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, Dmitry Mastykin <mastichi@gmail.com>
Subject: [PATCH 05/10] Input: goodix - Add support for getting IRQ + reset GPIOs on Bay Trail devices
Date: Wed, 1 Jan 2020 15:54:24 +0100 [thread overview]
Message-ID: <20200101145429.16185-5-hdegoede@redhat.com> (raw)
In-Reply-To: <20200101145429.16185-1-hdegoede@redhat.com>
On most Bay Trail (x86, UEFI + ACPI) devices the ACPI tables do not have
a _DSD with a "daffd814-6eba-4d8c-8a91-bc9bbf4aa301" UUID, adding
"irq-gpios" and "reset-gpios" mappings, so we cannot get the GPIOS by name
without first manually adding mappings ourselves.
These devices contain 2 GpioIo resource in their _CRS table, on all 4 such
devices which I have access to, the order of the 2 GPIOs is reset, int.
Note that the GPIO to which the touchscreen controller irq pin is connected
is configured in direct-irq mode on these Bay Trail devices, the
pinctrl-baytrail.c driver still allows controlling the pin as a GPIO in
this case, but this is not necessarily the case on other X86 ACPI
platforms, nor do we have a guarantee that the GPIO order is the same
elsewhere, so we limit the use of a _CRS table with 2 GpioIo resources
to Bay Trail devices only.
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1786317
BugLink: https://github.com/nexus511/gpd-ubuntu-packages/issues/10
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=199207
Cc: Dmitry Mastykin <mastichi@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/input/touchscreen/goodix.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index 9de2f325ac6e..d178aa33b529 100644
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -610,6 +610,21 @@ static int goodix_reset(struct goodix_ts_data *ts)
}
#if defined CONFIG_X86 && defined CONFIG_ACPI
+#include <asm/cpu_device_id.h>
+#include <asm/intel-family.h>
+
+static const struct x86_cpu_id baytrail_cpu_ids[] = {
+ { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, },
+ {}
+};
+
+static inline bool is_byt(void)
+{
+ const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids);
+
+ return !!id;
+}
+
static const struct acpi_gpio_params first_gpio = { 0, 0, false };
static const struct acpi_gpio_params second_gpio = { 1, 0, false };
@@ -675,6 +690,10 @@ static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts)
} else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) {
ts->irq_pin_access_method = irq_pin_access_acpi_gpio;
gpio_mapping = acpi_goodix_int_last_gpios;
+ } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) {
+ dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n");
+ ts->irq_pin_access_method = irq_pin_access_acpi_gpio;
+ gpio_mapping = acpi_goodix_int_last_gpios;
} else {
dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n",
ts->gpio_count, ts->gpio_int_idx);
--
2.24.1
next prev parent reply other threads:[~2020-01-01 14:54 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-01 14:54 [PATCH 01/10] Input: goodix - Refactor IRQ pin GPIO accesses Hans de Goede
2020-01-01 14:54 ` [PATCH 02/10] Input: goodix - Make loading the config from disk independent from the GPIO setup Hans de Goede
2020-01-01 14:54 ` [PATCH 03/10] Input: goodix - Make resetting the controller at probe " Hans de Goede
2020-01-01 14:54 ` [PATCH 04/10] Input: goodix - Add support for getting IRQ + reset GPIOs on Cherry Trail devices Hans de Goede
2020-01-01 14:54 ` Hans de Goede [this message]
2020-01-01 14:54 ` [PATCH 06/10] Input: goodix - Add support for controlling the IRQ pin through ACPI methods Hans de Goede
2020-01-01 14:54 ` [PATCH 07/10] Input: goodix - Move defines to above struct goodix_ts_data declaration Hans de Goede
2020-01-01 14:54 ` [PATCH 08/10] Input: goodix - Save a copy of the config from goodix_read_config() Hans de Goede
2020-01-01 14:54 ` [PATCH 09/10] Input: goodix - Make goodix_send_cfg() take a raw buffer as argument Hans de Goede
2020-01-01 14:54 ` [PATCH 10/10] Input: goodix - Restore config on resume if necessary Hans de Goede
2020-02-05 11:40 ` [PATCH 01/10] Input: goodix - Refactor IRQ pin GPIO accesses Hans de Goede
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