* [PATCH 02/29] arm64: Add CNTVCT_EL0 trap handler
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
@ 2017-04-16 20:26 ` Daniel Lezcano
2017-04-16 20:26 ` [PATCH 03/29] arm64: Define Cortex-A73 MIDR Daniel Lezcano
` (26 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:26 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, Mark Rutland, Catalin Marinas,
Will Deacon, Suzuki K Poulose, Andre Przywara, Ingo Molnar,
moderated list:ARM64 PORT (AARCH64 ARCHITECTURE)
From: Marc Zyngier <marc.zyngier@arm.com>
Since people seem to make a point in breaking the userspace visible
counter, we have no choice but to trap the access. Add the required
handler.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm64/include/asm/esr.h | 2 ++
arch/arm64/kernel/traps.c | 14 ++++++++++++++
2 files changed, 16 insertions(+)
diff --git a/arch/arm64/include/asm/esr.h b/arch/arm64/include/asm/esr.h
index d14c478..ad42e79 100644
--- a/arch/arm64/include/asm/esr.h
+++ b/arch/arm64/include/asm/esr.h
@@ -175,6 +175,8 @@
#define ESR_ELx_SYS64_ISS_SYS_CTR_READ (ESR_ELx_SYS64_ISS_SYS_CTR | \
ESR_ELx_SYS64_ISS_DIR_READ)
+#define ESR_ELx_SYS64_ISS_SYS_CNTVCT (ESR_ELx_SYS64_ISS_SYS_VAL(3, 3, 2, 14, 0) | \
+ ESR_ELx_SYS64_ISS_DIR_READ)
#ifndef __ASSEMBLY__
#include <asm/types.h>
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index e52be6a..1de444e 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c
@@ -505,6 +505,14 @@ static void ctr_read_handler(unsigned int esr, struct pt_regs *regs)
regs->pc += 4;
}
+static void cntvct_read_handler(unsigned int esr, struct pt_regs *regs)
+{
+ int rt = (esr & ESR_ELx_SYS64_ISS_RT_MASK) >> ESR_ELx_SYS64_ISS_RT_SHIFT;
+
+ pt_regs_write_reg(regs, rt, arch_counter_get_cntvct());
+ regs->pc += 4;
+}
+
struct sys64_hook {
unsigned int esr_mask;
unsigned int esr_val;
@@ -523,6 +531,12 @@ static struct sys64_hook sys64_hooks[] = {
.esr_val = ESR_ELx_SYS64_ISS_SYS_CTR_READ,
.handler = ctr_read_handler,
},
+ {
+ /* Trap read access to CNTVCT_EL0 */
+ .esr_mask = ESR_ELx_SYS64_ISS_SYS_OP_MASK,
+ .esr_val = ESR_ELx_SYS64_ISS_SYS_CNTVCT,
+ .handler = cntvct_read_handler,
+ },
{},
};
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 03/29] arm64: Define Cortex-A73 MIDR
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
2017-04-16 20:26 ` [PATCH 02/29] arm64: Add CNTVCT_EL0 trap handler Daniel Lezcano
@ 2017-04-16 20:26 ` Daniel Lezcano
2017-04-16 20:26 ` [PATCH 04/29] arm64: cpu_errata: Allow an erratum to be match for all revisions of a core Daniel Lezcano
` (25 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:26 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, Mark Rutland, Catalin Marinas,
Will Deacon, Christopher Covington, Shanker Donthineni,
Ganapatrao Kulkarni, Robert Richter,
moderated list:ARM64 PORT (AARCH64 ARCHITECTURE)
From: Marc Zyngier <marc.zyngier@arm.com>
As we're about to introduce a new workaround that is specific to
Cortex-A73, let's define the coresponding MIDR.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm64/include/asm/cputype.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h
index fc50271..0984d1b 100644
--- a/arch/arm64/include/asm/cputype.h
+++ b/arch/arm64/include/asm/cputype.h
@@ -80,6 +80,7 @@
#define ARM_CPU_PART_FOUNDATION 0xD00
#define ARM_CPU_PART_CORTEX_A57 0xD07
#define ARM_CPU_PART_CORTEX_A53 0xD03
+#define ARM_CPU_PART_CORTEX_A73 0xD09
#define APM_CPU_PART_POTENZA 0x000
@@ -92,6 +93,7 @@
#define MIDR_CORTEX_A53 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A53)
#define MIDR_CORTEX_A57 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A57)
+#define MIDR_CORTEX_A73 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A73)
#define MIDR_THUNDERX MIDR_CPU_MODEL(ARM_CPU_IMP_CAVIUM, CAVIUM_CPU_PART_THUNDERX)
#define MIDR_THUNDERX_81XX MIDR_CPU_MODEL(ARM_CPU_IMP_CAVIUM, CAVIUM_CPU_PART_THUNDERX_81XX)
#define MIDR_QCOM_FALKOR_V1 MIDR_CPU_MODEL(ARM_CPU_IMP_QCOM, QCOM_CPU_PART_FALKOR_V1)
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 04/29] arm64: cpu_errata: Allow an erratum to be match for all revisions of a core
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
2017-04-16 20:26 ` [PATCH 02/29] arm64: Add CNTVCT_EL0 trap handler Daniel Lezcano
2017-04-16 20:26 ` [PATCH 03/29] arm64: Define Cortex-A73 MIDR Daniel Lezcano
@ 2017-04-16 20:26 ` Daniel Lezcano
2017-04-16 20:26 ` [PATCH 05/29] arm64: cpu_errata: Add capability to advertise Cortex-A73 erratum 858921 Daniel Lezcano
` (24 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:26 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, Mark Rutland, Catalin Marinas,
Will Deacon, Suzuki K Poulose, Andre Przywara,
Christopher Covington, James Morse, Robert Richter,
moderated list:ARM64 PORT (AARCH64 ARCHITECTURE)
From: Marc Zyngier <marc.zyngier@arm.com>
Some minor erratum may not be fixed in further revisions of a core,
leading to a situation where the workaround needs to be updated each
time an updated core is released.
Introduce a MIDR_ALL_VERSIONS match helper that will work for all
versions of that MIDR, once and for all.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm64/kernel/cpu_errata.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index f6cc67e..2be1d1c 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -53,6 +53,13 @@ static int cpu_enable_trap_ctr_access(void *__unused)
.midr_range_min = min, \
.midr_range_max = max
+#define MIDR_ALL_VERSIONS(model) \
+ .def_scope = SCOPE_LOCAL_CPU, \
+ .matches = is_affected_midr_range, \
+ .midr_model = model, \
+ .midr_range_min = 0, \
+ .midr_range_max = (MIDR_VARIANT_MASK | MIDR_REVISION_MASK)
+
const struct arm64_cpu_capabilities arm64_errata[] = {
#if defined(CONFIG_ARM64_ERRATUM_826319) || \
defined(CONFIG_ARM64_ERRATUM_827319) || \
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 05/29] arm64: cpu_errata: Add capability to advertise Cortex-A73 erratum 858921
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (2 preceding siblings ...)
2017-04-16 20:26 ` [PATCH 04/29] arm64: cpu_errata: Allow an erratum to be match for all revisions of a core Daniel Lezcano
@ 2017-04-16 20:26 ` Daniel Lezcano
2017-04-16 20:26 ` [PATCH 06/29] arm64: arch_timer: Add infrastructure for multiple erratum detection methods Daniel Lezcano
` (23 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:26 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, Catalin Marinas, Will Deacon,
Jonathan Corbet, Christopher Covington, Suzuki K Poulose,
Andre Przywara, Robert Richter, James Morse,
moderated list:ARM64 PORT (AARCH64 ARCHITECTURE),
open list:DOCUMENTATION
From: Marc Zyngier <marc.zyngier@arm.com>
In order to work around Cortex-A73 erratum 858921 in a subsequent
patch, add the required capability that advertise the erratum.
As the configuration option it depends on is not present yet,
this has no immediate effect.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
Documentation/arm64/silicon-errata.txt | 1 +
arch/arm64/include/asm/cpucaps.h | 3 ++-
arch/arm64/kernel/cpu_errata.c | 8 ++++++++
3 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/Documentation/arm64/silicon-errata.txt b/Documentation/arm64/silicon-errata.txt
index 2f66683..10f2ddd 100644
--- a/Documentation/arm64/silicon-errata.txt
+++ b/Documentation/arm64/silicon-errata.txt
@@ -54,6 +54,7 @@ stable kernels.
| ARM | Cortex-A57 | #852523 | N/A |
| ARM | Cortex-A57 | #834220 | ARM64_ERRATUM_834220 |
| ARM | Cortex-A72 | #853709 | N/A |
+| ARM | Cortex-A73 | #858921 | ARM64_ERRATUM_858921 |
| ARM | MMU-500 | #841119,#826419 | N/A |
| | | | |
| Cavium | ThunderX ITS | #22375, #24313 | CAVIUM_ERRATUM_22375 |
diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h
index fb78a5d..b3aab8a 100644
--- a/arch/arm64/include/asm/cpucaps.h
+++ b/arch/arm64/include/asm/cpucaps.h
@@ -37,7 +37,8 @@
#define ARM64_HAS_NO_FPSIMD 16
#define ARM64_WORKAROUND_REPEAT_TLBI 17
#define ARM64_WORKAROUND_QCOM_FALKOR_E1003 18
+#define ARM64_WORKAROUND_858921 19
-#define ARM64_NCAPS 19
+#define ARM64_NCAPS 20
#endif /* __ASM_CPUCAPS_H */
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index 2be1d1c..2ed2a76 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -158,6 +158,14 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
MIDR_CPU_VAR_REV(0, 0)),
},
#endif
+#ifdef CONFIG_ARM64_ERRATUM_858921
+ {
+ /* Cortex-A73 all versions */
+ .desc = "ARM erratum 858921",
+ .capability = ARM64_WORKAROUND_858921,
+ MIDR_ALL_VERSIONS(MIDR_CORTEX_A73),
+ },
+#endif
{
}
};
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 06/29] arm64: arch_timer: Add infrastructure for multiple erratum detection methods
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (3 preceding siblings ...)
2017-04-16 20:26 ` [PATCH 05/29] arm64: cpu_errata: Add capability to advertise Cortex-A73 erratum 858921 Daniel Lezcano
@ 2017-04-16 20:26 ` Daniel Lezcano
2017-04-16 20:26 ` [PATCH 07/29] arm64: arch_timer: Add erratum handler for CPU-specific capability Daniel Lezcano
` (22 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:26 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, Mark Rutland, Catalin Marinas,
Will Deacon, moderated list:ARM ARCHITECTED TIMER DRIVER
From: Marc Zyngier <marc.zyngier@arm.com>
We're currently stuck with DT when it comes to handling errata, which
is pretty restrictive. In order to make things more flexible, let's
introduce an infrastructure that could support alternative discovery
methods. No change in functionality.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm64/include/asm/arch_timer.h | 7 ++-
drivers/clocksource/arm_arch_timer.c | 83 +++++++++++++++++++++++++++++++-----
2 files changed, 78 insertions(+), 12 deletions(-)
diff --git a/arch/arm64/include/asm/arch_timer.h b/arch/arm64/include/asm/arch_timer.h
index b4b3400..5cd964e 100644
--- a/arch/arm64/include/asm/arch_timer.h
+++ b/arch/arm64/include/asm/arch_timer.h
@@ -37,9 +37,14 @@ extern struct static_key_false arch_timer_read_ool_enabled;
#define needs_unstable_timer_counter_workaround() false
#endif
+enum arch_timer_erratum_match_type {
+ ate_match_dt,
+};
struct arch_timer_erratum_workaround {
- const char *id; /* Indicate the Erratum ID */
+ enum arch_timer_erratum_match_type match_type;
+ const void *id;
+ const char *desc;
u32 (*read_cntp_tval_el0)(void);
u32 (*read_cntv_tval_el0)(void);
u64 (*read_cntvct_el0)(void);
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 7a8a411..5c5c2af 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -182,7 +182,9 @@ EXPORT_SYMBOL_GPL(arch_timer_read_ool_enabled);
static const struct arch_timer_erratum_workaround ool_workarounds[] = {
#ifdef CONFIG_FSL_ERRATUM_A008585
{
+ .match_type = ate_match_dt,
.id = "fsl,erratum-a008585",
+ .desc = "Freescale erratum a005858",
.read_cntp_tval_el0 = fsl_a008585_read_cntp_tval_el0,
.read_cntv_tval_el0 = fsl_a008585_read_cntv_tval_el0,
.read_cntvct_el0 = fsl_a008585_read_cntvct_el0,
@@ -190,13 +192,81 @@ static const struct arch_timer_erratum_workaround ool_workarounds[] = {
#endif
#ifdef CONFIG_HISILICON_ERRATUM_161010101
{
+ .match_type = ate_match_dt,
.id = "hisilicon,erratum-161010101",
+ .desc = "HiSilicon erratum 161010101",
.read_cntp_tval_el0 = hisi_161010101_read_cntp_tval_el0,
.read_cntv_tval_el0 = hisi_161010101_read_cntv_tval_el0,
.read_cntvct_el0 = hisi_161010101_read_cntvct_el0,
},
#endif
};
+
+typedef bool (*ate_match_fn_t)(const struct arch_timer_erratum_workaround *,
+ const void *);
+
+static
+bool arch_timer_check_dt_erratum(const struct arch_timer_erratum_workaround *wa,
+ const void *arg)
+{
+ const struct device_node *np = arg;
+
+ return of_property_read_bool(np, wa->id);
+}
+
+static const struct arch_timer_erratum_workaround *
+arch_timer_iterate_errata(enum arch_timer_erratum_match_type type,
+ ate_match_fn_t match_fn,
+ void *arg)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ool_workarounds); i++) {
+ if (ool_workarounds[i].match_type != type)
+ continue;
+
+ if (match_fn(&ool_workarounds[i], arg))
+ return &ool_workarounds[i];
+ }
+
+ return NULL;
+}
+
+static
+void arch_timer_enable_workaround(const struct arch_timer_erratum_workaround *wa)
+{
+ timer_unstable_counter_workaround = wa;
+ static_branch_enable(&arch_timer_read_ool_enabled);
+}
+
+static void arch_timer_check_ool_workaround(enum arch_timer_erratum_match_type type,
+ void *arg)
+{
+ const struct arch_timer_erratum_workaround *wa;
+ ate_match_fn_t match_fn = NULL;
+
+ if (static_branch_unlikely(&arch_timer_read_ool_enabled))
+ return;
+
+ switch (type) {
+ case ate_match_dt:
+ match_fn = arch_timer_check_dt_erratum;
+ break;
+ default:
+ WARN_ON(1);
+ return;
+ }
+
+ wa = arch_timer_iterate_errata(type, match_fn, arg);
+ if (!wa)
+ return;
+
+ arch_timer_enable_workaround(wa);
+ pr_info("Enabling global workaround for %s\n", wa->desc);
+}
+
+#else
+#define arch_timer_check_ool_workaround(t,a) do { } while(0)
#endif /* CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND */
static __always_inline
@@ -960,17 +1030,8 @@ static int __init arch_timer_of_init(struct device_node *np)
arch_timer_c3stop = !of_property_read_bool(np, "always-on");
-#ifdef CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND
- for (i = 0; i < ARRAY_SIZE(ool_workarounds); i++) {
- if (of_property_read_bool(np, ool_workarounds[i].id)) {
- timer_unstable_counter_workaround = &ool_workarounds[i];
- static_branch_enable(&arch_timer_read_ool_enabled);
- pr_info("arch_timer: Enabling workaround for %s\n",
- timer_unstable_counter_workaround->id);
- break;
- }
- }
-#endif
+ /* Check for globally applicable workarounds */
+ arch_timer_check_ool_workaround(ate_match_dt, np);
/*
* If we cannot rely on firmware initializing the timer registers then
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 07/29] arm64: arch_timer: Add erratum handler for CPU-specific capability
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (4 preceding siblings ...)
2017-04-16 20:26 ` [PATCH 06/29] arm64: arch_timer: Add infrastructure for multiple erratum detection methods Daniel Lezcano
@ 2017-04-16 20:26 ` Daniel Lezcano
2017-04-16 20:26 ` [PATCH 08/29] arm64: arch_timer: Move arch_timer_reg_read/write around Daniel Lezcano
` (21 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:26 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, Mark Rutland, Catalin Marinas,
Will Deacon, moderated list:ARM ARCHITECTED TIMER DRIVER
From: Marc Zyngier <marc.zyngier@arm.com>
Should we ever have a workaround for an erratum that is detected using
a capability and affecting a particular CPU, it'd be nice to have
a way to probe them directly.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm64/include/asm/arch_timer.h | 1 +
drivers/clocksource/arm_arch_timer.c | 28 ++++++++++++++++++++++++----
2 files changed, 25 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/include/asm/arch_timer.h b/arch/arm64/include/asm/arch_timer.h
index 5cd964e..1b0d7e9 100644
--- a/arch/arm64/include/asm/arch_timer.h
+++ b/arch/arm64/include/asm/arch_timer.h
@@ -39,6 +39,7 @@ extern struct static_key_false arch_timer_read_ool_enabled;
enum arch_timer_erratum_match_type {
ate_match_dt,
+ ate_match_local_cap_id,
};
struct arch_timer_erratum_workaround {
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 5c5c2af..532e47fa 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -214,6 +214,13 @@ bool arch_timer_check_dt_erratum(const struct arch_timer_erratum_workaround *wa,
return of_property_read_bool(np, wa->id);
}
+static
+bool arch_timer_check_local_cap_erratum(const struct arch_timer_erratum_workaround *wa,
+ const void *arg)
+{
+ return this_cpu_has_cap((uintptr_t)wa->id);
+}
+
static const struct arch_timer_erratum_workaround *
arch_timer_iterate_errata(enum arch_timer_erratum_match_type type,
ate_match_fn_t match_fn,
@@ -244,14 +251,16 @@ static void arch_timer_check_ool_workaround(enum arch_timer_erratum_match_type t
{
const struct arch_timer_erratum_workaround *wa;
ate_match_fn_t match_fn = NULL;
-
- if (static_branch_unlikely(&arch_timer_read_ool_enabled))
- return;
+ bool local = false;
switch (type) {
case ate_match_dt:
match_fn = arch_timer_check_dt_erratum;
break;
+ case ate_match_local_cap_id:
+ match_fn = arch_timer_check_local_cap_erratum;
+ local = true;
+ break;
default:
WARN_ON(1);
return;
@@ -261,8 +270,17 @@ static void arch_timer_check_ool_workaround(enum arch_timer_erratum_match_type t
if (!wa)
return;
+ if (needs_unstable_timer_counter_workaround()) {
+ if (wa != timer_unstable_counter_workaround)
+ pr_warn("Can't enable workaround for %s (clashes with %s\n)",
+ wa->desc,
+ timer_unstable_counter_workaround->desc);
+ return;
+ }
+
arch_timer_enable_workaround(wa);
- pr_info("Enabling global workaround for %s\n", wa->desc);
+ pr_info("Enabling %s workaround for %s\n",
+ local ? "local" : "global", wa->desc);
}
#else
@@ -522,6 +540,8 @@ static void __arch_timer_setup(unsigned type,
BUG();
}
+ arch_timer_check_ool_workaround(ate_match_local_cap_id, NULL);
+
erratum_workaround_set_sne(clk);
} else {
clk->features |= CLOCK_EVT_FEAT_DYNIRQ;
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 08/29] arm64: arch_timer: Move arch_timer_reg_read/write around
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (5 preceding siblings ...)
2017-04-16 20:26 ` [PATCH 07/29] arm64: arch_timer: Add erratum handler for CPU-specific capability Daniel Lezcano
@ 2017-04-16 20:26 ` Daniel Lezcano
2017-04-16 20:26 ` [PATCH 09/29] arm64: arch_timer: Get rid of erratum_workaround_set_sne Daniel Lezcano
` (20 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:26 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, Mark Rutland,
moderated list:ARM ARCHITECTED TIMER DRIVER
From: Marc Zyngier <marc.zyngier@arm.com>
As we're about to move things around, let's start with the low
level read/write functions. This allows us to use these functions
in the errata handling code without having to use forward declaration
of static functions.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/clocksource/arm_arch_timer.c | 124 +++++++++++++++++------------------
1 file changed, 62 insertions(+), 62 deletions(-)
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 532e47fa..b5c83cc 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -96,6 +96,68 @@ early_param("clocksource.arm_arch_timer.evtstrm", early_evtstrm_cfg);
* Architected system timer support.
*/
+static __always_inline
+void arch_timer_reg_write(int access, enum arch_timer_reg reg, u32 val,
+ struct clock_event_device *clk)
+{
+ if (access == ARCH_TIMER_MEM_PHYS_ACCESS) {
+ struct arch_timer *timer = to_arch_timer(clk);
+ switch (reg) {
+ case ARCH_TIMER_REG_CTRL:
+ writel_relaxed(val, timer->base + CNTP_CTL);
+ break;
+ case ARCH_TIMER_REG_TVAL:
+ writel_relaxed(val, timer->base + CNTP_TVAL);
+ break;
+ }
+ } else if (access == ARCH_TIMER_MEM_VIRT_ACCESS) {
+ struct arch_timer *timer = to_arch_timer(clk);
+ switch (reg) {
+ case ARCH_TIMER_REG_CTRL:
+ writel_relaxed(val, timer->base + CNTV_CTL);
+ break;
+ case ARCH_TIMER_REG_TVAL:
+ writel_relaxed(val, timer->base + CNTV_TVAL);
+ break;
+ }
+ } else {
+ arch_timer_reg_write_cp15(access, reg, val);
+ }
+}
+
+static __always_inline
+u32 arch_timer_reg_read(int access, enum arch_timer_reg reg,
+ struct clock_event_device *clk)
+{
+ u32 val;
+
+ if (access == ARCH_TIMER_MEM_PHYS_ACCESS) {
+ struct arch_timer *timer = to_arch_timer(clk);
+ switch (reg) {
+ case ARCH_TIMER_REG_CTRL:
+ val = readl_relaxed(timer->base + CNTP_CTL);
+ break;
+ case ARCH_TIMER_REG_TVAL:
+ val = readl_relaxed(timer->base + CNTP_TVAL);
+ break;
+ }
+ } else if (access == ARCH_TIMER_MEM_VIRT_ACCESS) {
+ struct arch_timer *timer = to_arch_timer(clk);
+ switch (reg) {
+ case ARCH_TIMER_REG_CTRL:
+ val = readl_relaxed(timer->base + CNTV_CTL);
+ break;
+ case ARCH_TIMER_REG_TVAL:
+ val = readl_relaxed(timer->base + CNTV_TVAL);
+ break;
+ }
+ } else {
+ val = arch_timer_reg_read_cp15(access, reg);
+ }
+
+ return val;
+}
+
#ifdef CONFIG_FSL_ERRATUM_A008585
/*
* The number of retries is an arbitrary value well beyond the highest number
@@ -287,68 +349,6 @@ static void arch_timer_check_ool_workaround(enum arch_timer_erratum_match_type t
#define arch_timer_check_ool_workaround(t,a) do { } while(0)
#endif /* CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND */
-static __always_inline
-void arch_timer_reg_write(int access, enum arch_timer_reg reg, u32 val,
- struct clock_event_device *clk)
-{
- if (access == ARCH_TIMER_MEM_PHYS_ACCESS) {
- struct arch_timer *timer = to_arch_timer(clk);
- switch (reg) {
- case ARCH_TIMER_REG_CTRL:
- writel_relaxed(val, timer->base + CNTP_CTL);
- break;
- case ARCH_TIMER_REG_TVAL:
- writel_relaxed(val, timer->base + CNTP_TVAL);
- break;
- }
- } else if (access == ARCH_TIMER_MEM_VIRT_ACCESS) {
- struct arch_timer *timer = to_arch_timer(clk);
- switch (reg) {
- case ARCH_TIMER_REG_CTRL:
- writel_relaxed(val, timer->base + CNTV_CTL);
- break;
- case ARCH_TIMER_REG_TVAL:
- writel_relaxed(val, timer->base + CNTV_TVAL);
- break;
- }
- } else {
- arch_timer_reg_write_cp15(access, reg, val);
- }
-}
-
-static __always_inline
-u32 arch_timer_reg_read(int access, enum arch_timer_reg reg,
- struct clock_event_device *clk)
-{
- u32 val;
-
- if (access == ARCH_TIMER_MEM_PHYS_ACCESS) {
- struct arch_timer *timer = to_arch_timer(clk);
- switch (reg) {
- case ARCH_TIMER_REG_CTRL:
- val = readl_relaxed(timer->base + CNTP_CTL);
- break;
- case ARCH_TIMER_REG_TVAL:
- val = readl_relaxed(timer->base + CNTP_TVAL);
- break;
- }
- } else if (access == ARCH_TIMER_MEM_VIRT_ACCESS) {
- struct arch_timer *timer = to_arch_timer(clk);
- switch (reg) {
- case ARCH_TIMER_REG_CTRL:
- val = readl_relaxed(timer->base + CNTV_CTL);
- break;
- case ARCH_TIMER_REG_TVAL:
- val = readl_relaxed(timer->base + CNTV_TVAL);
- break;
- }
- } else {
- val = arch_timer_reg_read_cp15(access, reg);
- }
-
- return val;
-}
-
static __always_inline irqreturn_t timer_handler(const int access,
struct clock_event_device *evt)
{
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 09/29] arm64: arch_timer: Get rid of erratum_workaround_set_sne
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (6 preceding siblings ...)
2017-04-16 20:26 ` [PATCH 08/29] arm64: arch_timer: Move arch_timer_reg_read/write around Daniel Lezcano
@ 2017-04-16 20:26 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 10/29] arm64: arch_timer: Rework the set_next_event workarounds Daniel Lezcano
` (19 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:26 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, Mark Rutland,
moderated list:ARM ARCHITECTED TIMER DRIVER
From: Marc Zyngier <marc.zyngier@arm.com>
Let's move the handling of workarounds affecting set_next_event
to the affected function, instead of overriding the pointers
as an afterthough. Yes, this is an extra indirection on the
erratum handling path, but the HW is busted anyway.
This will allow for some more flexibility later.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/clocksource/arm_arch_timer.c | 90 ++++++++++++++++--------------------
1 file changed, 41 insertions(+), 49 deletions(-)
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index b5c83cc..2c02e25 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -241,6 +241,38 @@ EXPORT_SYMBOL_GPL(timer_unstable_counter_workaround);
DEFINE_STATIC_KEY_FALSE(arch_timer_read_ool_enabled);
EXPORT_SYMBOL_GPL(arch_timer_read_ool_enabled);
+static void erratum_set_next_event_tval_generic(const int access, unsigned long evt,
+ struct clock_event_device *clk)
+{
+ unsigned long ctrl;
+ u64 cval = evt + arch_counter_get_cntvct();
+
+ ctrl = arch_timer_reg_read(access, ARCH_TIMER_REG_CTRL, clk);
+ ctrl |= ARCH_TIMER_CTRL_ENABLE;
+ ctrl &= ~ARCH_TIMER_CTRL_IT_MASK;
+
+ if (access == ARCH_TIMER_PHYS_ACCESS)
+ write_sysreg(cval, cntp_cval_el0);
+ else
+ write_sysreg(cval, cntv_cval_el0);
+
+ arch_timer_reg_write(access, ARCH_TIMER_REG_CTRL, ctrl, clk);
+}
+
+static int erratum_set_next_event_tval_virt(unsigned long evt,
+ struct clock_event_device *clk)
+{
+ erratum_set_next_event_tval_generic(ARCH_TIMER_VIRT_ACCESS, evt, clk);
+ return 0;
+}
+
+static int erratum_set_next_event_tval_phys(unsigned long evt,
+ struct clock_event_device *clk)
+{
+ erratum_set_next_event_tval_generic(ARCH_TIMER_PHYS_ACCESS, evt, clk);
+ return 0;
+}
+
static const struct arch_timer_erratum_workaround ool_workarounds[] = {
#ifdef CONFIG_FSL_ERRATUM_A008585
{
@@ -347,6 +379,9 @@ static void arch_timer_check_ool_workaround(enum arch_timer_erratum_match_type t
#else
#define arch_timer_check_ool_workaround(t,a) do { } while(0)
+#define erratum_set_next_event_tval_virt(...) ({BUG(); 0;})
+#define erratum_set_next_event_tval_phys(...) ({BUG(); 0;})
+#define needs_unstable_timer_counter_workaround() ({false;})
#endif /* CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND */
static __always_inline irqreturn_t timer_handler(const int access,
@@ -436,43 +471,12 @@ static __always_inline void set_next_event(const int access, unsigned long evt,
arch_timer_reg_write(access, ARCH_TIMER_REG_CTRL, ctrl, clk);
}
-#ifdef CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND
-static __always_inline void erratum_set_next_event_generic(const int access,
- unsigned long evt, struct clock_event_device *clk)
-{
- unsigned long ctrl;
- u64 cval = evt + arch_counter_get_cntvct();
-
- ctrl = arch_timer_reg_read(access, ARCH_TIMER_REG_CTRL, clk);
- ctrl |= ARCH_TIMER_CTRL_ENABLE;
- ctrl &= ~ARCH_TIMER_CTRL_IT_MASK;
-
- if (access == ARCH_TIMER_PHYS_ACCESS)
- write_sysreg(cval, cntp_cval_el0);
- else if (access == ARCH_TIMER_VIRT_ACCESS)
- write_sysreg(cval, cntv_cval_el0);
-
- arch_timer_reg_write(access, ARCH_TIMER_REG_CTRL, ctrl, clk);
-}
-
-static int erratum_set_next_event_virt(unsigned long evt,
- struct clock_event_device *clk)
-{
- erratum_set_next_event_generic(ARCH_TIMER_VIRT_ACCESS, evt, clk);
- return 0;
-}
-
-static int erratum_set_next_event_phys(unsigned long evt,
- struct clock_event_device *clk)
-{
- erratum_set_next_event_generic(ARCH_TIMER_PHYS_ACCESS, evt, clk);
- return 0;
-}
-#endif /* CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND */
-
static int arch_timer_set_next_event_virt(unsigned long evt,
struct clock_event_device *clk)
{
+ if (needs_unstable_timer_counter_workaround())
+ return erratum_set_next_event_tval_virt(evt, clk);
+
set_next_event(ARCH_TIMER_VIRT_ACCESS, evt, clk);
return 0;
}
@@ -480,6 +484,9 @@ static int arch_timer_set_next_event_virt(unsigned long evt,
static int arch_timer_set_next_event_phys(unsigned long evt,
struct clock_event_device *clk)
{
+ if (needs_unstable_timer_counter_workaround())
+ return erratum_set_next_event_tval_phys(evt, clk);
+
set_next_event(ARCH_TIMER_PHYS_ACCESS, evt, clk);
return 0;
}
@@ -498,19 +505,6 @@ static int arch_timer_set_next_event_phys_mem(unsigned long evt,
return 0;
}
-static void erratum_workaround_set_sne(struct clock_event_device *clk)
-{
-#ifdef CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND
- if (!static_branch_unlikely(&arch_timer_read_ool_enabled))
- return;
-
- if (arch_timer_uses_ppi == VIRT_PPI)
- clk->set_next_event = erratum_set_next_event_virt;
- else
- clk->set_next_event = erratum_set_next_event_phys;
-#endif
-}
-
static void __arch_timer_setup(unsigned type,
struct clock_event_device *clk)
{
@@ -541,8 +535,6 @@ static void __arch_timer_setup(unsigned type,
}
arch_timer_check_ool_workaround(ate_match_local_cap_id, NULL);
-
- erratum_workaround_set_sne(clk);
} else {
clk->features |= CLOCK_EVT_FEAT_DYNIRQ;
clk->name = "arch_mem_timer";
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 10/29] arm64: arch_timer: Rework the set_next_event workarounds
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (7 preceding siblings ...)
2017-04-16 20:26 ` [PATCH 09/29] arm64: arch_timer: Get rid of erratum_workaround_set_sne Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 11/29] arm64: arch_timer: Make workaround methods optional Daniel Lezcano
` (18 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, Mark Rutland, Catalin Marinas,
Will Deacon, moderated list:ARM ARCHITECTED TIMER DRIVER
From: Marc Zyngier <marc.zyngier@arm.com>
The way we work around errata affecting set_next_event is not very
nice, at it imposes this workaround on errata that do not need it.
Add new workaround hooks and let the existing workarounds use them.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm64/include/asm/arch_timer.h | 4 ++++
drivers/clocksource/arm_arch_timer.c | 31 ++++++++++++++++++++++++++-----
2 files changed, 30 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/include/asm/arch_timer.h b/arch/arm64/include/asm/arch_timer.h
index 1b0d7e9..cc1e081 100644
--- a/arch/arm64/include/asm/arch_timer.h
+++ b/arch/arm64/include/asm/arch_timer.h
@@ -42,6 +42,8 @@ enum arch_timer_erratum_match_type {
ate_match_local_cap_id,
};
+struct clock_event_device;
+
struct arch_timer_erratum_workaround {
enum arch_timer_erratum_match_type match_type;
const void *id;
@@ -49,6 +51,8 @@ struct arch_timer_erratum_workaround {
u32 (*read_cntp_tval_el0)(void);
u32 (*read_cntv_tval_el0)(void);
u64 (*read_cntvct_el0)(void);
+ int (*set_next_event_phys)(unsigned long, struct clock_event_device *);
+ int (*set_next_event_virt)(unsigned long, struct clock_event_device *);
};
extern const struct arch_timer_erratum_workaround *timer_unstable_counter_workaround;
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 2c02e25..a0c9ee8 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -282,6 +282,8 @@ static const struct arch_timer_erratum_workaround ool_workarounds[] = {
.read_cntp_tval_el0 = fsl_a008585_read_cntp_tval_el0,
.read_cntv_tval_el0 = fsl_a008585_read_cntv_tval_el0,
.read_cntvct_el0 = fsl_a008585_read_cntvct_el0,
+ .set_next_event_phys = erratum_set_next_event_tval_phys,
+ .set_next_event_virt = erratum_set_next_event_tval_virt,
},
#endif
#ifdef CONFIG_HISILICON_ERRATUM_161010101
@@ -292,6 +294,8 @@ static const struct arch_timer_erratum_workaround ool_workarounds[] = {
.read_cntp_tval_el0 = hisi_161010101_read_cntp_tval_el0,
.read_cntv_tval_el0 = hisi_161010101_read_cntv_tval_el0,
.read_cntvct_el0 = hisi_161010101_read_cntvct_el0,
+ .set_next_event_phys = erratum_set_next_event_tval_phys,
+ .set_next_event_virt = erratum_set_next_event_tval_virt,
},
#endif
};
@@ -377,11 +381,24 @@ static void arch_timer_check_ool_workaround(enum arch_timer_erratum_match_type t
local ? "local" : "global", wa->desc);
}
+#define erratum_handler(fn, r, ...) \
+({ \
+ bool __val; \
+ if (needs_unstable_timer_counter_workaround() && \
+ timer_unstable_counter_workaround->fn) { \
+ r = timer_unstable_counter_workaround->fn(__VA_ARGS__); \
+ __val = true; \
+ } else { \
+ __val = false; \
+ } \
+ __val; \
+})
+
#else
#define arch_timer_check_ool_workaround(t,a) do { } while(0)
#define erratum_set_next_event_tval_virt(...) ({BUG(); 0;})
#define erratum_set_next_event_tval_phys(...) ({BUG(); 0;})
-#define needs_unstable_timer_counter_workaround() ({false;})
+#define erratum_handler(fn, r, ...) ({false;})
#endif /* CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND */
static __always_inline irqreturn_t timer_handler(const int access,
@@ -474,8 +491,10 @@ static __always_inline void set_next_event(const int access, unsigned long evt,
static int arch_timer_set_next_event_virt(unsigned long evt,
struct clock_event_device *clk)
{
- if (needs_unstable_timer_counter_workaround())
- return erratum_set_next_event_tval_virt(evt, clk);
+ int ret;
+
+ if (erratum_handler(set_next_event_virt, ret, evt, clk))
+ return ret;
set_next_event(ARCH_TIMER_VIRT_ACCESS, evt, clk);
return 0;
@@ -484,8 +503,10 @@ static int arch_timer_set_next_event_virt(unsigned long evt,
static int arch_timer_set_next_event_phys(unsigned long evt,
struct clock_event_device *clk)
{
- if (needs_unstable_timer_counter_workaround())
- return erratum_set_next_event_tval_phys(evt, clk);
+ int ret;
+
+ if (erratum_handler(set_next_event_phys, ret, evt, clk))
+ return ret;
set_next_event(ARCH_TIMER_PHYS_ACCESS, evt, clk);
return 0;
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 11/29] arm64: arch_timer: Make workaround methods optional
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (8 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 10/29] arm64: arch_timer: Rework the set_next_event workarounds Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 12/29] arm64: arch_timer: Allows a CPU-specific erratum to only affect a subset of CPUs Daniel Lezcano
` (17 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, Mark Rutland, Catalin Marinas,
Will Deacon, moderated list:ARM ARCHITECTED TIMER DRIVER
From: Marc Zyngier <marc.zyngier@arm.com>
Not all errata need to workaround all access types. Allow them to
be optional.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm64/include/asm/arch_timer.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/include/asm/arch_timer.h b/arch/arm64/include/asm/arch_timer.h
index cc1e081..01917b4 100644
--- a/arch/arm64/include/asm/arch_timer.h
+++ b/arch/arm64/include/asm/arch_timer.h
@@ -60,8 +60,9 @@ extern const struct arch_timer_erratum_workaround *timer_unstable_counter_workar
#define arch_timer_reg_read_stable(reg) \
({ \
u64 _val; \
- if (needs_unstable_timer_counter_workaround()) \
- _val = timer_unstable_counter_workaround->read_##reg();\
+ if (needs_unstable_timer_counter_workaround() && \
+ timer_unstable_counter_workaround->read_##reg) \
+ _val = timer_unstable_counter_workaround->read_##reg(); \
else \
_val = read_sysreg(reg); \
_val; \
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 12/29] arm64: arch_timer: Allows a CPU-specific erratum to only affect a subset of CPUs
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (9 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 11/29] arm64: arch_timer: Make workaround methods optional Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 13/29] arm64: arch_timer: Move clocksource_counter and co around Daniel Lezcano
` (16 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, Mark Rutland, Catalin Marinas,
Will Deacon, moderated list:ARM ARCHITECTED TIMER DRIVER
From: Marc Zyngier <marc.zyngier@arm.com>
Instead of applying a CPU-specific workaround to all CPUs in the system,
allow it to only affect a subset of them (typical big-little case).
This is done by turning the erratum pointer into a per-CPU variable.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm64/include/asm/arch_timer.h | 31 ++++++++++++++++----------
drivers/clocksource/arm_arch_timer.c | 42 +++++++++++++++++++++++++-----------
2 files changed, 50 insertions(+), 23 deletions(-)
diff --git a/arch/arm64/include/asm/arch_timer.h b/arch/arm64/include/asm/arch_timer.h
index 01917b4..6bd1a9a 100644
--- a/arch/arm64/include/asm/arch_timer.h
+++ b/arch/arm64/include/asm/arch_timer.h
@@ -25,6 +25,7 @@
#include <linux/bug.h>
#include <linux/init.h>
#include <linux/jump_label.h>
+#include <linux/smp.h>
#include <linux/types.h>
#include <clocksource/arm_arch_timer.h>
@@ -55,17 +56,25 @@ struct arch_timer_erratum_workaround {
int (*set_next_event_virt)(unsigned long, struct clock_event_device *);
};
-extern const struct arch_timer_erratum_workaround *timer_unstable_counter_workaround;
-
-#define arch_timer_reg_read_stable(reg) \
-({ \
- u64 _val; \
- if (needs_unstable_timer_counter_workaround() && \
- timer_unstable_counter_workaround->read_##reg) \
- _val = timer_unstable_counter_workaround->read_##reg(); \
- else \
- _val = read_sysreg(reg); \
- _val; \
+DECLARE_PER_CPU(const struct arch_timer_erratum_workaround *,
+ timer_unstable_counter_workaround);
+
+#define arch_timer_reg_read_stable(reg) \
+({ \
+ u64 _val; \
+ if (needs_unstable_timer_counter_workaround()) { \
+ const struct arch_timer_erratum_workaround *wa; \
+ preempt_disable(); \
+ wa = __this_cpu_read(timer_unstable_counter_workaround); \
+ if (wa && wa->read_##reg) \
+ _val = wa->read_##reg(); \
+ else \
+ _val = read_sysreg(reg); \
+ preempt_enable(); \
+ } else { \
+ _val = read_sysreg(reg); \
+ } \
+ _val; \
})
/*
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index a0c9ee8..4551587 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -235,7 +235,8 @@ static u64 notrace hisi_161010101_read_cntvct_el0(void)
#endif
#ifdef CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND
-const struct arch_timer_erratum_workaround *timer_unstable_counter_workaround = NULL;
+DEFINE_PER_CPU(const struct arch_timer_erratum_workaround *,
+ timer_unstable_counter_workaround);
EXPORT_SYMBOL_GPL(timer_unstable_counter_workaround);
DEFINE_STATIC_KEY_FALSE(arch_timer_read_ool_enabled);
@@ -338,9 +339,18 @@ arch_timer_iterate_errata(enum arch_timer_erratum_match_type type,
}
static
-void arch_timer_enable_workaround(const struct arch_timer_erratum_workaround *wa)
+void arch_timer_enable_workaround(const struct arch_timer_erratum_workaround *wa,
+ bool local)
{
- timer_unstable_counter_workaround = wa;
+ int i;
+
+ if (local) {
+ __this_cpu_write(timer_unstable_counter_workaround, wa);
+ } else {
+ for_each_possible_cpu(i)
+ per_cpu(timer_unstable_counter_workaround, i) = wa;
+ }
+
static_branch_enable(&arch_timer_read_ool_enabled);
}
@@ -369,14 +379,17 @@ static void arch_timer_check_ool_workaround(enum arch_timer_erratum_match_type t
return;
if (needs_unstable_timer_counter_workaround()) {
- if (wa != timer_unstable_counter_workaround)
+ const struct arch_timer_erratum_workaround *__wa;
+ __wa = __this_cpu_read(timer_unstable_counter_workaround);
+ if (__wa && wa != __wa)
pr_warn("Can't enable workaround for %s (clashes with %s\n)",
- wa->desc,
- timer_unstable_counter_workaround->desc);
- return;
+ wa->desc, __wa->desc);
+
+ if (__wa)
+ return;
}
- arch_timer_enable_workaround(wa);
+ arch_timer_enable_workaround(wa, local);
pr_info("Enabling %s workaround for %s\n",
local ? "local" : "global", wa->desc);
}
@@ -384,10 +397,15 @@ static void arch_timer_check_ool_workaround(enum arch_timer_erratum_match_type t
#define erratum_handler(fn, r, ...) \
({ \
bool __val; \
- if (needs_unstable_timer_counter_workaround() && \
- timer_unstable_counter_workaround->fn) { \
- r = timer_unstable_counter_workaround->fn(__VA_ARGS__); \
- __val = true; \
+ if (needs_unstable_timer_counter_workaround()) { \
+ const struct arch_timer_erratum_workaround *__wa; \
+ __wa = __this_cpu_read(timer_unstable_counter_workaround); \
+ if (__wa && __wa->fn) { \
+ r = __wa->fn(__VA_ARGS__); \
+ __val = true; \
+ } else { \
+ __val = false; \
+ } \
} else { \
__val = false; \
} \
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 13/29] arm64: arch_timer: Move clocksource_counter and co around
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (10 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 12/29] arm64: arch_timer: Allows a CPU-specific erratum to only affect a subset of CPUs Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 14/29] arm64: arch_timer: Save cntkctl_el1 as a per-cpu variable Daniel Lezcano
` (15 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, Mark Rutland,
moderated list:ARM ARCHITECTED TIMER DRIVER
From: Marc Zyngier <marc.zyngier@arm.com>
In order to access clocksource_counter from the errata handling code,
move it (together with the related structures and functions) towards
the top of the file.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/clocksource/arm_arch_timer.c | 62 ++++++++++++++++++------------------
1 file changed, 31 insertions(+), 31 deletions(-)
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 4551587..395f5d9 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -158,6 +158,37 @@ u32 arch_timer_reg_read(int access, enum arch_timer_reg reg,
return val;
}
+/*
+ * Default to cp15 based access because arm64 uses this function for
+ * sched_clock() before DT is probed and the cp15 method is guaranteed
+ * to exist on arm64. arm doesn't use this before DT is probed so even
+ * if we don't have the cp15 accessors we won't have a problem.
+ */
+u64 (*arch_timer_read_counter)(void) = arch_counter_get_cntvct;
+
+static u64 arch_counter_read(struct clocksource *cs)
+{
+ return arch_timer_read_counter();
+}
+
+static u64 arch_counter_read_cc(const struct cyclecounter *cc)
+{
+ return arch_timer_read_counter();
+}
+
+static struct clocksource clocksource_counter = {
+ .name = "arch_sys_counter",
+ .rating = 400,
+ .read = arch_counter_read,
+ .mask = CLOCKSOURCE_MASK(56),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static struct cyclecounter cyclecounter __ro_after_init = {
+ .read = arch_counter_read_cc,
+ .mask = CLOCKSOURCE_MASK(56),
+};
+
#ifdef CONFIG_FSL_ERRATUM_A008585
/*
* The number of retries is an arbitrary value well beyond the highest number
@@ -742,37 +773,6 @@ static u64 arch_counter_get_cntvct_mem(void)
return ((u64) vct_hi << 32) | vct_lo;
}
-/*
- * Default to cp15 based access because arm64 uses this function for
- * sched_clock() before DT is probed and the cp15 method is guaranteed
- * to exist on arm64. arm doesn't use this before DT is probed so even
- * if we don't have the cp15 accessors we won't have a problem.
- */
-u64 (*arch_timer_read_counter)(void) = arch_counter_get_cntvct;
-
-static u64 arch_counter_read(struct clocksource *cs)
-{
- return arch_timer_read_counter();
-}
-
-static u64 arch_counter_read_cc(const struct cyclecounter *cc)
-{
- return arch_timer_read_counter();
-}
-
-static struct clocksource clocksource_counter = {
- .name = "arch_sys_counter",
- .rating = 400,
- .read = arch_counter_read,
- .mask = CLOCKSOURCE_MASK(56),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-static struct cyclecounter cyclecounter __ro_after_init = {
- .read = arch_counter_read_cc,
- .mask = CLOCKSOURCE_MASK(56),
-};
-
static struct arch_timer_kvm_info arch_timer_kvm_info;
struct arch_timer_kvm_info *arch_timer_get_kvm_info(void)
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 14/29] arm64: arch_timer: Save cntkctl_el1 as a per-cpu variable
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (11 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 13/29] arm64: arch_timer: Move clocksource_counter and co around Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 15/29] arm64: arch_timer: Enable CNTVCT_EL0 trap if workaround is enabled Daniel Lezcano
` (14 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, Mark Rutland,
moderated list:ARM ARCHITECTED TIMER DRIVER
From: Marc Zyngier <marc.zyngier@arm.com>
As we're about to allow per CPU cntkctl_el1 configuration, we cannot
rely on the register value to be common when performing power
management.
Let's turn saved_cntkctl into a per-cpu variable.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/clocksource/arm_arch_timer.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 395f5d9..5c114da 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -839,14 +839,14 @@ static int arch_timer_dying_cpu(unsigned int cpu)
}
#ifdef CONFIG_CPU_PM
-static unsigned int saved_cntkctl;
+static DEFINE_PER_CPU(unsigned long, saved_cntkctl);
static int arch_timer_cpu_pm_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
if (action == CPU_PM_ENTER)
- saved_cntkctl = arch_timer_get_cntkctl();
+ __this_cpu_write(saved_cntkctl, arch_timer_get_cntkctl());
else if (action == CPU_PM_ENTER_FAILED || action == CPU_PM_EXIT)
- arch_timer_set_cntkctl(saved_cntkctl);
+ arch_timer_set_cntkctl(__this_cpu_read(saved_cntkctl));
return NOTIFY_OK;
}
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 15/29] arm64: arch_timer: Enable CNTVCT_EL0 trap if workaround is enabled
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (12 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 14/29] arm64: arch_timer: Save cntkctl_el1 as a per-cpu variable Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 16/29] arm64: arch_timer: Workaround for Cortex-A73 erratum 858921 Daniel Lezcano
` (13 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, Mark Rutland,
moderated list:ARM ARCHITECTED TIMER DRIVER
From: Marc Zyngier <marc.zyngier@arm.com>
Userspace being allowed to use read CNTVCT_EL0 anytime (and not
only in the VDSO), we need to enable trapping whenever a cntvct
workaround is enabled on a given CPU.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/clocksource/arm_arch_timer.c | 45 +++++++++++++++++++++++++-----------
1 file changed, 32 insertions(+), 13 deletions(-)
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 5c114da..f8adea2 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -83,6 +83,7 @@ static enum ppi_nr arch_timer_uses_ppi = VIRT_PPI;
static bool arch_timer_c3stop;
static bool arch_timer_mem_use_virtual;
static bool arch_counter_suspend_stop;
+static bool vdso_default = true;
static bool evtstrm_enable = IS_ENABLED(CONFIG_ARM_ARCH_TIMER_EVTSTREAM);
@@ -383,6 +384,17 @@ void arch_timer_enable_workaround(const struct arch_timer_erratum_workaround *wa
}
static_branch_enable(&arch_timer_read_ool_enabled);
+
+ /*
+ * Don't use the vdso fastpath if errata require using the
+ * out-of-line counter accessor. We may change our mind pretty
+ * late in the game (with a per-CPU erratum, for example), so
+ * change both the default value and the vdso itself.
+ */
+ if (wa->read_cntvct_el0) {
+ clocksource_counter.archdata.vdso_direct = false;
+ vdso_default = false;
+ }
}
static void arch_timer_check_ool_workaround(enum arch_timer_erratum_match_type type,
@@ -443,11 +455,19 @@ static void arch_timer_check_ool_workaround(enum arch_timer_erratum_match_type t
__val; \
})
+static bool arch_timer_this_cpu_has_cntvct_wa(void)
+{
+ const struct arch_timer_erratum_workaround *wa;
+
+ wa = __this_cpu_read(timer_unstable_counter_workaround);
+ return wa && wa->read_cntvct_el0;
+}
#else
#define arch_timer_check_ool_workaround(t,a) do { } while(0)
#define erratum_set_next_event_tval_virt(...) ({BUG(); 0;})
#define erratum_set_next_event_tval_phys(...) ({BUG(); 0;})
#define erratum_handler(fn, r, ...) ({false;})
+#define arch_timer_this_cpu_has_cntvct_wa() ({false;})
#endif /* CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND */
static __always_inline irqreturn_t timer_handler(const int access,
@@ -660,15 +680,23 @@ static void arch_counter_set_user_access(void)
{
u32 cntkctl = arch_timer_get_cntkctl();
- /* Disable user access to the timers and the physical counter */
+ /* Disable user access to the timers and both counters */
/* Also disable virtual event stream */
cntkctl &= ~(ARCH_TIMER_USR_PT_ACCESS_EN
| ARCH_TIMER_USR_VT_ACCESS_EN
+ | ARCH_TIMER_USR_VCT_ACCESS_EN
| ARCH_TIMER_VIRT_EVT_EN
| ARCH_TIMER_USR_PCT_ACCESS_EN);
- /* Enable user access to the virtual counter */
- cntkctl |= ARCH_TIMER_USR_VCT_ACCESS_EN;
+ /*
+ * Enable user access to the virtual counter if it doesn't
+ * need to be workaround. The vdso may have been already
+ * disabled though.
+ */
+ if (arch_timer_this_cpu_has_cntvct_wa())
+ pr_info("CPU%d: Trapping CNTVCT access\n", smp_processor_id());
+ else
+ cntkctl |= ARCH_TIMER_USR_VCT_ACCESS_EN;
arch_timer_set_cntkctl(cntkctl);
}
@@ -791,16 +819,7 @@ static void __init arch_counter_register(unsigned type)
else
arch_timer_read_counter = arch_counter_get_cntpct;
- clocksource_counter.archdata.vdso_direct = true;
-
-#ifdef CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND
- /*
- * Don't use the vdso fastpath if errata require using
- * the out-of-line counter accessor.
- */
- if (static_branch_unlikely(&arch_timer_read_ool_enabled))
- clocksource_counter.archdata.vdso_direct = false;
-#endif
+ clocksource_counter.archdata.vdso_direct = vdso_default;
} else {
arch_timer_read_counter = arch_counter_get_cntvct_mem;
}
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 16/29] arm64: arch_timer: Workaround for Cortex-A73 erratum 858921
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (13 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 15/29] arm64: arch_timer: Enable CNTVCT_EL0 trap if workaround is enabled Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 17/29] arm64: arch_timer: Allow erratum matching with ACPI OEM information Daniel Lezcano
` (12 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, Mark Rutland,
moderated list:ARM ARCHITECTED TIMER DRIVER
From: Marc Zyngier <marc.zyngier@arm.com>
Cortex-A73 (all versions) counter read can return a wrong value
when the counter crosses a 32bit boundary.
The workaround involves performing the read twice, and to return
one or the other depending on whether a transition has taken place.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/clocksource/Kconfig | 11 +++++++++++
drivers/clocksource/arm_arch_timer.c | 19 +++++++++++++++++++
2 files changed, 30 insertions(+)
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 3356ab8..af80a7c 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -366,6 +366,17 @@ config HISILICON_ERRATUM_161010101
161010101. The workaround will be active if the hisilicon,erratum-161010101
property is found in the timer node.
+config ARM64_ERRATUM_858921
+ bool "Workaround for Cortex-A73 erratum 858921"
+ default y
+ select ARM_ARCH_TIMER_OOL_WORKAROUND
+ depends on ARM_ARCH_TIMER && ARM64
+ help
+ This option enables a workaround applicable to Cortex-A73
+ (all versions), whose counter may return incorrect values.
+ The workaround will be dynamically enabled when an affected
+ core is detected.
+
config ARM_GLOBAL_TIMER
bool "Support for the ARM global timer" if COMPILE_TEST
select CLKSRC_OF if OF
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index f8adea2..8459d19 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -266,6 +266,17 @@ static u64 notrace hisi_161010101_read_cntvct_el0(void)
}
#endif
+#ifdef CONFIG_ARM64_ERRATUM_858921
+static u64 notrace arm64_858921_read_cntvct_el0(void)
+{
+ u64 old, new;
+
+ old = read_sysreg(cntvct_el0);
+ new = read_sysreg(cntvct_el0);
+ return (((old ^ new) >> 32) & 1) ? old : new;
+}
+#endif
+
#ifdef CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND
DEFINE_PER_CPU(const struct arch_timer_erratum_workaround *,
timer_unstable_counter_workaround);
@@ -331,6 +342,14 @@ static const struct arch_timer_erratum_workaround ool_workarounds[] = {
.set_next_event_virt = erratum_set_next_event_tval_virt,
},
#endif
+#ifdef CONFIG_ARM64_ERRATUM_858921
+ {
+ .match_type = ate_match_local_cap_id,
+ .id = (void *)ARM64_WORKAROUND_858921,
+ .desc = "ARM erratum 858921",
+ .read_cntvct_el0 = arm64_858921_read_cntvct_el0,
+ },
+#endif
};
typedef bool (*ate_match_fn_t)(const struct arch_timer_erratum_workaround *,
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 17/29] arm64: arch_timer: Allow erratum matching with ACPI OEM information
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (14 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 16/29] arm64: arch_timer: Workaround for Cortex-A73 erratum 858921 Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 18/29] arm64: arch_timer: Add HISILICON_ERRATUM_161010101 ACPI matching data Daniel Lezcano
` (11 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, dann frazier, Hanjun Guo,
Mark Rutland, Catalin Marinas, Will Deacon,
moderated list:ARM ARCHITECTED TIMER DRIVER
From: Marc Zyngier <marc.zyngier@arm.com>
Just as we're able to identify a broken platform using some DT
information, let's enable a way to spot the offenders with ACPI.
The difference is that we can only match on some OEM info instead
of implementation-specific properties. So in order to avoid the
insane multiplication of errata structures, we allow an array
of OEM descriptions to be attached to an erratum structure.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: dann frazier <dann.frazier@canonical.com>
Tested-by: Hanjun Guo <hanjun.guo@linaro.org>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm64/include/asm/arch_timer.h | 1 +
drivers/clocksource/arm_arch_timer.c | 34 ++++++++++++++++++++++++++++++++++
2 files changed, 35 insertions(+)
diff --git a/arch/arm64/include/asm/arch_timer.h b/arch/arm64/include/asm/arch_timer.h
index 6bd1a9a..74d08e4 100644
--- a/arch/arm64/include/asm/arch_timer.h
+++ b/arch/arm64/include/asm/arch_timer.h
@@ -41,6 +41,7 @@ extern struct static_key_false arch_timer_read_ool_enabled;
enum arch_timer_erratum_match_type {
ate_match_dt,
ate_match_local_cap_id,
+ ate_match_acpi_oem_info,
};
struct clock_event_device;
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 8459d19..887f6d0 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -190,6 +190,12 @@ static struct cyclecounter cyclecounter __ro_after_init = {
.mask = CLOCKSOURCE_MASK(56),
};
+struct ate_acpi_oem_info {
+ char oem_id[ACPI_OEM_ID_SIZE + 1];
+ char oem_table_id[ACPI_OEM_TABLE_ID_SIZE + 1];
+ u32 oem_revision;
+};
+
#ifdef CONFIG_FSL_ERRATUM_A008585
/*
* The number of retries is an arbitrary value well beyond the highest number
@@ -371,6 +377,28 @@ bool arch_timer_check_local_cap_erratum(const struct arch_timer_erratum_workarou
return this_cpu_has_cap((uintptr_t)wa->id);
}
+
+static
+bool arch_timer_check_acpi_oem_erratum(const struct arch_timer_erratum_workaround *wa,
+ const void *arg)
+{
+ static const struct ate_acpi_oem_info empty_oem_info = {};
+ const struct ate_acpi_oem_info *info = wa->id;
+ const struct acpi_table_header *table = arg;
+
+ /* Iterate over the ACPI OEM info array, looking for a match */
+ while (memcmp(info, &empty_oem_info, sizeof(*info))) {
+ if (!memcmp(info->oem_id, table->oem_id, ACPI_OEM_ID_SIZE) &&
+ !memcmp(info->oem_table_id, table->oem_table_id, ACPI_OEM_TABLE_ID_SIZE) &&
+ info->oem_revision == table->oem_revision)
+ return true;
+
+ info++;
+ }
+
+ return false;
+}
+
static const struct arch_timer_erratum_workaround *
arch_timer_iterate_errata(enum arch_timer_erratum_match_type type,
ate_match_fn_t match_fn,
@@ -431,6 +459,9 @@ static void arch_timer_check_ool_workaround(enum arch_timer_erratum_match_type t
match_fn = arch_timer_check_local_cap_erratum;
local = true;
break;
+ case ate_match_acpi_oem_info:
+ match_fn = arch_timer_check_acpi_oem_erratum;
+ break;
default:
WARN_ON(1);
return;
@@ -1277,6 +1308,9 @@ static int __init arch_timer_acpi_init(struct acpi_table_header *table)
/* Always-on capability */
arch_timer_c3stop = !(gtdt->non_secure_el1_flags & ACPI_GTDT_ALWAYS_ON);
+ /* Check for globally applicable workarounds */
+ arch_timer_check_ool_workaround(ate_match_acpi_oem_info, table);
+
arch_timer_init();
return 0;
}
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 18/29] arm64: arch_timer: Add HISILICON_ERRATUM_161010101 ACPI matching data
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (15 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 17/29] arm64: arch_timer: Allow erratum matching with ACPI OEM information Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 19/29] clocksource/drivers/orion: Read clock rate once Daniel Lezcano
` (10 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Marc Zyngier, dann frazier, Hanjun Guo,
Mark Rutland, moderated list:ARM ARCHITECTED TIMER DRIVER
From: Marc Zyngier <marc.zyngier@arm.com>
In order to deal with ACPI enabled platforms suffering from the
HISILICON_ERRATUM_161010101, let's add the required OEM data that
allow the workaround to be enabled.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: dann frazier <dann.frazier@canonical.com>
Tested-by: Hanjun Guo <hanjun.guo@linaro.org>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/clocksource/arm_arch_timer.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 887f6d0..bf9e9d7 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -270,6 +270,29 @@ static u64 notrace hisi_161010101_read_cntvct_el0(void)
{
return __hisi_161010101_read_reg(cntvct_el0);
}
+
+static struct ate_acpi_oem_info hisi_161010101_oem_info[] = {
+ /*
+ * Note that trailing spaces are required to properly match
+ * the OEM table information.
+ */
+ {
+ .oem_id = "HISI ",
+ .oem_table_id = "HIP05 ",
+ .oem_revision = 0,
+ },
+ {
+ .oem_id = "HISI ",
+ .oem_table_id = "HIP06 ",
+ .oem_revision = 0,
+ },
+ {
+ .oem_id = "HISI ",
+ .oem_table_id = "HIP07 ",
+ .oem_revision = 0,
+ },
+ { /* Sentinel indicating the end of the OEM array */ },
+};
#endif
#ifdef CONFIG_ARM64_ERRATUM_858921
@@ -347,6 +370,16 @@ static const struct arch_timer_erratum_workaround ool_workarounds[] = {
.set_next_event_phys = erratum_set_next_event_tval_phys,
.set_next_event_virt = erratum_set_next_event_tval_virt,
},
+ {
+ .match_type = ate_match_acpi_oem_info,
+ .id = hisi_161010101_oem_info,
+ .desc = "HiSilicon erratum 161010101",
+ .read_cntp_tval_el0 = hisi_161010101_read_cntp_tval_el0,
+ .read_cntv_tval_el0 = hisi_161010101_read_cntv_tval_el0,
+ .read_cntvct_el0 = hisi_161010101_read_cntvct_el0,
+ .set_next_event_phys = erratum_set_next_event_tval_phys,
+ .set_next_event_virt = erratum_set_next_event_tval_virt,
+ },
#endif
#ifdef CONFIG_ARM64_ERRATUM_858921
{
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 19/29] clocksource/drivers/orion: Read clock rate once
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (16 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 18/29] arm64: arch_timer: Add HISILICON_ERRATUM_161010101 ACPI matching data Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 20/29] clocksource/drivers/orion: Add delay_timer implementation Daniel Lezcano
` (9 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx; +Cc: linux-kernel, Russell King
From: Russell King <rmk+kernel@armlinux.org.uk>
Rather than reading the clock rate three times, read it once - we are
about to add a fourth usage.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/clocksource/time-orion.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/clocksource/time-orion.c b/drivers/clocksource/time-orion.c
index a28f496..c4818a5 100644
--- a/drivers/clocksource/time-orion.c
+++ b/drivers/clocksource/time-orion.c
@@ -106,6 +106,7 @@ static struct irqaction orion_clkevt_irq = {
static int __init orion_timer_init(struct device_node *np)
{
+ unsigned long rate;
struct clk *clk;
int irq, ret;
@@ -135,6 +136,8 @@ static int __init orion_timer_init(struct device_node *np)
return -EINVAL;
}
+ rate = clk_get_rate(clk);
+
/* setup timer0 as free-running clocksource */
writel(~0, timer_base + TIMER0_VAL);
writel(~0, timer_base + TIMER0_RELOAD);
@@ -142,15 +145,15 @@ static int __init orion_timer_init(struct device_node *np)
TIMER0_RELOAD_EN | TIMER0_EN,
TIMER0_RELOAD_EN | TIMER0_EN);
- ret = clocksource_mmio_init(timer_base + TIMER0_VAL, "orion_clocksource",
- clk_get_rate(clk), 300, 32,
+ ret = clocksource_mmio_init(timer_base + TIMER0_VAL,
+ "orion_clocksource", rate, 300, 32,
clocksource_mmio_readl_down);
if (ret) {
pr_err("Failed to initialize mmio timer");
return ret;
}
- sched_clock_register(orion_read_sched_clock, 32, clk_get_rate(clk));
+ sched_clock_register(orion_read_sched_clock, 32, rate);
/* setup timer1 as clockevent timer */
ret = setup_irq(irq, &orion_clkevt_irq);
@@ -162,7 +165,7 @@ static int __init orion_timer_init(struct device_node *np)
ticks_per_jiffy = (clk_get_rate(clk) + HZ/2) / HZ;
orion_clkevt.cpumask = cpumask_of(0);
orion_clkevt.irq = irq;
- clockevents_config_and_register(&orion_clkevt, clk_get_rate(clk),
+ clockevents_config_and_register(&orion_clkevt, rate,
ORION_ONESHOT_MIN, ORION_ONESHOT_MAX);
return 0;
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 20/29] clocksource/drivers/orion: Add delay_timer implementation
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (17 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 19/29] clocksource/drivers/orion: Read clock rate once Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 21/29] clocksource: Add missing line break to error messages Daniel Lezcano
` (8 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx; +Cc: linux-kernel, Russell King
From: Russell King <rmk+kernel@armlinux.org.uk>
Add an implementation for the ARM delay timer, which is used for
udelay(). This provides less CPU dependent and more accurate delays -
the CPU loop on Marvell Dove appears to calibrate to around 6% too
short.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/clocksource/time-orion.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/clocksource/time-orion.c b/drivers/clocksource/time-orion.c
index c4818a5..7eb2ab0 100644
--- a/drivers/clocksource/time-orion.c
+++ b/drivers/clocksource/time-orion.c
@@ -15,6 +15,7 @@
#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/clockchips.h>
+#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
@@ -36,6 +37,21 @@
static void __iomem *timer_base;
+static unsigned long notrace orion_read_timer(void)
+{
+ return ~readl(timer_base + TIMER0_VAL);
+}
+
+static struct delay_timer orion_delay_timer = {
+ .read_current_timer = orion_read_timer,
+};
+
+static void orion_delay_timer_init(unsigned long rate)
+{
+ orion_delay_timer.freq = rate;
+ register_current_timer_delay(&orion_delay_timer);
+}
+
/*
* Free-running clocksource handling.
*/
@@ -168,6 +184,9 @@ static int __init orion_timer_init(struct device_node *np)
clockevents_config_and_register(&orion_clkevt, rate,
ORION_ONESHOT_MIN, ORION_ONESHOT_MAX);
+
+ orion_delay_timer_init(rate);
+
return 0;
}
CLOCKSOURCE_OF_DECLARE(orion_timer, "marvell,orion-timer", orion_timer_init);
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 21/29] clocksource: Add missing line break to error messages
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (18 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 20/29] clocksource/drivers/orion: Add delay_timer implementation Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-24 7:45 ` Uwe Kleine-König
2017-04-16 20:27 ` [PATCH 22/29] dt-bindings: Clarify compatible property for rockchip timers Daniel Lezcano
` (7 subsequent siblings)
27 siblings, 1 reply; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Rafał Miłecki, Thierry Reding,
Vineet Gupta, Mark Rutland, Marc Zyngier, Florian Fainelli,
Ray Jui, Scott Branden,
maintainer:BROADCOM BCM281XX/BCM11XXX/BCM216XX ARM ARCHITE...,
Stephen Warren, Lee Jones, Eric Anholt, Carlo Caione,
Kevin Hilman, Maxime Ripard, Chen-Yu Tsai, Thierry Reding,
Alexandre Courbot, Uwe Kleine-König, Baruch Siach,
Barry Song, open list:SYNOPSYS ARC ARCHITECTURE,
moderated list:ARM ARCHITECTED TIMER DRIVER,
moderated list:BROADCOM BCM2835 ARM ARCHITECTURE,
open list:ARM/Amlogic Meson SoC support,
open list:TEGRA ARCHITECTURE SUPPORT
From: Rafał Miłecki <rafal@milecki.pl>
Printing with pr_* functions requires adding line break manually.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/clocksource/arc_timer.c | 14 +++++++-------
drivers/clocksource/arm_arch_timer.c | 2 +-
drivers/clocksource/asm9260_timer.c | 2 +-
drivers/clocksource/bcm2835_timer.c | 6 +++---
drivers/clocksource/bcm_kona_timer.c | 2 +-
drivers/clocksource/clksrc-probe.c | 2 +-
drivers/clocksource/dw_apb_timer.c | 2 +-
drivers/clocksource/meson6_timer.c | 4 ++--
drivers/clocksource/mips-gic-timer.c | 2 +-
drivers/clocksource/nomadik-mtu.c | 8 ++++----
drivers/clocksource/pxa_timer.c | 6 +++---
drivers/clocksource/samsung_pwm_timer.c | 6 +++---
drivers/clocksource/sun4i_timer.c | 10 +++++-----
drivers/clocksource/tegra20_timer.c | 2 +-
drivers/clocksource/time-armada-370-xp.c | 16 ++++++++--------
drivers/clocksource/time-efm32.c | 2 +-
drivers/clocksource/time-orion.c | 4 ++--
drivers/clocksource/timer-atmel-pit.c | 2 +-
drivers/clocksource/timer-digicolor.c | 6 +++---
drivers/clocksource/timer-integrator-ap.c | 4 ++--
drivers/clocksource/timer-nps.c | 6 +++---
drivers/clocksource/timer-prima2.c | 10 +++++-----
drivers/clocksource/timer-sp804.c | 4 ++--
drivers/clocksource/timer-sun5i.c | 6 +++---
drivers/clocksource/vf_pit_timer.c | 2 +-
25 files changed, 65 insertions(+), 65 deletions(-)
diff --git a/drivers/clocksource/arc_timer.c b/drivers/clocksource/arc_timer.c
index 7517f95..2164973 100644
--- a/drivers/clocksource/arc_timer.c
+++ b/drivers/clocksource/arc_timer.c
@@ -37,7 +37,7 @@ static int noinline arc_get_timer_clk(struct device_node *node)
clk = of_clk_get(node, 0);
if (IS_ERR(clk)) {
- pr_err("timer missing clk");
+ pr_err("timer missing clk\n");
return PTR_ERR(clk);
}
@@ -89,7 +89,7 @@ static int __init arc_cs_setup_gfrc(struct device_node *node)
READ_BCR(ARC_REG_MCIP_BCR, mp);
if (!mp.gfrc) {
- pr_warn("Global-64-bit-Ctr clocksource not detected");
+ pr_warn("Global-64-bit-Ctr clocksource not detected\n");
return -ENXIO;
}
@@ -140,13 +140,13 @@ static int __init arc_cs_setup_rtc(struct device_node *node)
READ_BCR(ARC_REG_TIMERS_BCR, timer);
if (!timer.rtc) {
- pr_warn("Local-64-bit-Ctr clocksource not detected");
+ pr_warn("Local-64-bit-Ctr clocksource not detected\n");
return -ENXIO;
}
/* Local to CPU hence not usable in SMP */
if (IS_ENABLED(CONFIG_SMP)) {
- pr_warn("Local-64-bit-Ctr not usable in SMP");
+ pr_warn("Local-64-bit-Ctr not usable in SMP\n");
return -EINVAL;
}
@@ -290,13 +290,13 @@ static int __init arc_clockevent_setup(struct device_node *node)
arc_timer_irq = irq_of_parse_and_map(node, 0);
if (arc_timer_irq <= 0) {
- pr_err("clockevent: missing irq");
+ pr_err("clockevent: missing irq\n");
return -EINVAL;
}
ret = arc_get_timer_clk(node);
if (ret) {
- pr_err("clockevent: missing clk");
+ pr_err("clockevent: missing clk\n");
return ret;
}
@@ -313,7 +313,7 @@ static int __init arc_clockevent_setup(struct device_node *node)
arc_timer_starting_cpu,
arc_timer_dying_cpu);
if (ret) {
- pr_err("Failed to setup hotplug state");
+ pr_err("Failed to setup hotplug state\n");
return ret;
}
return 0;
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 7a8a411..56c3e25 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -1055,7 +1055,7 @@ static int __init arch_timer_mem_init(struct device_node *np)
ret = -EINVAL;
if (!irq) {
- pr_err("arch_timer: Frame missing %s irq",
+ pr_err("arch_timer: Frame missing %s irq\n",
arch_timer_mem_use_virtual ? "virt" : "phys");
goto out;
}
diff --git a/drivers/clocksource/asm9260_timer.c b/drivers/clocksource/asm9260_timer.c
index 1ba871b..c678083 100644
--- a/drivers/clocksource/asm9260_timer.c
+++ b/drivers/clocksource/asm9260_timer.c
@@ -193,7 +193,7 @@ static int __init asm9260_timer_init(struct device_node *np)
priv.base = of_io_request_and_map(np, 0, np->name);
if (IS_ERR(priv.base)) {
- pr_err("%s: unable to map resource", np->name);
+ pr_err("%s: unable to map resource\n", np->name);
return PTR_ERR(priv.base);
}
diff --git a/drivers/clocksource/bcm2835_timer.c b/drivers/clocksource/bcm2835_timer.c
index f2f29d2..dce4430 100644
--- a/drivers/clocksource/bcm2835_timer.c
+++ b/drivers/clocksource/bcm2835_timer.c
@@ -89,13 +89,13 @@ static int __init bcm2835_timer_init(struct device_node *node)
base = of_iomap(node, 0);
if (!base) {
- pr_err("Can't remap registers");
+ pr_err("Can't remap registers\n");
return -ENXIO;
}
ret = of_property_read_u32(node, "clock-frequency", &freq);
if (ret) {
- pr_err("Can't read clock-frequency");
+ pr_err("Can't read clock-frequency\n");
goto err_iounmap;
}
@@ -107,7 +107,7 @@ static int __init bcm2835_timer_init(struct device_node *node)
irq = irq_of_parse_and_map(node, DEFAULT_TIMER);
if (irq <= 0) {
- pr_err("Can't parse IRQ");
+ pr_err("Can't parse IRQ\n");
ret = -EINVAL;
goto err_iounmap;
}
diff --git a/drivers/clocksource/bcm_kona_timer.c b/drivers/clocksource/bcm_kona_timer.c
index 92f6e4d..fda5e147 100644
--- a/drivers/clocksource/bcm_kona_timer.c
+++ b/drivers/clocksource/bcm_kona_timer.c
@@ -179,7 +179,7 @@ static int __init kona_timer_init(struct device_node *node)
} else if (!of_property_read_u32(node, "clock-frequency", &freq)) {
arch_timer_rate = freq;
} else {
- pr_err("Kona Timer v1 unable to determine clock-frequency");
+ pr_err("Kona Timer v1 unable to determine clock-frequency\n");
return -EINVAL;
}
diff --git a/drivers/clocksource/clksrc-probe.c b/drivers/clocksource/clksrc-probe.c
index bc62be9..ac701ff 100644
--- a/drivers/clocksource/clksrc-probe.c
+++ b/drivers/clocksource/clksrc-probe.c
@@ -40,7 +40,7 @@ void __init clocksource_probe(void)
ret = init_func_ret(np);
if (ret) {
- pr_err("Failed to initialize '%s': %d",
+ pr_err("Failed to initialize '%s': %d\n",
of_node_full_name(np), ret);
continue;
}
diff --git a/drivers/clocksource/dw_apb_timer.c b/drivers/clocksource/dw_apb_timer.c
index 63e4f55..9e937e2 100644
--- a/drivers/clocksource/dw_apb_timer.c
+++ b/drivers/clocksource/dw_apb_timer.c
@@ -101,7 +101,7 @@ static irqreturn_t dw_apb_clockevent_irq(int irq, void *data)
struct dw_apb_clock_event_device *dw_ced = ced_to_dw_apb_ced(evt);
if (!evt->event_handler) {
- pr_info("Spurious APBT timer interrupt %d", irq);
+ pr_info("Spurious APBT timer interrupt %d\n", irq);
return IRQ_NONE;
}
diff --git a/drivers/clocksource/meson6_timer.c b/drivers/clocksource/meson6_timer.c
index 52af591..39d21f6 100644
--- a/drivers/clocksource/meson6_timer.c
+++ b/drivers/clocksource/meson6_timer.c
@@ -133,13 +133,13 @@ static int __init meson6_timer_init(struct device_node *node)
timer_base = of_io_request_and_map(node, 0, "meson6-timer");
if (IS_ERR(timer_base)) {
- pr_err("Can't map registers");
+ pr_err("Can't map registers\n");
return -ENXIO;
}
irq = irq_of_parse_and_map(node, 0);
if (irq <= 0) {
- pr_err("Can't parse IRQ");
+ pr_err("Can't parse IRQ\n");
return -EINVAL;
}
diff --git a/drivers/clocksource/mips-gic-timer.c b/drivers/clocksource/mips-gic-timer.c
index d9ef7a6..b6ad9c0 100644
--- a/drivers/clocksource/mips-gic-timer.c
+++ b/drivers/clocksource/mips-gic-timer.c
@@ -174,7 +174,7 @@ static int __init gic_clocksource_of_init(struct device_node *node)
if (!gic_present || !node->parent ||
!of_device_is_compatible(node->parent, "mti,gic")) {
- pr_warn("No DT definition for the mips gic driver");
+ pr_warn("No DT definition for the mips gic driver\n");
return -ENXIO;
}
diff --git a/drivers/clocksource/nomadik-mtu.c b/drivers/clocksource/nomadik-mtu.c
index 3c124d1..7d44de3 100644
--- a/drivers/clocksource/nomadik-mtu.c
+++ b/drivers/clocksource/nomadik-mtu.c
@@ -260,25 +260,25 @@ static int __init nmdk_timer_of_init(struct device_node *node)
base = of_iomap(node, 0);
if (!base) {
- pr_err("Can't remap registers");
+ pr_err("Can't remap registers\n");
return -ENXIO;
}
pclk = of_clk_get_by_name(node, "apb_pclk");
if (IS_ERR(pclk)) {
- pr_err("could not get apb_pclk");
+ pr_err("could not get apb_pclk\n");
return PTR_ERR(pclk);
}
clk = of_clk_get_by_name(node, "timclk");
if (IS_ERR(clk)) {
- pr_err("could not get timclk");
+ pr_err("could not get timclk\n");
return PTR_ERR(clk);
}
irq = irq_of_parse_and_map(node, 0);
if (irq <= 0) {
- pr_err("Can't parse IRQ");
+ pr_err("Can't parse IRQ\n");
return -EINVAL;
}
diff --git a/drivers/clocksource/pxa_timer.c b/drivers/clocksource/pxa_timer.c
index 1c24de2..a10fa667 100644
--- a/drivers/clocksource/pxa_timer.c
+++ b/drivers/clocksource/pxa_timer.c
@@ -166,14 +166,14 @@ static int __init pxa_timer_common_init(int irq, unsigned long clock_tick_rate)
ret = setup_irq(irq, &pxa_ost0_irq);
if (ret) {
- pr_err("Failed to setup irq");
+ pr_err("Failed to setup irq\n");
return ret;
}
ret = clocksource_mmio_init(timer_base + OSCR, "oscr0", clock_tick_rate, 200,
32, clocksource_mmio_readl_up);
if (ret) {
- pr_err("Failed to init clocksource");
+ pr_err("Failed to init clocksource\n");
return ret;
}
@@ -203,7 +203,7 @@ static int __init pxa_timer_dt_init(struct device_node *np)
ret = clk_prepare_enable(clk);
if (ret) {
- pr_crit("Failed to prepare clock");
+ pr_crit("Failed to prepare clock\n");
return ret;
}
diff --git a/drivers/clocksource/samsung_pwm_timer.c b/drivers/clocksource/samsung_pwm_timer.c
index 0093ece..a68e653 100644
--- a/drivers/clocksource/samsung_pwm_timer.c
+++ b/drivers/clocksource/samsung_pwm_timer.c
@@ -385,7 +385,7 @@ static int __init _samsung_pwm_clocksource_init(void)
mask = ~pwm.variant.output_mask & ((1 << SAMSUNG_PWM_NUM) - 1);
channel = fls(mask) - 1;
if (channel < 0) {
- pr_crit("failed to find PWM channel for clocksource");
+ pr_crit("failed to find PWM channel for clocksource\n");
return -EINVAL;
}
pwm.source_id = channel;
@@ -393,7 +393,7 @@ static int __init _samsung_pwm_clocksource_init(void)
mask &= ~(1 << channel);
channel = fls(mask) - 1;
if (channel < 0) {
- pr_crit("failed to find PWM channel for clock event");
+ pr_crit("failed to find PWM channel for clock event\n");
return -EINVAL;
}
pwm.event_id = channel;
@@ -448,7 +448,7 @@ static int __init samsung_pwm_alloc(struct device_node *np,
pwm.timerclk = of_clk_get_by_name(np, "timers");
if (IS_ERR(pwm.timerclk)) {
- pr_crit("failed to get timers clock for timer");
+ pr_crit("failed to get timers clock for timer\n");
return PTR_ERR(pwm.timerclk);
}
diff --git a/drivers/clocksource/sun4i_timer.c b/drivers/clocksource/sun4i_timer.c
index c83452c..4452d5c 100644
--- a/drivers/clocksource/sun4i_timer.c
+++ b/drivers/clocksource/sun4i_timer.c
@@ -159,25 +159,25 @@ static int __init sun4i_timer_init(struct device_node *node)
timer_base = of_iomap(node, 0);
if (!timer_base) {
- pr_crit("Can't map registers");
+ pr_crit("Can't map registers\n");
return -ENXIO;
}
irq = irq_of_parse_and_map(node, 0);
if (irq <= 0) {
- pr_crit("Can't parse IRQ");
+ pr_crit("Can't parse IRQ\n");
return -EINVAL;
}
clk = of_clk_get(node, 0);
if (IS_ERR(clk)) {
- pr_crit("Can't get timer clock");
+ pr_crit("Can't get timer clock\n");
return PTR_ERR(clk);
}
ret = clk_prepare_enable(clk);
if (ret) {
- pr_err("Failed to prepare clock");
+ pr_err("Failed to prepare clock\n");
return ret;
}
@@ -200,7 +200,7 @@ static int __init sun4i_timer_init(struct device_node *node)
ret = clocksource_mmio_init(timer_base + TIMER_CNTVAL_REG(1), node->name,
rate, 350, 32, clocksource_mmio_readl_down);
if (ret) {
- pr_err("Failed to register clocksource");
+ pr_err("Failed to register clocksource\n");
return ret;
}
diff --git a/drivers/clocksource/tegra20_timer.c b/drivers/clocksource/tegra20_timer.c
index f960891..b9990b9 100644
--- a/drivers/clocksource/tegra20_timer.c
+++ b/drivers/clocksource/tegra20_timer.c
@@ -245,7 +245,7 @@ static int __init tegra20_init_rtc(struct device_node *np)
rtc_base = of_iomap(np, 0);
if (!rtc_base) {
- pr_err("Can't map RTC registers");
+ pr_err("Can't map RTC registers\n");
return -ENXIO;
}
diff --git a/drivers/clocksource/time-armada-370-xp.c b/drivers/clocksource/time-armada-370-xp.c
index 4440aef..aea4380 100644
--- a/drivers/clocksource/time-armada-370-xp.c
+++ b/drivers/clocksource/time-armada-370-xp.c
@@ -247,13 +247,13 @@ static int __init armada_370_xp_timer_common_init(struct device_node *np)
timer_base = of_iomap(np, 0);
if (!timer_base) {
- pr_err("Failed to iomap");
+ pr_err("Failed to iomap\n");
return -ENXIO;
}
local_base = of_iomap(np, 1);
if (!local_base) {
- pr_err("Failed to iomap");
+ pr_err("Failed to iomap\n");
return -ENXIO;
}
@@ -298,7 +298,7 @@ static int __init armada_370_xp_timer_common_init(struct device_node *np)
"armada_370_xp_clocksource",
timer_clk, 300, 32, clocksource_mmio_readl_down);
if (res) {
- pr_err("Failed to initialize clocksource mmio");
+ pr_err("Failed to initialize clocksource mmio\n");
return res;
}
@@ -315,7 +315,7 @@ static int __init armada_370_xp_timer_common_init(struct device_node *np)
armada_370_xp_evt);
/* Immediately configure the timer on the boot CPU */
if (res) {
- pr_err("Failed to request percpu irq");
+ pr_err("Failed to request percpu irq\n");
return res;
}
@@ -324,7 +324,7 @@ static int __init armada_370_xp_timer_common_init(struct device_node *np)
armada_370_xp_timer_starting_cpu,
armada_370_xp_timer_dying_cpu);
if (res) {
- pr_err("Failed to setup hotplug state and timer");
+ pr_err("Failed to setup hotplug state and timer\n");
return res;
}
@@ -339,7 +339,7 @@ static int __init armada_xp_timer_init(struct device_node *np)
int ret;
if (IS_ERR(clk)) {
- pr_err("Failed to get clock");
+ pr_err("Failed to get clock\n");
return PTR_ERR(clk);
}
@@ -375,7 +375,7 @@ static int __init armada_375_timer_init(struct device_node *np)
/* Must have at least a clock */
if (IS_ERR(clk)) {
- pr_err("Failed to get clock");
+ pr_err("Failed to get clock\n");
return PTR_ERR(clk);
}
@@ -399,7 +399,7 @@ static int __init armada_370_timer_init(struct device_node *np)
clk = of_clk_get(np, 0);
if (IS_ERR(clk)) {
- pr_err("Failed to get clock");
+ pr_err("Failed to get clock\n");
return PTR_ERR(clk);
}
diff --git a/drivers/clocksource/time-efm32.c b/drivers/clocksource/time-efm32.c
index 5ac344b..ce0f97b 100644
--- a/drivers/clocksource/time-efm32.c
+++ b/drivers/clocksource/time-efm32.c
@@ -235,7 +235,7 @@ static int __init efm32_clockevent_init(struct device_node *np)
ret = setup_irq(irq, &efm32_clock_event_irq);
if (ret) {
- pr_err("Failed setup irq");
+ pr_err("Failed setup irq\n");
goto err_setup_irq;
}
diff --git a/drivers/clocksource/time-orion.c b/drivers/clocksource/time-orion.c
index 7eb2ab0..b9b97f6 100644
--- a/drivers/clocksource/time-orion.c
+++ b/drivers/clocksource/time-orion.c
@@ -141,7 +141,7 @@ static int __init orion_timer_init(struct device_node *np)
ret = clk_prepare_enable(clk);
if (ret) {
- pr_err("Failed to prepare clock");
+ pr_err("Failed to prepare clock\n");
return ret;
}
@@ -165,7 +165,7 @@ static int __init orion_timer_init(struct device_node *np)
"orion_clocksource", rate, 300, 32,
clocksource_mmio_readl_down);
if (ret) {
- pr_err("Failed to initialize mmio timer");
+ pr_err("Failed to initialize mmio timer\n");
return ret;
}
diff --git a/drivers/clocksource/timer-atmel-pit.c b/drivers/clocksource/timer-atmel-pit.c
index c0b5df3..cc11235 100644
--- a/drivers/clocksource/timer-atmel-pit.c
+++ b/drivers/clocksource/timer-atmel-pit.c
@@ -226,7 +226,7 @@ static int __init at91sam926x_pit_dt_init(struct device_node *node)
ret = clocksource_register_hz(&data->clksrc, pit_rate);
if (ret) {
- pr_err("Failed to register clocksource");
+ pr_err("Failed to register clocksource\n");
return ret;
}
diff --git a/drivers/clocksource/timer-digicolor.c b/drivers/clocksource/timer-digicolor.c
index e9f50d2..94a161e 100644
--- a/drivers/clocksource/timer-digicolor.c
+++ b/drivers/clocksource/timer-digicolor.c
@@ -161,19 +161,19 @@ static int __init digicolor_timer_init(struct device_node *node)
*/
dc_timer_dev.base = of_iomap(node, 0);
if (!dc_timer_dev.base) {
- pr_err("Can't map registers");
+ pr_err("Can't map registers\n");
return -ENXIO;
}
irq = irq_of_parse_and_map(node, dc_timer_dev.timer_id);
if (irq <= 0) {
- pr_err("Can't parse IRQ");
+ pr_err("Can't parse IRQ\n");
return -EINVAL;
}
clk = of_clk_get(node, 0);
if (IS_ERR(clk)) {
- pr_err("Can't get timer clock");
+ pr_err("Can't get timer clock\n");
return PTR_ERR(clk);
}
clk_prepare_enable(clk);
diff --git a/drivers/clocksource/timer-integrator-ap.c b/drivers/clocksource/timer-integrator-ap.c
index df6e672..04ad306 100644
--- a/drivers/clocksource/timer-integrator-ap.c
+++ b/drivers/clocksource/timer-integrator-ap.c
@@ -200,7 +200,7 @@ static int __init integrator_ap_timer_init_of(struct device_node *node)
err = of_property_read_string(of_aliases,
"arm,timer-primary", &path);
if (err) {
- pr_warn("Failed to read property");
+ pr_warn("Failed to read property\n");
return err;
}
@@ -209,7 +209,7 @@ static int __init integrator_ap_timer_init_of(struct device_node *node)
err = of_property_read_string(of_aliases,
"arm,timer-secondary", &path);
if (err) {
- pr_warn("Failed to read property");
+ pr_warn("Failed to read property\n");
return err;
}
diff --git a/drivers/clocksource/timer-nps.c b/drivers/clocksource/timer-nps.c
index da1f798..e74ea17 100644
--- a/drivers/clocksource/timer-nps.c
+++ b/drivers/clocksource/timer-nps.c
@@ -55,7 +55,7 @@ static int __init nps_get_timer_clk(struct device_node *node,
*clk = of_clk_get(node, 0);
ret = PTR_ERR_OR_ZERO(*clk);
if (ret) {
- pr_err("timer missing clk");
+ pr_err("timer missing clk\n");
return ret;
}
@@ -247,7 +247,7 @@ static int __init nps_setup_clockevent(struct device_node *node)
nps_timer0_irq = irq_of_parse_and_map(node, 0);
if (nps_timer0_irq <= 0) {
- pr_err("clockevent: missing irq");
+ pr_err("clockevent: missing irq\n");
return -EINVAL;
}
@@ -270,7 +270,7 @@ static int __init nps_setup_clockevent(struct device_node *node)
nps_timer_starting_cpu,
nps_timer_dying_cpu);
if (ret) {
- pr_err("Failed to setup hotplug state");
+ pr_err("Failed to setup hotplug state\n");
clk_disable_unprepare(clk);
free_percpu_irq(nps_timer0_irq, &nps_clockevent_device);
return ret;
diff --git a/drivers/clocksource/timer-prima2.c b/drivers/clocksource/timer-prima2.c
index bfa981a..b4122ed 100644
--- a/drivers/clocksource/timer-prima2.c
+++ b/drivers/clocksource/timer-prima2.c
@@ -196,20 +196,20 @@ static int __init sirfsoc_prima2_timer_init(struct device_node *np)
clk = of_clk_get(np, 0);
if (IS_ERR(clk)) {
- pr_err("Failed to get clock");
+ pr_err("Failed to get clock\n");
return PTR_ERR(clk);
}
ret = clk_prepare_enable(clk);
if (ret) {
- pr_err("Failed to enable clock");
+ pr_err("Failed to enable clock\n");
return ret;
}
rate = clk_get_rate(clk);
if (rate < PRIMA2_CLOCK_FREQ || rate % PRIMA2_CLOCK_FREQ) {
- pr_err("Invalid clock rate");
+ pr_err("Invalid clock rate\n");
return -EINVAL;
}
@@ -229,7 +229,7 @@ static int __init sirfsoc_prima2_timer_init(struct device_node *np)
ret = clocksource_register_hz(&sirfsoc_clocksource, PRIMA2_CLOCK_FREQ);
if (ret) {
- pr_err("Failed to register clocksource");
+ pr_err("Failed to register clocksource\n");
return ret;
}
@@ -237,7 +237,7 @@ static int __init sirfsoc_prima2_timer_init(struct device_node *np)
ret = setup_irq(sirfsoc_timer_irq.irq, &sirfsoc_timer_irq);
if (ret) {
- pr_err("Failed to setup irq");
+ pr_err("Failed to setup irq\n");
return ret;
}
diff --git a/drivers/clocksource/timer-sp804.c b/drivers/clocksource/timer-sp804.c
index d078633..2d575a8c 100644
--- a/drivers/clocksource/timer-sp804.c
+++ b/drivers/clocksource/timer-sp804.c
@@ -299,13 +299,13 @@ static int __init integrator_cp_of_init(struct device_node *np)
base = of_iomap(np, 0);
if (!base) {
- pr_err("Failed to iomap");
+ pr_err("Failed to iomap\n");
return -ENXIO;
}
clk = of_clk_get(np, 0);
if (IS_ERR(clk)) {
- pr_err("Failed to get clock");
+ pr_err("Failed to get clock\n");
return PTR_ERR(clk);
}
diff --git a/drivers/clocksource/timer-sun5i.c b/drivers/clocksource/timer-sun5i.c
index a3e662b..2e9c830 100644
--- a/drivers/clocksource/timer-sun5i.c
+++ b/drivers/clocksource/timer-sun5i.c
@@ -332,19 +332,19 @@ static int __init sun5i_timer_init(struct device_node *node)
timer_base = of_io_request_and_map(node, 0, of_node_full_name(node));
if (IS_ERR(timer_base)) {
- pr_err("Can't map registers");
+ pr_err("Can't map registers\n");
return PTR_ERR(timer_base);;
}
irq = irq_of_parse_and_map(node, 0);
if (irq <= 0) {
- pr_err("Can't parse IRQ");
+ pr_err("Can't parse IRQ\n");
return -EINVAL;
}
clk = of_clk_get(node, 0);
if (IS_ERR(clk)) {
- pr_err("Can't get timer clock");
+ pr_err("Can't get timer clock\n");
return PTR_ERR(clk);
}
diff --git a/drivers/clocksource/vf_pit_timer.c b/drivers/clocksource/vf_pit_timer.c
index 55d8d84..e0849e2 100644
--- a/drivers/clocksource/vf_pit_timer.c
+++ b/drivers/clocksource/vf_pit_timer.c
@@ -165,7 +165,7 @@ static int __init pit_timer_init(struct device_node *np)
timer_base = of_iomap(np, 0);
if (!timer_base) {
- pr_err("Failed to iomap");
+ pr_err("Failed to iomap\n");
return -ENXIO;
}
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* Re: [PATCH 21/29] clocksource: Add missing line break to error messages
2017-04-16 20:27 ` [PATCH 21/29] clocksource: Add missing line break to error messages Daniel Lezcano
@ 2017-04-24 7:45 ` Uwe Kleine-König
0 siblings, 0 replies; 32+ messages in thread
From: Uwe Kleine-König @ 2017-04-24 7:45 UTC (permalink / raw)
To: Daniel Lezcano
Cc: tglx, Mark Rutland, Baruch Siach, Eric Anholt, Thierry Reding,
Rafał Miłecki, Alexandre Courbot, Florian Fainelli,
Kevin Hilman, Lee Jones, Chen-Yu Tsai,
maintainer:BROADCOM BCM281XX/BCM11XXX/BCM216XX ARM ARCHITE...,
Thierry Reding, Stephen Warren, Marc Zyngier, Ray Jui,
moderated list:BROADCOM BCM2835 ARM ARCHITECTURE,
open list:TEGRA ARCHITECTURE SUPPORT,
open list:ARM/Amlogic Meson SoC support,
moderated list:ARM ARCHITECTED TIMER DRIVER, Barry Song,
open list:SYNOPSYS ARC ARCHITECTURE, Scott Branden, Vineet Gupta,
linux-kernel, Uwe Kleine-König, Carlo Caione, Maxime Ripard
Hello,
On Sun, Apr 16, 2017 at 10:27:11PM +0200, Daniel Lezcano wrote:
> drivers/clocksource/time-efm32.c | 2 +-
For efm32:
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
(if it's not too late yet).
For efm32 (and I guess for others, too) this was introduced by the
"Convert init function to return error" series.
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
^ permalink raw reply [flat|nested] 32+ messages in thread
* [PATCH 22/29] dt-bindings: Clarify compatible property for rockchip timers
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (19 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 21/29] clocksource: Add missing line break to error messages Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-20 14:12 ` Rob Herring
2017-04-16 20:27 ` [PATCH 23/29] ARM: dts: rockchip: Update compatible property for rk322x timer Daniel Lezcano
` (6 subsequent siblings)
27 siblings, 1 reply; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Alexander Kochetkov, Rob Herring, Rob Herring,
Mark Rutland, Heiko Stuebner, Huang Tao, Caesar Wang,
open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS,
moderated list:ARM/Rockchip SoC support,
open list:ARM/Rockchip SoC support
From: Alexander Kochetkov <al.kochet@gmail.com>
Make all properties description in form '"rockchip,<chip>-timer",
"rockchip,rk3288-timer"' for all chips found in linux kernel.
Suggested-by: Heiko Stübner <heiko@sntech.de>
Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
.../devicetree/bindings/timer/rockchip,rk-timer.txt | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/timer/rockchip,rk-timer.txt b/Documentation/devicetree/bindings/timer/rockchip,rk-timer.txt
index a41b184..16a5f45 100644
--- a/Documentation/devicetree/bindings/timer/rockchip,rk-timer.txt
+++ b/Documentation/devicetree/bindings/timer/rockchip,rk-timer.txt
@@ -1,9 +1,15 @@
Rockchip rk timer
Required properties:
-- compatible: shall be one of:
- "rockchip,rk3288-timer" - for rk3066, rk3036, rk3188, rk322x, rk3288, rk3368
- "rockchip,rk3399-timer" - for rk3399
+- compatible: should be:
+ "rockchip,rk3036-timer", "rockchip,rk3288-timer": for Rockchip RK3036
+ "rockchip,rk3066-timer", "rockchip,rk3288-timer": for Rockchip RK3066
+ "rockchip,rk3188-timer", "rockchip,rk3288-timer": for Rockchip RK3188
+ "rockchip,rk3228-timer", "rockchip,rk3288-timer": for Rockchip RK3228
+ "rockchip,rk3229-timer", "rockchip,rk3288-timer": for Rockchip RK3229
+ "rockchip,rk3288-timer": for Rockchip RK3288
+ "rockchip,rk3368-timer", "rockchip,rk3288-timer": for Rockchip RK3368
+ "rockchip,rk3399-timer": for Rockchip RK3399
- reg: base address of the timer register starting with TIMERS CONTROL register
- interrupts: should contain the interrupts for Timer0
- clocks : must contain an entry for each entry in clock-names
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* Re: [PATCH 22/29] dt-bindings: Clarify compatible property for rockchip timers
2017-04-16 20:27 ` [PATCH 22/29] dt-bindings: Clarify compatible property for rockchip timers Daniel Lezcano
@ 2017-04-20 14:12 ` Rob Herring
0 siblings, 0 replies; 32+ messages in thread
From: Rob Herring @ 2017-04-20 14:12 UTC (permalink / raw)
To: Daniel Lezcano
Cc: tglx, linux-kernel, Alexander Kochetkov, Mark Rutland,
Heiko Stuebner, Huang Tao, Caesar Wang,
open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS,
moderated list:ARM/Rockchip SoC support,
open list:ARM/Rockchip SoC support
On Sun, Apr 16, 2017 at 10:27:12PM +0200, Daniel Lezcano wrote:
> From: Alexander Kochetkov <al.kochet@gmail.com>
>
> Make all properties description in form '"rockchip,<chip>-timer",
> "rockchip,rk3288-timer"' for all chips found in linux kernel.
>
> Suggested-by: Heiko Stübner <heiko@sntech.de>
> Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
> Acked-by: Rob Herring <robh@kernel.org>
> Reviewed-by: Heiko Stuebner <heiko@sntech.de>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
> ---
> .../devicetree/bindings/timer/rockchip,rk-timer.txt | 12 +++++++++---
> 1 file changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/timer/rockchip,rk-timer.txt b/Documentation/devicetree/bindings/timer/rockchip,rk-timer.txt
> index a41b184..16a5f45 100644
> --- a/Documentation/devicetree/bindings/timer/rockchip,rk-timer.txt
> +++ b/Documentation/devicetree/bindings/timer/rockchip,rk-timer.txt
> @@ -1,9 +1,15 @@
> Rockchip rk timer
>
> Required properties:
> -- compatible: shall be one of:
> - "rockchip,rk3288-timer" - for rk3066, rk3036, rk3188, rk322x, rk3288, rk3368
> - "rockchip,rk3399-timer" - for rk3399
> +- compatible: should be:
should be one of:
> + "rockchip,rk3036-timer", "rockchip,rk3288-timer": for Rockchip RK3036
> + "rockchip,rk3066-timer", "rockchip,rk3288-timer": for Rockchip RK3066
> + "rockchip,rk3188-timer", "rockchip,rk3288-timer": for Rockchip RK3188
> + "rockchip,rk3228-timer", "rockchip,rk3288-timer": for Rockchip RK3228
> + "rockchip,rk3229-timer", "rockchip,rk3288-timer": for Rockchip RK3229
> + "rockchip,rk3288-timer": for Rockchip RK3288
> + "rockchip,rk3368-timer", "rockchip,rk3288-timer": for Rockchip RK3368
> + "rockchip,rk3399-timer": for Rockchip RK3399
I find the "for Rockchip RKxxxx" a bit redundant, but it's fine with or
without. Otherwise,
Acked-by: Rob Herring <robh@kernel.org>
^ permalink raw reply [flat|nested] 32+ messages in thread
* [PATCH 23/29] ARM: dts: rockchip: Update compatible property for rk322x timer
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (20 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 22/29] dt-bindings: Clarify compatible property for rockchip timers Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 24/29] clocksource/drivers/rockchip_timer: Implement clocksource timer Daniel Lezcano
` (5 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Alexander Kochetkov, Heiko Stuebner, Rob Herring,
Mark Rutland, Russell King,
moderated list:ARM/Rockchip SoC support,
open list:ARM/Rockchip SoC support,
open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS
From: Alexander Kochetkov <al.kochet@gmail.com>
Property set to '"rockchip,rk3228-timer", "rockchip,rk3288-timer"'
to match devicetree bindings.
Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
Suggested-by: Heiko Stübner <heiko@sntech.de>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
arch/arm/boot/dts/rk322x.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/rk322x.dtsi b/arch/arm/boot/dts/rk322x.dtsi
index 9dff822..641607d 100644
--- a/arch/arm/boot/dts/rk322x.dtsi
+++ b/arch/arm/boot/dts/rk322x.dtsi
@@ -325,7 +325,7 @@
};
timer: timer@110c0000 {
- compatible = "rockchip,rk3288-timer";
+ compatible = "rockchip,rk3228-timer", "rockchip,rk3288-timer";
reg = <0x110c0000 0x20>;
interrupts = <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&xin24m>, <&cru PCLK_TIMER>;
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 24/29] clocksource/drivers/rockchip_timer: Implement clocksource timer
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (21 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 23/29] ARM: dts: rockchip: Update compatible property for rk322x timer Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 25/29] ARM: dts: rockchip: Add timer entries to rk3188 SoC Daniel Lezcano
` (4 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Alexander Kochetkov, Heiko Stuebner,
moderated list:ARM/Rockchip SoC support,
open list:ARM/Rockchip SoC support
From: Alexander Kochetkov <al.kochet@gmail.com>
The clock supplying the arm-global-timer on the rk3188 is coming from the
the cpu clock itself and thus changes its rate everytime cpufreq adjusts
the cpu frequency making this timer unsuitable as a stable clocksource
and sched clock.
The rk3188, rk3288 and following socs share a separate timer block already
handled by the rockchip-timer driver. Therefore adapt this driver to also
be able to act as clocksource and sched clock on rk3188.
In order to test clocksource you can run following commands and check
how much time it take in real. On rk3188 it take about ~45 seconds.
cpufreq-set -f 1.6GHZ
date; sleep 60; date
In order to use the patch you need to declare two timers in the dts
file. The first timer will be initialized as clockevent provider
and the second one as clocksource. The clockevent must be from
alive subsystem as it used as backup for the local timers at sleep
time.
The patch does not break compatibility with older device tree files.
The older device tree files contain only one timer. The timer
will be initialized as clockevent, as expected.
rk3288 (and probably anything newer) is irrelevant to this patch,
as it has the arch timer interface. This patch may be useful
for Cortex-A9/A5 based parts.
Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/clocksource/Kconfig | 1 +
drivers/clocksource/rockchip_timer.c | 218 +++++++++++++++++++++++++----------
2 files changed, 158 insertions(+), 61 deletions(-)
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 3356ab8..483f3b1 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -81,6 +81,7 @@ config ROCKCHIP_TIMER
bool "Rockchip timer driver" if COMPILE_TEST
depends on ARM || ARM64
select CLKSRC_OF
+ select CLKSRC_MMIO
help
Enables the support for the rockchip timer driver.
diff --git a/drivers/clocksource/rockchip_timer.c b/drivers/clocksource/rockchip_timer.c
index 23e267a..49c02be 100644
--- a/drivers/clocksource/rockchip_timer.c
+++ b/drivers/clocksource/rockchip_timer.c
@@ -11,6 +11,8 @@
#include <linux/clockchips.h>
#include <linux/init.h>
#include <linux/interrupt.h>
+#include <linux/sched_clock.h>
+#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
@@ -19,6 +21,8 @@
#define TIMER_LOAD_COUNT0 0x00
#define TIMER_LOAD_COUNT1 0x04
+#define TIMER_CURRENT_VALUE0 0x08
+#define TIMER_CURRENT_VALUE1 0x0C
#define TIMER_CONTROL_REG3288 0x10
#define TIMER_CONTROL_REG3399 0x1c
#define TIMER_INT_STATUS 0x18
@@ -29,103 +33,118 @@
#define TIMER_MODE_USER_DEFINED_COUNT (1 << 1)
#define TIMER_INT_UNMASK (1 << 2)
-struct bc_timer {
- struct clock_event_device ce;
+struct rk_timer {
void __iomem *base;
void __iomem *ctrl;
+ struct clk *clk;
+ struct clk *pclk;
u32 freq;
+ int irq;
};
-static struct bc_timer bc_timer;
-
-static inline struct bc_timer *rk_timer(struct clock_event_device *ce)
-{
- return container_of(ce, struct bc_timer, ce);
-}
+struct rk_clkevt {
+ struct clock_event_device ce;
+ struct rk_timer timer;
+};
-static inline void __iomem *rk_base(struct clock_event_device *ce)
-{
- return rk_timer(ce)->base;
-}
+static struct rk_clkevt *rk_clkevt;
+static struct rk_timer *rk_clksrc;
-static inline void __iomem *rk_ctrl(struct clock_event_device *ce)
+static inline struct rk_timer *rk_timer(struct clock_event_device *ce)
{
- return rk_timer(ce)->ctrl;
+ return &container_of(ce, struct rk_clkevt, ce)->timer;
}
-static inline void rk_timer_disable(struct clock_event_device *ce)
+static inline void rk_timer_disable(struct rk_timer *timer)
{
- writel_relaxed(TIMER_DISABLE, rk_ctrl(ce));
+ writel_relaxed(TIMER_DISABLE, timer->ctrl);
}
-static inline void rk_timer_enable(struct clock_event_device *ce, u32 flags)
+static inline void rk_timer_enable(struct rk_timer *timer, u32 flags)
{
- writel_relaxed(TIMER_ENABLE | TIMER_INT_UNMASK | flags,
- rk_ctrl(ce));
+ writel_relaxed(TIMER_ENABLE | flags, timer->ctrl);
}
static void rk_timer_update_counter(unsigned long cycles,
- struct clock_event_device *ce)
+ struct rk_timer *timer)
{
- writel_relaxed(cycles, rk_base(ce) + TIMER_LOAD_COUNT0);
- writel_relaxed(0, rk_base(ce) + TIMER_LOAD_COUNT1);
+ writel_relaxed(cycles, timer->base + TIMER_LOAD_COUNT0);
+ writel_relaxed(0, timer->base + TIMER_LOAD_COUNT1);
}
-static void rk_timer_interrupt_clear(struct clock_event_device *ce)
+static void rk_timer_interrupt_clear(struct rk_timer *timer)
{
- writel_relaxed(1, rk_base(ce) + TIMER_INT_STATUS);
+ writel_relaxed(1, timer->base + TIMER_INT_STATUS);
}
static inline int rk_timer_set_next_event(unsigned long cycles,
struct clock_event_device *ce)
{
- rk_timer_disable(ce);
- rk_timer_update_counter(cycles, ce);
- rk_timer_enable(ce, TIMER_MODE_USER_DEFINED_COUNT);
+ struct rk_timer *timer = rk_timer(ce);
+
+ rk_timer_disable(timer);
+ rk_timer_update_counter(cycles, timer);
+ rk_timer_enable(timer, TIMER_MODE_USER_DEFINED_COUNT |
+ TIMER_INT_UNMASK);
return 0;
}
static int rk_timer_shutdown(struct clock_event_device *ce)
{
- rk_timer_disable(ce);
+ struct rk_timer *timer = rk_timer(ce);
+
+ rk_timer_disable(timer);
return 0;
}
static int rk_timer_set_periodic(struct clock_event_device *ce)
{
- rk_timer_disable(ce);
- rk_timer_update_counter(rk_timer(ce)->freq / HZ - 1, ce);
- rk_timer_enable(ce, TIMER_MODE_FREE_RUNNING);
+ struct rk_timer *timer = rk_timer(ce);
+
+ rk_timer_disable(timer);
+ rk_timer_update_counter(timer->freq / HZ - 1, timer);
+ rk_timer_enable(timer, TIMER_MODE_FREE_RUNNING | TIMER_INT_UNMASK);
return 0;
}
static irqreturn_t rk_timer_interrupt(int irq, void *dev_id)
{
struct clock_event_device *ce = dev_id;
+ struct rk_timer *timer = rk_timer(ce);
- rk_timer_interrupt_clear(ce);
+ rk_timer_interrupt_clear(timer);
if (clockevent_state_oneshot(ce))
- rk_timer_disable(ce);
+ rk_timer_disable(timer);
ce->event_handler(ce);
return IRQ_HANDLED;
}
-static int __init rk_timer_init(struct device_node *np, u32 ctrl_reg)
+static u64 notrace rk_timer_sched_read(void)
+{
+ return ~readl_relaxed(rk_clksrc->base + TIMER_CURRENT_VALUE0);
+}
+
+static int __init
+rk_timer_probe(struct rk_timer *timer, struct device_node *np)
{
- struct clock_event_device *ce = &bc_timer.ce;
struct clk *timer_clk;
struct clk *pclk;
int ret = -EINVAL, irq;
+ u32 ctrl_reg = TIMER_CONTROL_REG3288;
- bc_timer.base = of_iomap(np, 0);
- if (!bc_timer.base) {
+ timer->base = of_iomap(np, 0);
+ if (!timer->base) {
pr_err("Failed to get base address for '%s'\n", TIMER_NAME);
return -ENXIO;
}
- bc_timer.ctrl = bc_timer.base + ctrl_reg;
+
+ if (of_device_is_compatible(np, "rockchip,rk3399-timer"))
+ ctrl_reg = TIMER_CONTROL_REG3399;
+
+ timer->ctrl = timer->base + ctrl_reg;
pclk = of_clk_get_by_name(np, "pclk");
if (IS_ERR(pclk)) {
@@ -139,6 +158,7 @@ static int __init rk_timer_init(struct device_node *np, u32 ctrl_reg)
pr_err("Failed to enable pclk for '%s'\n", TIMER_NAME);
goto out_unmap;
}
+ timer->pclk = pclk;
timer_clk = of_clk_get_by_name(np, "timer");
if (IS_ERR(timer_clk)) {
@@ -152,8 +172,9 @@ static int __init rk_timer_init(struct device_node *np, u32 ctrl_reg)
pr_err("Failed to enable timer clock\n");
goto out_timer_clk;
}
+ timer->clk = timer_clk;
- bc_timer.freq = clk_get_rate(timer_clk);
+ timer->freq = clk_get_rate(timer_clk);
irq = irq_of_parse_and_map(np, 0);
if (!irq) {
@@ -161,51 +182,126 @@ static int __init rk_timer_init(struct device_node *np, u32 ctrl_reg)
pr_err("Failed to map interrupts for '%s'\n", TIMER_NAME);
goto out_irq;
}
+ timer->irq = irq;
+
+ rk_timer_interrupt_clear(timer);
+ rk_timer_disable(timer);
+ return 0;
+
+out_irq:
+ clk_disable_unprepare(timer_clk);
+out_timer_clk:
+ clk_disable_unprepare(pclk);
+out_unmap:
+ iounmap(timer->base);
+
+ return ret;
+}
+
+static void __init rk_timer_cleanup(struct rk_timer *timer)
+{
+ clk_disable_unprepare(timer->clk);
+ clk_disable_unprepare(timer->pclk);
+ iounmap(timer->base);
+}
+
+static int __init rk_clkevt_init(struct device_node *np)
+{
+ struct clock_event_device *ce;
+ int ret = -EINVAL;
+
+ rk_clkevt = kzalloc(sizeof(struct rk_clkevt), GFP_KERNEL);
+ if (!rk_clkevt) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ ret = rk_timer_probe(&rk_clkevt->timer, np);
+ if (ret)
+ goto out_probe;
+
+ ce = &rk_clkevt->ce;
ce->name = TIMER_NAME;
ce->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT |
CLOCK_EVT_FEAT_DYNIRQ;
ce->set_next_event = rk_timer_set_next_event;
ce->set_state_shutdown = rk_timer_shutdown;
ce->set_state_periodic = rk_timer_set_periodic;
- ce->irq = irq;
+ ce->irq = rk_clkevt->timer.irq;
ce->cpumask = cpu_possible_mask;
ce->rating = 250;
- rk_timer_interrupt_clear(ce);
- rk_timer_disable(ce);
-
- ret = request_irq(irq, rk_timer_interrupt, IRQF_TIMER, TIMER_NAME, ce);
+ ret = request_irq(rk_clkevt->timer.irq, rk_timer_interrupt, IRQF_TIMER,
+ TIMER_NAME, ce);
if (ret) {
- pr_err("Failed to initialize '%s': %d\n", TIMER_NAME, ret);
+ pr_err("Failed to initialize '%s': %d\n",
+ TIMER_NAME, ret);
goto out_irq;
}
- clockevents_config_and_register(ce, bc_timer.freq, 1, UINT_MAX);
-
+ clockevents_config_and_register(&rk_clkevt->ce,
+ rk_clkevt->timer.freq, 1, UINT_MAX);
return 0;
out_irq:
- clk_disable_unprepare(timer_clk);
-out_timer_clk:
- clk_disable_unprepare(pclk);
-out_unmap:
- iounmap(bc_timer.base);
-
+ rk_timer_cleanup(&rk_clkevt->timer);
+out_probe:
+ kfree(rk_clkevt);
+out:
+ /* Leave rk_clkevt not NULL to prevent future init */
+ rk_clkevt = ERR_PTR(ret);
return ret;
}
-static int __init rk3288_timer_init(struct device_node *np)
+static int __init rk_clksrc_init(struct device_node *np)
{
- return rk_timer_init(np, TIMER_CONTROL_REG3288);
+ int ret = -EINVAL;
+
+ rk_clksrc = kzalloc(sizeof(struct rk_timer), GFP_KERNEL);
+ if (!rk_clksrc) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = rk_timer_probe(rk_clksrc, np);
+ if (ret)
+ goto out_probe;
+
+ rk_timer_update_counter(UINT_MAX, rk_clksrc);
+ rk_timer_enable(rk_clksrc, 0);
+
+ ret = clocksource_mmio_init(rk_clksrc->base + TIMER_CURRENT_VALUE0,
+ TIMER_NAME, rk_clksrc->freq, 250, 32,
+ clocksource_mmio_readl_down);
+ if (ret) {
+ pr_err("Failed to register clocksource");
+ goto out_clocksource;
+ }
+
+ sched_clock_register(rk_timer_sched_read, 32, rk_clksrc->freq);
+ return 0;
+
+out_clocksource:
+ rk_timer_cleanup(rk_clksrc);
+out_probe:
+ kfree(rk_clksrc);
+out:
+ /* Leave rk_clksrc not NULL to prevent future init */
+ rk_clksrc = ERR_PTR(ret);
+ return ret;
}
-static int __init rk3399_timer_init(struct device_node *np)
+static int __init rk_timer_init(struct device_node *np)
{
- return rk_timer_init(np, TIMER_CONTROL_REG3399);
+ if (!rk_clkevt)
+ return rk_clkevt_init(np);
+
+ if (!rk_clksrc)
+ return rk_clksrc_init(np);
+
+ pr_err("Too many timer definitions for '%s'\n", TIMER_NAME);
+ return -EINVAL;
}
-CLOCKSOURCE_OF_DECLARE(rk3288_timer, "rockchip,rk3288-timer",
- rk3288_timer_init);
-CLOCKSOURCE_OF_DECLARE(rk3399_timer, "rockchip,rk3399-timer",
- rk3399_timer_init);
+CLOCKSOURCE_OF_DECLARE(rk3288_timer, "rockchip,rk3288-timer", rk_timer_init);
+CLOCKSOURCE_OF_DECLARE(rk3399_timer, "rockchip,rk3399-timer", rk_timer_init);
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 25/29] ARM: dts: rockchip: Add timer entries to rk3188 SoC
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (22 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 24/29] clocksource/drivers/rockchip_timer: Implement clocksource timer Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 26/29] ARM: dts: rockchip: disable arm-global-timer for rk3188 Daniel Lezcano
` (3 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Alexander Kochetkov, Heiko Stuebner, Rob Herring,
Mark Rutland, Russell King,
moderated list:ARM/Rockchip SoC support,
open list:ARM/Rockchip SoC support,
open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS
From: Alexander Kochetkov <al.kochet@gmail.com>
The patch add two timers to all rk3188 based boards.
The first timer is from alive subsystem and it act as a backup
for the local timers at sleep time. It act the same as other
SoC rockchip timers already present in kernel.
The second timer is from CPU subsystem and act as replacement
for the arm-global-timer clocksource and sched clock. It run
at stable frequency 24MHz.
Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
---
arch/arm/boot/dts/rk3188.dtsi | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/arch/arm/boot/dts/rk3188.dtsi b/arch/arm/boot/dts/rk3188.dtsi
index cf91254..8428fae 100644
--- a/arch/arm/boot/dts/rk3188.dtsi
+++ b/arch/arm/boot/dts/rk3188.dtsi
@@ -106,6 +106,22 @@
};
};
+ timer3: timer@2000e000 {
+ compatible = "rockchip,rk3188-timer", "rockchip,rk3288-timer";
+ reg = <0x2000e000 0x20>;
+ interrupts = <GIC_SPI 46 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&cru SCLK_TIMER3>, <&cru PCLK_TIMER3>;
+ clock-names = "timer", "pclk";
+ };
+
+ timer6: timer@200380a0 {
+ compatible = "rockchip,rk3188-timer", "rockchip,rk3288-timer";
+ reg = <0x200380a0 0x20>;
+ interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&cru SCLK_TIMER6>, <&cru PCLK_TIMER0>;
+ clock-names = "timer", "pclk";
+ };
+
i2s0: i2s@1011a000 {
compatible = "rockchip,rk3188-i2s", "rockchip,rk3066-i2s";
reg = <0x1011a000 0x2000>;
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 26/29] ARM: dts: rockchip: disable arm-global-timer for rk3188
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (23 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 25/29] ARM: dts: rockchip: Add timer entries to rk3188 SoC Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 27/29] clocksource: Augment bindings for Faraday timer Daniel Lezcano
` (2 subsequent siblings)
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Alexander Kochetkov, Heiko Stuebner, Rob Herring,
Mark Rutland, Russell King,
moderated list:ARM/Rockchip SoC support,
open list:ARM/Rockchip SoC support,
open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS
From: Alexander Kochetkov <al.kochet@gmail.com>
The clocksource and the sched_clock provided by the arm_global_timer
are quite unstable because their rates depend on the cpu frequency.
On the other side, the arm_global_timer has a higher rating than the
rockchip_timer, it will be selected by default by the time framework
while we want to use the stable rockchip clocksource.
Let's disable the arm_global_timer in order to have the rockchip
clocksource selected by default.
Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
---
arch/arm/boot/dts/rk3188.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/boot/dts/rk3188.dtsi b/arch/arm/boot/dts/rk3188.dtsi
index 8428fae..1aff4ad2 100644
--- a/arch/arm/boot/dts/rk3188.dtsi
+++ b/arch/arm/boot/dts/rk3188.dtsi
@@ -546,6 +546,7 @@
&global_timer {
interrupts = <GIC_PPI 11 0xf04>;
+ status = "disabled";
};
&local_timer {
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 27/29] clocksource: Augment bindings for Faraday timer
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (24 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 26/29] ARM: dts: rockchip: disable arm-global-timer for rk3188 Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 28/29] clocksource/drivers/gemini: Rename Gemini timer to Faraday Daniel Lezcano
2017-04-16 20:27 ` [PATCH 29/29] clocksource/drivers/fttmr010: Refactor to handle clock Daniel Lezcano
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, Linus Walleij, Rob Herring, Rob Herring,
Mark Rutland,
open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS
From: Linus Walleij <linus.walleij@linaro.org>
It turns out that the Cortina Gemini timer block is just a
standard IP block from Faraday Technology named FTTMR010.
In order to make things clear and understandable, we rename the
bindings with a Faraday compatible as primary and the Cortina
gemini as a more specific case.
For the plain Faraday timer we require two clock references,
while the Gemini can keep it's syscon lookup pattern.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
---
.../bindings/timer/cortina,gemini-timer.txt | 22 ---------------
.../devicetree/bindings/timer/faraday,fttmr010.txt | 33 ++++++++++++++++++++++
2 files changed, 33 insertions(+), 22 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/timer/cortina,gemini-timer.txt
create mode 100644 Documentation/devicetree/bindings/timer/faraday,fttmr010.txt
diff --git a/Documentation/devicetree/bindings/timer/cortina,gemini-timer.txt b/Documentation/devicetree/bindings/timer/cortina,gemini-timer.txt
deleted file mode 100644
index 16ea1d3..0000000
--- a/Documentation/devicetree/bindings/timer/cortina,gemini-timer.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-Cortina Systems Gemini timer
-
-This timer is embedded in the Cortina Systems Gemini SoCs.
-
-Required properties:
-
-- compatible : Must be "cortina,gemini-timer"
-- reg : Should contain registers location and length
-- interrupts : Should contain the three timer interrupts with
- flags for rising edge
-- syscon : a phandle to the global Gemini system controller
-
-Example:
-
-timer@43000000 {
- compatible = "cortina,gemini-timer";
- reg = <0x43000000 0x1000>;
- interrupts = <14 IRQ_TYPE_EDGE_RISING>, /* Timer 1 */
- <15 IRQ_TYPE_EDGE_RISING>, /* Timer 2 */
- <16 IRQ_TYPE_EDGE_RISING>; /* Timer 3 */
- syscon = <&syscon>;
-};
diff --git a/Documentation/devicetree/bindings/timer/faraday,fttmr010.txt b/Documentation/devicetree/bindings/timer/faraday,fttmr010.txt
new file mode 100644
index 0000000..b73ca6c
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/faraday,fttmr010.txt
@@ -0,0 +1,33 @@
+Faraday Technology timer
+
+This timer is a generic IP block from Faraday Technology, embedded in the
+Cortina Systems Gemini SoCs and other designs.
+
+Required properties:
+
+- compatible : Must be one of
+ "faraday,fttmr010"
+ "cortina,gemini-timer"
+- reg : Should contain registers location and length
+- interrupts : Should contain the three timer interrupts usually with
+ flags for falling edge
+
+Optionally required properties:
+
+- clocks : a clock to provide the tick rate for "faraday,fttmr010"
+- clock-names : should be "EXTCLK" and "PCLK" for the external tick timer
+ and peripheral clock respectively, for "faraday,fttmr010"
+- syscon : a phandle to the global Gemini system controller if the compatible
+ type is "cortina,gemini-timer"
+
+Example:
+
+timer@43000000 {
+ compatible = "faraday,fttmr010";
+ reg = <0x43000000 0x1000>;
+ interrupts = <14 IRQ_TYPE_EDGE_FALLING>, /* Timer 1 */
+ <15 IRQ_TYPE_EDGE_FALLING>, /* Timer 2 */
+ <16 IRQ_TYPE_EDGE_FALLING>; /* Timer 3 */
+ clocks = <&extclk>, <&pclk>;
+ clock-names = "EXTCLK", "PCLK";
+};
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 28/29] clocksource/drivers/gemini: Rename Gemini timer to Faraday
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (25 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 27/29] clocksource: Augment bindings for Faraday timer Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
2017-04-16 20:27 ` [PATCH 29/29] clocksource/drivers/fttmr010: Refactor to handle clock Daniel Lezcano
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx; +Cc: linux-kernel, Linus Walleij
From: Linus Walleij <linus.walleij@linaro.org>
After some research it turns out that the "Gemini" timer is
actually a generic IP block from Faraday Technology named
FTTMR010, so as to not make things too confusing we need to
rename the driver and its symbols to make sense.
The implementation remains the same in this patch but we fix
the copy-paste error in the timer name "nomadik_mtu" as we're
at it.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/clocksource/Kconfig | 7 +-
drivers/clocksource/Makefile | 2 +-
drivers/clocksource/timer-fttmr010.c | 276 ++++++++++++++++++++++++++++++++++
drivers/clocksource/timer-gemini.c | 277 -----------------------------------
4 files changed, 281 insertions(+), 281 deletions(-)
create mode 100644 drivers/clocksource/timer-fttmr010.c
delete mode 100644 drivers/clocksource/timer-gemini.c
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 483f3b1..7ca2c24 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -67,15 +67,16 @@ config DW_APB_TIMER_OF
select DW_APB_TIMER
select CLKSRC_OF
-config GEMINI_TIMER
- bool "Cortina Gemini timer driver" if COMPILE_TEST
+config FTTMR010_TIMER
+ bool "Faraday Technology timer driver" if COMPILE_TEST
depends on GENERIC_CLOCKEVENTS
depends on HAS_IOMEM
select CLKSRC_MMIO
select CLKSRC_OF
select MFD_SYSCON
help
- Enables support for the Gemini timer
+ Enables support for the Faraday Technology timer block
+ FTTMR010.
config ROCKCHIP_TIMER
bool "Rockchip timer driver" if COMPILE_TEST
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index d227d13..2b5b56a 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -17,7 +17,7 @@ obj-$(CONFIG_CLKSRC_MMIO) += mmio.o
obj-$(CONFIG_DIGICOLOR_TIMER) += timer-digicolor.o
obj-$(CONFIG_DW_APB_TIMER) += dw_apb_timer.o
obj-$(CONFIG_DW_APB_TIMER_OF) += dw_apb_timer_of.o
-obj-$(CONFIG_GEMINI_TIMER) += timer-gemini.o
+obj-$(CONFIG_FTTMR010_TIMER) += timer-fttmr010.o
obj-$(CONFIG_ROCKCHIP_TIMER) += rockchip_timer.o
obj-$(CONFIG_CLKSRC_NOMADIK_MTU) += nomadik-mtu.o
obj-$(CONFIG_CLKSRC_DBX500_PRCMU) += clksrc-dbx500-prcmu.o
diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c
new file mode 100644
index 0000000..e37ec3d
--- /dev/null
+++ b/drivers/clocksource/timer-fttmr010.c
@@ -0,0 +1,276 @@
+/*
+ * Faraday Technology FTTMR010 timer driver
+ * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org>
+ *
+ * Based on a rewrite of arch/arm/mach-gemini/timer.c:
+ * Copyright (C) 2001-2006 Storlink, Corp.
+ * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
+ */
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+#include <linux/clockchips.h>
+#include <linux/clocksource.h>
+#include <linux/sched_clock.h>
+
+/*
+ * Relevant registers in the global syscon
+ */
+#define GLOBAL_STATUS 0x04
+#define CPU_AHB_RATIO_MASK (0x3 << 18)
+#define CPU_AHB_1_1 (0x0 << 18)
+#define CPU_AHB_3_2 (0x1 << 18)
+#define CPU_AHB_24_13 (0x2 << 18)
+#define CPU_AHB_2_1 (0x3 << 18)
+#define REG_TO_AHB_SPEED(reg) ((((reg) >> 15) & 0x7) * 10 + 130)
+
+/*
+ * Register definitions for the timers
+ */
+#define TIMER1_COUNT (0x00)
+#define TIMER1_LOAD (0x04)
+#define TIMER1_MATCH1 (0x08)
+#define TIMER1_MATCH2 (0x0c)
+#define TIMER2_COUNT (0x10)
+#define TIMER2_LOAD (0x14)
+#define TIMER2_MATCH1 (0x18)
+#define TIMER2_MATCH2 (0x1c)
+#define TIMER3_COUNT (0x20)
+#define TIMER3_LOAD (0x24)
+#define TIMER3_MATCH1 (0x28)
+#define TIMER3_MATCH2 (0x2c)
+#define TIMER_CR (0x30)
+#define TIMER_INTR_STATE (0x34)
+#define TIMER_INTR_MASK (0x38)
+
+#define TIMER_1_CR_ENABLE (1 << 0)
+#define TIMER_1_CR_CLOCK (1 << 1)
+#define TIMER_1_CR_INT (1 << 2)
+#define TIMER_2_CR_ENABLE (1 << 3)
+#define TIMER_2_CR_CLOCK (1 << 4)
+#define TIMER_2_CR_INT (1 << 5)
+#define TIMER_3_CR_ENABLE (1 << 6)
+#define TIMER_3_CR_CLOCK (1 << 7)
+#define TIMER_3_CR_INT (1 << 8)
+#define TIMER_1_CR_UPDOWN (1 << 9)
+#define TIMER_2_CR_UPDOWN (1 << 10)
+#define TIMER_3_CR_UPDOWN (1 << 11)
+#define TIMER_DEFAULT_FLAGS (TIMER_1_CR_UPDOWN | \
+ TIMER_3_CR_ENABLE | \
+ TIMER_3_CR_UPDOWN)
+
+#define TIMER_1_INT_MATCH1 (1 << 0)
+#define TIMER_1_INT_MATCH2 (1 << 1)
+#define TIMER_1_INT_OVERFLOW (1 << 2)
+#define TIMER_2_INT_MATCH1 (1 << 3)
+#define TIMER_2_INT_MATCH2 (1 << 4)
+#define TIMER_2_INT_OVERFLOW (1 << 5)
+#define TIMER_3_INT_MATCH1 (1 << 6)
+#define TIMER_3_INT_MATCH2 (1 << 7)
+#define TIMER_3_INT_OVERFLOW (1 << 8)
+#define TIMER_INT_ALL_MASK 0x1ff
+
+static unsigned int tick_rate;
+static void __iomem *base;
+
+static u64 notrace fttmr010_read_sched_clock(void)
+{
+ return readl(base + TIMER3_COUNT);
+}
+
+static int fttmr010_timer_set_next_event(unsigned long cycles,
+ struct clock_event_device *evt)
+{
+ u32 cr;
+
+ /* Setup the match register */
+ cr = readl(base + TIMER1_COUNT);
+ writel(cr + cycles, base + TIMER1_MATCH1);
+ if (readl(base + TIMER1_COUNT) - cr > cycles)
+ return -ETIME;
+
+ return 0;
+}
+
+static int fttmr010_timer_shutdown(struct clock_event_device *evt)
+{
+ u32 cr;
+
+ /*
+ * Disable also for oneshot: the set_next() call will arm the timer
+ * instead.
+ */
+ /* Stop timer and interrupt. */
+ cr = readl(base + TIMER_CR);
+ cr &= ~(TIMER_1_CR_ENABLE | TIMER_1_CR_INT);
+ writel(cr, base + TIMER_CR);
+
+ /* Setup counter start from 0 */
+ writel(0, base + TIMER1_COUNT);
+ writel(0, base + TIMER1_LOAD);
+
+ /* enable interrupt */
+ cr = readl(base + TIMER_INTR_MASK);
+ cr &= ~(TIMER_1_INT_OVERFLOW | TIMER_1_INT_MATCH2);
+ cr |= TIMER_1_INT_MATCH1;
+ writel(cr, base + TIMER_INTR_MASK);
+
+ /* start the timer */
+ cr = readl(base + TIMER_CR);
+ cr |= TIMER_1_CR_ENABLE;
+ writel(cr, base + TIMER_CR);
+
+ return 0;
+}
+
+static int fttmr010_timer_set_periodic(struct clock_event_device *evt)
+{
+ u32 period = DIV_ROUND_CLOSEST(tick_rate, HZ);
+ u32 cr;
+
+ /* Stop timer and interrupt */
+ cr = readl(base + TIMER_CR);
+ cr &= ~(TIMER_1_CR_ENABLE | TIMER_1_CR_INT);
+ writel(cr, base + TIMER_CR);
+
+ /* Setup timer to fire at 1/HT intervals. */
+ cr = 0xffffffff - (period - 1);
+ writel(cr, base + TIMER1_COUNT);
+ writel(cr, base + TIMER1_LOAD);
+
+ /* enable interrupt on overflow */
+ cr = readl(base + TIMER_INTR_MASK);
+ cr &= ~(TIMER_1_INT_MATCH1 | TIMER_1_INT_MATCH2);
+ cr |= TIMER_1_INT_OVERFLOW;
+ writel(cr, base + TIMER_INTR_MASK);
+
+ /* Start the timer */
+ cr = readl(base + TIMER_CR);
+ cr |= TIMER_1_CR_ENABLE;
+ cr |= TIMER_1_CR_INT;
+ writel(cr, base + TIMER_CR);
+
+ return 0;
+}
+
+/* Use TIMER1 as clock event */
+static struct clock_event_device fttmr010_clockevent = {
+ .name = "TIMER1",
+ /* Reasonably fast and accurate clock event */
+ .rating = 300,
+ .shift = 32,
+ .features = CLOCK_EVT_FEAT_PERIODIC |
+ CLOCK_EVT_FEAT_ONESHOT,
+ .set_next_event = fttmr010_timer_set_next_event,
+ .set_state_shutdown = fttmr010_timer_shutdown,
+ .set_state_periodic = fttmr010_timer_set_periodic,
+ .set_state_oneshot = fttmr010_timer_shutdown,
+ .tick_resume = fttmr010_timer_shutdown,
+};
+
+/*
+ * IRQ handler for the timer
+ */
+static irqreturn_t fttmr010_timer_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *evt = &fttmr010_clockevent;
+
+ evt->event_handler(evt);
+ return IRQ_HANDLED;
+}
+
+static struct irqaction fttmr010_timer_irq = {
+ .name = "Faraday FTTMR010 Timer Tick",
+ .flags = IRQF_TIMER,
+ .handler = fttmr010_timer_interrupt,
+};
+
+static int __init gemini_timer_of_init(struct device_node *np)
+{
+ static struct regmap *map;
+ int irq;
+ int ret;
+ u32 val;
+
+ map = syscon_regmap_lookup_by_phandle(np, "syscon");
+ if (IS_ERR(map)) {
+ pr_err("Can't get regmap for syscon handle");
+ return -ENODEV;
+ }
+ ret = regmap_read(map, GLOBAL_STATUS, &val);
+ if (ret) {
+ pr_err("Can't read syscon status register");
+ return -ENXIO;
+ }
+
+ base = of_iomap(np, 0);
+ if (!base) {
+ pr_err("Can't remap registers");
+ return -ENXIO;
+ }
+ /* IRQ for timer 1 */
+ irq = irq_of_parse_and_map(np, 0);
+ if (irq <= 0) {
+ pr_err("Can't parse IRQ");
+ return -EINVAL;
+ }
+
+ tick_rate = REG_TO_AHB_SPEED(val) * 1000000;
+ printk(KERN_INFO "Bus: %dMHz", tick_rate / 1000000);
+
+ tick_rate /= 6; /* APB bus run AHB*(1/6) */
+
+ switch (val & CPU_AHB_RATIO_MASK) {
+ case CPU_AHB_1_1:
+ printk(KERN_CONT "(1/1)\n");
+ break;
+ case CPU_AHB_3_2:
+ printk(KERN_CONT "(3/2)\n");
+ break;
+ case CPU_AHB_24_13:
+ printk(KERN_CONT "(24/13)\n");
+ break;
+ case CPU_AHB_2_1:
+ printk(KERN_CONT "(2/1)\n");
+ break;
+ }
+
+ /*
+ * Reset the interrupt mask and status
+ */
+ writel(TIMER_INT_ALL_MASK, base + TIMER_INTR_MASK);
+ writel(0, base + TIMER_INTR_STATE);
+ writel(TIMER_DEFAULT_FLAGS, base + TIMER_CR);
+
+ /*
+ * Setup free-running clocksource timer (interrupts
+ * disabled.)
+ */
+ writel(0, base + TIMER3_COUNT);
+ writel(0, base + TIMER3_LOAD);
+ writel(0, base + TIMER3_MATCH1);
+ writel(0, base + TIMER3_MATCH2);
+ clocksource_mmio_init(base + TIMER3_COUNT,
+ "fttmr010_clocksource", tick_rate,
+ 300, 32, clocksource_mmio_readl_up);
+ sched_clock_register(fttmr010_read_sched_clock, 32, tick_rate);
+
+ /*
+ * Setup clockevent timer (interrupt-driven.)
+ */
+ writel(0, base + TIMER1_COUNT);
+ writel(0, base + TIMER1_LOAD);
+ writel(0, base + TIMER1_MATCH1);
+ writel(0, base + TIMER1_MATCH2);
+ setup_irq(irq, &fttmr010_timer_irq);
+ fttmr010_clockevent.cpumask = cpumask_of(0);
+ clockevents_config_and_register(&fttmr010_clockevent, tick_rate,
+ 1, 0xffffffff);
+
+ return 0;
+}
+CLOCKSOURCE_OF_DECLARE(gemini, "cortina,gemini-timer", gemini_timer_of_init);
diff --git a/drivers/clocksource/timer-gemini.c b/drivers/clocksource/timer-gemini.c
deleted file mode 100644
index dda27b7..0000000
--- a/drivers/clocksource/timer-gemini.c
+++ /dev/null
@@ -1,277 +0,0 @@
-/*
- * Gemini timer driver
- * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org>
- *
- * Based on a rewrite of arch/arm/mach-gemini/timer.c:
- * Copyright (C) 2001-2006 Storlink, Corp.
- * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
- */
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/mfd/syscon.h>
-#include <linux/regmap.h>
-#include <linux/clockchips.h>
-#include <linux/clocksource.h>
-#include <linux/sched_clock.h>
-
-/*
- * Relevant registers in the global syscon
- */
-#define GLOBAL_STATUS 0x04
-#define CPU_AHB_RATIO_MASK (0x3 << 18)
-#define CPU_AHB_1_1 (0x0 << 18)
-#define CPU_AHB_3_2 (0x1 << 18)
-#define CPU_AHB_24_13 (0x2 << 18)
-#define CPU_AHB_2_1 (0x3 << 18)
-#define REG_TO_AHB_SPEED(reg) ((((reg) >> 15) & 0x7) * 10 + 130)
-
-/*
- * Register definitions for the timers
- */
-#define TIMER1_COUNT (0x00)
-#define TIMER1_LOAD (0x04)
-#define TIMER1_MATCH1 (0x08)
-#define TIMER1_MATCH2 (0x0c)
-#define TIMER2_COUNT (0x10)
-#define TIMER2_LOAD (0x14)
-#define TIMER2_MATCH1 (0x18)
-#define TIMER2_MATCH2 (0x1c)
-#define TIMER3_COUNT (0x20)
-#define TIMER3_LOAD (0x24)
-#define TIMER3_MATCH1 (0x28)
-#define TIMER3_MATCH2 (0x2c)
-#define TIMER_CR (0x30)
-#define TIMER_INTR_STATE (0x34)
-#define TIMER_INTR_MASK (0x38)
-
-#define TIMER_1_CR_ENABLE (1 << 0)
-#define TIMER_1_CR_CLOCK (1 << 1)
-#define TIMER_1_CR_INT (1 << 2)
-#define TIMER_2_CR_ENABLE (1 << 3)
-#define TIMER_2_CR_CLOCK (1 << 4)
-#define TIMER_2_CR_INT (1 << 5)
-#define TIMER_3_CR_ENABLE (1 << 6)
-#define TIMER_3_CR_CLOCK (1 << 7)
-#define TIMER_3_CR_INT (1 << 8)
-#define TIMER_1_CR_UPDOWN (1 << 9)
-#define TIMER_2_CR_UPDOWN (1 << 10)
-#define TIMER_3_CR_UPDOWN (1 << 11)
-#define TIMER_DEFAULT_FLAGS (TIMER_1_CR_UPDOWN | \
- TIMER_3_CR_ENABLE | \
- TIMER_3_CR_UPDOWN)
-
-#define TIMER_1_INT_MATCH1 (1 << 0)
-#define TIMER_1_INT_MATCH2 (1 << 1)
-#define TIMER_1_INT_OVERFLOW (1 << 2)
-#define TIMER_2_INT_MATCH1 (1 << 3)
-#define TIMER_2_INT_MATCH2 (1 << 4)
-#define TIMER_2_INT_OVERFLOW (1 << 5)
-#define TIMER_3_INT_MATCH1 (1 << 6)
-#define TIMER_3_INT_MATCH2 (1 << 7)
-#define TIMER_3_INT_OVERFLOW (1 << 8)
-#define TIMER_INT_ALL_MASK 0x1ff
-
-static unsigned int tick_rate;
-static void __iomem *base;
-
-static u64 notrace gemini_read_sched_clock(void)
-{
- return readl(base + TIMER3_COUNT);
-}
-
-static int gemini_timer_set_next_event(unsigned long cycles,
- struct clock_event_device *evt)
-{
- u32 cr;
-
- /* Setup the match register */
- cr = readl(base + TIMER1_COUNT);
- writel(cr + cycles, base + TIMER1_MATCH1);
- if (readl(base + TIMER1_COUNT) - cr > cycles)
- return -ETIME;
-
- return 0;
-}
-
-static int gemini_timer_shutdown(struct clock_event_device *evt)
-{
- u32 cr;
-
- /*
- * Disable also for oneshot: the set_next() call will arm the timer
- * instead.
- */
- /* Stop timer and interrupt. */
- cr = readl(base + TIMER_CR);
- cr &= ~(TIMER_1_CR_ENABLE | TIMER_1_CR_INT);
- writel(cr, base + TIMER_CR);
-
- /* Setup counter start from 0 */
- writel(0, base + TIMER1_COUNT);
- writel(0, base + TIMER1_LOAD);
-
- /* enable interrupt */
- cr = readl(base + TIMER_INTR_MASK);
- cr &= ~(TIMER_1_INT_OVERFLOW | TIMER_1_INT_MATCH2);
- cr |= TIMER_1_INT_MATCH1;
- writel(cr, base + TIMER_INTR_MASK);
-
- /* start the timer */
- cr = readl(base + TIMER_CR);
- cr |= TIMER_1_CR_ENABLE;
- writel(cr, base + TIMER_CR);
-
- return 0;
-}
-
-static int gemini_timer_set_periodic(struct clock_event_device *evt)
-{
- u32 period = DIV_ROUND_CLOSEST(tick_rate, HZ);
- u32 cr;
-
- /* Stop timer and interrupt */
- cr = readl(base + TIMER_CR);
- cr &= ~(TIMER_1_CR_ENABLE | TIMER_1_CR_INT);
- writel(cr, base + TIMER_CR);
-
- /* Setup timer to fire at 1/HT intervals. */
- cr = 0xffffffff - (period - 1);
- writel(cr, base + TIMER1_COUNT);
- writel(cr, base + TIMER1_LOAD);
-
- /* enable interrupt on overflow */
- cr = readl(base + TIMER_INTR_MASK);
- cr &= ~(TIMER_1_INT_MATCH1 | TIMER_1_INT_MATCH2);
- cr |= TIMER_1_INT_OVERFLOW;
- writel(cr, base + TIMER_INTR_MASK);
-
- /* Start the timer */
- cr = readl(base + TIMER_CR);
- cr |= TIMER_1_CR_ENABLE;
- cr |= TIMER_1_CR_INT;
- writel(cr, base + TIMER_CR);
-
- return 0;
-}
-
-/* Use TIMER1 as clock event */
-static struct clock_event_device gemini_clockevent = {
- .name = "TIMER1",
- /* Reasonably fast and accurate clock event */
- .rating = 300,
- .shift = 32,
- .features = CLOCK_EVT_FEAT_PERIODIC |
- CLOCK_EVT_FEAT_ONESHOT,
- .set_next_event = gemini_timer_set_next_event,
- .set_state_shutdown = gemini_timer_shutdown,
- .set_state_periodic = gemini_timer_set_periodic,
- .set_state_oneshot = gemini_timer_shutdown,
- .tick_resume = gemini_timer_shutdown,
-};
-
-/*
- * IRQ handler for the timer
- */
-static irqreturn_t gemini_timer_interrupt(int irq, void *dev_id)
-{
- struct clock_event_device *evt = &gemini_clockevent;
-
- evt->event_handler(evt);
- return IRQ_HANDLED;
-}
-
-static struct irqaction gemini_timer_irq = {
- .name = "Gemini Timer Tick",
- .flags = IRQF_TIMER,
- .handler = gemini_timer_interrupt,
-};
-
-static int __init gemini_timer_of_init(struct device_node *np)
-{
- static struct regmap *map;
- int irq;
- int ret;
- u32 val;
-
- map = syscon_regmap_lookup_by_phandle(np, "syscon");
- if (IS_ERR(map)) {
- pr_err("Can't get regmap for syscon handle");
- return -ENODEV;
- }
- ret = regmap_read(map, GLOBAL_STATUS, &val);
- if (ret) {
- pr_err("Can't read syscon status register");
- return -ENXIO;
- }
-
- base = of_iomap(np, 0);
- if (!base) {
- pr_err("Can't remap registers");
- return -ENXIO;
- }
- /* IRQ for timer 1 */
- irq = irq_of_parse_and_map(np, 0);
- if (irq <= 0) {
- pr_err("Can't parse IRQ");
- return -EINVAL;
- }
-
- tick_rate = REG_TO_AHB_SPEED(val) * 1000000;
- printk(KERN_INFO "Bus: %dMHz", tick_rate / 1000000);
-
- tick_rate /= 6; /* APB bus run AHB*(1/6) */
-
- switch (val & CPU_AHB_RATIO_MASK) {
- case CPU_AHB_1_1:
- printk(KERN_CONT "(1/1)\n");
- break;
- case CPU_AHB_3_2:
- printk(KERN_CONT "(3/2)\n");
- break;
- case CPU_AHB_24_13:
- printk(KERN_CONT "(24/13)\n");
- break;
- case CPU_AHB_2_1:
- printk(KERN_CONT "(2/1)\n");
- break;
- }
-
- /*
- * Reset the interrupt mask and status
- */
- writel(TIMER_INT_ALL_MASK, base + TIMER_INTR_MASK);
- writel(0, base + TIMER_INTR_STATE);
- writel(TIMER_DEFAULT_FLAGS, base + TIMER_CR);
-
- /*
- * Setup free-running clocksource timer (interrupts
- * disabled.)
- */
- writel(0, base + TIMER3_COUNT);
- writel(0, base + TIMER3_LOAD);
- writel(0, base + TIMER3_MATCH1);
- writel(0, base + TIMER3_MATCH2);
- clocksource_mmio_init(base + TIMER3_COUNT,
- "gemini_clocksource", tick_rate,
- 300, 32, clocksource_mmio_readl_up);
- sched_clock_register(gemini_read_sched_clock, 32, tick_rate);
-
- /*
- * Setup clockevent timer (interrupt-driven.)
- */
- writel(0, base + TIMER1_COUNT);
- writel(0, base + TIMER1_LOAD);
- writel(0, base + TIMER1_MATCH1);
- writel(0, base + TIMER1_MATCH2);
- setup_irq(irq, &gemini_timer_irq);
- gemini_clockevent.cpumask = cpumask_of(0);
- clockevents_config_and_register(&gemini_clockevent, tick_rate,
- 1, 0xffffffff);
-
- return 0;
-}
-CLOCKSOURCE_OF_DECLARE(nomadik_mtu, "cortina,gemini-timer",
- gemini_timer_of_init);
--
2.7.4
^ permalink raw reply related [flat|nested] 32+ messages in thread* [PATCH 29/29] clocksource/drivers/fttmr010: Refactor to handle clock
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
` (26 preceding siblings ...)
2017-04-16 20:27 ` [PATCH 28/29] clocksource/drivers/gemini: Rename Gemini timer to Faraday Daniel Lezcano
@ 2017-04-16 20:27 ` Daniel Lezcano
27 siblings, 0 replies; 32+ messages in thread
From: Daniel Lezcano @ 2017-04-16 20:27 UTC (permalink / raw)
To: tglx; +Cc: linux-kernel, Linus Walleij
From: Linus Walleij <linus.walleij@linaro.org>
The plain Faraday FTTMR010 timer needs a clock to figure out its
tick rate, and the gemini reads it directly from the system
controller set-up. Split the init function and add two paths for
the two compatible-strings. We only support clocking using PCLK
because of lack of documentation on how EXTCLK works.
The Gemini still works like before, but we can also support a
generic, clock-based version.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/clocksource/timer-fttmr010.c | 119 +++++++++++++++++++++--------------
1 file changed, 73 insertions(+), 46 deletions(-)
diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c
index e37ec3d..b4a6f1e 100644
--- a/drivers/clocksource/timer-fttmr010.c
+++ b/drivers/clocksource/timer-fttmr010.c
@@ -16,17 +16,7 @@
#include <linux/clockchips.h>
#include <linux/clocksource.h>
#include <linux/sched_clock.h>
-
-/*
- * Relevant registers in the global syscon
- */
-#define GLOBAL_STATUS 0x04
-#define CPU_AHB_RATIO_MASK (0x3 << 18)
-#define CPU_AHB_1_1 (0x0 << 18)
-#define CPU_AHB_3_2 (0x1 << 18)
-#define CPU_AHB_24_13 (0x2 << 18)
-#define CPU_AHB_2_1 (0x3 << 18)
-#define REG_TO_AHB_SPEED(reg) ((((reg) >> 15) & 0x7) * 10 + 130)
+#include <linux/clk.h>
/*
* Register definitions for the timers
@@ -189,23 +179,9 @@ static struct irqaction fttmr010_timer_irq = {
.handler = fttmr010_timer_interrupt,
};
-static int __init gemini_timer_of_init(struct device_node *np)
+static int __init fttmr010_timer_common_init(struct device_node *np)
{
- static struct regmap *map;
int irq;
- int ret;
- u32 val;
-
- map = syscon_regmap_lookup_by_phandle(np, "syscon");
- if (IS_ERR(map)) {
- pr_err("Can't get regmap for syscon handle");
- return -ENODEV;
- }
- ret = regmap_read(map, GLOBAL_STATUS, &val);
- if (ret) {
- pr_err("Can't read syscon status register");
- return -ENXIO;
- }
base = of_iomap(np, 0);
if (!base) {
@@ -219,26 +195,6 @@ static int __init gemini_timer_of_init(struct device_node *np)
return -EINVAL;
}
- tick_rate = REG_TO_AHB_SPEED(val) * 1000000;
- printk(KERN_INFO "Bus: %dMHz", tick_rate / 1000000);
-
- tick_rate /= 6; /* APB bus run AHB*(1/6) */
-
- switch (val & CPU_AHB_RATIO_MASK) {
- case CPU_AHB_1_1:
- printk(KERN_CONT "(1/1)\n");
- break;
- case CPU_AHB_3_2:
- printk(KERN_CONT "(3/2)\n");
- break;
- case CPU_AHB_24_13:
- printk(KERN_CONT "(24/13)\n");
- break;
- case CPU_AHB_2_1:
- printk(KERN_CONT "(2/1)\n");
- break;
- }
-
/*
* Reset the interrupt mask and status
*/
@@ -273,4 +229,75 @@ static int __init gemini_timer_of_init(struct device_node *np)
return 0;
}
+
+static int __init fttmr010_timer_of_init(struct device_node *np)
+{
+ /*
+ * These implementations require a clock reference.
+ * FIXME: we currently only support clocking using PCLK
+ * and using EXTCLK is not supported in the driver.
+ */
+ struct clk *clk;
+
+ clk = of_clk_get_by_name(np, "PCLK");
+ if (IS_ERR(clk)) {
+ pr_err("could not get PCLK");
+ return PTR_ERR(clk);
+ }
+ tick_rate = clk_get_rate(clk);
+
+ return fttmr010_timer_common_init(np);
+}
+CLOCKSOURCE_OF_DECLARE(fttmr010, "faraday,fttmr010", fttmr010_timer_of_init);
+
+/*
+ * Gemini-specific: relevant registers in the global syscon
+ */
+#define GLOBAL_STATUS 0x04
+#define CPU_AHB_RATIO_MASK (0x3 << 18)
+#define CPU_AHB_1_1 (0x0 << 18)
+#define CPU_AHB_3_2 (0x1 << 18)
+#define CPU_AHB_24_13 (0x2 << 18)
+#define CPU_AHB_2_1 (0x3 << 18)
+#define REG_TO_AHB_SPEED(reg) ((((reg) >> 15) & 0x7) * 10 + 130)
+
+static int __init gemini_timer_of_init(struct device_node *np)
+{
+ static struct regmap *map;
+ int ret;
+ u32 val;
+
+ map = syscon_regmap_lookup_by_phandle(np, "syscon");
+ if (IS_ERR(map)) {
+ pr_err("Can't get regmap for syscon handle\n");
+ return -ENODEV;
+ }
+ ret = regmap_read(map, GLOBAL_STATUS, &val);
+ if (ret) {
+ pr_err("Can't read syscon status register\n");
+ return -ENXIO;
+ }
+
+ tick_rate = REG_TO_AHB_SPEED(val) * 1000000;
+ pr_info("Bus: %dMHz ", tick_rate / 1000000);
+
+ tick_rate /= 6; /* APB bus run AHB*(1/6) */
+
+ switch (val & CPU_AHB_RATIO_MASK) {
+ case CPU_AHB_1_1:
+ pr_cont("(1/1)\n");
+ break;
+ case CPU_AHB_3_2:
+ pr_cont("(3/2)\n");
+ break;
+ case CPU_AHB_24_13:
+ pr_cont("(24/13)\n");
+ break;
+ case CPU_AHB_2_1:
+ pr_cont("(2/1)\n");
+ break;
+ }
+
+ return fttmr010_timer_common_init(np);
+}
CLOCKSOURCE_OF_DECLARE(gemini, "cortina,gemini-timer", gemini_timer_of_init);
--
2.7.4
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