From: Justin Chen <justinpo...@gmail.com>
Sometimes we have empty banks within the GPIO block. This commit allows
proper handling of 0 width GPIO banks. We handle 0 width GPIO banks by
incrementing the bank and number of GPIOs, but not initializing them.
This will mean a call into the non-existent GPIOs will return an error.
Also remove banks and GPIO information from the dev_info print. This
information is misleading since the incremented banks and gpio_base do
not reflect the actual GPIOs that got initialized. We leave this
information out since it is already printed with dev_dbg.
Signed-off-by: Justin Chen <justinpo...@gmail.com>
---
drivers/gpio/gpio-brcmstb.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/gpio/gpio-brcmstb.c b/drivers/gpio/gpio-brcmstb.c
index 16c7f9f..8658910 100644
--- a/drivers/gpio/gpio-brcmstb.c
+++ b/drivers/gpio/gpio-brcmstb.c
@@ -664,6 +664,18 @@ static int brcmstb_gpio_probe(struct platform_device *pdev)
struct brcmstb_gpio_bank *bank;
struct gpio_chip *gc;
+ /*
+ * If bank_width is 0, then there is an empty bank in the
+ * register block. Special handling for this case.
+ */
+ if (bank_width == 0) {
+ dev_dbg(dev, "Width 0 found: Empty bank @ %d\n",
+ num_banks);
+ num_banks++;
+ gpio_base += MAX_GPIO_PER_BANK;
+ continue;
+ }
+
bank = devm_kzalloc(dev, sizeof(*bank), GFP_KERNEL);
if (!bank) {
err = -ENOMEM;
@@ -740,8 +752,7 @@ static int brcmstb_gpio_probe(struct platform_device *pdev)
goto fail;
}
- dev_info(dev, "Registered %d banks (GPIO(s): %d-%d)\n",
- num_banks, priv->gpio_base, gpio_base - 1);
+ dev_info(dev, "Brcmstb GPIO registered\n");
if (priv->parent_wake_irq && need_wakeup_event)
pm_wakeup_event(dev, 0);
--
2.7.4
