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Diffstat (limited to 'drivers/mfd/rsmu_core.c')
-rw-r--r--drivers/mfd/rsmu_core.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/drivers/mfd/rsmu_core.c b/drivers/mfd/rsmu_core.c
new file mode 100644
index 000000000000..29437fd0bd5b
--- /dev/null
+++ b/drivers/mfd/rsmu_core.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Core driver for Renesas Synchronization Management Unit (SMU) devices.
+ *
+ * Copyright (C) 2021 Integrated Device Technology, Inc., a Renesas Company.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/rsmu.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#include "rsmu.h"
+
+enum {
+ RSMU_PHC = 0,
+ RSMU_CDEV = 1,
+ RSMU_N_DEVS = 2,
+};
+
+static struct mfd_cell rsmu_cm_devs[] = {
+ [RSMU_PHC] = {
+ .name = "8a3400x-phc",
+ },
+ [RSMU_CDEV] = {
+ .name = "8a3400x-cdev",
+ },
+};
+
+static struct mfd_cell rsmu_sabre_devs[] = {
+ [RSMU_PHC] = {
+ .name = "82p33x1x-phc",
+ },
+ [RSMU_CDEV] = {
+ .name = "82p33x1x-cdev",
+ },
+};
+
+static struct mfd_cell rsmu_sl_devs[] = {
+ [RSMU_PHC] = {
+ .name = "8v19n85x-phc",
+ },
+ [RSMU_CDEV] = {
+ .name = "8v19n85x-cdev",
+ },
+};
+
+int rsmu_core_init(struct rsmu_ddata *rsmu)
+{
+ struct mfd_cell *cells;
+ int ret;
+
+ switch (rsmu->type) {
+ case RSMU_CM:
+ cells = rsmu_cm_devs;
+ break;
+ case RSMU_SABRE:
+ cells = rsmu_sabre_devs;
+ break;
+ case RSMU_SL:
+ cells = rsmu_sl_devs;
+ break;
+ default:
+ dev_err(rsmu->dev, "Unsupported RSMU device type: %d\n", rsmu->type);
+ return -ENODEV;
+ }
+
+ mutex_init(&rsmu->lock);
+
+ ret = devm_mfd_add_devices(rsmu->dev, PLATFORM_DEVID_AUTO, cells,
+ RSMU_N_DEVS, NULL, 0, NULL);
+ if (ret < 0)
+ dev_err(rsmu->dev, "Failed to register sub-devices: %d\n", ret);
+
+ return ret;
+}
+
+void rsmu_core_exit(struct rsmu_ddata *rsmu)
+{
+ mutex_destroy(&rsmu->lock);
+}
+
+MODULE_DESCRIPTION("Renesas SMU core driver");
+MODULE_LICENSE("GPL");