From d99f88761ba0d135677afe546ffdd26c58e5644d Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Mon, 3 Feb 2020 14:03:37 +0100 Subject: Revert "gpiolib: Remove duplicated function gpio_do_set_config()" This reverts commit d18fddff061d2796525e6d4a958cb3d30aed8efd. This patch came on top of another patch that introduced a regression. Revert it before addressing the culprit. Signed-off-by: Bartosz Golaszewski Tested-by: Guenter Roeck --- drivers/gpio/gpiolib.c | 27 +++++++++++++++++++++++---- 1 file changed, 23 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 753283486037..a3e4f5f5871f 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -3035,8 +3035,8 @@ EXPORT_SYMBOL_GPL(gpiochip_free_own_desc); * rely on gpio_request() having been called beforehand. */ -static int gpio_set_config(struct gpio_chip *gc, unsigned int offset, - enum pin_config_param mode) +static int gpio_do_set_config(struct gpio_chip *gc, unsigned int offset, + enum pin_config_param mode) { if (!gc->set_config) return -ENOTSUPP; @@ -3044,6 +3044,25 @@ static int gpio_set_config(struct gpio_chip *gc, unsigned int offset, return gc->set_config(gc, offset, mode); } +static int gpio_set_config(struct gpio_chip *gc, unsigned int offset, + enum pin_config_param mode) +{ + unsigned arg; + + switch (mode) { + case PIN_CONFIG_BIAS_DISABLE: + case PIN_CONFIG_BIAS_PULL_DOWN: + case PIN_CONFIG_BIAS_PULL_UP: + arg = 1; + break; + + default: + arg = 0; + } + + return gpio_do_set_config(gc, offset, mode); +} + static int gpio_set_bias(struct gpio_chip *chip, struct gpio_desc *desc) { int bias = 0; @@ -3277,7 +3296,7 @@ int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce) chip = desc->gdev->chip; config = pinconf_to_config_packed(PIN_CONFIG_INPUT_DEBOUNCE, debounce); - return gpio_set_config(chip, gpio_chip_hwgpio(desc), config); + return gpio_do_set_config(chip, gpio_chip_hwgpio(desc), config); } EXPORT_SYMBOL_GPL(gpiod_set_debounce); @@ -3311,7 +3330,7 @@ int gpiod_set_transitory(struct gpio_desc *desc, bool transitory) packed = pinconf_to_config_packed(PIN_CONFIG_PERSIST_STATE, !transitory); gpio = gpio_chip_hwgpio(desc); - rc = gpio_set_config(chip, gpio, packed); + rc = gpio_do_set_config(chip, gpio, packed); if (rc == -ENOTSUPP) { dev_dbg(&desc->gdev->dev, "Persistence not supported for GPIO %d\n", gpio); -- cgit v1.2.3 From 91b4ea5fc57c6a0a1beea7056dc2f83e2ec6968c Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Mon, 3 Feb 2020 14:03:47 +0100 Subject: Revert "gpiolib: remove set but not used variable 'config'" This reverts commit e5e42ad224a040f93bf112e96f82b3a0ed97ffab. This patch came on top of another patch that introduced a regression. Revert it before addressing the culprit. Signed-off-by: Bartosz Golaszewski Tested-by: Guenter Roeck --- drivers/gpio/gpiolib.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers') diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index a3e4f5f5871f..c317567eeaa0 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -3047,6 +3047,7 @@ static int gpio_do_set_config(struct gpio_chip *gc, unsigned int offset, static int gpio_set_config(struct gpio_chip *gc, unsigned int offset, enum pin_config_param mode) { + unsigned long config; unsigned arg; switch (mode) { @@ -3060,6 +3061,7 @@ static int gpio_set_config(struct gpio_chip *gc, unsigned int offset, arg = 0; } + config = PIN_CONF_PACKED(mode, arg); return gpio_do_set_config(gc, offset, mode); } -- cgit v1.2.3 From 62adc6f33d6f3c0f4831389dec0f82ea6e9a489f Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Mon, 3 Feb 2020 14:16:16 +0100 Subject: gpiolib: fix gpio_do_set_config() Commit d90f36851d65 ("gpiolib: have a single place of calling set_config()") introduced a regression where we don't pass the right variable as argument to the set_config() callback of gpio driver from gpio_set_config(). After reverting two additional patches that came on top of it - this addresses the issue by changing the type of the last argument of gpio_do_set_config() to unsigned long and making sure the packed config variable is actually used in gpio_set_config(). Fixes: d90f36851d65 ("gpiolib: have a single place of calling set_config()") Signed-off-by: Bartosz Golaszewski Tested-by: Guenter Roeck --- drivers/gpio/gpiolib.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index c317567eeaa0..2b3e665a36e0 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -3036,12 +3036,12 @@ EXPORT_SYMBOL_GPL(gpiochip_free_own_desc); */ static int gpio_do_set_config(struct gpio_chip *gc, unsigned int offset, - enum pin_config_param mode) + unsigned long config) { if (!gc->set_config) return -ENOTSUPP; - return gc->set_config(gc, offset, mode); + return gc->set_config(gc, offset, config); } static int gpio_set_config(struct gpio_chip *gc, unsigned int offset, @@ -3062,7 +3062,7 @@ static int gpio_set_config(struct gpio_chip *gc, unsigned int offset, } config = PIN_CONF_PACKED(mode, arg); - return gpio_do_set_config(gc, offset, mode); + return gpio_do_set_config(gc, offset, config); } static int gpio_set_bias(struct gpio_chip *chip, struct gpio_desc *desc) -- cgit v1.2.3 From 4d0cabbb8b6a6cb010c19e8a3da2da5e0aaf5ef0 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Wed, 29 Jan 2020 20:30:21 +0800 Subject: gpio: bd71828: Remove unneeded defines for GPIO_LINE_DIRECTION_IN/OUT They are defined in gpio/driver.h now. Signed-off-by: Axel Lin Signed-off-by: Bartosz Golaszewski --- drivers/gpio/gpio-bd71828.c | 10 ---------- 1 file changed, 10 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-bd71828.c b/drivers/gpio/gpio-bd71828.c index 04aade9e0a4d..3dbbc638e9a9 100644 --- a/drivers/gpio/gpio-bd71828.c +++ b/drivers/gpio/gpio-bd71828.c @@ -10,16 +10,6 @@ #define GPIO_OUT_REG(off) (BD71828_REG_GPIO_CTRL1 + (off)) #define HALL_GPIO_OFFSET 3 -/* - * These defines can be removed when - * "gpio: Add definition for GPIO direction" - * (9208b1e77d6e8e9776f34f46ef4079ecac9c3c25 in GPIO tree) gets merged, - */ -#ifndef GPIO_LINE_DIRECTION_IN - #define GPIO_LINE_DIRECTION_IN 1 - #define GPIO_LINE_DIRECTION_OUT 0 -#endif - struct bd71828_gpio { struct rohm_regmap_dev chip; struct gpio_chip gpio; -- cgit v1.2.3 From 8131b73b22c25e57e926874bb284f61cc3f8ac5e Mon Sep 17 00:00:00 2001 From: Kent Gibson Date: Mon, 20 Jan 2020 18:46:26 +0800 Subject: gpiolib: remove unnecessary argument from set_config call Remove unnecessary argument when setting PIN_CONFIG_BIAS_DISABLE. No argument is expected by pinctrl, so removing it should be harmless. Fixes: 2148ad7790ea ("gpiolib: add support for disabling line bias") Signed-off-by: Kent Gibson Signed-off-by: Bartosz Golaszewski --- drivers/gpio/gpiolib.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers') diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 2b3e665a36e0..4d0106ceeba7 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -3051,7 +3051,6 @@ static int gpio_set_config(struct gpio_chip *gc, unsigned int offset, unsigned arg; switch (mode) { - case PIN_CONFIG_BIAS_DISABLE: case PIN_CONFIG_BIAS_PULL_DOWN: case PIN_CONFIG_BIAS_PULL_UP: arg = 1; -- cgit v1.2.3 From c3afa804c58e5c30ac63858b527fffadc88bce82 Mon Sep 17 00:00:00 2001 From: Paul Thomas Date: Sat, 25 Jan 2020 17:14:10 -0500 Subject: gpio: xilinx: Fix bug where the wrong GPIO register is written to Care is taken with "index", however with the current version the actual xgpio_writereg is using index for data but xgpio_regoffset(chip, i) for the offset. And since i is already incremented it is incorrect. This patch fixes it so that index is used for the offset too. Cc: stable@vger.kernel.org Signed-off-by: Paul Thomas Link: https://lore.kernel.org/r/20200125221410.8022-1-pthomas8589@gmail.com Signed-off-by: Linus Walleij --- drivers/gpio/gpio-xilinx.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c index a9748b5198e6..67f9f82e0db0 100644 --- a/drivers/gpio/gpio-xilinx.c +++ b/drivers/gpio/gpio-xilinx.c @@ -147,9 +147,10 @@ static void xgpio_set_multiple(struct gpio_chip *gc, unsigned long *mask, for (i = 0; i < gc->ngpio; i++) { if (*mask == 0) break; + /* Once finished with an index write it out to the register */ if (index != xgpio_index(chip, i)) { xgpio_writereg(chip->regs + XGPIO_DATA_OFFSET + - xgpio_regoffset(chip, i), + index * XGPIO_CHANNEL_OFFSET, chip->gpio_state[index]); spin_unlock_irqrestore(&chip->gpio_lock[index], flags); index = xgpio_index(chip, i); @@ -165,7 +166,7 @@ static void xgpio_set_multiple(struct gpio_chip *gc, unsigned long *mask, } xgpio_writereg(chip->regs + XGPIO_DATA_OFFSET + - xgpio_regoffset(chip, i), chip->gpio_state[index]); + index * XGPIO_CHANNEL_OFFSET, chip->gpio_state[index]); spin_unlock_irqrestore(&chip->gpio_lock[index], flags); } -- cgit v1.2.3 From 2d5a2f913b658a7ae984773a63318ed4daadf4af Mon Sep 17 00:00:00 2001 From: Stephen Boyd Date: Tue, 21 Jan 2020 10:37:48 -0800 Subject: spmi: pmic-arb: Set lockdep class for hierarchical irq domains I see the following lockdep splat in the qcom pinctrl driver when attempting to suspend the device. WARNING: possible recursive locking detected 5.4.11 #3 Tainted: G W -------------------------------------------- cat/3074 is trying to acquire lock: ffffff81f49804c0 (&irq_desc_lock_class){-.-.}, at: __irq_get_desc_lock+0x64/0x94 but task is already holding lock: ffffff81f1cc10c0 (&irq_desc_lock_class){-.-.}, at: __irq_get_desc_lock+0x64/0x94 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&irq_desc_lock_class); lock(&irq_desc_lock_class); *** DEADLOCK *** May be due to missing lock nesting notation 6 locks held by cat/3074: #0: ffffff81f01d9420 (sb_writers#7){.+.+}, at: vfs_write+0xd0/0x1a4 #1: ffffff81bd7d2080 (&of->mutex){+.+.}, at: kernfs_fop_write+0x12c/0x1fc #2: ffffff81f4c322f0 (kn->count#337){.+.+}, at: kernfs_fop_write+0x134/0x1fc #3: ffffffe411a41d60 (system_transition_mutex){+.+.}, at: pm_suspend+0x108/0x348 #4: ffffff81f1c5e970 (&dev->mutex){....}, at: __device_suspend+0x168/0x41c #5: ffffff81f1cc10c0 (&irq_desc_lock_class){-.-.}, at: __irq_get_desc_lock+0x64/0x94 stack backtrace: CPU: 5 PID: 3074 Comm: cat Tainted: G W 5.4.11 #3 Hardware name: Google Cheza (rev3+) (DT) Call trace: dump_backtrace+0x0/0x174 show_stack+0x20/0x2c dump_stack+0xc8/0x124 __lock_acquire+0x460/0x2388 lock_acquire+0x1cc/0x210 _raw_spin_lock_irqsave+0x64/0x80 __irq_get_desc_lock+0x64/0x94 irq_set_irq_wake+0x40/0x144 qpnpint_irq_set_wake+0x28/0x34 set_irq_wake_real+0x40/0x5c irq_set_irq_wake+0x70/0x144 pm8941_pwrkey_suspend+0x34/0x44 platform_pm_suspend+0x34/0x60 dpm_run_callback+0x64/0xcc __device_suspend+0x310/0x41c dpm_suspend+0xf8/0x298 dpm_suspend_start+0x84/0xb4 suspend_devices_and_enter+0xbc/0x620 pm_suspend+0x210/0x348 state_store+0xb0/0x108 kobj_attr_store+0x14/0x24 sysfs_kf_write+0x4c/0x64 kernfs_fop_write+0x15c/0x1fc __vfs_write+0x54/0x18c vfs_write+0xe4/0x1a4 ksys_write+0x7c/0xe4 __arm64_sys_write+0x20/0x2c el0_svc_common+0xa8/0x160 el0_svc_handler+0x7c/0x98 el0_svc+0x8/0xc Set a lockdep class when we map the irq so that irq_set_wake() doesn't warn about a lockdep bug that doesn't exist. Fixes: 12a9eeaebba3 ("spmi: pmic-arb: convert to v2 irq interfaces to support hierarchical IRQ chips") Cc: Douglas Anderson Cc: Brian Masney Cc: Lina Iyer Cc: Maulik Shah Cc: Bjorn Andersson Signed-off-by: Stephen Boyd Link: https://lore.kernel.org/r/20200121183748.68662-1-swboyd@chromium.org Signed-off-by: Linus Walleij --- drivers/spmi/spmi-pmic-arb.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers') diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c index 97acc2ba2912..de844b412110 100644 --- a/drivers/spmi/spmi-pmic-arb.c +++ b/drivers/spmi/spmi-pmic-arb.c @@ -731,6 +731,7 @@ static int qpnpint_irq_domain_translate(struct irq_domain *d, return 0; } +static struct lock_class_key qpnpint_irq_lock_class, qpnpint_irq_request_class; static void qpnpint_irq_domain_map(struct spmi_pmic_arb *pmic_arb, struct irq_domain *domain, unsigned int virq, @@ -746,6 +747,9 @@ static void qpnpint_irq_domain_map(struct spmi_pmic_arb *pmic_arb, else handler = handle_level_irq; + + irq_set_lockdep_class(virq, &qpnpint_irq_lock_class, + &qpnpint_irq_request_class); irq_domain_set_info(domain, virq, hwirq, &pmic_arb_irqchip, pmic_arb, handler, NULL, NULL); } -- cgit v1.2.3 From a924eae75106258c0797706a0578c5af499c9ff5 Mon Sep 17 00:00:00 2001 From: Yash Shah Date: Tue, 28 Jan 2020 10:54:21 +0530 Subject: gpio: sifive: fix static checker warning Typcasting "irq_state" leads to the below static checker warning: The fix is to declare "irq_state" as unsigned long instead of u32. drivers/gpio/gpio-sifive.c:97 sifive_gpio_irq_enable() warn: passing casted pointer '&chip->irq_state' to 'assign_bit()' 32 vs 64. Fixes: 96868dce644d ("gpio/sifive: Add GPIO driver for SiFive SoCs") Reported-by: Dan Carpenter Signed-off-by: Yash Shah Link: https://lore.kernel.org/r/1580189061-14091-1-git-send-email-yash.shah@sifive.com Reviewed-by: Marc Zyngier Signed-off-by: Linus Walleij --- drivers/gpio/gpio-sifive.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/gpio/gpio-sifive.c b/drivers/gpio/gpio-sifive.c index 147a1bd04515..c54dd08f2cbf 100644 --- a/drivers/gpio/gpio-sifive.c +++ b/drivers/gpio/gpio-sifive.c @@ -35,7 +35,7 @@ struct sifive_gpio { void __iomem *base; struct gpio_chip gc; struct regmap *regs; - u32 irq_state; + unsigned long irq_state; unsigned int trigger[SIFIVE_GPIO_MAX]; unsigned int irq_parent[SIFIVE_GPIO_MAX]; }; @@ -94,7 +94,7 @@ static void sifive_gpio_irq_enable(struct irq_data *d) spin_unlock_irqrestore(&gc->bgpio_lock, flags); /* Enable interrupts */ - assign_bit(offset, (unsigned long *)&chip->irq_state, 1); + assign_bit(offset, &chip->irq_state, 1); sifive_gpio_set_ie(chip, offset); } @@ -104,7 +104,7 @@ static void sifive_gpio_irq_disable(struct irq_data *d) struct sifive_gpio *chip = gpiochip_get_data(gc); int offset = irqd_to_hwirq(d) % SIFIVE_GPIO_MAX; - assign_bit(offset, (unsigned long *)&chip->irq_state, 0); + assign_bit(offset, &chip->irq_state, 0); sifive_gpio_set_ie(chip, offset); irq_chip_disable_parent(d); } -- cgit v1.2.3