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clk: ti: add support for clkctrl aliases 

hwmod core still depends on certain clocks being found by name, so we
need to add support for adding clkctrl clock aliases. This patch can
be reverted when no longer needed by hwmod core code.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
hifive-unleashed-5.1
Tero Kristo 2017-09-26 15:34:27 +03:00
parent ddfb183e2e
commit 5b385a45e0
1 changed files with 55 additions and 3 deletions
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58
drivers/clk/ti/clk.c
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@ -108,18 +108,70 @@ void __init ti_dt_clocks_register(struct ti_dt_clk oclks[])
struct device_node *node;
struct clk *clk;
struct of_phandle_args clkspec;
char buf[64];
char *ptr;
char *tags[2];
int i;
int num_args;
int ret;
static bool clkctrl_nodes_missing;
static bool has_clkctrl_data;
for (c = oclks; c->node_name != NULL; c++) {
node = of_find_node_by_name(NULL, c->node_name);
strcpy(buf, c->node_name);
ptr = buf;
for (i = 0; i < 2; i++)
tags[i] = NULL;
num_args = 0;
while (*ptr) {
if (*ptr == ':') {
if (num_args >= 2) {
pr_warn("Bad number of tags on %s\n",
c->node_name);
return;
}
tags[num_args++] = ptr + 1;
*ptr = 0;
}
ptr++;
}
if (num_args && clkctrl_nodes_missing)
continue;
node = of_find_node_by_name(NULL, buf);
if (num_args)
node = of_find_node_by_name(node, "clk");
clkspec.np = node;
clkspec.args_count = num_args;
for (i = 0; i < num_args; i++) {
ret = kstrtoint(tags[i], i ? 10 : 16, clkspec.args + i);
if (ret) {
pr_warn("Bad tag in %s at %d: %s\n",
c->node_name, i, tags[i]);
return;
}
}
clk = of_clk_get_from_provider(&clkspec);
if (!IS_ERR(clk)) {
c->lk.clk = clk;
clkdev_add(&c->lk);
} else {
pr_warn("failed to lookup clock node %s\n",
c->node_name);
if (num_args && !has_clkctrl_data) {
if (of_find_compatible_node(NULL, NULL,
"ti,clkctrl")) {
has_clkctrl_data = true;
} else {
clkctrl_nodes_missing = true;
pr_warn("missing clkctrl nodes, please update your dts.\n");
continue;
}
}
pr_warn("failed to lookup clock node %s, ret=%ld\n",
c->node_name, PTR_ERR(clk));
}
}
}