From cc4ee2eeb465c1f4404b91852e6c86a43923c55e Mon Sep 17 00:00:00 2001 From: Adrian Schmutzler Date: Sat, 6 Mar 2021 11:23:38 +0100 Subject: 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 --- ...312-MIPS-ralink-add-cpu-frequency-scaling.patch | 195 --------------------- 1 file changed, 195 deletions(-) delete mode 100644 target/linux/ramips/patches-5.10/312-MIPS-ralink-add-cpu-frequency-scaling.patch (limited to 'target/linux/ramips/patches-5.10/312-MIPS-ralink-add-cpu-frequency-scaling.patch') 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 -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 ---- - 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); -- cgit v1.2.3