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-rw-r--r--drivers/clk/zynqmp/clkc.c803
1 files changed, 803 insertions, 0 deletions
diff --git a/drivers/clk/zynqmp/clkc.c b/drivers/clk/zynqmp/clkc.c
new file mode 100644
index 000000000..5636ff1ce
--- /dev/null
+++ b/drivers/clk/zynqmp/clkc.c
@@ -0,0 +1,803 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Zynq UltraScale+ MPSoC clock controller
+ *
+ * Copyright (C) 2016-2019 Xilinx
+ *
+ * Based on drivers/clk/zynq/clkc.c
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+
+#include "clk-zynqmp.h"
+
+#define MAX_PARENT 100
+#define MAX_NODES 6
+#define MAX_NAME_LEN 50
+
+/* Flags for parents */
+#define PARENT_CLK_SELF 0
+#define PARENT_CLK_NODE1 1
+#define PARENT_CLK_NODE2 2
+#define PARENT_CLK_NODE3 3
+#define PARENT_CLK_NODE4 4
+#define PARENT_CLK_EXTERNAL 5
+
+#define END_OF_CLK_NAME "END_OF_CLK"
+#define END_OF_TOPOLOGY_NODE 1
+#define END_OF_PARENTS 1
+#define RESERVED_CLK_NAME ""
+
+#define CLK_GET_NAME_RESP_LEN 16
+#define CLK_GET_TOPOLOGY_RESP_WORDS 3
+#define CLK_GET_PARENTS_RESP_WORDS 3
+#define CLK_GET_ATTR_RESP_WORDS 1
+
+enum clk_type {
+ CLK_TYPE_OUTPUT,
+ CLK_TYPE_EXTERNAL,
+};
+
+/**
+ * struct clock_parent - Clock parent
+ * @name: Parent name
+ * @id: Parent clock ID
+ * @flag: Parent flags
+ */
+struct clock_parent {
+ char name[MAX_NAME_LEN];
+ int id;
+ u32 flag;
+};
+
+/**
+ * struct zynqmp_clock - Clock
+ * @clk_name: Clock name
+ * @valid: Validity flag of clock
+ * @type: Clock type (Output/External)
+ * @node: Clock topology nodes
+ * @num_nodes: Number of nodes present in topology
+ * @parent: Parent of clock
+ * @num_parents: Number of parents of clock
+ * @clk_id: Clock id
+ */
+struct zynqmp_clock {
+ char clk_name[MAX_NAME_LEN];
+ u32 valid;
+ enum clk_type type;
+ struct clock_topology node[MAX_NODES];
+ u32 num_nodes;
+ struct clock_parent parent[MAX_PARENT];
+ u32 num_parents;
+ u32 clk_id;
+};
+
+struct name_resp {
+ char name[CLK_GET_NAME_RESP_LEN];
+};
+
+struct topology_resp {
+#define CLK_TOPOLOGY_TYPE GENMASK(3, 0)
+#define CLK_TOPOLOGY_CUSTOM_TYPE_FLAGS GENMASK(7, 4)
+#define CLK_TOPOLOGY_FLAGS GENMASK(23, 8)
+#define CLK_TOPOLOGY_TYPE_FLAGS GENMASK(31, 24)
+ u32 topology[CLK_GET_TOPOLOGY_RESP_WORDS];
+};
+
+struct parents_resp {
+#define NA_PARENT 0xFFFFFFFF
+#define DUMMY_PARENT 0xFFFFFFFE
+#define CLK_PARENTS_ID GENMASK(15, 0)
+#define CLK_PARENTS_FLAGS GENMASK(31, 16)
+ u32 parents[CLK_GET_PARENTS_RESP_WORDS];
+};
+
+struct attr_resp {
+#define CLK_ATTR_VALID BIT(0)
+#define CLK_ATTR_TYPE BIT(2)
+#define CLK_ATTR_NODE_INDEX GENMASK(13, 0)
+#define CLK_ATTR_NODE_TYPE GENMASK(19, 14)
+#define CLK_ATTR_NODE_SUBCLASS GENMASK(25, 20)
+#define CLK_ATTR_NODE_CLASS GENMASK(31, 26)
+ u32 attr[CLK_GET_ATTR_RESP_WORDS];
+};
+
+static const char clk_type_postfix[][10] = {
+ [TYPE_INVALID] = "",
+ [TYPE_MUX] = "_mux",
+ [TYPE_GATE] = "",
+ [TYPE_DIV1] = "_div1",
+ [TYPE_DIV2] = "_div2",
+ [TYPE_FIXEDFACTOR] = "_ff",
+ [TYPE_PLL] = ""
+};
+
+static struct clk_hw *(* const clk_topology[]) (const char *name, u32 clk_id,
+ const char * const *parents,
+ u8 num_parents,
+ const struct clock_topology *nodes)
+ = {
+ [TYPE_INVALID] = NULL,
+ [TYPE_MUX] = zynqmp_clk_register_mux,
+ [TYPE_PLL] = zynqmp_clk_register_pll,
+ [TYPE_FIXEDFACTOR] = zynqmp_clk_register_fixed_factor,
+ [TYPE_DIV1] = zynqmp_clk_register_divider,
+ [TYPE_DIV2] = zynqmp_clk_register_divider,
+ [TYPE_GATE] = zynqmp_clk_register_gate
+};
+
+static struct zynqmp_clock *clock;
+static struct clk_hw_onecell_data *zynqmp_data;
+static unsigned int clock_max_idx;
+
+/**
+ * zynqmp_is_valid_clock() - Check whether clock is valid or not
+ * @clk_id: Clock index
+ *
+ * Return: 1 if clock is valid, 0 if clock is invalid else error code
+ */
+static inline int zynqmp_is_valid_clock(u32 clk_id)
+{
+ if (clk_id >= clock_max_idx)
+ return -ENODEV;
+
+ return clock[clk_id].valid;
+}
+
+/**
+ * zynqmp_get_clock_name() - Get name of clock from Clock index
+ * @clk_id: Clock index
+ * @clk_name: Name of clock
+ *
+ * Return: 0 on success else error code
+ */
+static int zynqmp_get_clock_name(u32 clk_id, char *clk_name)
+{
+ int ret;
+
+ ret = zynqmp_is_valid_clock(clk_id);
+ if (ret == 1) {
+ strscpy(clk_name, clock[clk_id].clk_name, MAX_NAME_LEN);
+ return 0;
+ }
+
+ return ret == 0 ? -EINVAL : ret;
+}
+
+/**
+ * zynqmp_get_clock_type() - Get type of clock
+ * @clk_id: Clock index
+ * @type: Clock type: CLK_TYPE_OUTPUT or CLK_TYPE_EXTERNAL
+ *
+ * Return: 0 on success else error code
+ */
+static int zynqmp_get_clock_type(u32 clk_id, u32 *type)
+{
+ int ret;
+
+ ret = zynqmp_is_valid_clock(clk_id);
+ if (ret == 1) {
+ *type = clock[clk_id].type;
+ return 0;
+ }
+
+ return ret == 0 ? -EINVAL : ret;
+}
+
+/**
+ * zynqmp_pm_clock_get_num_clocks() - Get number of clocks in system
+ * @nclocks: Number of clocks in system/board.
+ *
+ * Call firmware API to get number of clocks.
+ *
+ * Return: 0 on success else error code.
+ */
+static int zynqmp_pm_clock_get_num_clocks(u32 *nclocks)
+{
+ struct zynqmp_pm_query_data qdata = {0};
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+
+ qdata.qid = PM_QID_CLOCK_GET_NUM_CLOCKS;
+
+ ret = zynqmp_pm_query_data(qdata, ret_payload);
+ *nclocks = ret_payload[1];
+
+ return ret;
+}
+
+/**
+ * zynqmp_pm_clock_get_name() - Get the name of clock for given id
+ * @clock_id: ID of the clock to be queried
+ * @response: Name of the clock with the given id
+ *
+ * This function is used to get name of clock specified by given
+ * clock ID.
+ *
+ * Return: 0 on success else error+reason
+ */
+static int zynqmp_pm_clock_get_name(u32 clock_id,
+ struct name_resp *response)
+{
+ struct zynqmp_pm_query_data qdata = {0};
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+
+ qdata.qid = PM_QID_CLOCK_GET_NAME;
+ qdata.arg1 = clock_id;
+
+ ret = zynqmp_pm_query_data(qdata, ret_payload);
+ if (ret)
+ return ret;
+
+ memcpy(response, ret_payload, sizeof(*response));
+
+ return 0;
+}
+
+/**
+ * zynqmp_pm_clock_get_topology() - Get the topology of clock for given id
+ * @clock_id: ID of the clock to be queried
+ * @index: Node index of clock topology
+ * @response: Buffer used for the topology response
+ *
+ * This function is used to get topology information for the clock
+ * specified by given clock ID.
+ *
+ * This API will return 3 node of topology with a single response. To get
+ * other nodes, master should call same API in loop with new
+ * index till error is returned. E.g First call should have
+ * index 0 which will return nodes 0,1 and 2. Next call, index
+ * should be 3 which will return nodes 3,4 and 5 and so on.
+ *
+ * Return: 0 on success else error+reason
+ */
+static int zynqmp_pm_clock_get_topology(u32 clock_id, u32 index,
+ struct topology_resp *response)
+{
+ struct zynqmp_pm_query_data qdata = {0};
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+
+ qdata.qid = PM_QID_CLOCK_GET_TOPOLOGY;
+ qdata.arg1 = clock_id;
+ qdata.arg2 = index;
+
+ ret = zynqmp_pm_query_data(qdata, ret_payload);
+ memcpy(response, &ret_payload[1], sizeof(*response));
+
+ return ret;
+}
+
+unsigned long zynqmp_clk_map_common_ccf_flags(const u32 zynqmp_flag)
+{
+ unsigned long ccf_flag = 0;
+
+ if (zynqmp_flag & ZYNQMP_CLK_SET_RATE_GATE)
+ ccf_flag |= CLK_SET_RATE_GATE;
+ if (zynqmp_flag & ZYNQMP_CLK_SET_PARENT_GATE)
+ ccf_flag |= CLK_SET_PARENT_GATE;
+ if (zynqmp_flag & ZYNQMP_CLK_SET_RATE_PARENT)
+ ccf_flag |= CLK_SET_RATE_PARENT;
+ if (zynqmp_flag & ZYNQMP_CLK_IGNORE_UNUSED)
+ ccf_flag |= CLK_IGNORE_UNUSED;
+ if (zynqmp_flag & ZYNQMP_CLK_SET_RATE_NO_REPARENT)
+ ccf_flag |= CLK_SET_RATE_NO_REPARENT;
+ if (zynqmp_flag & ZYNQMP_CLK_IS_CRITICAL)
+ ccf_flag |= CLK_IS_CRITICAL;
+
+ return ccf_flag;
+}
+
+/**
+ * zynqmp_clk_register_fixed_factor() - Register fixed factor with the
+ * clock framework
+ * @name: Name of this clock
+ * @clk_id: Clock ID
+ * @parents: Name of this clock's parents
+ * @num_parents: Number of parents
+ * @nodes: Clock topology node
+ *
+ * Return: clock hardware to the registered clock
+ */
+struct clk_hw *zynqmp_clk_register_fixed_factor(const char *name, u32 clk_id,
+ const char * const *parents,
+ u8 num_parents,
+ const struct clock_topology *nodes)
+{
+ u32 mult, div;
+ struct clk_hw *hw;
+ struct zynqmp_pm_query_data qdata = {0};
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+ unsigned long flag;
+
+ qdata.qid = PM_QID_CLOCK_GET_FIXEDFACTOR_PARAMS;
+ qdata.arg1 = clk_id;
+
+ ret = zynqmp_pm_query_data(qdata, ret_payload);
+ if (ret)
+ return ERR_PTR(ret);
+
+ mult = ret_payload[1];
+ div = ret_payload[2];
+
+ flag = zynqmp_clk_map_common_ccf_flags(nodes->flag);
+
+ hw = clk_hw_register_fixed_factor(NULL, name,
+ parents[0],
+ flag, mult,
+ div);
+
+ return hw;
+}
+
+/**
+ * zynqmp_pm_clock_get_parents() - Get the first 3 parents of clock for given id
+ * @clock_id: Clock ID
+ * @index: Parent index
+ * @response: Parents of the given clock
+ *
+ * This function is used to get 3 parents for the clock specified by
+ * given clock ID.
+ *
+ * This API will return 3 parents with a single response. To get
+ * other parents, master should call same API in loop with new
+ * parent index till error is returned. E.g First call should have
+ * index 0 which will return parents 0,1 and 2. Next call, index
+ * should be 3 which will return parent 3,4 and 5 and so on.
+ *
+ * Return: 0 on success else error+reason
+ */
+static int zynqmp_pm_clock_get_parents(u32 clock_id, u32 index,
+ struct parents_resp *response)
+{
+ struct zynqmp_pm_query_data qdata = {0};
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+
+ qdata.qid = PM_QID_CLOCK_GET_PARENTS;
+ qdata.arg1 = clock_id;
+ qdata.arg2 = index;
+
+ ret = zynqmp_pm_query_data(qdata, ret_payload);
+ memcpy(response, &ret_payload[1], sizeof(*response));
+
+ return ret;
+}
+
+/**
+ * zynqmp_pm_clock_get_attributes() - Get the attributes of clock for given id
+ * @clock_id: Clock ID
+ * @response: Clock attributes response
+ *
+ * This function is used to get clock's attributes(e.g. valid, clock type, etc).
+ *
+ * Return: 0 on success else error+reason
+ */
+static int zynqmp_pm_clock_get_attributes(u32 clock_id,
+ struct attr_resp *response)
+{
+ struct zynqmp_pm_query_data qdata = {0};
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+
+ qdata.qid = PM_QID_CLOCK_GET_ATTRIBUTES;
+ qdata.arg1 = clock_id;
+
+ ret = zynqmp_pm_query_data(qdata, ret_payload);
+ memcpy(response, &ret_payload[1], sizeof(*response));
+
+ return ret;
+}
+
+/**
+ * __zynqmp_clock_get_topology() - Get topology data of clock from firmware
+ * response data
+ * @topology: Clock topology
+ * @response: Clock topology data received from firmware
+ * @nnodes: Number of nodes
+ *
+ * Return: 0 on success else error+reason
+ */
+static int __zynqmp_clock_get_topology(struct clock_topology *topology,
+ struct topology_resp *response,
+ u32 *nnodes)
+{
+ int i;
+ u32 type;
+
+ for (i = 0; i < ARRAY_SIZE(response->topology); i++) {
+ type = FIELD_GET(CLK_TOPOLOGY_TYPE, response->topology[i]);
+ if (type == TYPE_INVALID)
+ return END_OF_TOPOLOGY_NODE;
+ topology[*nnodes].type = type;
+ topology[*nnodes].flag = FIELD_GET(CLK_TOPOLOGY_FLAGS,
+ response->topology[i]);
+ topology[*nnodes].type_flag =
+ FIELD_GET(CLK_TOPOLOGY_TYPE_FLAGS,
+ response->topology[i]);
+ topology[*nnodes].custom_type_flag =
+ FIELD_GET(CLK_TOPOLOGY_CUSTOM_TYPE_FLAGS,
+ response->topology[i]);
+ (*nnodes)++;
+ }
+
+ return 0;
+}
+
+/**
+ * zynqmp_clock_get_topology() - Get topology of clock from firmware using
+ * PM_API
+ * @clk_id: Clock index
+ * @topology: Clock topology
+ * @num_nodes: Number of nodes
+ *
+ * Return: 0 on success else error+reason
+ */
+static int zynqmp_clock_get_topology(u32 clk_id,
+ struct clock_topology *topology,
+ u32 *num_nodes)
+{
+ int j, ret;
+ struct topology_resp response = { };
+
+ *num_nodes = 0;
+ for (j = 0; j <= MAX_NODES; j += ARRAY_SIZE(response.topology)) {
+ ret = zynqmp_pm_clock_get_topology(clock[clk_id].clk_id, j,
+ &response);
+ if (ret)
+ return ret;
+ ret = __zynqmp_clock_get_topology(topology, &response,
+ num_nodes);
+ if (ret == END_OF_TOPOLOGY_NODE)
+ return 0;
+ }
+
+ return 0;
+}
+
+/**
+ * __zynqmp_clock_get_parents() - Get parents info of clock from firmware
+ * response data
+ * @parents: Clock parents
+ * @response: Clock parents data received from firmware
+ * @nparent: Number of parent
+ *
+ * Return: 0 on success else error+reason
+ */
+static int __zynqmp_clock_get_parents(struct clock_parent *parents,
+ struct parents_resp *response,
+ u32 *nparent)
+{
+ int i;
+ struct clock_parent *parent;
+
+ for (i = 0; i < ARRAY_SIZE(response->parents); i++) {
+ if (response->parents[i] == NA_PARENT)
+ return END_OF_PARENTS;
+
+ parent = &parents[i];
+ parent->id = FIELD_GET(CLK_PARENTS_ID, response->parents[i]);
+ if (response->parents[i] == DUMMY_PARENT) {
+ strcpy(parent->name, "dummy_name");
+ parent->flag = 0;
+ } else {
+ parent->flag = FIELD_GET(CLK_PARENTS_FLAGS,
+ response->parents[i]);
+ if (zynqmp_get_clock_name(parent->id, parent->name))
+ continue;
+ }
+ *nparent += 1;
+ }
+
+ return 0;
+}
+
+/**
+ * zynqmp_clock_get_parents() - Get parents info from firmware using PM_API
+ * @clk_id: Clock index
+ * @parents: Clock parents
+ * @num_parents: Total number of parents
+ *
+ * Return: 0 on success else error+reason
+ */
+static int zynqmp_clock_get_parents(u32 clk_id, struct clock_parent *parents,
+ u32 *num_parents)
+{
+ int j = 0, ret;
+ struct parents_resp response = { };
+
+ *num_parents = 0;
+ do {
+ /* Get parents from firmware */
+ ret = zynqmp_pm_clock_get_parents(clock[clk_id].clk_id, j,
+ &response);
+ if (ret)
+ return ret;
+
+ ret = __zynqmp_clock_get_parents(&parents[j], &response,
+ num_parents);
+ if (ret == END_OF_PARENTS)
+ return 0;
+ j += ARRAY_SIZE(response.parents);
+ } while (*num_parents <= MAX_PARENT);
+
+ return 0;
+}
+
+/**
+ * zynqmp_get_parent_list() - Create list of parents name
+ * @np: Device node
+ * @clk_id: Clock index
+ * @parent_list: List of parent's name
+ * @num_parents: Total number of parents
+ *
+ * Return: 0 on success else error+reason
+ */
+static int zynqmp_get_parent_list(struct device_node *np, u32 clk_id,
+ const char **parent_list, u32 *num_parents)
+{
+ int i = 0, ret;
+ u32 total_parents = clock[clk_id].num_parents;
+ struct clock_topology *clk_nodes;
+ struct clock_parent *parents;
+
+ clk_nodes = clock[clk_id].node;
+ parents = clock[clk_id].parent;
+
+ for (i = 0; i < total_parents; i++) {
+ if (!parents[i].flag) {
+ parent_list[i] = parents[i].name;
+ } else if (parents[i].flag == PARENT_CLK_EXTERNAL) {
+ ret = of_property_match_string(np, "clock-names",
+ parents[i].name);
+ if (ret < 0)
+ strcpy(parents[i].name, "dummy_name");
+ parent_list[i] = parents[i].name;
+ } else {
+ strcat(parents[i].name,
+ clk_type_postfix[clk_nodes[parents[i].flag - 1].
+ type]);
+ parent_list[i] = parents[i].name;
+ }
+ }
+
+ *num_parents = total_parents;
+ return 0;
+}
+
+/**
+ * zynqmp_register_clk_topology() - Register clock topology
+ * @clk_id: Clock index
+ * @clk_name: Clock Name
+ * @num_parents: Total number of parents
+ * @parent_names: List of parents name
+ *
+ * Return: Returns either clock hardware or error+reason
+ */
+static struct clk_hw *zynqmp_register_clk_topology(int clk_id, char *clk_name,
+ int num_parents,
+ const char **parent_names)
+{
+ int j;
+ u32 num_nodes, clk_dev_id;
+ char *clk_out[MAX_NODES];
+ struct clock_topology *nodes;
+ struct clk_hw *hw = NULL;
+
+ nodes = clock[clk_id].node;
+ num_nodes = clock[clk_id].num_nodes;
+ clk_dev_id = clock[clk_id].clk_id;
+
+ for (j = 0; j < num_nodes; j++) {
+ /*
+ * Clock name received from firmware is output clock name.
+ * Intermediate clock names are postfixed with type of clock.
+ */
+ if (j != (num_nodes - 1)) {
+ clk_out[j] = kasprintf(GFP_KERNEL, "%s%s", clk_name,
+ clk_type_postfix[nodes[j].type]);
+ } else {
+ clk_out[j] = kasprintf(GFP_KERNEL, "%s", clk_name);
+ }
+
+ if (!clk_topology[nodes[j].type])
+ continue;
+
+ hw = (*clk_topology[nodes[j].type])(clk_out[j], clk_dev_id,
+ parent_names,
+ num_parents,
+ &nodes[j]);
+ if (IS_ERR(hw))
+ pr_warn_once("%s() 0x%x: %s register fail with %ld\n",
+ __func__, clk_dev_id, clk_name,
+ PTR_ERR(hw));
+
+ parent_names[0] = clk_out[j];
+ }
+
+ for (j = 0; j < num_nodes; j++)
+ kfree(clk_out[j]);
+
+ return hw;
+}
+
+/**
+ * zynqmp_register_clocks() - Register clocks
+ * @np: Device node
+ *
+ * Return: 0 on success else error code
+ */
+static int zynqmp_register_clocks(struct device_node *np)
+{
+ int ret;
+ u32 i, total_parents = 0, type = 0;
+ const char *parent_names[MAX_PARENT];
+
+ for (i = 0; i < clock_max_idx; i++) {
+ char clk_name[MAX_NAME_LEN];
+
+ /* get clock name, continue to next clock if name not found */
+ if (zynqmp_get_clock_name(i, clk_name))
+ continue;
+
+ /* Check if clock is valid and output clock.
+ * Do not register invalid or external clock.
+ */
+ ret = zynqmp_get_clock_type(i, &type);
+ if (ret || type != CLK_TYPE_OUTPUT)
+ continue;
+
+ /* Get parents of clock*/
+ if (zynqmp_get_parent_list(np, i, parent_names,
+ &total_parents)) {
+ WARN_ONCE(1, "No parents found for %s\n",
+ clock[i].clk_name);
+ continue;
+ }
+
+ zynqmp_data->hws[i] =
+ zynqmp_register_clk_topology(i, clk_name,
+ total_parents,
+ parent_names);
+ }
+
+ for (i = 0; i < clock_max_idx; i++) {
+ if (IS_ERR(zynqmp_data->hws[i])) {
+ pr_err("Zynq Ultrascale+ MPSoC clk %s: register failed with %ld\n",
+ clock[i].clk_name, PTR_ERR(zynqmp_data->hws[i]));
+ WARN_ON(1);
+ }
+ }
+ return 0;
+}
+
+/**
+ * zynqmp_get_clock_info() - Get clock information from firmware using PM_API
+ */
+static void zynqmp_get_clock_info(void)
+{
+ int i, ret;
+ u32 type = 0;
+ u32 nodetype, subclass, class;
+ struct attr_resp attr;
+ struct name_resp name;
+
+ for (i = 0; i < clock_max_idx; i++) {
+ ret = zynqmp_pm_clock_get_attributes(i, &attr);
+ if (ret)
+ continue;
+
+ clock[i].valid = FIELD_GET(CLK_ATTR_VALID, attr.attr[0]);
+ /* skip query for Invalid clock */
+ ret = zynqmp_is_valid_clock(i);
+ if (ret != CLK_ATTR_VALID)
+ continue;
+
+ clock[i].type = FIELD_GET(CLK_ATTR_TYPE, attr.attr[0]) ?
+ CLK_TYPE_EXTERNAL : CLK_TYPE_OUTPUT;
+
+ nodetype = FIELD_GET(CLK_ATTR_NODE_TYPE, attr.attr[0]);
+ subclass = FIELD_GET(CLK_ATTR_NODE_SUBCLASS, attr.attr[0]);
+ class = FIELD_GET(CLK_ATTR_NODE_CLASS, attr.attr[0]);
+
+ clock[i].clk_id = FIELD_PREP(CLK_ATTR_NODE_CLASS, class) |
+ FIELD_PREP(CLK_ATTR_NODE_SUBCLASS, subclass) |
+ FIELD_PREP(CLK_ATTR_NODE_TYPE, nodetype) |
+ FIELD_PREP(CLK_ATTR_NODE_INDEX, i);
+
+ zynqmp_pm_clock_get_name(clock[i].clk_id, &name);
+
+ /*
+ * Terminate with NULL character in case name provided by firmware
+ * is longer and truncated due to size limit.
+ */
+ name.name[sizeof(name.name) - 1] = '\0';
+
+ if (!strcmp(name.name, RESERVED_CLK_NAME))
+ continue;
+ strscpy(clock[i].clk_name, name.name, MAX_NAME_LEN);
+ }
+
+ /* Get topology of all clock */
+ for (i = 0; i < clock_max_idx; i++) {
+ ret = zynqmp_get_clock_type(i, &type);
+ if (ret || type != CLK_TYPE_OUTPUT)
+ continue;
+
+ ret = zynqmp_clock_get_topology(i, clock[i].node,
+ &clock[i].num_nodes);
+ if (ret)
+ continue;
+
+ ret = zynqmp_clock_get_parents(i, clock[i].parent,
+ &clock[i].num_parents);
+ if (ret)
+ continue;
+ }
+}
+
+/**
+ * zynqmp_clk_setup() - Setup the clock framework and register clocks
+ * @np: Device node
+ *
+ * Return: 0 on success else error code
+ */
+static int zynqmp_clk_setup(struct device_node *np)
+{
+ int ret;
+
+ ret = zynqmp_pm_clock_get_num_clocks(&clock_max_idx);
+ if (ret)
+ return ret;
+
+ zynqmp_data = kzalloc(struct_size(zynqmp_data, hws, clock_max_idx),
+ GFP_KERNEL);
+ if (!zynqmp_data)
+ return -ENOMEM;
+
+ clock = kcalloc(clock_max_idx, sizeof(*clock), GFP_KERNEL);
+ if (!clock) {
+ kfree(zynqmp_data);
+ return -ENOMEM;
+ }
+
+ zynqmp_get_clock_info();
+ zynqmp_register_clocks(np);
+
+ zynqmp_data->num = clock_max_idx;
+ return of_clk_add_hw_provider(np, of_clk_hw_onecell_get, zynqmp_data);
+}
+
+static int zynqmp_clock_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct device *dev = &pdev->dev;
+
+ ret = zynqmp_clk_setup(dev->of_node);
+
+ return ret;
+}
+
+static const struct of_device_id zynqmp_clock_of_match[] = {
+ {.compatible = "xlnx,zynqmp-clk"},
+ {.compatible = "xlnx,versal-clk"},
+ {},
+};
+MODULE_DEVICE_TABLE(of, zynqmp_clock_of_match);
+
+static struct platform_driver zynqmp_clock_driver = {
+ .driver = {
+ .name = "zynqmp_clock",
+ .of_match_table = zynqmp_clock_of_match,
+ },
+ .probe = zynqmp_clock_probe,
+};
+module_platform_driver(zynqmp_clock_driver);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 07:01:22 +0000