linux-kernel - [PATCH] gpio:gpio-amdpt:add new device and that 24-pin support

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Date:   Tue,  7 Dec 2021 17:42:39 +0800
From:   Richard Hsu <saraon640529@...il.com>
To:     linus.walleij@...aro.org, brgl@...ev.pl,
        Richard_Hsu@...edia.com.tw, andriy.shevchenko@...ux.intel.com
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Yd_Tseng@...edia.com.tw, Cindy1_Hsu@...edia.com.tw,
        Andrew_Su@...edia.com.tw
Subject: [PATCH] gpio:gpio-amdpt:add new device and that 24-pin support

From: RichardHsu <Richard_Hsu@...edia.com.tw>

New ACPI gpio device(AMDIF031) support 24 gpio pins. We add new device id and pin number to .driver_data of acpi_device_id structure
and then retrieve it by device_get_match_data() that Andy suggest it.

Signed-off-by: RichardHsu <Richard_Hsu@...edia.com.tw>
---
 drivers/gpio/gpio-amdpt.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpio-amdpt.c b/drivers/gpio/gpio-amdpt.c
index bbf53e289141..a45693423a07 100644
--- a/drivers/gpio/gpio-amdpt.c
+++ b/drivers/gpio/gpio-amdpt.c
@@ -14,6 +14,7 @@
 #include <linux/platform_device.h>

 #define PT_TOTAL_GPIO 8
+#define PT_TOTAL_GPIO_EX 24

 /* PCI-E MMIO register offsets */
 #define PT_DIRECTION_REG   0x00
@@ -103,7 +104,8 @@ static int pt_gpio_probe(struct platform_device *pdev)
 	pt_gpio->gc.owner            = THIS_MODULE;
 	pt_gpio->gc.request          = pt_gpio_request;
 	pt_gpio->gc.free             = pt_gpio_free;
-	pt_gpio->gc.ngpio            = PT_TOTAL_GPIO;
+	/* retrieve pin number from .driver_data of acpi_device_id structure */
+	pt_gpio->gc.ngpio            = (uintptr_t)device_get_match_data(dev);
 #if defined(CONFIG_OF_GPIO)
 	pt_gpio->gc.of_node          = dev->of_node;
 #endif
@@ -133,8 +135,9 @@ static int pt_gpio_remove(struct platform_device *pdev)
 }

 static const struct acpi_device_id pt_gpio_acpi_match[] = {
-	{ "AMDF030", 0 },
-	{ "AMDIF030", 0 },
+	{ "AMDF030", PT_TOTAL_GPIO },
+	{ "AMDIF030", PT_TOTAL_GPIO },
+	{ "AMDIF031", PT_TOTAL_GPIO_EX },
 	{ },
 };
 MODULE_DEVICE_TABLE(acpi, pt_gpio_acpi_match);
--
2.30.2