clk: move clk-ti-sci driver to 'ti' directory
The patch moves the clk-ti-sci.c file to the 'ti' directory along with
all the other TI's drivers, and renames it clk-sci.c.
Signed-off-by: Dario Binacchi <dariobin@libero.it>
diff --git a/drivers/clk/ti/Kconfig b/drivers/clk/ti/Kconfig
index 9e257a2..2dc86d4 100644
--- a/drivers/clk/ti/Kconfig
+++ b/drivers/clk/ti/Kconfig
@@ -33,3 +33,11 @@
depends on CLK && OF_CONTROL && CLK_CCF
help
This enables the mux clock driver support on TI's SoCs.
+
+config CLK_TI_SCI
+ bool "TI System Control Interface (TI SCI) clock driver"
+ depends on CLK && TI_SCI_PROTOCOL && OF_CONTROL
+ help
+ This enables the clock driver support over TI System Control Interface
+ available on some new TI's SoCs. If you wish to use clock resources
+ managed by the TI System Controller, say Y here. Otherwise, say N.
diff --git a/drivers/clk/ti/Makefile b/drivers/clk/ti/Makefile
index dbd3430..9f56b47 100644
--- a/drivers/clk/ti/Makefile
+++ b/drivers/clk/ti/Makefile
@@ -10,3 +10,4 @@
obj-$(CONFIG_CLK_TI_DIVIDER) += clk-divider.o
obj-$(CONFIG_CLK_TI_GATE) += clk-gate.o
obj-$(CONFIG_CLK_TI_MUX) += clk-mux.o
+obj-$(CONFIG_CLK_TI_SCI) += clk-sci.o
diff --git a/drivers/clk/ti/clk-sci.c b/drivers/clk/ti/clk-sci.c
new file mode 100644
index 0000000..6f0fdaa
--- /dev/null
+++ b/drivers/clk/ti/clk-sci.c
@@ -0,0 +1,225 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Texas Instruments System Control Interface (TI SCI) clock driver
+ *
+ * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+ * Andreas Dannenberg <dannenberg@ti.com>
+ *
+ * Loosely based on Linux kernel sci-clk.c...
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <clk-uclass.h>
+#include <log.h>
+#include <malloc.h>
+#include <dm/device_compat.h>
+#include <linux/err.h>
+#include <linux/soc/ti/ti_sci_protocol.h>
+#include <k3-avs.h>
+
+/**
+ * struct ti_sci_clk_data - clock controller information structure
+ * @sci: TI SCI handle used for communication with system controller
+ */
+struct ti_sci_clk_data {
+ const struct ti_sci_handle *sci;
+};
+
+static int ti_sci_clk_probe(struct udevice *dev)
+{
+ struct ti_sci_clk_data *data = dev_get_priv(dev);
+
+ debug("%s(dev=%p)\n", __func__, dev);
+
+ if (!data)
+ return -ENOMEM;
+
+ /* Store handle for communication with the system controller */
+ data->sci = ti_sci_get_handle(dev);
+ if (IS_ERR(data->sci))
+ return PTR_ERR(data->sci);
+
+ return 0;
+}
+
+static int ti_sci_clk_of_xlate(struct clk *clk,
+ struct ofnode_phandle_args *args)
+{
+ debug("%s(clk=%p, args_count=%d)\n", __func__, clk, args->args_count);
+
+ if (args->args_count != 2) {
+ debug("Invalid args_count: %d\n", args->args_count);
+ return -EINVAL;
+ }
+
+ /*
+ * On TI SCI-based devices, the clock provider id field is used as a
+ * device ID, and the data field is used as the associated sub-ID.
+ */
+ clk->id = args->args[0];
+ clk->data = args->args[1];
+
+ return 0;
+}
+
+static int ti_sci_clk_request(struct clk *clk)
+{
+ debug("%s(clk=%p)\n", __func__, clk);
+ return 0;
+}
+
+static int ti_sci_clk_free(struct clk *clk)
+{
+ debug("%s(clk=%p)\n", __func__, clk);
+ return 0;
+}
+
+static ulong ti_sci_clk_get_rate(struct clk *clk)
+{
+ struct ti_sci_clk_data *data = dev_get_priv(clk->dev);
+ const struct ti_sci_handle *sci = data->sci;
+ const struct ti_sci_clk_ops *cops = &sci->ops.clk_ops;
+ u64 current_freq;
+ int ret;
+
+ debug("%s(clk=%p)\n", __func__, clk);
+
+ ret = cops->get_freq(sci, clk->id, clk->data, ¤t_freq);
+ if (ret) {
+ dev_err(clk->dev, "%s: get_freq failed (%d)\n", __func__, ret);
+ return ret;
+ }
+
+ debug("%s(current_freq=%llu)\n", __func__, current_freq);
+
+ return current_freq;
+}
+
+static ulong ti_sci_clk_set_rate(struct clk *clk, ulong rate)
+{
+ struct ti_sci_clk_data *data = dev_get_priv(clk->dev);
+ const struct ti_sci_handle *sci = data->sci;
+ const struct ti_sci_clk_ops *cops = &sci->ops.clk_ops;
+ int ret;
+
+ debug("%s(clk=%p, rate=%lu)\n", __func__, clk, rate);
+
+#ifdef CONFIG_K3_AVS0
+ k3_avs_notify_freq(clk->id, clk->data, rate);
+#endif
+
+ ret = cops->set_freq(sci, clk->id, clk->data, 0, rate, ULONG_MAX);
+ if (ret)
+ dev_err(clk->dev, "%s: set_freq failed (%d)\n", __func__, ret);
+
+ return ret;
+}
+
+static int ti_sci_clk_set_parent(struct clk *clk, struct clk *parent)
+{
+ struct ti_sci_clk_data *data = dev_get_priv(clk->dev);
+ const struct ti_sci_handle *sci = data->sci;
+ const struct ti_sci_clk_ops *cops = &sci->ops.clk_ops;
+ u8 num_parents;
+ u8 parent_cid;
+ int ret;
+
+ debug("%s(clk=%p, parent=%p)\n", __func__, clk, parent);
+
+ /* Make sure the clock parent is valid for a given device ID */
+ if (clk->id != parent->id)
+ return -EINVAL;
+
+ /* Make sure clock has parents that can be set */
+ ret = cops->get_num_parents(sci, clk->id, clk->data, &num_parents);
+ if (ret) {
+ dev_err(clk->dev, "%s: get_num_parents failed (%d)\n",
+ __func__, ret);
+ return ret;
+ }
+ if (num_parents < 2) {
+ dev_err(clk->dev, "%s: clock has no settable parents!\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ /* Make sure parent clock ID is valid */
+ parent_cid = parent->data - clk->data - 1;
+ if (parent_cid >= num_parents) {
+ dev_err(clk->dev, "%s: invalid parent clock!\n", __func__);
+ return -EINVAL;
+ }
+
+ /* Ready to proceed to configure the new clock parent */
+ ret = cops->set_parent(sci, clk->id, clk->data, parent->data);
+ if (ret)
+ dev_err(clk->dev, "%s: set_parent failed (%d)\n", __func__,
+ ret);
+
+ return ret;
+}
+
+static int ti_sci_clk_enable(struct clk *clk)
+{
+ struct ti_sci_clk_data *data = dev_get_priv(clk->dev);
+ const struct ti_sci_handle *sci = data->sci;
+ const struct ti_sci_clk_ops *cops = &sci->ops.clk_ops;
+ int ret;
+
+ debug("%s(clk=%p)\n", __func__, clk);
+
+ /*
+ * Allow the System Controller to automatically manage the state of
+ * this clock. If the device is enabled, then the clock is enabled.
+ */
+ ret = cops->put_clock(sci, clk->id, clk->data);
+ if (ret)
+ dev_err(clk->dev, "%s: put_clock failed (%d)\n", __func__, ret);
+
+ return ret;
+}
+
+static int ti_sci_clk_disable(struct clk *clk)
+{
+ struct ti_sci_clk_data *data = dev_get_priv(clk->dev);
+ const struct ti_sci_handle *sci = data->sci;
+ const struct ti_sci_clk_ops *cops = &sci->ops.clk_ops;
+ int ret;
+
+ debug("%s(clk=%p)\n", __func__, clk);
+
+ /* Unconditionally disable clock, regardless of state of the device */
+ ret = cops->idle_clock(sci, clk->id, clk->data);
+ if (ret)
+ dev_err(clk->dev, "%s: idle_clock failed (%d)\n", __func__,
+ ret);
+
+ return ret;
+}
+
+static const struct udevice_id ti_sci_clk_of_match[] = {
+ { .compatible = "ti,k2g-sci-clk" },
+ { /* sentinel */ },
+};
+
+static struct clk_ops ti_sci_clk_ops = {
+ .of_xlate = ti_sci_clk_of_xlate,
+ .request = ti_sci_clk_request,
+ .rfree = ti_sci_clk_free,
+ .get_rate = ti_sci_clk_get_rate,
+ .set_rate = ti_sci_clk_set_rate,
+ .set_parent = ti_sci_clk_set_parent,
+ .enable = ti_sci_clk_enable,
+ .disable = ti_sci_clk_disable,
+};
+
+U_BOOT_DRIVER(ti_sci_clk) = {
+ .name = "ti-sci-clk",
+ .id = UCLASS_CLK,
+ .of_match = ti_sci_clk_of_match,
+ .probe = ti_sci_clk_probe,
+ .priv_auto = sizeof(struct ti_sci_clk_data),
+ .ops = &ti_sci_clk_ops,
+};