From 8abdd2d2d873ece35a201c2e05af7b6998cf0dca Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 24 Jul 2012 13:55:10 +0100 Subject: gpio-sch: Fix leak of resource Signed-off-by: Alan Cox Signed-off-by: Linus Walleij --- drivers/gpio/gpio-sch.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-sch.c b/drivers/gpio/gpio-sch.c index 424dce8e3f30..8707d4572a06 100644 --- a/drivers/gpio/gpio-sch.c +++ b/drivers/gpio/gpio-sch.c @@ -241,7 +241,8 @@ static int __devinit sch_gpio_probe(struct platform_device *pdev) break; default: - return -ENODEV; + err = -ENODEV; + goto err_sch_gpio_core; } sch_gpio_core.dev = &pdev->dev; -- cgit v1.2.3 From f7da0bdbf585c0404fc89901ee4bdb806e70530f Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Tue, 24 Jul 2012 18:35:16 +0800 Subject: gpio: msic: Fix calculating register address in msic_gpio_to_oreg() In the case offset is 20 ... 23, the equation to get the register should be: INTEL_MSIC_GPIO1HV0CTLO - offset + 20 With above equation, we can get below mapping between offset and the register: offset is 20: INTEL_MSIC_GPIO1HV0CTLO offset is 21: INTEL_MSIC_GPIO1HV1CTLO offset is 22: INTEL_MSIC_GPIO1HV2CTLO offset is 23: INTEL_MSIC_GPIO1HV3CTLO Signed-off-by: Axel Lin Acked-by: Mathias Nyman Signed-off-by: Linus Walleij --- drivers/gpio/gpio-msic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-msic.c b/drivers/gpio/gpio-msic.c index 71a838f44501..b38986285868 100644 --- a/drivers/gpio/gpio-msic.c +++ b/drivers/gpio/gpio-msic.c @@ -99,7 +99,7 @@ static int msic_gpio_to_oreg(unsigned offset) if (offset < 20) return INTEL_MSIC_GPIO0HV0CTLO - offset + 16; - return INTEL_MSIC_GPIO1HV0CTLO + offset + 20; + return INTEL_MSIC_GPIO1HV0CTLO - offset + 20; } static int msic_gpio_direction_input(struct gpio_chip *chip, unsigned offset) -- cgit v1.2.3 From 72121572670973bec6fb1b9fdb454b106b253235 Mon Sep 17 00:00:00 2001 From: Daniel Mack Date: Wed, 25 Jul 2012 17:35:39 +0200 Subject: GPIO: gpio-pxa: fix devicetree functions Provide an of_xlate function for the PXA GPIO chips and make it work for devicetree environments. Successfully tested on a PXA3xx board. Signed-off-by: Daniel Mack Acked-by: Haojian Zhuang Signed-off-by: Linus Walleij --- drivers/gpio/gpio-pxa.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-pxa.c b/drivers/gpio/gpio-pxa.c index 58a6a63a6ece..793767b0962a 100644 --- a/drivers/gpio/gpio-pxa.c +++ b/drivers/gpio/gpio-pxa.c @@ -62,6 +62,7 @@ int pxa_last_gpio; #ifdef CONFIG_OF static struct irq_domain *domain; +static struct device_node *pxa_gpio_of_node; #endif struct pxa_gpio_chip { @@ -277,6 +278,24 @@ static void pxa_gpio_set(struct gpio_chip *chip, unsigned offset, int value) (value ? GPSR_OFFSET : GPCR_OFFSET)); } +#ifdef CONFIG_OF_GPIO +static int pxa_gpio_of_xlate(struct gpio_chip *gc, + const struct of_phandle_args *gpiospec, + u32 *flags) +{ + if (gpiospec->args[0] > pxa_last_gpio) + return -EINVAL; + + if (gc != &pxa_gpio_chips[gpiospec->args[0] / 32].chip) + return -EINVAL; + + if (flags) + *flags = gpiospec->args[1]; + + return gpiospec->args[0] % 32; +} +#endif + static int __devinit pxa_init_gpio_chip(int gpio_end, int (*set_wake)(unsigned int, unsigned int)) { @@ -304,6 +323,11 @@ static int __devinit pxa_init_gpio_chip(int gpio_end, c->get = pxa_gpio_get; c->set = pxa_gpio_set; c->to_irq = pxa_gpio_to_irq; +#ifdef CONFIG_OF_GPIO + c->of_node = pxa_gpio_of_node; + c->of_xlate = pxa_gpio_of_xlate; + c->of_gpio_n_cells = 2; +#endif /* number of GPIOs on last bank may be less than 32 */ c->ngpio = (gpio + 31 > gpio_end) ? (gpio_end - gpio + 1) : 32; @@ -505,6 +529,7 @@ static int pxa_irq_domain_map(struct irq_domain *d, unsigned int irq, const struct irq_domain_ops pxa_irq_domain_ops = { .map = pxa_irq_domain_map, + .xlate = irq_domain_xlate_twocell, }; #ifdef CONFIG_OF @@ -545,6 +570,7 @@ static int __devinit pxa_gpio_probe_dt(struct platform_device *pdev) } domain = irq_domain_add_legacy(np, nr_gpios, irq_base, 0, &pxa_irq_domain_ops, NULL); + pxa_gpio_of_node = np; return 0; err: iounmap(gpio_reg_base); -- cgit v1.2.3 From f6b0ca25ee402f714487b31c35f8e11f2bf4310b Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Sun, 5 Aug 2012 14:01:25 +0800 Subject: gpio/mxc: remove redundant shadow variables initialization With commit 3e11f7b (gpio/generic: initialize basic_mmio_gpio shadow variables properly) in place, the shadow variables initialization is being done in generic driver bgpio_init call. Remove the redundant shadow variables initialization from gpio-mxc driver. Signed-off-by: Shawn Guo Tested-by: Dirk Behme Signed-off-by: Linus Walleij --- drivers/gpio/gpio-mxc.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c index 4db460b6ecf7..76e8cda9c06f 100644 --- a/drivers/gpio/gpio-mxc.c +++ b/drivers/gpio/gpio-mxc.c @@ -466,8 +466,6 @@ static int __devinit mxc_gpio_probe(struct platform_device *pdev) port->bgc.gc.to_irq = mxc_gpio_to_irq; port->bgc.gc.base = pdev->id * 32; - port->bgc.dir = port->bgc.read_reg(port->bgc.reg_dir); - port->bgc.data = port->bgc.read_reg(port->bgc.reg_set); err = gpiochip_add(&port->bgc.gc); if (err) -- cgit v1.2.3 From 7e6086d9e54a159a6257c02bb7fc5805c614aad2 Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Sun, 5 Aug 2012 14:01:26 +0800 Subject: gpio/mxc: specify gpio base for device tree probe MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently, unlike the non-DT probe where the gpio base is specified with pdev->id, the DT probe uses the base dynamically allocated by gpio core, which uses a completely different numbering scheme. This causes two issues to user space applications which access sysfs entry /sys/class/gpio/gpioN. * It breaks the compatibility with user space applications between non-DT and DT kernels. * It's not intuitive and sometimes hard for users to map the Linux gpio number to the actual hardware pin. Use alias to identify the gpio port/bank, and then the gpio base can be specified with port id to solve above issues. If alias is not defined in device tree, the base number dynamically allocated by gpio core will be used. Signed-off-by: Shawn Guo Tested-by: Uwe Kleine-König Signed-off-by: Linus Walleij --- drivers/gpio/gpio-mxc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c index 76e8cda9c06f..80f44bb64a87 100644 --- a/drivers/gpio/gpio-mxc.c +++ b/drivers/gpio/gpio-mxc.c @@ -465,7 +465,8 @@ static int __devinit mxc_gpio_probe(struct platform_device *pdev) goto out_iounmap; port->bgc.gc.to_irq = mxc_gpio_to_irq; - port->bgc.gc.base = pdev->id * 32; + port->bgc.gc.base = (pdev->id < 0) ? of_alias_get_id(np, "gpio") * 32 : + pdev->id * 32; err = gpiochip_add(&port->bgc.gc); if (err) -- cgit v1.2.3 From f7093f3e7a50bfeeceb8950f9130cbf8af74bf92 Mon Sep 17 00:00:00 2001 From: Sean Paul Date: Fri, 20 Jul 2012 13:58:59 -0700 Subject: gpio: samsung: Fix off-by-one bug in gpio addresses Move gpc4 to the end of the automatically processed gpio controllers so we don't taint the automatic offset calculation. This bug caused all controllers coming after gpc4 to map to the incorrect address. The result is <&gpd1 0 0 0 0> would actually map to GPIO 0 in gpd0. Signed-off-by: Sean Paul Reviewed-by: Thomas Abraham Acked-by: Doug Anderson Acked-by: Kukjin Kim Signed-off-by: Linus Walleij --- drivers/gpio/gpio-samsung.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-samsung.c b/drivers/gpio/gpio-samsung.c index 92f7b2bb79d4..ba126cc04073 100644 --- a/drivers/gpio/gpio-samsung.c +++ b/drivers/gpio/gpio-samsung.c @@ -2452,12 +2452,6 @@ static struct samsung_gpio_chip exynos5_gpios_1[] = { .ngpio = EXYNOS5_GPIO_C3_NR, .label = "GPC3", }, - }, { - .chip = { - .base = EXYNOS5_GPC4(0), - .ngpio = EXYNOS5_GPIO_C4_NR, - .label = "GPC4", - }, }, { .chip = { .base = EXYNOS5_GPD0(0), @@ -2512,6 +2506,12 @@ static struct samsung_gpio_chip exynos5_gpios_1[] = { .ngpio = EXYNOS5_GPIO_Y6_NR, .label = "GPY6", }, + }, { + .chip = { + .base = EXYNOS5_GPC4(0), + .ngpio = EXYNOS5_GPIO_C4_NR, + .label = "GPC4", + }, }, { .config = &samsung_gpio_cfgs[9], .irq_base = IRQ_EINT(0), @@ -2836,7 +2836,7 @@ static __init void exynos5_gpiolib_init(void) } /* need to set base address for gpc4 */ - exynos5_gpios_1[11].base = gpio_base1 + 0x2E0; + exynos5_gpios_1[20].base = gpio_base1 + 0x2E0; /* need to set base address for gpx */ chip = &exynos5_gpios_1[21]; -- cgit v1.2.3 From d6a2b7ba67334a7e72cd153c142c449831557cb9 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Sun, 5 Aug 2012 11:52:34 +0200 Subject: drivers/gpio/gpio-langwell.c: fix error return code Convert a 0 error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // @@ identifier ret; expression e,e1,e2,e3,e4,x; @@ ( if (\(ret != 0\|ret < 0\) || ...) { ... return ...; } | ret = 0 ) ... when != ret = e1 *x = \(kmalloc\|kzalloc\|kcalloc\|devm_kzalloc\|ioremap\|ioremap_nocache\|devm_ioremap\|devm_ioremap_nocache\)(...); ... when != x = e2 when != ret = e3 *if (x == NULL || ...) { ... when != ret = e4 * return ret; } // Signed-off-by: Julia Lawall Signed-off-by: Linus Walleij --- drivers/gpio/gpio-langwell.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-langwell.c b/drivers/gpio/gpio-langwell.c index a1c8754f52cf..202a99207b7d 100644 --- a/drivers/gpio/gpio-langwell.c +++ b/drivers/gpio/gpio-langwell.c @@ -339,7 +339,7 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev, resource_size_t start, len; struct lnw_gpio *lnw; u32 gpio_base; - int retval = 0; + int retval; int ngpio = id->driver_data; retval = pci_enable_device(pdev); @@ -357,6 +357,7 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev, base = ioremap_nocache(start, len); if (!base) { dev_err(&pdev->dev, "error mapping bar1\n"); + retval = -EFAULT; goto err3; } gpio_base = *((u32 *)base + 1); @@ -381,8 +382,10 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev, lnw->domain = irq_domain_add_linear(pdev->dev.of_node, ngpio, &lnw_gpio_irq_ops, lnw); - if (!lnw->domain) + if (!lnw->domain) { + retval = -ENOMEM; goto err3; + } lnw->reg_base = base; lnw->chip.label = dev_name(&pdev->dev); -- cgit v1.2.3 From 38eaed327dc5bea2e5548ea3d195de83a2070c6d Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Sat, 4 Aug 2012 10:33:24 +0000 Subject: gpio: em: do not discard em_gio_irq_domain_cleanup The newly added gpio-em driver marks its em_gio_irq_domain_cleanup function as __devexit, which would lead to that function being discarded in case CONFIG_HOTPLUG is disabled. However, the function is also called by the error handling logic em_gio_probe, which would cause a jump into a NULL pointer if it was removed from the kernel or module. Without this patch, building kzm9d_defconfig results in: WARNING: drivers/gpio/built-in.o(.devinit.text+0x330): Section mismatch in reference from the function em_gio_probe() to the function .devexit.text:em_gio_irq_domain_cleanup() The function __devinit em_gio_probe() references a function __devexit em_gio_irq_domain_cleanup(). This is often seen when error handling in the init function uses functionality in the exit path. The fix is often to remove the __devexit annotation of em_gio_irq_domain_cleanup() so it may be used outside an exit section. Signed-off-by: Arnd Bergmann Cc: Magnus Damm Cc: Linus Walleij Cc: Rafael J. Wysocki --- drivers/gpio/gpio-em.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-em.c b/drivers/gpio/gpio-em.c index 150d9768811d..ae37181798b3 100644 --- a/drivers/gpio/gpio-em.c +++ b/drivers/gpio/gpio-em.c @@ -266,7 +266,7 @@ static int __devinit em_gio_irq_domain_init(struct em_gio_priv *p) return 0; } -static void __devexit em_gio_irq_domain_cleanup(struct em_gio_priv *p) +static void em_gio_irq_domain_cleanup(struct em_gio_priv *p) { struct gpio_em_config *pdata = p->pdev->dev.platform_data; -- cgit v1.2.3 From f43e04ec46b67071d432fc3f368dc9891a3443e5 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 13 Aug 2012 14:36:10 +0000 Subject: GPIO: gpio-pxa: fix building without CONFIG_OF Commit 7212157267 ("GPIO: gpio-pxa: fix devicetree functions") added an "xlate" function pointer to the irq_domain_ops, but this function is nor declared or defined anywhere when CONFIG_OF is disabled, causing the build error: drivers/gpio/gpio-pxa.c:532:11: error: 'irq_domain_xlate_twocell' undeclared here (not in a function) Extending the DT-only code section to cover the irq_domain_ops and the pxa_gpio_dt_ids solves this problem and makes it clearer which code is actually used without DT. Signed-off-by: Arnd Bergmann Signed-off-by: Linus Torvalds --- drivers/gpio/gpio-pxa.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-pxa.c b/drivers/gpio/gpio-pxa.c index 793767b0962a..9cac88a65f78 100644 --- a/drivers/gpio/gpio-pxa.c +++ b/drivers/gpio/gpio-pxa.c @@ -512,6 +512,7 @@ static int pxa_gpio_nums(void) return count; } +#ifdef CONFIG_OF static struct of_device_id pxa_gpio_dt_ids[] = { { .compatible = "mrvl,pxa-gpio" }, { .compatible = "mrvl,mmp-gpio", .data = (void *)MMP_GPIO }, @@ -532,7 +533,6 @@ const struct irq_domain_ops pxa_irq_domain_ops = { .xlate = irq_domain_xlate_twocell, }; -#ifdef CONFIG_OF static int __devinit pxa_gpio_probe_dt(struct platform_device *pdev) { int ret, nr_banks, nr_gpios, irq_base; @@ -679,7 +679,7 @@ static struct platform_driver pxa_gpio_driver = { .probe = pxa_gpio_probe, .driver = { .name = "pxa-gpio", - .of_match_table = pxa_gpio_dt_ids, + .of_match_table = of_match_ptr(pxa_gpio_dt_ids), }, }; -- cgit v1.2.3