8 files changed, 64 insertions, 21 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 87d567089f13..573c449c49b9 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -636,7 +636,7 @@ config GPIO_MAX7301
 
 config GPIO_MCP23S08
         tristate "Microchip MCP23xxx I/O expander"
-        depends on SPI_MASTER || I2C
+        depends on (SPI_MASTER && !I2C) || I2C
         help
           SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
           I/O expanders.
diff --git a/drivers/gpio/gpio-langwell.c b/drivers/gpio/gpio-langwell.c
index 634c3d37f7b5..62ef10a641c4 100644
--- a/drivers/gpio/gpio-langwell.c
+++ b/drivers/gpio/gpio-langwell.c
@@ -324,6 +324,7 @@ static int lnw_gpio_probe(struct pci_dev *pdev,
         resource_size_t start, len;
         struct lnw_gpio *lnw;
         u32 gpio_base;
+        u32 irq_base;
         int retval;
         int ngpio = id->driver_data;
 
@@ -345,6 +346,7 @@ static int lnw_gpio_probe(struct pci_dev *pdev,
                 retval = -EFAULT;
                 goto err_ioremap;
         }
+        irq_base = *(u32 *)base;
         gpio_base = *((u32 *)base + 1);
         /* release the IO mapping, since we already get the info from bar1 */
         iounmap(base);
@@ -365,13 +367,6 @@ static int lnw_gpio_probe(struct pci_dev *pdev,
                 goto err_ioremap;
         }
 
-        lnw->domain = irq_domain_add_linear(pdev->dev.of_node, ngpio,
-                                            &lnw_gpio_irq_ops, lnw);
-        if (!lnw->domain) {
-                retval = -ENOMEM;
-                goto err_ioremap;
-        }
-
         lnw->reg_base = base;
         lnw->chip.label = dev_name(&pdev->dev);
         lnw->chip.request = lnw_gpio_request;
@@ -384,6 +379,14 @@ static int lnw_gpio_probe(struct pci_dev *pdev,
         lnw->chip.ngpio = ngpio;
         lnw->chip.can_sleep = 0;
         lnw->pdev = pdev;
+
+        lnw->domain = irq_domain_add_simple(pdev->dev.of_node, ngpio, irq_base,
+                                            &lnw_gpio_irq_ops, lnw);
+        if (!lnw->domain) {
+                retval = -ENOMEM;
+                goto err_ioremap;
+        }
+
         pci_set_drvdata(pdev, lnw);
         retval = gpiochip_add(&lnw->chip);
         if (retval) {
diff --git a/drivers/gpio/gpio-ml-ioh.c b/drivers/gpio/gpio-ml-ioh.c
index b73366523fae..0966f2637ad2 100644
--- a/drivers/gpio/gpio-ml-ioh.c
+++ b/drivers/gpio/gpio-ml-ioh.c
@@ -496,8 +496,7 @@ err_irq_alloc_descs:
 err_gpiochip_add:
         while (--i >= 0) {
                 chip--;
-                ret = gpiochip_remove(&chip->gpio);
-                if (ret)
+                if (gpiochip_remove(&chip->gpio))
                         dev_err(&pdev->dev, "Failed gpiochip_remove(%d)\n", i);
         }
         kfree(chip_save);
diff --git a/drivers/gpio/gpio-mxs.c b/drivers/gpio/gpio-mxs.c
index 25000b0f8453..f8e6af20dfbf 100644
--- a/drivers/gpio/gpio-mxs.c
+++ b/drivers/gpio/gpio-mxs.c
@@ -326,7 +326,8 @@ static int mxs_gpio_probe(struct platform_device *pdev)
 
         err = bgpio_init(&port->bgc, &pdev->dev, 4,
                          port->base + PINCTRL_DIN(port),
-                         port->base + PINCTRL_DOUT(port), NULL,
+                         port->base + PINCTRL_DOUT(port) + MXS_SET,
+                         port->base + PINCTRL_DOUT(port) + MXS_CLR,
                          port->base + PINCTRL_DOE(port), NULL, 0);
         if (err)
                 goto out_irqdesc_free;
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 2050891d9c65..d3f7d2db870f 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -69,6 +69,7 @@ struct gpio_bank {
         bool is_mpuio;
         bool dbck_flag;
         bool loses_context;
+        bool context_valid;
         int stride;
         u32 width;
         int context_loss_count;
@@ -1128,6 +1129,10 @@ static int omap_gpio_probe(struct platform_device *pdev)
                         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;
         }
 
 
@@ -1178,9 +1183,6 @@ static int omap_gpio_probe(struct platform_device *pdev)
         omap_gpio_chip_init(bank);
         omap_gpio_show_rev(bank);
 
-        if (bank->loses_context)
-                bank->get_context_loss_count = pdata->get_context_loss_count;
-
         pm_runtime_put(bank->dev);
 
         list_add_tail(&bank->node, &omap_gpio_list);
@@ -1259,6 +1261,8 @@ update_gpio_context_count:
         return 0;
 }
 
+static void omap_gpio_init_context(struct gpio_bank *p);
+
 static int omap_gpio_runtime_resume(struct device *dev)
 {
         struct platform_device *pdev = to_platform_device(dev);
@@ -1268,6 +1272,20 @@ static int omap_gpio_runtime_resume(struct device *dev)
         int c;
 
         spin_lock_irqsave(&bank->lock, flags);
+
+        /*
+         * On the first resume during the probe, the context has not
+         * been initialised and so initialise it now. Also initialise
+         * the context loss count.
+         */
+        if (bank->loses_context && !bank->context_valid) {
+                omap_gpio_init_context(bank);
+
+                if (bank->get_context_loss_count)
+                        bank->context_loss_count =
+                                bank->get_context_loss_count(bank->dev);
+        }
+
         _gpio_dbck_enable(bank);
 
         /*
@@ -1384,6 +1402,29 @@ void omap2_gpio_resume_after_idle(void)
 }
 
 #if defined(CONFIG_PM_RUNTIME)
+static void omap_gpio_init_context(struct gpio_bank *p)
+{
+        struct omap_gpio_reg_offs *regs = p->regs;
+        void __iomem *base = p->base;
+
+        p->context.ctrl         = __raw_readl(base + regs->ctrl);
+        p->context.oe           = __raw_readl(base + regs->direction);
+        p->context.wake_en      = __raw_readl(base + regs->wkup_en);
+        p->context.leveldetect0 = __raw_readl(base + regs->leveldetect0);
+        p->context.leveldetect1 = __raw_readl(base + regs->leveldetect1);
+        p->context.risingdetect = __raw_readl(base + regs->risingdetect);
+        p->context.fallingdetect = __raw_readl(base + regs->fallingdetect);
+        p->context.irqenable1   = __raw_readl(base + regs->irqenable);
+        p->context.irqenable2   = __raw_readl(base + regs->irqenable2);
+
+        if (regs->set_dataout && p->regs->clr_dataout)
+                p->context.dataout = __raw_readl(base + regs->set_dataout);
+        else
+                p->context.dataout = __raw_readl(base + regs->dataout);
+
+        p->context_valid = true;
+}
+
 static void omap_gpio_restore_context(struct gpio_bank *bank)
 {
         __raw_writel(bank->context.wake_en,
@@ -1421,6 +1462,7 @@ static void omap_gpio_restore_context(struct gpio_bank *bank)
 #else
 #define omap_gpio_runtime_suspend NULL
 #define omap_gpio_runtime_resume NULL
+static void omap_gpio_init_context(struct gpio_bank *p) {}
 #endif
 
 static const struct dev_pm_ops gpio_pm_ops = {
diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c
index cdf599687cf7..0fec097e838d 100644
--- a/drivers/gpio/gpio-pch.c
+++ b/drivers/gpio/gpio-pch.c
@@ -424,8 +424,7 @@ end:
 err_request_irq:
         irq_free_descs(irq_base, gpio_pins[chip->ioh]);
 
-        ret = gpiochip_remove(&chip->gpio);
-        if (ret)
+        if (gpiochip_remove(&chip->gpio))
                 dev_err(&pdev->dev, "%s gpiochip_remove failed\n", __func__);
 
 err_gpiochip_add:
diff --git a/drivers/gpio/gpio-sch.c b/drivers/gpio/gpio-sch.c
index 1e4de16ceb41..5af65719b95d 100644
--- a/drivers/gpio/gpio-sch.c
+++ b/drivers/gpio/gpio-sch.c
@@ -272,10 +272,8 @@ static int sch_gpio_probe(struct platform_device *pdev)
         return 0;
 
 err_sch_gpio_resume:
-        err = gpiochip_remove(&sch_gpio_core);
-        if (err)
-                dev_err(&pdev->dev, "%s failed, %d\n",
-                                "gpiochip_remove()", err);
+        if (gpiochip_remove(&sch_gpio_core))
+                dev_err(&pdev->dev, "%s gpiochip_remove failed\n", __func__);
 
 err_sch_gpio_core:
         release_region(res->start, resource_size(res));
diff --git a/drivers/gpio/gpio-viperboard.c b/drivers/gpio/gpio-viperboard.c
index 095ab14cea4d..5ac2919197fe 100644
--- a/drivers/gpio/gpio-viperboard.c
+++ b/drivers/gpio/gpio-viperboard.c
@@ -446,7 +446,8 @@ static int vprbrd_gpio_probe(struct platform_device *pdev)
         return ret;
 
 err_gpiob:
-        ret = gpiochip_remove(&vb_gpio->gpioa);
+        if (gpiochip_remove(&vb_gpio->gpioa))
+                dev_err(&pdev->dev, "%s gpiochip_remove failed\n", __func__);
 
 err_gpioa:
         return ret;