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authorTony Lindgren <tony@atomide.com>2018-04-16 10:26:09 -0700
committerTony Lindgren <tony@atomide.com>2018-04-30 12:04:51 -0700
commit8b2830ba170356aed364ae145ca86120f510ec41 (patch)
tree1798c596e3e95485be7fa2ec9b7ea7317c31b1d4 /drivers/bus
parentc4bebea8c5fd7d94dc7ef60ac208a0668ba43796 (diff)
downloadlinux-8b2830ba170356aed364ae145ca86120f510ec41.tar.bz2
bus: ti-sysc: Make child clock alias handling more generic
In order to prepare supporting clkctrl optional clocks, we need to make the current child clock handling more generic so we can use the clock role names for the optional clocks in the following patch. Cc: Tero Kristo <t-kristo@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'drivers/bus')
-rw-r--r--drivers/bus/ti-sysc.c36
1 files changed, 23 insertions, 13 deletions
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 25c0e4ae9f1d..e12d1580f21d 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -811,29 +811,38 @@ static int sysc_init_syss_mask(struct sysc *ddata)
}
/*
- * Many child device drivers need to have fck available to get the clock
- * rate for device internal configuration.
+ * Many child device drivers need to have fck and opt clocks available
+ * to get the clock rate for device internal configuration etc.
*/
-static int sysc_child_add_fck(struct sysc *ddata,
- struct device *child)
+static int sysc_child_add_named_clock(struct sysc *ddata,
+ struct device *child,
+ const char *name)
{
- struct clk *fck;
+ struct clk *clk;
struct clk_lookup *l;
- const char *name = clock_names[SYSC_FCK];
+ int error = 0;
- if (IS_ERR_OR_NULL(ddata->clocks[SYSC_FCK]))
+ if (!name)
return 0;
- fck = clk_get(child, name);
- if (!IS_ERR(fck)) {
- clk_put(fck);
+ clk = clk_get(child, name);
+ if (!IS_ERR(clk)) {
+ clk_put(clk);
return -EEXIST;
}
- l = clkdev_create(ddata->clocks[SYSC_FCK], name, dev_name(child));
+ clk = clk_get(ddata->dev, name);
+ if (IS_ERR(clk))
+ return -ENODEV;
+
+ l = clkdev_create(clk, name, dev_name(child));
+ if (!l)
+ error = -ENOMEM;
- return l ? 0 : -ENODEV;
+ clk_put(clk);
+
+ return error;
}
static struct device_type sysc_device_type = {
@@ -983,7 +992,8 @@ static int sysc_notifier_call(struct notifier_block *nb,
switch (event) {
case BUS_NOTIFY_ADD_DEVICE:
- error = sysc_child_add_fck(ddata, dev);
+ error = sysc_child_add_named_clock(ddata, dev,
+ clock_names[SYSC_FCK]);
if (error && error != -EEXIST)
dev_warn(ddata->dev, "could not add %s fck: %i\n",
dev_name(dev), error);