[ANNOUNCE] 4.1.15-rt17
From: Sebastian Andrzej Siewior
Date: Tue Dec 22 2015 - 11:56:10 EST
Dear RT folks!
I'm pleased to announce the v4.1.15-rt17 patch set.
Changes since v4.1.15-rt16:
Axel Lin (1):
gpio: omap: Fix missing raw locks conversion
Grygorii Strashko (15):
gpio: omap: fix omap_gpio_free to not clean up irq configuration
gpio: omap: fix error handling in omap_gpio_irq_type
gpio: omap: rework omap_x_irq_shutdown to touch only irqs specific registers
gpio: omap: rework omap_gpio_request to touch only gpio specific registers
gpio: omap: rework omap_gpio_irq_startup to handle current pin state properly
gpio: omap: add missed spin_unlock_irqrestore in omap_gpio_irq_type
gpio: omap: prevent module from being unloaded while in use
gpio: omap: remove wrong irq_domain_remove usage in probe
gpio: omap: switch to use platform_get_irq
gpio: omap: fix omap2_set_gpio_debounce
gpio: omap: protect regs access in omap_gpio_irq_handler
gpio: omap: fix clk_prepare/unprepare usage
gpio: omap: fix static checker warning
gpio: omap: move pm runtime in irq_chip.irq_bus_lock/sync_unlock
gpio: omap: convert to use generic irq handler
Russ Dill (1):
ARM: OMAP2: Drop the concept of certain power domains not being able to lose context.
Sebastian Andrzej Siewior (4):
Revert "x86: Do not disable preemption in int3 on 32bit"
Revert "gpio: omap: use raw locks for locking"
gpio: omap: use raw locks for locking
v4.1.15-rt17
Tony Lindgren (3):
gpio: omap: Allow building as a loadable module
gpio: omap: Fix gpiochip_add() handling for deferred probe
gpio: omap: Fix GPIO numbering for deferred probe
Yang Shi (1):
x86/signal: delay calling signals on 32bit
bmouring@xxxxxx (1):
rtmutex: Use chainwalking control enum
Known issues:
- bcache stays disabled
- CPU hotplug is not better than before
- The netlink_release() OOPS, reported by Clark, is still on the
list, but unsolved due to lack of information
- Christoph Mathys reported a stall in cgroup locking code while using
Linux containers.
The delta patch against 4.1.15-rt17 is appended below and can be found here:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/incr/patch-4.1.15-rt16-rt17.patch.xz
You can get this release via the git tree at:
git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v4.1.15-rt17
The RT patch against 4.1.15 can be found here:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patch-4.1.15-rt17.patch.xz
The split quilt queue is available at:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.1/patches-4.1.15-rt17.tar.xz
Sebastian
diff --git a/arch/arm/mach-omap2/gpio.c b/arch/arm/mach-omap2/gpio.c
index 7a577145b68b..689a1af47c80 100644
--- a/arch/arm/mach-omap2/gpio.c
+++ b/arch/arm/mach-omap2/gpio.c
@@ -130,7 +130,6 @@ static int __init omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
}
pwrdm = omap_hwmod_get_pwrdm(oh);
- pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);
pdev = omap_device_build(name, id - 1, oh, pdata, sizeof(*pdata));
kfree(pdata);
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c
index 78af6d8cf2e2..ef4227ffa3b6 100644
--- a/arch/arm/mach-omap2/powerdomain.c
+++ b/arch/arm/mach-omap2/powerdomain.c
@@ -1166,43 +1166,3 @@ int pwrdm_get_context_loss_count(struct powerdomain *pwrdm)
return count;
}
-/**
- * pwrdm_can_ever_lose_context - can this powerdomain ever lose context?
- * @pwrdm: struct powerdomain *
- *
- * Given a struct powerdomain * @pwrdm, returns 1 if the powerdomain
- * can lose either memory or logic context or if @pwrdm is invalid, or
- * returns 0 otherwise. This function is not concerned with how the
- * powerdomain registers are programmed (i.e., to go off or not); it's
- * concerned with whether it's ever possible for this powerdomain to
- * go off while some other part of the chip is active. This function
- * assumes that every powerdomain can go to either ON or INACTIVE.
- */
-bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm)
-{
- int i;
-
- if (!pwrdm) {
- pr_debug("powerdomain: %s: invalid powerdomain pointer\n",
- __func__);
- return 1;
- }
-
- if (pwrdm->pwrsts & PWRSTS_OFF)
- return 1;
-
- if (pwrdm->pwrsts & PWRSTS_RET) {
- if (pwrdm->pwrsts_logic_ret & PWRSTS_OFF)
- return 1;
-
- for (i = 0; i < pwrdm->banks; i++)
- if (pwrdm->pwrsts_mem_ret[i] & PWRSTS_OFF)
- return 1;
- }
-
- for (i = 0; i < pwrdm->banks; i++)
- if (pwrdm->pwrsts_mem_on[i] & PWRSTS_OFF)
- return 1;
-
- return 0;
-}
diff --git a/arch/arm/mach-omap2/powerdomain.h b/arch/arm/mach-omap2/powerdomain.h
index 28a796ce07d7..5e0c033a21db 100644
--- a/arch/arm/mach-omap2/powerdomain.h
+++ b/arch/arm/mach-omap2/powerdomain.h
@@ -244,7 +244,6 @@ int pwrdm_state_switch(struct powerdomain *pwrdm);
int pwrdm_pre_transition(struct powerdomain *pwrdm);
int pwrdm_post_transition(struct powerdomain *pwrdm);
int pwrdm_get_context_loss_count(struct powerdomain *pwrdm);
-bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm);
extern int omap_set_pwrdm_state(struct powerdomain *pwrdm, u8 state);
diff --git a/arch/x86/include/asm/signal.h b/arch/x86/include/asm/signal.h
index b1b08a28c72a..0e7bfe98e1d1 100644
--- a/arch/x86/include/asm/signal.h
+++ b/arch/x86/include/asm/signal.h
@@ -32,7 +32,7 @@ typedef struct {
* TIF_NOTIFY_RESUME and set up the signal to be sent on exit of the
* trap.
*/
-#if defined(CONFIG_PREEMPT_RT_FULL) && defined(CONFIG_X86_64)
+#if defined(CONFIG_PREEMPT_RT_FULL)
#define ARCH_RT_DELAYS_SIGNAL_SEND
#endif
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index ebae118938ef..324ab5247687 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -88,21 +88,9 @@ static inline void conditional_sti(struct pt_regs *regs)
local_irq_enable();
}
-static inline void conditional_sti_ist(struct pt_regs *regs)
+static inline void preempt_conditional_sti(struct pt_regs *regs)
{
-#ifdef CONFIG_X86_64
- /*
- * X86_64 uses a per CPU stack on the IST for certain traps
- * like int3. The task can not be preempted when using one
- * of these stacks, thus preemption must be disabled, otherwise
- * the stack can be corrupted if the task is scheduled out,
- * and another task comes in and uses this stack.
- *
- * On x86_32 the task keeps its own stack and it is OK if the
- * task schedules out.
- */
preempt_count_inc();
-#endif
if (regs->flags & X86_EFLAGS_IF)
local_irq_enable();
}
@@ -113,13 +101,11 @@ static inline void conditional_cli(struct pt_regs *regs)
local_irq_disable();
}
-static inline void conditional_cli_ist(struct pt_regs *regs)
+static inline void preempt_conditional_cli(struct pt_regs *regs)
{
if (regs->flags & X86_EFLAGS_IF)
local_irq_disable();
-#ifdef CONFIG_X86_64
preempt_count_dec();
-#endif
}
enum ctx_state ist_enter(struct pt_regs *regs)
@@ -550,9 +536,9 @@ dotraplinkage void notrace do_int3(struct pt_regs *regs, long error_code)
* as we may switch to the interrupt stack.
*/
debug_stack_usage_inc();
- conditional_sti_ist(regs);
+ preempt_conditional_sti(regs);
do_trap(X86_TRAP_BP, SIGTRAP, "int3", regs, error_code, NULL);
- conditional_cli_ist(regs);
+ preempt_conditional_cli(regs);
debug_stack_usage_dec();
exit:
ist_exit(regs, prev_state);
@@ -682,12 +668,12 @@ dotraplinkage void do_debug(struct pt_regs *regs, long error_code)
debug_stack_usage_inc();
/* It's safe to allow irq's after DR6 has been saved */
- conditional_sti_ist(regs);
+ preempt_conditional_sti(regs);
if (v8086_mode(regs)) {
handle_vm86_trap((struct kernel_vm86_regs *) regs, error_code,
X86_TRAP_DB);
- conditional_cli_ist(regs);
+ preempt_conditional_cli(regs);
debug_stack_usage_dec();
goto exit;
}
@@ -707,7 +693,7 @@ dotraplinkage void do_debug(struct pt_regs *regs, long error_code)
si_code = get_si_code(tsk->thread.debugreg6);
if (tsk->thread.debugreg6 & (DR_STEP | DR_TRAP_BITS) || user_icebp)
send_sigtrap(tsk, regs, error_code, si_code);
- conditional_cli_ist(regs);
+ preempt_conditional_cli(regs);
debug_stack_usage_dec();
exit:
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index caefe806db5e..ff7df95de3bf 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -308,7 +308,7 @@ config GPIO_OCTEON
family of SOCs.
config GPIO_OMAP
- bool "TI OMAP GPIO support" if COMPILE_TEST && !ARCH_OMAP2PLUS
+ tristate "TI OMAP GPIO support" if ARCH_OMAP2PLUS || COMPILE_TEST
default y if ARCH_OMAP
depends on ARM
select GENERIC_IRQ_CHIP
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index a0ace2758e2e..4916fd726dce 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -29,6 +29,7 @@
#include <linux/platform_data/gpio-omap.h>
#define OFF_MODE 1
+#define OMAP4_GPIO_DEBOUNCINGTIME_MASK 0xFF
static LIST_HEAD(omap_gpio_list);
@@ -50,7 +51,7 @@ struct gpio_regs {
struct gpio_bank {
struct list_head node;
void __iomem *base;
- u16 irq;
+ int irq;
u32 non_wakeup_gpios;
u32 enabled_non_wakeup_gpios;
struct gpio_regs context;
@@ -58,6 +59,7 @@ struct gpio_bank {
u32 level_mask;
u32 toggle_mask;
raw_spinlock_t lock;
+ raw_spinlock_t wa_lock;
struct gpio_chip chip;
struct clk *dbck;
u32 mod_usage;
@@ -67,7 +69,7 @@ struct gpio_bank {
struct device *dev;
bool is_mpuio;
bool dbck_flag;
- bool loses_context;
+
bool context_valid;
int stride;
u32 width;
@@ -175,7 +177,7 @@ static inline void omap_gpio_rmw(void __iomem *base, u32 reg, u32 mask, bool set
static inline void omap_gpio_dbck_enable(struct gpio_bank *bank)
{
if (bank->dbck_enable_mask && !bank->dbck_enabled) {
- clk_prepare_enable(bank->dbck);
+ clk_enable(bank->dbck);
bank->dbck_enabled = true;
writel_relaxed(bank->dbck_enable_mask,
@@ -193,7 +195,7 @@ static inline void omap_gpio_dbck_disable(struct gpio_bank *bank)
*/
writel_relaxed(0, bank->base + bank->regs->debounce_en);
- clk_disable_unprepare(bank->dbck);
+ clk_disable(bank->dbck);
bank->dbck_enabled = false;
}
}
@@ -204,8 +206,9 @@ static inline void omap_gpio_dbck_disable(struct gpio_bank *bank)
* @offset: the gpio number on this @bank
* @debounce: debounce time to use
*
- * OMAP's debounce time is in 31us steps so we need
- * to convert and round up to the closest unit.
+ * OMAP's debounce time is in 31us steps
+ * <debounce time> = (GPIO_DEBOUNCINGTIME[7:0].DEBOUNCETIME + 1) x 31
+ * so we need to convert and round up to the closest unit.
*/
static void omap2_set_gpio_debounce(struct gpio_bank *bank, unsigned offset,
unsigned debounce)
@@ -213,34 +216,33 @@ static void omap2_set_gpio_debounce(struct gpio_bank *bank, unsigned offset,
void __iomem *reg;
u32 val;
u32 l;
+ bool enable = !!debounce;
if (!bank->dbck_flag)
return;
- if (debounce < 32)
- debounce = 0x01;
- else if (debounce > 7936)
- debounce = 0xff;
- else
- debounce = (debounce / 0x1f) - 1;
+ if (enable) {
+ debounce = DIV_ROUND_UP(debounce, 31) - 1;
+ debounce &= OMAP4_GPIO_DEBOUNCINGTIME_MASK;
+ }
l = BIT(offset);
- clk_prepare_enable(bank->dbck);
+ clk_enable(bank->dbck);
reg = bank->base + bank->regs->debounce;
writel_relaxed(debounce, reg);
reg = bank->base + bank->regs->debounce_en;
val = readl_relaxed(reg);
- if (debounce)
+ if (enable)
val |= l;
else
val &= ~l;
bank->dbck_enable_mask = val;
writel_relaxed(val, reg);
- clk_disable_unprepare(bank->dbck);
+ clk_disable(bank->dbck);
/*
* Enable debounce clock per module.
* This call is mandatory because in omap_gpio_request() when
@@ -285,7 +287,7 @@ static void omap_clear_gpio_debounce(struct gpio_bank *bank, unsigned offset)
bank->context.debounce = 0;
writel_relaxed(bank->context.debounce, bank->base +
bank->regs->debounce);
- clk_disable_unprepare(bank->dbck);
+ clk_disable(bank->dbck);
bank->dbck_enabled = false;
}
}
@@ -488,9 +490,6 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type)
unsigned long flags;
unsigned offset = d->hwirq;
- if (!BANK_USED(bank))
- pm_runtime_get_sync(bank->dev);
-
if (type & ~IRQ_TYPE_SENSE_MASK)
return -EINVAL;
@@ -500,10 +499,15 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type)
raw_spin_lock_irqsave(&bank->lock, flags);
retval = omap_set_gpio_triggering(bank, offset, type);
+ if (retval) {
+ raw_spin_unlock_irqrestore(&bank->lock, flags);
+ goto error;
+ }
omap_gpio_init_irq(bank, offset);
if (!omap_gpio_is_input(bank, offset)) {
raw_spin_unlock_irqrestore(&bank->lock, flags);
- return -EINVAL;
+ retval = -EINVAL;
+ goto error;
}
raw_spin_unlock_irqrestore(&bank->lock, flags);
@@ -512,6 +516,9 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type)
else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
__irq_set_handler_locked(d->irq, handle_edge_irq);
+ return 0;
+
+error:
return retval;
}
@@ -638,22 +645,18 @@ static int omap_set_gpio_wakeup(struct gpio_bank *bank, unsigned offset,
return 0;
}
-static void omap_reset_gpio(struct gpio_bank *bank, unsigned offset)
-{
- omap_set_gpio_direction(bank, offset, 1);
- omap_set_gpio_irqenable(bank, offset, 0);
- omap_clear_gpio_irqstatus(bank, offset);
- omap_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
- omap_clear_gpio_debounce(bank, offset);
-}
-
/* Use disable_irq_wake() and enable_irq_wake() functions from drivers */
static int omap_gpio_wake_enable(struct irq_data *d, unsigned int enable)
{
struct gpio_bank *bank = omap_irq_data_get_bank(d);
unsigned offset = d->hwirq;
+ int ret;
- return omap_set_gpio_wakeup(bank, offset, enable);
+ ret = omap_set_gpio_wakeup(bank, offset, enable);
+ if (!ret)
+ ret = irq_set_irq_wake(bank->irq, enable);
+
+ return ret;
}
static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
@@ -669,14 +672,7 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
pm_runtime_get_sync(bank->dev);
raw_spin_lock_irqsave(&bank->lock, flags);
- /* Set trigger to none. You need to enable the desired trigger with
- * request_irq() or set_irq_type(). Only do this if the IRQ line has
- * not already been requested.
- */
- if (!LINE_USED(bank->irq_usage, offset)) {
- omap_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
- omap_enable_gpio_module(bank, offset);
- }
+ omap_enable_gpio_module(bank, offset);
bank->mod_usage |= BIT(offset);
raw_spin_unlock_irqrestore(&bank->lock, flags);
@@ -690,8 +686,11 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
raw_spin_lock_irqsave(&bank->lock, flags);
bank->mod_usage &= ~(BIT(offset));
+ if (!LINE_USED(bank->irq_usage, offset)) {
+ omap_set_gpio_direction(bank, offset, 1);
+ omap_clear_gpio_debounce(bank, offset);
+ }
omap_disable_gpio_module(bank, offset);
- omap_reset_gpio(bank, offset);
raw_spin_unlock_irqrestore(&bank->lock, flags);
/*
@@ -711,29 +710,27 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
* line's interrupt handler has been run, we may miss some nested
* interrupts.
*/
-static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+static irqreturn_t omap_gpio_irq_handler(int irq, void *gpiobank)
{
void __iomem *isr_reg = NULL;
u32 isr;
unsigned int bit;
- struct gpio_bank *bank;
- int unmasked = 0;
- struct irq_chip *irqchip = irq_desc_get_chip(desc);
- struct gpio_chip *chip = irq_get_handler_data(irq);
+ struct gpio_bank *bank = gpiobank;
+ unsigned long wa_lock_flags;
+ unsigned long lock_flags;
- chained_irq_enter(irqchip, desc);
-
- bank = container_of(chip, struct gpio_bank, chip);
isr_reg = bank->base + bank->regs->irqstatus;
- pm_runtime_get_sync(bank->dev);
-
if (WARN_ON(!isr_reg))
goto exit;
+ pm_runtime_get_sync(bank->dev);
+
while (1) {
u32 isr_saved, level_mask = 0;
u32 enabled;
+ raw_spin_lock_irqsave(&bank->lock, lock_flags);
+
enabled = omap_get_gpio_irqbank_mask(bank);
isr_saved = isr = readl_relaxed(isr_reg) & enabled;
@@ -747,12 +744,7 @@ static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
omap_clear_gpio_irqbank(bank, isr_saved & ~level_mask);
omap_enable_gpio_irqbank(bank, isr_saved & ~level_mask);
- /* if there is only edge sensitive GPIO pin interrupts
- configured, we could unmask GPIO bank interrupt immediately */
- if (!level_mask && !unmasked) {
- unmasked = 1;
- chained_irq_exit(irqchip, desc);
- }
+ raw_spin_unlock_irqrestore(&bank->lock, lock_flags);
if (!isr)
break;
@@ -761,6 +753,7 @@ static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
bit = __ffs(isr);
isr &= ~(BIT(bit));
+ raw_spin_lock_irqsave(&bank->lock, lock_flags);
/*
* Some chips can't respond to both rising and falling
* at the same time. If this irq was requested with
@@ -771,18 +764,20 @@ static void omap_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
if (bank->toggle_mask & (BIT(bit)))
omap_toggle_gpio_edge_triggering(bank, bit);
+ raw_spin_unlock_irqrestore(&bank->lock, lock_flags);
+
+ raw_spin_lock_irqsave(&bank->wa_lock, wa_lock_flags);
+
generic_handle_irq(irq_find_mapping(bank->chip.irqdomain,
bit));
+
+ raw_spin_unlock_irqrestore(&bank->wa_lock,
+ wa_lock_flags);
}
}
- /* if bank has any level sensitive GPIO pin interrupt
- configured, we must unmask the bank interrupt only after
- handler(s) are executed in order to avoid spurious bank
- interrupt */
exit:
- if (!unmasked)
- chained_irq_exit(irqchip, desc);
pm_runtime_put(bank->dev);
+ return IRQ_HANDLED;
}
static unsigned int omap_gpio_irq_startup(struct irq_data *d)
@@ -791,15 +786,22 @@ static unsigned int omap_gpio_irq_startup(struct irq_data *d)
unsigned long flags;
unsigned offset = d->hwirq;
- if (!BANK_USED(bank))
- pm_runtime_get_sync(bank->dev);
-
raw_spin_lock_irqsave(&bank->lock, flags);
- omap_gpio_init_irq(bank, offset);
+
+ if (!LINE_USED(bank->mod_usage, offset))
+ omap_set_gpio_direction(bank, offset, 1);
+ else if (!omap_gpio_is_input(bank, offset))
+ goto err;
+ omap_enable_gpio_module(bank, offset);
+ bank->irq_usage |= BIT(offset);
+
raw_spin_unlock_irqrestore(&bank->lock, flags);
omap_gpio_unmask_irq(d);
return 0;
+err:
+ raw_spin_unlock_irqrestore(&bank->lock, flags);
+ return -EINVAL;
}
static void omap_gpio_irq_shutdown(struct irq_data *d)
@@ -810,9 +812,26 @@ static void omap_gpio_irq_shutdown(struct irq_data *d)
raw_spin_lock_irqsave(&bank->lock, flags);
bank->irq_usage &= ~(BIT(offset));
+ omap_set_gpio_irqenable(bank, offset, 0);
+ omap_clear_gpio_irqstatus(bank, offset);
+ omap_set_gpio_triggering(bank, offset, IRQ_TYPE_NONE);
+ if (!LINE_USED(bank->mod_usage, offset))
+ omap_clear_gpio_debounce(bank, offset);
omap_disable_gpio_module(bank, offset);
- omap_reset_gpio(bank, offset);
raw_spin_unlock_irqrestore(&bank->lock, flags);
+}
+
+static void omap_gpio_irq_bus_lock(struct irq_data *data)
+{
+ struct gpio_bank *bank = omap_irq_data_get_bank(data);
+
+ if (!BANK_USED(bank))
+ pm_runtime_get_sync(bank->dev);
+}
+
+static void gpio_irq_bus_sync_unlock(struct irq_data *data)
+{
+ struct gpio_bank *bank = omap_irq_data_get_bank(data);
/*
* If this is the last IRQ to be freed in the bank,
@@ -1048,10 +1067,6 @@ static void omap_gpio_mod_init(struct gpio_bank *bank)
/* Initialize interface clk ungated, module enabled */
if (bank->regs->ctrl)
writel_relaxed(0, base + bank->regs->ctrl);
-
- bank->dbck = clk_get(bank->dev, "dbclk");
- if (IS_ERR(bank->dbck))
- dev_err(bank->dev, "Could not get gpio dbck\n");
}
static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
@@ -1080,7 +1095,6 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
} else {
bank->chip.label = "gpio";
bank->chip.base = gpio;
- gpio += bank->width;
}
bank->chip.ngpio = bank->width;
@@ -1090,6 +1104,9 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
return ret;
}
+ if (!bank->is_mpuio)
+ gpio += bank->width;
+
#ifdef CONFIG_ARCH_OMAP1
/*
* REVISIT: Once we have OMAP1 supporting SPARSE_IRQ, we can drop
@@ -1112,7 +1129,7 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
}
ret = gpiochip_irqchip_add(&bank->chip, irqc,
- irq_base, omap_gpio_irq_handler,
+ irq_base, handle_bad_irq,
IRQ_TYPE_NONE);
if (ret) {
@@ -1121,10 +1138,14 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
return -ENODEV;
}
- gpiochip_set_chained_irqchip(&bank->chip, irqc,
- bank->irq, omap_gpio_irq_handler);
+ gpiochip_set_chained_irqchip(&bank->chip, irqc, bank->irq, NULL);
- return 0;
+ ret = devm_request_irq(bank->dev, bank->irq, omap_gpio_irq_handler,
+ 0, dev_name(bank->dev), bank);
+ if (ret)
+ gpiochip_remove(&bank->chip);
+
+ return ret;
}
static const struct of_device_id omap_gpio_match[];
@@ -1163,17 +1184,23 @@ static int omap_gpio_probe(struct platform_device *pdev)
irqc->irq_unmask = omap_gpio_unmask_irq,
irqc->irq_set_type = omap_gpio_irq_type,
irqc->irq_set_wake = omap_gpio_wake_enable,
+ irqc->irq_bus_lock = omap_gpio_irq_bus_lock,
+ irqc->irq_bus_sync_unlock = gpio_irq_bus_sync_unlock,
irqc->name = dev_name(&pdev->dev);
- res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (unlikely(!res)) {
- dev_err(dev, "Invalid IRQ resource\n");
- return -ENODEV;
+ bank->irq = platform_get_irq(pdev, 0);
+ if (bank->irq <= 0) {
+ if (!bank->irq)
+ bank->irq = -ENXIO;
+ if (bank->irq != -EPROBE_DEFER)
+ dev_err(dev,
+ "can't get irq resource ret=%d\n", bank->irq);
+ return bank->irq;
}
- bank->irq = res->start;
bank->dev = dev;
bank->chip.dev = dev;
+ bank->chip.owner = THIS_MODULE;
bank->dbck_flag = pdata->dbck_flag;
bank->stride = pdata->bank_stride;
bank->width = pdata->bank_width;
@@ -1183,15 +1210,9 @@ static int omap_gpio_probe(struct platform_device *pdev)
#ifdef CONFIG_OF_GPIO
bank->chip.of_node = of_node_get(node);
#endif
- if (node) {
- if (!of_property_read_bool(node, "ti,gpio-always-on"))
- bank->loses_context = true;
- } else {
- bank->loses_context = pdata->loses_context;
-
- if (bank->loses_context)
- bank->get_context_loss_count =
- pdata->get_context_loss_count;
+ if (!node) {
+ bank->get_context_loss_count =
+ pdata->get_context_loss_count;
}
if (bank->regs->set_dataout && bank->regs->clr_dataout)
@@ -1200,15 +1221,26 @@ static int omap_gpio_probe(struct platform_device *pdev)
bank->set_dataout = omap_set_gpio_dataout_mask;
raw_spin_lock_init(&bank->lock);
+ raw_spin_lock_init(&bank->wa_lock);
/* Static mapping, never released */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
bank->base = devm_ioremap_resource(dev, res);
if (IS_ERR(bank->base)) {
- irq_domain_remove(bank->chip.irqdomain);
return PTR_ERR(bank->base);
}
+ if (bank->dbck_flag) {
+ bank->dbck = devm_clk_get(bank->dev, "dbclk");
+ if (IS_ERR(bank->dbck)) {
+ dev_err(bank->dev,
+ "Could not get gpio dbck. Disable debounce\n");
+ bank->dbck_flag = false;
+ } else {
+ clk_prepare(bank->dbck);
+ }
+ }
+
platform_set_drvdata(pdev, bank);
pm_runtime_enable(bank->dev);
@@ -1221,8 +1253,11 @@ static int omap_gpio_probe(struct platform_device *pdev)
omap_gpio_mod_init(bank);
ret = omap_gpio_chip_init(bank, irqc);
- if (ret)
+ if (ret) {
+ pm_runtime_put_sync(bank->dev);
+ pm_runtime_disable(bank->dev);
return ret;
+ }
omap_gpio_show_rev(bank);
@@ -1233,6 +1268,19 @@ static int omap_gpio_probe(struct platform_device *pdev)
return 0;
}
+static int omap_gpio_remove(struct platform_device *pdev)
+{
+ struct gpio_bank *bank = platform_get_drvdata(pdev);
+
+ list_del(&bank->node);
+ gpiochip_remove(&bank->chip);
+ pm_runtime_disable(bank->dev);
+ if (bank->dbck_flag)
+ clk_unprepare(bank->dbck);
+
+ return 0;
+}
+
#ifdef CONFIG_ARCH_OMAP2PLUS
#if defined(CONFIG_PM)
@@ -1321,7 +1369,7 @@ static int omap_gpio_runtime_resume(struct device *dev)
* been initialised and so initialise it now. Also initialise
* the context loss count.
*/
- if (bank->loses_context && !bank->context_valid) {
+ if (!bank->context_valid) {
omap_gpio_init_context(bank);
if (bank->get_context_loss_count)
@@ -1342,17 +1390,15 @@ static int omap_gpio_runtime_resume(struct device *dev)
writel_relaxed(bank->context.risingdetect,
bank->base + bank->regs->risingdetect);
- if (bank->loses_context) {
- if (!bank->get_context_loss_count) {
+ if (!bank->get_context_loss_count) {
+ omap_gpio_restore_context(bank);
+ } else {
+ c = bank->get_context_loss_count(bank->dev);
+ if (c != bank->context_loss_count) {
omap_gpio_restore_context(bank);
} else {
- c = bank->get_context_loss_count(bank->dev);
- if (c != bank->context_loss_count) {
- omap_gpio_restore_context(bank);
- } else {
- raw_spin_unlock_irqrestore(&bank->lock, flags);
- return 0;
- }
+ raw_spin_unlock_irqrestore(&bank->lock, flags);
+ return 0;
}
}
@@ -1418,12 +1464,13 @@ static int omap_gpio_runtime_resume(struct device *dev)
}
#endif /* CONFIG_PM */
+#if IS_BUILTIN(CONFIG_GPIO_OMAP)
void omap2_gpio_prepare_for_idle(int pwr_mode)
{
struct gpio_bank *bank;
list_for_each_entry(bank, &omap_gpio_list, node) {
- if (!BANK_USED(bank) || !bank->loses_context)
+ if (!BANK_USED(bank))
continue;
bank->power_mode = pwr_mode;
@@ -1437,12 +1484,13 @@ void omap2_gpio_resume_after_idle(void)
struct gpio_bank *bank;
list_for_each_entry(bank, &omap_gpio_list, node) {
- if (!BANK_USED(bank) || !bank->loses_context)
+ if (!BANK_USED(bank))
continue;
pm_runtime_get_sync(bank->dev);
}
}
+#endif
#if defined(CONFIG_PM)
static void omap_gpio_init_context(struct gpio_bank *p)
@@ -1598,6 +1646,7 @@ MODULE_DEVICE_TABLE(of, omap_gpio_match);
static struct platform_driver omap_gpio_driver = {
.probe = omap_gpio_probe,
+ .remove = omap_gpio_remove,
.driver = {
.name = "omap_gpio",
.pm = &gpio_pm_ops,
@@ -1615,3 +1664,13 @@ static int __init omap_gpio_drv_reg(void)
return platform_driver_register(&omap_gpio_driver);
}
postcore_initcall(omap_gpio_drv_reg);
+
+static void __exit omap_gpio_exit(void)
+{
+ platform_driver_unregister(&omap_gpio_driver);
+}
+module_exit(omap_gpio_exit);
+
+MODULE_DESCRIPTION("omap gpio driver");
+MODULE_ALIAS("platform:gpio-omap");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/platform_data/gpio-omap.h b/include/linux/platform_data/gpio-omap.h
index 5d50b25a73d7..ff43e01b8ca9 100644
--- a/include/linux/platform_data/gpio-omap.h
+++ b/include/linux/platform_data/gpio-omap.h
@@ -198,7 +198,6 @@ struct omap_gpio_platform_data {
int bank_width; /* GPIO bank width */
int bank_stride; /* Only needed for omap1 MPUIO */
bool dbck_flag; /* dbck required or not - True for OMAP3&4 */
- bool loses_context; /* whether the bank would ever lose context */
bool is_mpuio; /* whether the bank is of type MPUIO */
u32 non_wakeup_gpios;
@@ -208,9 +207,17 @@ struct omap_gpio_platform_data {
int (*get_context_loss_count)(struct device *dev);
};
+#if IS_BUILTIN(CONFIG_GPIO_OMAP)
extern void omap2_gpio_prepare_for_idle(int off_mode);
extern void omap2_gpio_resume_after_idle(void);
-extern void omap_set_gpio_debounce(int gpio, int enable);
-extern void omap_set_gpio_debounce_time(int gpio, int enable);
+#else
+static inline void omap2_gpio_prepare_for_idle(int off_mode)
+{
+}
+
+static inline void omap2_gpio_resume_after_idle(void)
+{
+}
+#endif
#endif
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index 20267595df07..e0b0d9b419b5 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -1008,7 +1008,7 @@ static void noinline __sched rt_spin_lock_slowlock(struct rt_mutex *lock)
__set_current_state_no_track(TASK_UNINTERRUPTIBLE);
pi_unlock(&self->pi_lock);
- ret = task_blocks_on_rt_mutex(lock, &waiter, self, 0);
+ ret = task_blocks_on_rt_mutex(lock, &waiter, self, RT_MUTEX_MIN_CHAINWALK);
BUG_ON(ret);
for (;;) {
diff --git a/localversion-rt b/localversion-rt
index 1199ebade17b..1e584b47c987 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
--rt16
+-rt17
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/