From 51f661ef9a106e908097262ff5034a85ce15b122 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Fri, 4 Feb 2022 09:14:45 +0200 Subject: [PATCH] clk: ti: Add ti_find_clock_provider() to use clock-output-names Let's add ti_find_clock_provider() so we can use clock-output-names to name the clock provider instead of relying on non-standard devicetree node names. Signed-off-by: Tony Lindgren Link: https://lore.kernel.org/r/20220204071449.16762-5-tony@atomide.com Signed-off-by: Stephen Boyd --- drivers/clk/ti/clk.c | 43 +++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 41 insertions(+), 2 deletions(-) diff --git a/drivers/clk/ti/clk.c b/drivers/clk/ti/clk.c index a0ddf16..6fcbd80 100644 --- a/drivers/clk/ti/clk.c +++ b/drivers/clk/ti/clk.c @@ -119,12 +119,51 @@ int ti_clk_setup_ll_ops(struct ti_clk_ll_ops *ops) return 0; } +/* + * Eventually we could standardize to using '_' for clk-*.c files to follow the + * TRM naming and leave out the tmp name here. + */ +static struct device_node *ti_find_clock_provider(struct device_node *from, + const char *name) +{ + struct device_node *np; + bool found = false; + const char *n; + char *tmp; + + tmp = kstrdup(name, GFP_KERNEL); + if (!tmp) + return NULL; + strreplace(tmp, '-', '_'); + + /* Node named "clock" with "clock-output-names" */ + for_each_of_allnodes_from(from, np) { + if (of_property_read_string_index(np, "clock-output-names", + 0, &n)) + continue; + + if (!strncmp(n, tmp, strlen(tmp))) { + found = true; + break; + } + } + of_node_put(from); + kfree(tmp); + + if (found) + return np; + + /* Fall back to using old node name base provider name */ + return of_find_node_by_name(from, name); +} + /** * ti_dt_clocks_register - register DT alias clocks during boot * @oclks: list of clocks to register * * Register alias or non-standard DT clock entries during boot. By - * default, DT clocks are found based on their node name. If any + * default, DT clocks are found based on their clock-output-names + * property, or the clock node name for legacy cases. If any * additional con-id / dev-id -> clock mapping is required, use this * function to list these. */ @@ -168,7 +207,7 @@ void __init ti_dt_clocks_register(struct ti_dt_clk oclks[]) if (num_args && clkctrl_nodes_missing) continue; - node = of_find_node_by_name(NULL, buf); + node = ti_find_clock_provider(NULL, buf); if (num_args && compat_mode) { parent = node; child = of_get_child_by_name(parent, "clock"); -- 2.7.4