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path: root/drivers/gpio/gpio-elkhartlake.c
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Diffstat (limited to 'drivers/gpio/gpio-elkhartlake.c')
-rw-r--r--drivers/gpio/gpio-elkhartlake.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-elkhartlake.c b/drivers/gpio/gpio-elkhartlake.c
new file mode 100644
index 0000000000..a9c8b16215
--- /dev/null
+++ b/drivers/gpio/gpio-elkhartlake.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Intel Elkhart Lake PSE GPIO driver
+ *
+ * Copyright (c) 2023 Intel Corporation.
+ *
+ * Authors: Pandith N <pandith.n@intel.com>
+ * Raag Jadav <raag.jadav@intel.com>
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+
+#include "gpio-tangier.h"
+
+/* Each Intel EHL PSE GPIO Controller has 30 GPIO pins */
+#define EHL_PSE_NGPIO 30
+
+static int ehl_gpio_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct tng_gpio *priv;
+ int irq, ret;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->reg_base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(priv->reg_base))
+ return PTR_ERR(priv->reg_base);
+
+ priv->dev = dev;
+ priv->irq = irq;
+
+ priv->info.base = -1;
+ priv->info.ngpio = EHL_PSE_NGPIO;
+
+ priv->wake_regs.gwmr = GWMR_EHL;
+ priv->wake_regs.gwsr = GWSR_EHL;
+ priv->wake_regs.gsir = GSIR_EHL;
+
+ ret = devm_tng_gpio_probe(dev, priv);
+ if (ret)
+ return dev_err_probe(dev, ret, "tng_gpio_probe error\n");
+
+ platform_set_drvdata(pdev, priv);
+ return 0;
+}
+
+static int ehl_gpio_suspend(struct device *dev)
+{
+ return tng_gpio_suspend(dev);
+}
+
+static int ehl_gpio_resume(struct device *dev)
+{
+ return tng_gpio_resume(dev);
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(ehl_gpio_pm_ops, ehl_gpio_suspend, ehl_gpio_resume);
+
+static const struct platform_device_id ehl_gpio_ids[] = {
+ { "gpio-elkhartlake" },
+ { }
+};
+MODULE_DEVICE_TABLE(platform, ehl_gpio_ids);
+
+static struct platform_driver ehl_gpio_driver = {
+ .driver = {
+ .name = "gpio-elkhartlake",
+ .pm = pm_sleep_ptr(&ehl_gpio_pm_ops),
+ },
+ .probe = ehl_gpio_probe,
+ .id_table = ehl_gpio_ids,
+};
+module_platform_driver(ehl_gpio_driver);
+
+MODULE_AUTHOR("Pandith N <pandith.n@intel.com>");
+MODULE_AUTHOR("Raag Jadav <raag.jadav@intel.com>");
+MODULE_DESCRIPTION("Intel Elkhart Lake PSE GPIO driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(GPIO_TANGIER);