 	int freq_scale;
- };
- 
-+static void (*systick_freq_scaling)(struct systick_device *sdev, int status);
-+
- static int systick_set_oneshot(struct clock_event_device *evt);
- static int systick_shutdown(struct clock_event_device *evt);
- 
-+static inline void mt7620_freq_scaling(struct systick_device *sdev, int status)
-+{
-+	if (sdev->freq_scale == status)
-+		return;
-+
-+	sdev->freq_scale = status;
-+
-+	pr_info("%s: %s autosleep mode\n", sdev->dev.name,
-+			(status) ? ("enable") : ("disable"));
-+	if (status)
-+		rt_sysc_w32(rt_sysc_r32(CLK_LUT_CFG) | SLEEP_EN, CLK_LUT_CFG);
-+	else
-+		rt_sysc_w32(rt_sysc_r32(CLK_LUT_CFG) & ~SLEEP_EN, CLK_LUT_CFG);
-+}
-+
-+static inline unsigned int read_count(struct systick_device *sdev)
-+{
-+	return ioread32(sdev->membase + SYSTICK_COUNT);
-+}
-+
-+static inline unsigned int read_compare(struct systick_device *sdev)
-+{
-+	return ioread32(sdev->membase + SYSTICK_COMPARE);
-+}
-+
-+static inline void write_compare(struct systick_device *sdev, unsigned int val)
-+{
-+	iowrite32(val, sdev->membase + SYSTICK_COMPARE);
-+}
-+
- static int systick_next_event(unsigned long delta,
- 				struct clock_event_device *evt)
- {
- 	struct systick_device *sdev;
--	u32 count;
-+	int res;
- 
- 	sdev = container_of(evt, struct systick_device, dev);
--	count = ioread32(sdev->membase + SYSTICK_COUNT);
--	count = (count + delta) % SYSTICK_FREQ;
--	iowrite32(count, sdev->membase + SYSTICK_COMPARE);
-+	delta += read_count(sdev);
-+	write_compare(sdev, delta);
-+	res = ((int)(read_count(sdev) - delta) >= 0) ? -ETIME : 0;
- 
--	return 0;
-+	return res;
- }
- 
- static void systick_event_handler(struct clock_event_device *dev)
-@@ -60,20 +96,25 @@ static void systick_event_handler(struct
- 
- static irqreturn_t systick_interrupt(int irq, void *dev_id)
- {
--	struct clock_event_device *dev = (struct clock_event_device *) dev_id;
-+	int ret = 0;
-+	struct clock_event_device *cdev;
-+	struct systick_device *sdev;
- 
--	dev->event_handler(dev);
-+	if (read_c0_cause() & STATUSF_IP7) {
-+		cdev = (struct clock_event_device *) dev_id;
-+		sdev = container_of(cdev, struct systick_device, dev);
-+
-+		/* Clear Count/Compare Interrupt */
-+		write_compare(sdev, read_compare(sdev));
-+		cdev->event_handler(cdev);
-+		ret = 1;
-+	}
- 
--	return IRQ_HANDLED;
-+	return IRQ_RETVAL(ret);
- }
- 
- static struct systick_device systick = {
- 	.dev = {
--		/*
--		 * cevt-r4k uses 300, make sure systick
--		 * gets used if available
--		 */
--		.rating			= 310,
- 		.features		= CLOCK_EVT_FEAT_ONESHOT,
- 		.set_next_event		= systick_next_event,
- 		.set_state_shutdown	= systick_shutdown,
-@@ -91,7 +132,13 @@ static int systick_shutdown(struct clock
- 	if (sdev->irq_requested)
- 		free_irq(systick.dev.irq, &systick.dev);
- 	sdev->irq_requested = 0;
--	iowrite32(0, systick.membase + SYSTICK_CONFIG);
-+	iowrite32(CFG_CNT_EN, systick.membase + SYSTICK_CONFIG);
-+
-+	if (systick_freq_scaling)
-+		systick_freq_scaling(sdev, 0);
-+
-+	if (systick_freq_scaling)
-+		systick_freq_scaling(sdev, 1);
- 
- 	return 0;
- }
-@@ -116,33 +163,46 @@ static int systick_set_oneshot(struct cl
- 	return 0;
- }
- 
-+static const struct of_device_id systick_match[] = {
-+	{ .compatible = "ralink,mt7620a-systick", .data = mt7620_freq_scaling},
-+	{},
-+};
-+
- static int __init ralink_systick_init(struct device_node *np)
- {
--	int ret;
-+	const struct of_device_id *match;
-+	int rating = 200;
- 
- 	systick.membase = of_iomap(np, 0);
- 	if (!systick.membase)
- 		return -ENXIO;
- 
--	systick.dev.name = np->name;
--	clockevents_calc_mult_shift(&systick.dev, SYSTICK_FREQ, 60);
--	systick.dev.max_delta_ns = clockevent_delta2ns(0x7fff, &systick.dev);
--	systick.dev.max_delta_ticks = 0x7fff;
--	systick.dev.min_delta_ns = clockevent_delta2ns(0x3, &systick.dev);
--	systick.dev.min_delta_ticks = 0x3;
-+	match = of_match_node(systick_match, np);
-+	if (match) {
-+		systick_freq_scaling = match->data;
-+		/*
-+		 * cevt-r4k uses 300, make sure systick
-+		 * gets used if available
-+		 */
-+		rating = 310;
-+	}
-+
-+	/* enable counter than register clock source */
-+	iowrite32(CFG_CNT_EN, systick.membase + SYSTICK_CONFIG);
-+	clocksource_mmio_init(systick.membase + SYSTICK_COUNT, np->name,
-+			SYSTICK_FREQ, rating, 16, clocksource_mmio_readl_up);
-+
-+	/* register clock event */
- 	systick.dev.irq = irq_of_parse_and_map(np, 0);
- 	if (!systick.dev.irq) {
- 		pr_err("%pOFn: request_irq failed", np);
- 		return -EINVAL;
- 	}
- 
--	ret = clocksource_mmio_init(systick.membase + SYSTICK_COUNT, np->name,
--				    SYSTICK_FREQ, 301, 16,
--				    clocksource_mmio_readl_up);
--	if (ret)
--		return ret;
--
--	clockevents_register_device(&systick.dev);
-+	systick.dev.name = np->name;
-+	systick.dev.rating = rating;
-+	systick.dev.cpumask = cpumask_of(0);
-+	clockevents_config_and_register(&systick.dev, SYSTICK_FREQ, 0x3, 0x7fff);
- 
- 	pr_info("%pOFn: running - mult: %d, shift: %d\n",
- 			np, systick.dev.mult, systick.dev.shift);