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authorChris Chiu <chiu@endlessm.com>2019-08-16 12:38:38 +0300
committerAndy Shevchenko <andriy.shevchenko@linux.intel.com>2019-08-19 12:41:44 +0300
commit6cb0880f08229360c6c57416de075aa96930be78 (patch)
treed4ca80a70091211c84b02beb8778b7f515d0f950
parent1bd231538c21d1cd691e71cbeeb4100fabc58068 (diff)
downloadlinux-6cb0880f08229360c6c57416de075aa96930be78.tar.xz
pinctrl: intel: remap the pin number to gpio offset for irq enabled pin
On Asus X571GT, GPIO 297 is configured as an interrupt and serves for the touchpad. The touchpad will report input events much less than expected after S3 suspend/resume, which results in extremely slow cursor movement. However, the number of interrupts observed from /proc/interrupts increases much more than expected even no touching touchpad. This is due to the value of PADCFG0 of PIN 225 for the interrupt has been changed from 0x80800102 to 0x80100102. The GPIROUTIOXAPIC is toggled on which results in the spurious interrupts. The PADCFG0 of PIN 225 is expected to be saved during suspend, but the 297 is saved instead because the gpiochip_line_is_irq() expect the GPIO offset but what's really passed to it is PIN number. In this case, the /sys/kernel/debug/pinctrl/INT3450:00/gpio-ranges shows 288: INT3450:00 GPIOS [436 - 459] PINS [216 - 239] So gpiochip_line_is_irq() returns true for GPIO offset 297, the suspend routine spuriously saves the content for PIN 297 which we expect to save for PIN 225. This commit maps the PIN number to GPIO offset first in the intel_pinctrl_should_save() to make sure the values for the specific PINs can be correctly saved and then restored. Fixes: c538b9436751 ("pinctrl: intel: Only restore pins that are used by the driver") Signed-off-by: Chris Chiu <chiu@endlessm.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
-rw-r--r--drivers/pinctrl/intel/pinctrl-intel.c25
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c
index 104dfaa78cb8..d66fe2b4221b 100644
--- a/drivers/pinctrl/intel/pinctrl-intel.c
+++ b/drivers/pinctrl/intel/pinctrl-intel.c
@@ -831,6 +831,29 @@ static int intel_gpio_to_pin(struct intel_pinctrl *pctrl, unsigned int offset,
return -EINVAL;
}
+/**
+ * intel_pin_to_gpio() - Translate from pin number to GPIO offset
+ * @pctrl: Pinctrl structure
+ * @pin: pin number
+ *
+ * Translate the pin number of pinctrl to GPIO offset
+ */
+static int intel_pin_to_gpio(struct intel_pinctrl *pctrl, int pin)
+{
+ const struct intel_community *community;
+ const struct intel_padgroup *padgrp;
+
+ community = intel_get_community(pctrl, pin);
+ if (!community)
+ return -EINVAL;
+
+ padgrp = intel_community_get_padgroup(community, pin);
+ if (!padgrp)
+ return -EINVAL;
+
+ return pin - padgrp->base + padgrp->gpio_base;
+}
+
static int intel_gpio_get(struct gpio_chip *chip, unsigned int offset)
{
struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
@@ -1468,7 +1491,7 @@ static bool intel_pinctrl_should_save(struct intel_pinctrl *pctrl, unsigned int
* them alone.
*/
if (pd->mux_owner || pd->gpio_owner ||
- gpiochip_line_is_irq(&pctrl->chip, pin))
+ gpiochip_line_is_irq(&pctrl->chip, intel_pin_to_gpio(pctrl, pin)))
return true;
return false;