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@@ -6,14 +6,22 @@
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#include <common.h>
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#include <asm/io.h>
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#include <dm.h>
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+#include <dm/device-internal.h>
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#include <linux/err.h>
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#include <linux/bitfield.h>
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#include <power-domain-uclass.h>
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+#include <reset-uclass.h>
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#include <regmap.h>
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#include <syscon.h>
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-#define APPLE_PMGR_PS_TARGET GENMASK(3, 0)
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+#define APPLE_PMGR_RESET BIT(31)
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+#define APPLE_PMGR_DEV_DISABLE BIT(10)
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+#define APPLE_PMGR_WAS_CLKGATED BIT(9)
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+#define APPLE_PMGR_WAS_PWRGATED BIT(8)
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#define APPLE_PMGR_PS_ACTUAL GENMASK(7, 4)
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+#define APPLE_PMGR_PS_TARGET GENMASK(3, 0)
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+
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+#define APPLE_PMGR_FLAGS (APPLE_PMGR_WAS_CLKGATED | APPLE_PMGR_WAS_PWRGATED)
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#define APPLE_PMGR_PS_ACTIVE 0xf
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#define APPLE_PMGR_PS_PWRGATE 0x0
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@@ -25,6 +33,65 @@ struct apple_pmgr_priv {
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u32 offset; /* offset within regmap for this domain */
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};
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+static int apple_reset_of_xlate(struct reset_ctl *reset_ctl,
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+ struct ofnode_phandle_args *args)
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+{
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+ if (args->args_count != 0)
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+ return -EINVAL;
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+
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+ return 0;
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+}
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+
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+static int apple_reset_request(struct reset_ctl *reset_ctl)
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+{
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+ return 0;
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+}
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+
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+static int apple_reset_free(struct reset_ctl *reset_ctl)
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+{
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+ return 0;
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+}
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+
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+static int apple_reset_assert(struct reset_ctl *reset_ctl)
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+{
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+ struct apple_pmgr_priv *priv = dev_get_priv(reset_ctl->dev->parent);
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+
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+ regmap_update_bits(priv->regmap, priv->offset,
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+ APPLE_PMGR_FLAGS | APPLE_PMGR_DEV_DISABLE,
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+ APPLE_PMGR_DEV_DISABLE);
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+ regmap_update_bits(priv->regmap, priv->offset,
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+ APPLE_PMGR_FLAGS | APPLE_PMGR_RESET,
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+ APPLE_PMGR_RESET);
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+
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+ return 0;
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+}
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+
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+static int apple_reset_deassert(struct reset_ctl *reset_ctl)
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+{
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+ struct apple_pmgr_priv *priv = dev_get_priv(reset_ctl->dev->parent);
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+
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+ regmap_update_bits(priv->regmap, priv->offset,
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+ APPLE_PMGR_FLAGS | APPLE_PMGR_RESET, 0);
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+ regmap_update_bits(priv->regmap, priv->offset,
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+ APPLE_PMGR_FLAGS | APPLE_PMGR_DEV_DISABLE, 0);
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+
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+ return 0;
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+}
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+
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+struct reset_ops apple_reset_ops = {
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+ .of_xlate = apple_reset_of_xlate,
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+ .request = apple_reset_request,
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+ .rfree = apple_reset_free,
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+ .rst_assert = apple_reset_assert,
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+ .rst_deassert = apple_reset_deassert,
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+};
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+
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+static struct driver apple_reset_driver = {
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+ .name = "apple_reset",
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+ .id = UCLASS_RESET,
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+ .ops = &apple_reset_ops,
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+};
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+
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static int apple_pmgr_request(struct power_domain *power_domain)
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{
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return 0;
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@@ -78,6 +145,7 @@ static const struct udevice_id apple_pmgr_ids[] = {
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static int apple_pmgr_probe(struct udevice *dev)
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{
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struct apple_pmgr_priv *priv = dev_get_priv(dev);
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+ struct udevice *child;
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int ret;
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ret = dev_power_domain_on(dev);
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@@ -92,6 +160,9 @@ static int apple_pmgr_probe(struct udevice *dev)
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if (ret < 0)
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return ret;
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+ device_bind(dev, &apple_reset_driver, "apple_reset", NULL,
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+ dev_ofnode(dev), &child);
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+
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return 0;
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}
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