Merge tag 'timers-v5.17-rc1' of https://git.linaro.org/people/daniel.lezcano/linux into timers/core
Pull clocksource/events updates from Daniel Lezcano:
- Refactor resource allocation on the Exynos_mct driver without
functional changes (Marek Szyprowski)
- Add imx8ulp compatible string for NPX TPM driver (Jacky Bai)
- Fix comma introduced by error by replacing it by the initial
semicolon on the Exynos_mct (Will Deacon)
- Add OSTM driver support on Renesas. The reset line must be
deasserted before accessing the registers. This change depends on an
external change resulting in a shared immutable branch
'reset/of-get-optional-exclusive' from
git://git.pengutronix.de/pza/linux (Biju Das)
- Make the OSTM Kconfig option visible to user in order to let him
disable it when ARM architected timers is enabled (Biju Das)
- Tag two variables on iMX sysctr _ro_afterinit (Peng Fan)
- Set the cpumask to cpu_possible_mask in order to have full benefit
of the DYNIRQ flag on iMX sysctr (Peng Fan)
- Tag __maybe_unused a variable in the Pistachio timer driver in order
to fix a warning reported by the kernel test robot (Drew Fustini)
- Add MStar MSC313e timer support and the ssd20xd-based variant, as
well as the DT bindings (Romain Perier)
- Remove the incompatible compatible string for the rk3066 (Johan
Jonker)
- Fix dts_check warnings on the cadence ttc driver by adding the power
domain bindings (Michal Simek)
Link: https://lore.kernel.org/lkml/e093c706-c98d-29ee-0102-78b6d41c6164@linaro.org
diff --git a/Documentation/devicetree/bindings/timer/cdns,ttc.yaml b/Documentation/devicetree/bindings/timer/cdns,ttc.yaml
index 8615353..c338607 100644
--- a/Documentation/devicetree/bindings/timer/cdns,ttc.yaml
+++ b/Documentation/devicetree/bindings/timer/cdns,ttc.yaml
@@ -25,6 +25,9 @@
clocks:
maxItems: 1
+ power-domains:
+ maxItems: 1
+
timer-width:
$ref: "/schemas/types.yaml#/definitions/uint32"
description: |
diff --git a/Documentation/devicetree/bindings/timer/mstar,msc313e-timer.yaml b/Documentation/devicetree/bindings/timer/mstar,msc313e-timer.yaml
new file mode 100644
index 0000000..03d5dba
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/mstar,msc313e-timer.yaml
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/mstar,msc313e-timer.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mstar MSC313e Timer Device Tree Bindings
+
+maintainers:
+ - Daniel Palmer <daniel@0x0f.com>
+ - Romain Perier <romain.perier@gmail.com>
+
+properties:
+ compatible:
+ enum:
+ - mstar,msc313e-timer
+ - sstar,ssd20xd-timer
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ timer@6040 {
+ compatible = "mstar,msc313e-timer";
+ reg = <0x6040 0x40>;
+ clocks = <&xtal_div2>;
+ interrupts-extended = <&intc_fiq GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
+ };
+...
diff --git a/Documentation/devicetree/bindings/timer/nxp,tpm-timer.yaml b/Documentation/devicetree/bindings/timer/nxp,tpm-timer.yaml
index edd9585..f69773a 100644
--- a/Documentation/devicetree/bindings/timer/nxp,tpm-timer.yaml
+++ b/Documentation/devicetree/bindings/timer/nxp,tpm-timer.yaml
@@ -19,7 +19,11 @@
properties:
compatible:
- const: fsl,imx7ulp-tpm
+ oneOf:
+ - const: fsl,imx7ulp-tpm
+ - items:
+ - const: fsl,imx8ulp-tpm
+ - const: fsl,imx7ulp-tpm
reg:
maxItems: 1
diff --git a/Documentation/devicetree/bindings/timer/renesas,ostm.yaml b/Documentation/devicetree/bindings/timer/renesas,ostm.yaml
index 600d47a..7fa7f97 100644
--- a/Documentation/devicetree/bindings/timer/renesas,ostm.yaml
+++ b/Documentation/devicetree/bindings/timer/renesas,ostm.yaml
@@ -21,9 +21,10 @@
compatible:
items:
- enum:
- - renesas,r7s72100-ostm # RZ/A1H
- - renesas,r7s9210-ostm # RZ/A2M
- - const: renesas,ostm # Generic
+ - renesas,r7s72100-ostm # RZ/A1H
+ - renesas,r7s9210-ostm # RZ/A2M
+ - renesas,r9a07g044-ostm # RZ/G2{L,LC}
+ - const: renesas,ostm # Generic
reg:
maxItems: 1
@@ -37,6 +38,9 @@
power-domains:
maxItems: 1
+ resets:
+ maxItems: 1
+
required:
- compatible
- reg
@@ -44,6 +48,16 @@
- clocks
- power-domains
+if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - renesas,r9a07g044-ostm
+then:
+ required:
+ - resets
+
additionalProperties: false
examples:
diff --git a/Documentation/devicetree/bindings/timer/rockchip,rk-timer.yaml b/Documentation/devicetree/bindings/timer/rockchip,rk-timer.yaml
index e26ecb5..5d157d8 100644
--- a/Documentation/devicetree/bindings/timer/rockchip,rk-timer.yaml
+++ b/Documentation/devicetree/bindings/timer/rockchip,rk-timer.yaml
@@ -18,7 +18,6 @@
- enum:
- rockchip,rv1108-timer
- rockchip,rk3036-timer
- - rockchip,rk3066-timer
- rockchip,rk3188-timer
- rockchip,rk3228-timer
- rockchip,rk3229-timer
diff --git a/MAINTAINERS b/MAINTAINERS
index 13f9a84..45c1436 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2291,6 +2291,7 @@
F: arch/arm/boot/dts/mstar-*
F: arch/arm/mach-mstar/
F: drivers/clk/mstar/
+F: drivers/clocksource/timer-msc313e.c
F: drivers/gpio/gpio-msc313.c
F: drivers/rtc/rtc-msc313.c
F: drivers/watchdog/msc313e_wdt.c
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index f65e31b..cfb8ea0 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -510,7 +510,8 @@
This hardware comes with 16-bit timer registers.
config RENESAS_OSTM
- bool "Renesas OSTM timer driver" if COMPILE_TEST
+ bool "Renesas OSTM timer driver"
+ depends on ARCH_RENESAS || COMPILE_TEST
select CLKSRC_MMIO
select TIMER_OF
help
@@ -671,6 +672,15 @@
help
Enables the support for Milbeaut timer driver.
+config MSC313E_TIMER
+ bool "MSC313E timer driver" if COMPILE_TEST
+ select TIMER_OF
+ select CLKSRC_MMIO
+ help
+ Enables support for the MStar MSC313E timer driver.
+ This provides access to multiple interrupt generating
+ programmable 32-bit free running incrementing counters.
+
config INGENIC_TIMER
bool "Clocksource/timer using the TCU in Ingenic JZ SoCs"
default MACH_INGENIC
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index c17ee32..fa5f624 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -88,3 +88,4 @@
obj-$(CONFIG_GX6605S_TIMER) += timer-gx6605s.o
obj-$(CONFIG_HYPERV_TIMER) += hyperv_timer.o
obj-$(CONFIG_MICROCHIP_PIT64B) += timer-microchip-pit64b.o
+obj-$(CONFIG_MSC313E_TIMER) += timer-msc313e.o
diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
index 5e3e96d..6db3d551 100644
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -467,7 +467,7 @@ static int exynos4_mct_starting_cpu(unsigned int cpu)
evt->tick_resume = set_state_shutdown;
evt->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT |
CLOCK_EVT_FEAT_PERCPU;
- evt->rating = MCT_CLKEVENTS_RATING,
+ evt->rating = MCT_CLKEVENTS_RATING;
exynos4_mct_write(TICK_BASE_CNT, mevt->base + MCT_L_TCNTB_OFFSET);
@@ -504,11 +504,14 @@ static int exynos4_mct_dying_cpu(unsigned int cpu)
return 0;
}
-static int __init exynos4_timer_resources(struct device_node *np, void __iomem *base)
+static int __init exynos4_timer_resources(struct device_node *np)
{
- int err, cpu;
struct clk *mct_clk, *tick_clk;
+ reg_base = of_iomap(np, 0);
+ if (!reg_base)
+ panic("%s: unable to ioremap mct address space\n", __func__);
+
tick_clk = of_clk_get_by_name(np, "fin_pll");
if (IS_ERR(tick_clk))
panic("%s: unable to determine tick clock rate\n", __func__);
@@ -519,9 +522,27 @@ static int __init exynos4_timer_resources(struct device_node *np, void __iomem *
panic("%s: unable to retrieve mct clock instance\n", __func__);
clk_prepare_enable(mct_clk);
- reg_base = base;
- if (!reg_base)
- panic("%s: unable to ioremap mct address space\n", __func__);
+ return 0;
+}
+
+static int __init exynos4_timer_interrupts(struct device_node *np,
+ unsigned int int_type)
+{
+ int nr_irqs, i, err, cpu;
+
+ mct_int_type = int_type;
+
+ /* This driver uses only one global timer interrupt */
+ mct_irqs[MCT_G0_IRQ] = irq_of_parse_and_map(np, MCT_G0_IRQ);
+
+ /*
+ * Find out the number of local irqs specified. The local
+ * timer irqs are specified after the four global timer
+ * irqs are specified.
+ */
+ nr_irqs = of_irq_count(np);
+ for (i = MCT_L0_IRQ; i < nr_irqs; i++)
+ mct_irqs[i] = irq_of_parse_and_map(np, i);
if (mct_int_type == MCT_INT_PPI) {
@@ -581,24 +602,13 @@ static int __init exynos4_timer_resources(struct device_node *np, void __iomem *
static int __init mct_init_dt(struct device_node *np, unsigned int int_type)
{
- u32 nr_irqs, i;
int ret;
- mct_int_type = int_type;
+ ret = exynos4_timer_resources(np);
+ if (ret)
+ return ret;
- /* This driver uses only one global timer interrupt */
- mct_irqs[MCT_G0_IRQ] = irq_of_parse_and_map(np, MCT_G0_IRQ);
-
- /*
- * Find out the number of local irqs specified. The local
- * timer irqs are specified after the four global timer
- * irqs are specified.
- */
- nr_irqs = of_irq_count(np);
- for (i = MCT_L0_IRQ; i < nr_irqs; i++)
- mct_irqs[i] = irq_of_parse_and_map(np, i);
-
- ret = exynos4_timer_resources(np, of_iomap(np, 0));
+ ret = exynos4_timer_interrupts(np, int_type);
if (ret)
return ret;
diff --git a/drivers/clocksource/renesas-ostm.c b/drivers/clocksource/renesas-ostm.c
index 3d06ba6..21d1392 100644
--- a/drivers/clocksource/renesas-ostm.c
+++ b/drivers/clocksource/renesas-ostm.c
@@ -9,6 +9,8 @@
#include <linux/clk.h>
#include <linux/clockchips.h>
#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
#include <linux/sched_clock.h>
#include <linux/slab.h>
@@ -159,6 +161,7 @@ static int __init ostm_init_clkevt(struct timer_of *to)
static int __init ostm_init(struct device_node *np)
{
+ struct reset_control *rstc;
struct timer_of *to;
int ret;
@@ -166,6 +169,14 @@ static int __init ostm_init(struct device_node *np)
if (!to)
return -ENOMEM;
+ rstc = of_reset_control_get_optional_exclusive(np, NULL);
+ if (IS_ERR(rstc)) {
+ ret = PTR_ERR(rstc);
+ goto err_free;
+ }
+
+ reset_control_deassert(rstc);
+
to->flags = TIMER_OF_BASE | TIMER_OF_CLOCK;
if (system_clock) {
/*
@@ -178,7 +189,7 @@ static int __init ostm_init(struct device_node *np)
ret = timer_of_init(np, to);
if (ret)
- goto err_free;
+ goto err_reset;
/*
* First probed device will be used as system clocksource. Any
@@ -203,9 +214,35 @@ static int __init ostm_init(struct device_node *np)
err_cleanup:
timer_of_cleanup(to);
+err_reset:
+ reset_control_assert(rstc);
+ reset_control_put(rstc);
err_free:
kfree(to);
return ret;
}
TIMER_OF_DECLARE(ostm, "renesas,ostm", ostm_init);
+
+#ifdef CONFIG_ARCH_R9A07G044
+static int __init ostm_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+
+ return ostm_init(dev->of_node);
+}
+
+static const struct of_device_id ostm_of_table[] = {
+ { .compatible = "renesas,ostm", },
+ { /* sentinel */ }
+};
+
+static struct platform_driver ostm_device_driver = {
+ .driver = {
+ .name = "renesas_ostm",
+ .of_match_table = of_match_ptr(ostm_of_table),
+ .suppress_bind_attrs = true,
+ },
+};
+builtin_platform_driver_probe(ostm_device_driver, ostm_probe);
+#endif
diff --git a/drivers/clocksource/timer-imx-sysctr.c b/drivers/clocksource/timer-imx-sysctr.c
index 18b90fc..55a8e19 100644
--- a/drivers/clocksource/timer-imx-sysctr.c
+++ b/drivers/clocksource/timer-imx-sysctr.c
@@ -20,8 +20,8 @@
#define SYS_CTR_CLK_DIV 0x3
-static void __iomem *sys_ctr_base;
-static u32 cmpcr;
+static void __iomem *sys_ctr_base __ro_after_init;
+static u32 cmpcr __ro_after_init;
static void sysctr_timer_enable(bool enable)
{
@@ -119,7 +119,7 @@ static struct timer_of to_sysctr = {
static void __init sysctr_clockevent_init(void)
{
- to_sysctr.clkevt.cpumask = cpumask_of(0);
+ to_sysctr.clkevt.cpumask = cpu_possible_mask;
clockevents_config_and_register(&to_sysctr.clkevt,
timer_of_rate(&to_sysctr),
diff --git a/drivers/clocksource/timer-msc313e.c b/drivers/clocksource/timer-msc313e.c
new file mode 100644
index 0000000..54c54ca
--- /dev/null
+++ b/drivers/clocksource/timer-msc313e.c
@@ -0,0 +1,253 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MStar timer driver
+ *
+ * Copyright (C) 2021 Daniel Palmer
+ * Copyright (C) 2021 Romain Perier
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqreturn.h>
+#include <linux/sched_clock.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+
+#ifdef CONFIG_ARM
+#include <linux/delay.h>
+#endif
+
+#include "timer-of.h"
+
+#define TIMER_NAME "msc313e_timer"
+
+#define MSC313E_REG_CTRL 0x00
+#define MSC313E_REG_CTRL_TIMER_EN BIT(0)
+#define MSC313E_REG_CTRL_TIMER_TRIG BIT(1)
+#define MSC313E_REG_CTRL_TIMER_INT_EN BIT(8)
+#define MSC313E_REG_TIMER_MAX_LOW 0x08
+#define MSC313E_REG_TIMER_MAX_HIGH 0x0c
+#define MSC313E_REG_COUNTER_LOW 0x10
+#define MSC313E_REG_COUNTER_HIGH 0x14
+#define MSC313E_REG_TIMER_DIVIDE 0x18
+
+#define MSC313E_CLK_DIVIDER 9
+#define TIMER_SYNC_TICKS 3
+
+#ifdef CONFIG_ARM
+struct msc313e_delay {
+ void __iomem *base;
+ struct delay_timer delay;
+};
+static struct msc313e_delay msc313e_delay;
+#endif
+
+static void __iomem *msc313e_clksrc;
+
+static void msc313e_timer_stop(void __iomem *base)
+{
+ writew(0, base + MSC313E_REG_CTRL);
+}
+
+static void msc313e_timer_start(void __iomem *base, bool periodic)
+{
+ u16 reg;
+
+ reg = readw(base + MSC313E_REG_CTRL);
+ if (periodic)
+ reg |= MSC313E_REG_CTRL_TIMER_EN;
+ else
+ reg |= MSC313E_REG_CTRL_TIMER_TRIG;
+ writew(reg | MSC313E_REG_CTRL_TIMER_INT_EN, base + MSC313E_REG_CTRL);
+}
+
+static void msc313e_timer_setup(void __iomem *base, unsigned long delay)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ writew(delay >> 16, base + MSC313E_REG_TIMER_MAX_HIGH);
+ writew(delay & 0xffff, base + MSC313E_REG_TIMER_MAX_LOW);
+ local_irq_restore(flags);
+}
+
+static unsigned long msc313e_timer_current_value(void __iomem *base)
+{
+ unsigned long flags;
+ u16 l, h;
+
+ local_irq_save(flags);
+ l = readw(base + MSC313E_REG_COUNTER_LOW);
+ h = readw(base + MSC313E_REG_COUNTER_HIGH);
+ local_irq_restore(flags);
+
+ return (((u32)h) << 16 | l);
+}
+
+static int msc313e_timer_clkevt_shutdown(struct clock_event_device *evt)
+{
+ struct timer_of *timer = to_timer_of(evt);
+
+ msc313e_timer_stop(timer_of_base(timer));
+
+ return 0;
+}
+
+static int msc313e_timer_clkevt_set_oneshot(struct clock_event_device *evt)
+{
+ struct timer_of *timer = to_timer_of(evt);
+
+ msc313e_timer_stop(timer_of_base(timer));
+ msc313e_timer_start(timer_of_base(timer), false);
+
+ return 0;
+}
+
+static int msc313e_timer_clkevt_set_periodic(struct clock_event_device *evt)
+{
+ struct timer_of *timer = to_timer_of(evt);
+
+ msc313e_timer_stop(timer_of_base(timer));
+ msc313e_timer_setup(timer_of_base(timer), timer_of_period(timer));
+ msc313e_timer_start(timer_of_base(timer), true);
+
+ return 0;
+}
+
+static int msc313e_timer_clkevt_next_event(unsigned long evt, struct clock_event_device *clkevt)
+{
+ struct timer_of *timer = to_timer_of(clkevt);
+
+ msc313e_timer_stop(timer_of_base(timer));
+ msc313e_timer_setup(timer_of_base(timer), evt);
+ msc313e_timer_start(timer_of_base(timer), false);
+
+ return 0;
+}
+
+static irqreturn_t msc313e_timer_clkevt_irq(int irq, void *dev_id)
+{
+ struct clock_event_device *evt = dev_id;
+
+ evt->event_handler(evt);
+
+ return IRQ_HANDLED;
+}
+
+static u64 msc313e_timer_clksrc_read(struct clocksource *cs)
+{
+ return msc313e_timer_current_value(msc313e_clksrc) & cs->mask;
+}
+
+#ifdef CONFIG_ARM
+static unsigned long msc313e_read_delay_timer_read(void)
+{
+ return msc313e_timer_current_value(msc313e_delay.base);
+}
+#endif
+
+static u64 msc313e_timer_sched_clock_read(void)
+{
+ return msc313e_timer_current_value(msc313e_clksrc);
+}
+
+static struct clock_event_device msc313e_clkevt = {
+ .name = TIMER_NAME,
+ .rating = 300,
+ .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+ .set_state_shutdown = msc313e_timer_clkevt_shutdown,
+ .set_state_periodic = msc313e_timer_clkevt_set_periodic,
+ .set_state_oneshot = msc313e_timer_clkevt_set_oneshot,
+ .tick_resume = msc313e_timer_clkevt_shutdown,
+ .set_next_event = msc313e_timer_clkevt_next_event,
+};
+
+static int __init msc313e_clkevt_init(struct device_node *np)
+{
+ int ret;
+ struct timer_of *to;
+
+ to = kzalloc(sizeof(*to), GFP_KERNEL);
+ if (!to)
+ return -ENOMEM;
+
+ to->flags = TIMER_OF_IRQ | TIMER_OF_CLOCK | TIMER_OF_BASE;
+ to->of_irq.handler = msc313e_timer_clkevt_irq;
+ ret = timer_of_init(np, to);
+ if (ret)
+ return ret;
+
+ if (of_device_is_compatible(np, "sstar,ssd20xd-timer")) {
+ to->of_clk.rate = clk_get_rate(to->of_clk.clk) / MSC313E_CLK_DIVIDER;
+ to->of_clk.period = DIV_ROUND_UP(to->of_clk.rate, HZ);
+ writew(MSC313E_CLK_DIVIDER - 1, timer_of_base(to) + MSC313E_REG_TIMER_DIVIDE);
+ }
+
+ msc313e_clkevt.cpumask = cpu_possible_mask;
+ msc313e_clkevt.irq = to->of_irq.irq;
+ to->clkevt = msc313e_clkevt;
+
+ clockevents_config_and_register(&to->clkevt, timer_of_rate(to),
+ TIMER_SYNC_TICKS, 0xffffffff);
+ return 0;
+}
+
+static int __init msc313e_clksrc_init(struct device_node *np)
+{
+ struct timer_of to = { 0 };
+ int ret;
+ u16 reg;
+
+ to.flags = TIMER_OF_BASE | TIMER_OF_CLOCK;
+ ret = timer_of_init(np, &to);
+ if (ret)
+ return ret;
+
+ msc313e_clksrc = timer_of_base(&to);
+ reg = readw(msc313e_clksrc + MSC313E_REG_CTRL);
+ reg |= MSC313E_REG_CTRL_TIMER_EN;
+ writew(reg, msc313e_clksrc + MSC313E_REG_CTRL);
+
+#ifdef CONFIG_ARM
+ msc313e_delay.base = timer_of_base(&to);
+ msc313e_delay.delay.read_current_timer = msc313e_read_delay_timer_read;
+ msc313e_delay.delay.freq = timer_of_rate(&to);
+
+ register_current_timer_delay(&msc313e_delay.delay);
+#endif
+
+ sched_clock_register(msc313e_timer_sched_clock_read, 32, timer_of_rate(&to));
+ return clocksource_mmio_init(timer_of_base(&to), TIMER_NAME, timer_of_rate(&to), 300, 32,
+ msc313e_timer_clksrc_read);
+}
+
+static int __init msc313e_timer_init(struct device_node *np)
+{
+ int ret = 0;
+ static int num_called;
+
+ switch (num_called) {
+ case 0:
+ ret = msc313e_clksrc_init(np);
+ if (ret)
+ return ret;
+ break;
+
+ default:
+ ret = msc313e_clkevt_init(np);
+ if (ret)
+ return ret;
+ break;
+ }
+
+ num_called++;
+
+ return 0;
+}
+
+TIMER_OF_DECLARE(msc313, "mstar,msc313e-timer", msc313e_timer_init);
+TIMER_OF_DECLARE(ssd20xd, "sstar,ssd20xd-timer", msc313e_timer_init);
diff --git a/drivers/clocksource/timer-pistachio.c b/drivers/clocksource/timer-pistachio.c
index 6f37181..69c069e 100644
--- a/drivers/clocksource/timer-pistachio.c
+++ b/drivers/clocksource/timer-pistachio.c
@@ -71,7 +71,8 @@ static u64 notrace
pistachio_clocksource_read_cycles(struct clocksource *cs)
{
struct pistachio_clocksource *pcs = to_pistachio_clocksource(cs);
- u32 counter, overflow;
+ __maybe_unused u32 overflow;
+ u32 counter;
unsigned long flags;
/*
diff --git a/include/linux/reset.h b/include/linux/reset.h
index db0e611..8a21b57 100644
--- a/include/linux/reset.h
+++ b/include/linux/reset.h
@@ -455,6 +455,26 @@ static inline struct reset_control *of_reset_control_get_exclusive(
}
/**
+ * of_reset_control_get_optional_exclusive - Lookup and obtain an optional exclusive
+ * reference to a reset controller.
+ * @node: device to be reset by the controller
+ * @id: reset line name
+ *
+ * Optional variant of of_reset_control_get_exclusive(). If the requested reset
+ * is not specified in the device tree, this function returns NULL instead of
+ * an error.
+ *
+ * Returns a struct reset_control or IS_ERR() condition containing errno.
+ *
+ * Use of id names is optional.
+ */
+static inline struct reset_control *of_reset_control_get_optional_exclusive(
+ struct device_node *node, const char *id)
+{
+ return __of_reset_control_get(node, id, 0, false, true, true);
+}
+
+/**
* of_reset_control_get_shared - Lookup and obtain a shared reference
* to a reset controller.
* @node: device to be reset by the controller