realtek: timer: Remove CEVT_RTL9300 completely

As the timer has been fixed now, we can drop the CEVT_RTL9300 timer all
together.

Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>

target/linux/realtek/files-5.15/arch/mips/kernel/cevt-rtl9300.c

@@ -1,204 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-
-#include <linux/clockchips.h>
-#include <linux/init.h>
-#include <asm/time.h>
-#include <asm/idle.h>
-#include <linux/interrupt.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/sched_clock.h>
-
-#include <mach-rtl83xx.h>
-
-/*
- * Timer registers
- * the RTL9300/9310 SoCs have 6 timers, each register block 0x10 apart
- */
-#define RTL9300_TC_DATA		0x0
-#define RTL9300_TC_CNT		0x4
-#define RTL9300_TC_CTRL		0x8
-#define RTL9300_TC_CTRL_MODE	BIT(24)
-#define RTL9300_TC_CTRL_EN	BIT(28)
-#define RTL9300_TC_INT		0xc
-#define RTL9300_TC_INT_IP	BIT(16)
-#define RTL9300_TC_INT_IE	BIT(20)
-
-/* Timer modes */
-#define TIMER_MODE_REPEAT	1
-#define TIMER_MODE_ONCE		0
-
-/* Minimum divider is 2 */
-#define DIVISOR_RTL9300		2
-
-#define N_BITS			28
-
-#define RTL9300_CLOCK_RATE	87500000
-
-struct rtl9300_clk_dev {
-	struct clock_event_device clkdev;
-	void __iomem *base;
-};
-
-static void __iomem *rtl9300_tc_base(struct clock_event_device *clk)
-{
-	struct rtl9300_clk_dev *rtl_clk = container_of(clk, struct rtl9300_clk_dev, clkdev);
-
-	return rtl_clk->base;
-}
-
-static irqreturn_t rtl9300_timer_interrupt(int irq, void *dev_id)
-{
-	struct rtl9300_clk_dev *rtl_clk = dev_id;
-	struct clock_event_device *clk = &rtl_clk->clkdev;
-
-	u32 v = readl(rtl_clk->base + RTL9300_TC_INT);
-
-	/* Acknowledge the IRQ */
-	v |= RTL9300_TC_INT_IP;
-	writel(v, rtl_clk->base + RTL9300_TC_INT);
-
-	clk->event_handler(clk);
-
-	return IRQ_HANDLED;
-}
-
-static void rtl9300_clock_stop(void __iomem *base)
-{
-	u32 v;
-
-	writel(0, base + RTL9300_TC_CTRL);
-
-	/* Acknowledge possibly pending IRQ */
-	v = readl(base + RTL9300_TC_INT);
-	writel(v | RTL9300_TC_INT_IP, base + RTL9300_TC_INT);
-}
-
-static void rtl9300_timer_start(void __iomem *base, bool periodic)
-{
-	u32 v = (periodic ? RTL9300_TC_CTRL_MODE : 0) | RTL9300_TC_CTRL_EN | DIVISOR_RTL9300;
-
-	writel(0, base + RTL9300_TC_CNT);
-	pr_debug("------------- starting timer base %08x\n", (u32)base);
-	writel(v, base + RTL9300_TC_CTRL);
-}
-
-static int rtl9300_next_event(unsigned long delta, struct clock_event_device *clk)
-{
-	void __iomem *base = rtl9300_tc_base(clk);
-
-	rtl9300_clock_stop(base);
-	writel(delta, base + RTL9300_TC_DATA);
-	rtl9300_timer_start(base, TIMER_MODE_ONCE);
-
-	return 0;
-}
-
-static int rtl9300_state_periodic(struct clock_event_device *clk)
-{
-	void __iomem *base = rtl9300_tc_base(clk);
-
-	pr_debug("------------- rtl9300_state_periodic %08x\n", (u32)base);
-	rtl9300_clock_stop(base);
-	writel(RTL9300_CLOCK_RATE / HZ, base + RTL9300_TC_DATA);
-	rtl9300_timer_start(base, TIMER_MODE_REPEAT);
-
-	return 0;
-}
-
-static int rtl9300_state_oneshot(struct clock_event_device *clk)
-{
-	void __iomem *base = rtl9300_tc_base(clk);
-
-	pr_debug("------------- rtl9300_state_oneshot %08x\n", (u32)base);
-	rtl9300_clock_stop(base);
-	writel(RTL9300_CLOCK_RATE / HZ, base + RTL9300_TC_DATA);
-	rtl9300_timer_start(base, TIMER_MODE_ONCE);
-
-	return 0;
-}
-
-static int rtl9300_shutdown(struct clock_event_device *clk)
-{
-	void __iomem *base = rtl9300_tc_base(clk);
-
-	pr_debug("------------- rtl9300_shutdown %08x\n", (u32)base);
-	rtl9300_clock_stop(base);
-
-	return 0;
-}
-
-static void rtl9300_clock_setup(void __iomem *base)
-{
-	u32 v;
-
-	/* Disable timer */
-	writel(0, base + RTL9300_TC_CTRL);
-
-	/* Acknowledge possibly pending IRQ */
-	v = readl(base + RTL9300_TC_INT);
-	writel(v | RTL9300_TC_INT_IP, base + RTL9300_TC_INT);
-
-	/* Setup maximum period (for use as clock-source) */
-	writel(0x0fffffff, base + RTL9300_TC_DATA);
-}
-
-static DEFINE_PER_CPU(struct rtl9300_clk_dev, rtl9300_clockevent);
-static DEFINE_PER_CPU(char [18], rtl9300_clock_name);
-
-void rtl9300_clockevent_init(void)
-{
-	int cpu = smp_processor_id();
-	int irq;
-	struct rtl9300_clk_dev *rtl_clk = &per_cpu(rtl9300_clockevent, cpu);
-	struct clock_event_device *cd = &rtl_clk->clkdev;
-	unsigned char *name = per_cpu(rtl9300_clock_name, cpu);
-	unsigned long flags =  IRQF_PERCPU | IRQF_TIMER;
-	struct device_node *node;
-
-	pr_info("%s called for cpu%d\n", __func__, cpu);
-	BUG_ON(cpu > 3);	/* Only have 4 general purpose timers */
-
-	node = of_find_compatible_node(NULL, NULL, "realtek,rtl9300clock");
-	if (!node) {
-		pr_err("No DT entry found for realtek,rtl9300clock\n");
-		return;
-	}
-
-	irq = irq_of_parse_and_map(node, cpu);
-	pr_info("%s using IRQ %d\n", __func__, irq);
-
-	rtl_clk->base = of_iomap(node, cpu);
-	if (!rtl_clk->base) {
-		pr_err("cannot map timer for cpu %d", cpu);
-		return;
-	}
-
-	rtl9300_clock_setup(rtl_clk->base);
-
-	sprintf(name, "rtl9300-counter-%d", cpu);
-	cd->name		= name;
-	cd->features		= CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
-
-	clockevent_set_clock(cd, RTL9300_CLOCK_RATE);
-
-	cd->max_delta_ns	= clockevent_delta2ns(0x0fffffff, cd);
-	cd->max_delta_ticks	= 0x0fffffff;
-	cd->min_delta_ns	= clockevent_delta2ns(0x20, cd);
-	cd->min_delta_ticks	= 0x20;
-	cd->rating		= 300;
-	cd->irq			= irq;
-	cd->cpumask		= cpumask_of(cpu);
-	cd->set_next_event	= rtl9300_next_event;
-	cd->set_state_shutdown	= rtl9300_shutdown;
-	cd->set_state_periodic	= rtl9300_state_periodic;
-	cd->set_state_oneshot	= rtl9300_state_oneshot;
-	clockevents_register_device(cd);
-
-	irq_set_affinity(irq, cd->cpumask);
-
-	if (request_irq(irq, rtl9300_timer_interrupt, flags, name, rtl_clk))
-		pr_err("Failed to request irq %d (%s)\n", irq, name);
-
-	writel(RTL9300_TC_INT_IE, rtl_clk->base + RTL9300_TC_INT);
-}

target/linux/realtek/patches-5.15/300-mips-add-rtl838x-platform.patch

@@ -84,13 +84,3 @@ Submitted-by: Birger Koblitz <git@birger-koblitz.de>
  source "arch/mips/alchemy/Kconfig"
  source "arch/mips/ath25/Kconfig"
  source "arch/mips/ath79/Kconfig"
-@@ -1112,6 +1162,9 @@ config CEVT_GT641XX
- config CEVT_R4K
- 	bool
- 
-+config CEVT_RTL9300
-+	bool
-+
- config CEVT_SB1250
- 	bool
- 

target/linux/realtek/patches-5.15/309-cevt-rtl9300-support.patch

@@ -1,54 +0,0 @@
-From 775d903216a08c2a8009863d2f9c33f62657ba94 Mon Sep 17 00:00:00 2001
-From: Birger Koblitz <git@birger-koblitz.de>
-Date: Thu, 6 Jan 2022 20:27:01 +0100
-Subject: [PATCH] realtek: Replace the RTL9300 generic timer with a CEVT timer
-
-The RTL9300 has a broken R4K MIPS timer interrupt, however, the
-R4K clocksource works. We replace the RTL9300 timer with a
-Clock Event Timer (CEVT), which is VSMP aware and can be instantiated
-as part of brining a VSMTP cpu up instead of the R4K CEVT source.
-For this we place the RTL9300 CEVT timer in arch/mips/kernel
-together with other MIPS CEVT timers, initialize the SoC IRQs
-from a modified smp-mt.c and instantiate each timer as part
-of the MIPS time setup in arch/mips/include/asm/time.h instead
-of the R4K CEVT, similarly as is done by other MIPS CEVT timers.
-
-Submitted-by: Birger Koblitz <git@birger-koblitz.de>
----
- arch/mips/kernel/Makefile                     | 1 +
- arch/mips/include/asm/time.h                  | 7 +++++++
- 2 files changed, 8 insertions(+)
-
---- a/arch/mips/kernel/Makefile
-+++ b/arch/mips/kernel/Makefile
-@@ -27,6 +27,7 @@ obj-$(CONFIG_CEVT_BCM1480)	+= cevt-bcm14
- obj-$(CONFIG_CEVT_R4K)		+= cevt-r4k.o
- obj-$(CONFIG_CEVT_DS1287)	+= cevt-ds1287.o
- obj-$(CONFIG_CEVT_GT641XX)	+= cevt-gt641xx.o
-+obj-$(CONFIG_CEVT_RTL9300)	+= cevt-rtl9300.o
- obj-$(CONFIG_CEVT_SB1250)	+= cevt-sb1250.o
- obj-$(CONFIG_CEVT_TXX9)		+= cevt-txx9.o
- obj-$(CONFIG_CSRC_BCM1480)	+= csrc-bcm1480.o
---- a/arch/mips/include/asm/time.h
-+++ b/arch/mips/include/asm/time.h
-@@ -15,6 +15,8 @@
- #include <linux/clockchips.h>
- #include <linux/clocksource.h>
- 
-+extern void rtl9300_clockevent_init(void);
-+
- extern spinlock_t rtc_lock;
- 
- /*
-@@ -43,6 +45,11 @@ extern int r4k_clockevent_init(void);
- 
- static inline int mips_clockevent_init(void)
- {
-+#ifdef CONFIG_CEVT_RTL9300
-+	rtl9300_clockevent_init();
-+	return 0;
-+#endif
-+
- #ifdef CONFIG_CEVT_R4K
- 	return r4k_clockevent_init();
- #else