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From: Hans de Goede <hdegoede@redhat.com>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
	Bastien Nocera <hadess@hadess.net>
Cc: Hans de Goede <hdegoede@redhat.com>,
	linux-input@vger.kernel.org, kbuild test robot <lkp@intel.com>
Subject: [PATCH v2] Input: goodix - Fix compilation when ACPI support is disabled
Date: Wed, 25 Mar 2020 16:02:46 +0100
Message-ID: <20200325150246.128463-1-hdegoede@redhat.com> (raw)

acpi_evaluate_object() and acpi_execute_simple_method() are not part of
the group of ACPI related functions which get stubbed by
include/linux/acpi.h when ACPI support is disabled, so the
IRQ_PIN_ACCESS_ACPI_METHOD handling code must be disabled through
an #ifdef when ACPI support is not enabled.

For consistency also #ifdef out the IRQ_PIN_ACCESS_ACPI_GPIO code
and use the same #if condition as which is used to replace
goodix_add_acpi_gpio_mappings with a stub.

Fixes: c5fca485320e ("Input: goodix - add support for controlling the IRQ pin through ACPI methods")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
Changes in v2:
- Introduce ACPI_GPIO_SUPPORT helper define
- Use __maybe_unused for variables which will be unused when
  ACPI_GPIO_SUPPORT is not set
---
 drivers/input/touchscreen/goodix.c | 24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)

diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index 2c9cd1bfb860..7ccd8e436297 100644
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -63,13 +63,20 @@
 #define MAX_CONTACTS_LOC	5
 #define TRIGGER_LOC		6
 
+/* Our special handling for GPIO accesses through ACPI is x86 specific */
+#if defined CONFIG_X86 && defined CONFIG_ACPI
+#define ACPI_GPIO_SUPPORT
+#endif
+
 struct goodix_ts_data;
 
 enum goodix_irq_pin_access_method {
 	IRQ_PIN_ACCESS_NONE,
 	IRQ_PIN_ACCESS_GPIO,
+#ifdef ACPI_GPIO_SUPPORT
 	IRQ_PIN_ACCESS_ACPI_GPIO,
 	IRQ_PIN_ACCESS_ACPI_METHOD,
+#endif
 };
 
 struct goodix_chip_data {
@@ -572,8 +579,8 @@ static int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len)
 static int goodix_irq_direction_output(struct goodix_ts_data *ts,
 				       int value)
 {
-	struct device *dev = &ts->client->dev;
-	acpi_status status;
+	struct device *dev __maybe_unused = &ts->client->dev;
+	acpi_status status __maybe_unused;
 
 	switch (ts->irq_pin_access_method) {
 	case IRQ_PIN_ACCESS_NONE:
@@ -583,6 +590,7 @@ static int goodix_irq_direction_output(struct goodix_ts_data *ts,
 		return -EINVAL;
 	case IRQ_PIN_ACCESS_GPIO:
 		return gpiod_direction_output(ts->gpiod_int, value);
+#ifdef ACPI_GPIO_SUPPORT
 	case IRQ_PIN_ACCESS_ACPI_GPIO:
 		/*
 		 * The IRQ pin triggers on a falling edge, so its gets marked
@@ -593,6 +601,7 @@ static int goodix_irq_direction_output(struct goodix_ts_data *ts,
 		status = acpi_execute_simple_method(ACPI_HANDLE(dev),
 						    "INTO", value);
 		return ACPI_SUCCESS(status) ? 0 : -EIO;
+#endif
 	}
 
 	return -EINVAL; /* Never reached */
@@ -600,8 +609,8 @@ static int goodix_irq_direction_output(struct goodix_ts_data *ts,
 
 static int goodix_irq_direction_input(struct goodix_ts_data *ts)
 {
-	struct device *dev = &ts->client->dev;
-	acpi_status status;
+	struct device *dev __maybe_unused = &ts->client->dev;
+	acpi_status status __maybe_unused;
 
 	switch (ts->irq_pin_access_method) {
 	case IRQ_PIN_ACCESS_NONE:
@@ -610,12 +619,15 @@ static int goodix_irq_direction_input(struct goodix_ts_data *ts)
 			__func__);
 		return -EINVAL;
 	case IRQ_PIN_ACCESS_GPIO:
+		return gpiod_direction_input(ts->gpiod_int);
+#ifdef ACPI_GPIO_SUPPORT
 	case IRQ_PIN_ACCESS_ACPI_GPIO:
 		return gpiod_direction_input(ts->gpiod_int);
 	case IRQ_PIN_ACCESS_ACPI_METHOD:
 		status = acpi_evaluate_object(ACPI_HANDLE(dev), "INTI",
 					      NULL, NULL);
 		return ACPI_SUCCESS(status) ? 0 : -EIO;
+#endif
 	}
 
 	return -EINVAL; /* Never reached */
@@ -679,7 +691,7 @@ static int goodix_reset(struct goodix_ts_data *ts)
 	return 0;
 }
 
-#if defined CONFIG_X86 && defined CONFIG_ACPI
+#ifdef ACPI_GPIO_SUPPORT
 #include <asm/cpu_device_id.h>
 #include <asm/intel-family.h>
 
@@ -862,6 +874,7 @@ static int goodix_get_gpio_config(struct goodix_ts_data *ts)
 	ts->gpiod_rst = gpiod;
 
 	switch (ts->irq_pin_access_method) {
+#ifdef ACPI_GPIO_SUPPORT
 	case IRQ_PIN_ACCESS_ACPI_GPIO:
 		/*
 		 * We end up here if goodix_add_acpi_gpio_mappings() has
@@ -878,6 +891,7 @@ static int goodix_get_gpio_config(struct goodix_ts_data *ts)
 		if (!ts->gpiod_rst)
 			ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE;
 		break;
+#endif
 	default:
 		if (ts->gpiod_int && ts->gpiod_rst) {
 			ts->reset_controller_at_probe = true;
-- 
2.26.0.rc2


             reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-25 15:02 Hans de Goede [this message]
2020-04-01  1:45 ` Dmitry Torokhov
2020-04-01  9:14   ` Hans de Goede
2020-04-01  9:48     ` Bastien Nocera

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