Merge tag 'timers-v6.3-rc1' of https://git.linaro.org/people/daniel.lezcano/linux into timers/core

Pull clocksource/event changes from Daniel Lezcano:

   - Add rktimer for rv1126 Rockchip based board (Jagan Teki)

   - Initialize hrtimer based broadcast clock event device on RISC-V
     before C3STOP can be used (Conor Dooley)

   - Add DT binding for RISC-V timer and add the C3STOP flag if the DT
     tells the timer can not wake up the CPU (Anup Patel)

   - Increase the RISC-V timer rating as it is more efficient than mmio
     timers (Samuel Holland)

   - Drop obsolete dependency on COMPILE_TEST on microchip-pit64b as the
     OF is already depending on it (Jean Delvare)

   - Mark sh_cmt, sh_tmu, em_sti drivers as non-removable (Uwe
     Kleine-König)

   - Add binding description for mediatek,mt8365-systimer (Bernhard
     Rosenkränzer)

   - Add compatibles for T-Head's C9xx (Icenowy Zheng)

   - Restrict the microchip-pit64b compilation to the ARM architecture
     and add the delay timer (Claudiu Beznea)

   - Set the static key to select the SBI or Sstc timer sooner to prevent
     the first call to use the SBI while Sstc must be used (Matt Evans)

   - Add the CLOCK_EVT_FEAT_DYNIRQ flag to optimize the timer wake up on
     the sun4i platform (Yangtao Li)

Link: https://lore.kernel/org/r/b7d1d982-d717-2930-b353-19b92cbe390f@linaro.org

Author: KAGA-KOKO

Documentation/devicetree/bindings/timer/mediatek,mtk-timer.txt

@@ -33,6 +33,7 @@ Required properties:
 
 	For those SoCs that use CPUX
 	* "mediatek,mt6795-systimer" for MT6795 compatible timers (CPUX)
+	* "mediatek,mt8365-systimer" for MT8365 compatible timers (CPUX)
 
 - reg: Should contain location and length for timer register.
 - clocks: Should contain system clock.

Documentation/devicetree/bindings/timer/riscv,timer.yaml

@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/riscv,timer.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: RISC-V timer
+
+maintainers:
+  - Anup Patel <anup@brainfault.org>
+
+description: |+
+  RISC-V platforms always have a RISC-V timer device for the supervisor-mode
+  based on the time CSR defined by the RISC-V privileged specification. The
+  timer interrupts of this device are configured using the RISC-V SBI Time
+  extension or the RISC-V Sstc extension.
+
+  The clock frequency of RISC-V timer device is specified via the
+  "timebase-frequency" DT property of "/cpus" DT node which is described
+  in Documentation/devicetree/bindings/riscv/cpus.yaml
+
+properties:
+  compatible:
+    enum:
+      - riscv,timer
+
+  interrupts-extended:
+    minItems: 1
+    maxItems: 4096   # Should be enough?
+
+  riscv,timer-cannot-wake-cpu:
+    type: boolean
+    description:
+      If present, the timer interrupt cannot wake up the CPU from one or
+      more suspend/idle states.
+
+additionalProperties: false
+
+required:
+  - compatible
+  - interrupts-extended
+
+examples:
+  - |
+    timer {
+      compatible = "riscv,timer";
+      interrupts-extended = <&cpu1intc 5>,
+                            <&cpu2intc 5>,
+                            <&cpu3intc 5>,
+                            <&cpu4intc 5>;
+    };
+...

Documentation/devicetree/bindings/timer/rockchip,rk-timer.yaml

@@ -17,6 +17,7 @@ properties:
       - items:
           - enum:
               - rockchip,rv1108-timer
+              - rockchip,rv1126-timer
               - rockchip,rk3036-timer
               - rockchip,rk3128-timer
               - rockchip,rk3188-timer

Documentation/devicetree/bindings/timer/sifive,clint.yaml

@@ -20,6 +20,10 @@ description:
   property of "/cpus" DT node. The "timebase-frequency" DT property is
   described in Documentation/devicetree/bindings/riscv/cpus.yaml
 
+  T-Head C906/C910 CPU cores include an implementation of CLINT too, however
+  their implementation lacks a memory-mapped MTIME register, thus not
+  compatible with SiFive ones.
+
 properties:
   compatible:
     oneOf:
@@ -29,6 +33,10 @@ properties:
               - starfive,jh7100-clint
               - canaan,k210-clint
           - const: sifive,clint0
+      - items:
+          - enum:
+              - allwinner,sun20i-d1-clint
+          - const: thead,c900-clint
       - items:
           - const: sifive,clint0
           - const: riscv,clint0

arch/riscv/Kconfig

@@ -12,7 +12,6 @@ config 32BIT
 
 config RISCV
 	def_bool y
-	select ARCH_CLOCKSOURCE_INIT
 	select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
 	select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
 	select ARCH_HAS_BINFMT_FLAT

arch/riscv/kernel/time.c

@@ -5,6 +5,7 @@
  */
 
 #include <linux/of_clk.h>
+#include <linux/clockchips.h>
 #include <linux/clocksource.h>
 #include <linux/delay.h>
 #include <asm/sbi.h>
@@ -29,13 +30,6 @@ void __init time_init(void)
 
 	of_clk_init(NULL);
 	timer_probe();
-}
 
-void clocksource_arch_init(struct clocksource *cs)
-{
-#ifdef CONFIG_GENERIC_GETTIMEOFDAY
-	cs->vdso_clock_mode = VDSO_CLOCKMODE_ARCHTIMER;
-#else
-	cs->vdso_clock_mode = VDSO_CLOCKMODE_NONE;
-#endif
+	tick_setup_hrtimer_broadcast();
 }

drivers/clocksource/Kconfig

@@ -706,7 +706,7 @@ config INGENIC_OST
 
 config MICROCHIP_PIT64B
 	bool "Microchip PIT64B support"
-	depends on OF || COMPILE_TEST
+	depends on OF && ARM
 	select TIMER_OF
 	help
 	  This option enables Microchip PIT64B timer for Atmel

drivers/clocksource/em_sti.c

@@ -333,11 +333,6 @@ static int em_sti_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int em_sti_remove(struct platform_device *pdev)
-{
-	return -EBUSY; /* cannot unregister clockevent and clocksource */
-}
-
 static const struct of_device_id em_sti_dt_ids[] = {
 	{ .compatible = "renesas,em-sti", },
 	{},
@@ -346,10 +341,10 @@ MODULE_DEVICE_TABLE(of, em_sti_dt_ids);
 
 static struct platform_driver em_sti_device_driver = {
 	.probe		= em_sti_probe,
-	.remove		= em_sti_remove,
 	.driver		= {
 		.name	= "em_sti",
 		.of_match_table = em_sti_dt_ids,
+		.suppress_bind_attrs = true,
 	}
 };
 

drivers/clocksource/sh_cmt.c

@@ -1145,17 +1145,12 @@ static int sh_cmt_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int sh_cmt_remove(struct platform_device *pdev)
-{
-	return -EBUSY; /* cannot unregister clockevent and clocksource */
-}
-
 static struct platform_driver sh_cmt_device_driver = {
 	.probe		= sh_cmt_probe,
-	.remove		= sh_cmt_remove,
 	.driver		= {
 		.name	= "sh_cmt",
 		.of_match_table = of_match_ptr(sh_cmt_of_table),
+		.suppress_bind_attrs = true,
 	},
 	.id_table	= sh_cmt_id_table,
 };

drivers/clocksource/sh_tmu.c

@@ -632,11 +632,6 @@ static int sh_tmu_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int sh_tmu_remove(struct platform_device *pdev)
-{
-	return -EBUSY; /* cannot unregister clockevent and clocksource */
-}
-
 static const struct platform_device_id sh_tmu_id_table[] = {
 	{ "sh-tmu", SH_TMU },
 	{ "sh-tmu-sh3", SH_TMU_SH3 },
@@ -652,10 +647,10 @@ MODULE_DEVICE_TABLE(of, sh_tmu_of_table);
 
 static struct platform_driver sh_tmu_device_driver = {
 	.probe		= sh_tmu_probe,
-	.remove		= sh_tmu_remove,
 	.driver		= {
 		.name	= "sh_tmu",
 		.of_match_table = of_match_ptr(sh_tmu_of_table),
+		.suppress_bind_attrs = true,
 	},
 	.id_table	= sh_tmu_id_table,
 };