clk: bcm281xx: initialize CCU structures statically
We know up front how many CCU's we'll support, so there's no need to
allocate their data structures dynamically. Define a macro
KONA_CCU_COMMON() to simplify the initialization of many of the
fields in a ccu_data structure. Pass the address of a statically
defined CCU structure to kona_dt_ccu_setup() rather than having that
function allocate one.
We also know at build time how many clocks a given CCU will provide,
though the number of of them for each CCU is different. Record the
number of clocks we need in the CCU's clk_onecell_data struct
(which is used when we register the CCU with the common clock code
as a clock provider). Rename that struct field "clk_data" (because
"data" alone gets a little confusing).
Use the known clock count to move the allocation of each CCU's
clocks array into ccu_clks_setup() rather than having each CCU's
setup callback function do it.
(The real motivation behind all of this is that we'll be doing some
static initialization of some additional CCU-specific data soon.)
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
diff --git a/drivers/clk/bcm/clk-kona-setup.c b/drivers/clk/bcm/clk-kona-setup.c
index 9e7a9c1..4d1ca53 100644
--- a/drivers/clk/bcm/clk-kona-setup.c
+++ b/drivers/clk/bcm/clk-kona-setup.c
@@ -675,50 +675,49 @@
{
u32 i;
- for (i = 0; i < ccu->data.clk_num; i++)
- kona_clk_teardown(ccu->data.clks[i]);
- kfree(ccu->data.clks);
+ for (i = 0; i < ccu->clk_data.clk_num; i++)
+ kona_clk_teardown(ccu->clk_data.clks[i]);
+ kfree(ccu->clk_data.clks);
}
static void kona_ccu_teardown(struct ccu_data *ccu)
{
- if (!ccu)
- return;
-
+ kfree(ccu->clk_data.clks);
+ ccu->clk_data.clks = NULL;
if (!ccu->base)
- goto done;
+ return;
of_clk_del_provider(ccu->node); /* safe if never added */
ccu_clks_teardown(ccu);
list_del(&ccu->links);
of_node_put(ccu->node);
+ ccu->node = NULL;
iounmap(ccu->base);
-done:
- kfree(ccu->name);
- kfree(ccu);
+ ccu->base = NULL;
}
/*
* Set up a CCU. Call the provided ccu_clks_setup callback to
* initialize the array of clocks provided by the CCU.
*/
-void __init kona_dt_ccu_setup(struct device_node *node,
+void __init kona_dt_ccu_setup(struct ccu_data *ccu,
+ struct device_node *node,
int (*ccu_clks_setup)(struct ccu_data *))
{
- struct ccu_data *ccu;
struct resource res = { 0 };
resource_size_t range;
int ret;
- ccu = kzalloc(sizeof(*ccu), GFP_KERNEL);
- if (ccu)
- ccu->name = kstrdup(node->name, GFP_KERNEL);
- if (!ccu || !ccu->name) {
- pr_err("%s: unable to allocate CCU struct for %s\n",
- __func__, node->name);
- kfree(ccu);
+ if (ccu->clk_data.clk_num) {
+ size_t size;
- return;
+ size = ccu->clk_data.clk_num * sizeof(*ccu->clk_data.clks);
+ ccu->clk_data.clks = kzalloc(size, GFP_KERNEL);
+ if (!ccu->clk_data.clks) {
+ pr_err("%s: unable to allocate %u clocks for %s\n",
+ __func__, ccu->clk_data.clk_num, node->name);
+ return;
+ }
}
ret = of_address_to_resource(node, 0, &res);
@@ -742,18 +741,14 @@
node->name);
goto out_err;
}
-
- spin_lock_init(&ccu->lock);
- INIT_LIST_HEAD(&ccu->links);
ccu->node = of_node_get(node);
-
list_add_tail(&ccu->links, &ccu_list);
- /* Set up clocks array (in ccu->data) */
+ /* Set up clocks array (in ccu->clk_data) */
if (ccu_clks_setup(ccu))
goto out_err;
- ret = of_clk_add_provider(node, of_clk_src_onecell_get, &ccu->data);
+ ret = of_clk_add_provider(node, of_clk_src_onecell_get, &ccu->clk_data);
if (ret) {
pr_err("%s: error adding ccu %s as provider (%d)\n", __func__,
node->name, ret);