gpio/generic: initialize basic_mmio_gpio shadow variables properly
It fixes the issue in gpio-generic that commit fb14921 (gpio/mxc: add
missing initialization of basic_mmio_gpio shadow variables) manged to
fix in gpio-mxc driver, so that other platform specific drivers do not
suffer from the same problem over and over again.
Changes since v1:
* Turn the last parameter of bgpio_init() "bool big_endian" into
"unsigned long flags" and give those really quirky hardwares a
chance to tell that reg_set and reg_dir are unreadable.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
[grant.likely: Fix big-endian usage to explicitly set BBGPIOF_BIG_ENDIAN]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/gpio/gpio-ep93xx.c b/drivers/gpio/gpio-ep93xx.c
index 776b772..9fe5b8fe 100644
--- a/drivers/gpio/gpio-ep93xx.c
+++ b/drivers/gpio/gpio-ep93xx.c
@@ -325,7 +325,7 @@
void __iomem *dir = mmio_base + bank->dir;
int err;
- err = bgpio_init(bgc, dev, 1, data, NULL, NULL, dir, NULL, false);
+ err = bgpio_init(bgc, dev, 1, data, NULL, NULL, dir, NULL, 0);
if (err)
return err;
diff --git a/drivers/gpio/gpio-generic.c b/drivers/gpio/gpio-generic.c
index e38dd0c..82e2e4f 100644
--- a/drivers/gpio/gpio-generic.c
+++ b/drivers/gpio/gpio-generic.c
@@ -364,7 +364,7 @@
int bgpio_init(struct bgpio_chip *bgc, struct device *dev,
unsigned long sz, void __iomem *dat, void __iomem *set,
void __iomem *clr, void __iomem *dirout, void __iomem *dirin,
- bool big_endian)
+ unsigned long flags)
{
int ret;
@@ -385,7 +385,7 @@
if (ret)
return ret;
- ret = bgpio_setup_accessors(dev, bgc, big_endian);
+ ret = bgpio_setup_accessors(dev, bgc, flags & BGPIOF_BIG_ENDIAN);
if (ret)
return ret;
@@ -394,6 +394,11 @@
return ret;
bgc->data = bgc->read_reg(bgc->reg_dat);
+ if (bgc->gc.set == bgpio_set_set &&
+ !(flags & BGPIOF_UNREADABLE_REG_SET))
+ bgc->data = bgc->read_reg(bgc->reg_set);
+ if (bgc->reg_dir && !(flags & BGPIOF_UNREADABLE_REG_DIR))
+ bgc->dir = bgc->read_reg(bgc->reg_dir);
return ret;
}
@@ -449,7 +454,7 @@
void __iomem *dirout;
void __iomem *dirin;
unsigned long sz;
- bool be;
+ unsigned long flags = 0;
int err;
struct bgpio_chip *bgc;
struct bgpio_pdata *pdata = dev_get_platdata(dev);
@@ -480,13 +485,14 @@
if (err)
return err;
- be = !strcmp(platform_get_device_id(pdev)->name, "basic-mmio-gpio-be");
+ if (!strcmp(platform_get_device_id(pdev)->name, "basic-mmio-gpio-be"))
+ flags |= BGPIOF_BIG_ENDIAN;
bgc = devm_kzalloc(&pdev->dev, sizeof(*bgc), GFP_KERNEL);
if (!bgc)
return -ENOMEM;
- err = bgpio_init(bgc, dev, sz, dat, set, clr, dirout, dirin, be);
+ err = bgpio_init(bgc, dev, sz, dat, set, clr, dirout, dirin, flags);
if (err)
return err;
diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c
index e791476..c337143 100644
--- a/drivers/gpio/gpio-mxc.c
+++ b/drivers/gpio/gpio-mxc.c
@@ -417,7 +417,7 @@
err = bgpio_init(&port->bgc, &pdev->dev, 4,
port->base + GPIO_PSR,
port->base + GPIO_DR, NULL,
- port->base + GPIO_GDIR, NULL, false);
+ port->base + GPIO_GDIR, NULL, 0);
if (err)
goto out_iounmap;
diff --git a/drivers/gpio/gpio-mxs.c b/drivers/gpio/gpio-mxs.c
index 385c58e..b413650 100644
--- a/drivers/gpio/gpio-mxs.c
+++ b/drivers/gpio/gpio-mxs.c
@@ -244,7 +244,7 @@
err = bgpio_init(&port->bgc, &pdev->dev, 4,
port->base + PINCTRL_DIN(port->id),
port->base + PINCTRL_DOUT(port->id), NULL,
- port->base + PINCTRL_DOE(port->id), NULL, false);
+ port->base + PINCTRL_DOE(port->id), NULL, 0);
if (err)
goto out_iounmap;
diff --git a/drivers/gpio/gpio-sodaville.c b/drivers/gpio/gpio-sodaville.c
index 820209c..9d9891f 100644
--- a/drivers/gpio/gpio-sodaville.c
+++ b/drivers/gpio/gpio-sodaville.c
@@ -224,7 +224,7 @@
ret = bgpio_init(&sd->bgpio, &pdev->dev, 4,
sd->gpio_pub_base + GPINR, sd->gpio_pub_base + GPOUTR,
- NULL, sd->gpio_pub_base + GPOER, NULL, false);
+ NULL, sd->gpio_pub_base + GPOER, NULL, 0);
if (ret)
goto unmap;
sd->bgpio.gc.ngpio = SDV_NUM_PUB_GPIOS;