1 // SPDX-License-Identifier: GPL-2.0+ or BSD-3-Clause
2 /*
3 * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com>
4 * Copyright (C) 2021 Microchip
5 */
6
7 #include <drivers/clk.h>
8 #include <drivers/clk_dt.h>
9
10 #define SLOW_CLOCK_FREQ 32768
11
sckc_get_rate(struct clk * clk __unused,unsigned long parent_rate __unused)12 static unsigned long sckc_get_rate(struct clk *clk __unused,
13 unsigned long parent_rate __unused)
14 {
15 return SLOW_CLOCK_FREQ;
16 }
17
18 static const struct clk_ops sckc_clk_ops = {
19 .get_rate = sckc_get_rate,
20 };
21
sckc_pmc_setup(const void * fdt __unused,int offs,const void * data __unused)22 static TEE_Result sckc_pmc_setup(const void *fdt __unused, int offs,
23 const void *data __unused)
24 {
25 struct clk *clk = NULL;
26 TEE_Result res = TEE_ERROR_GENERIC;
27
28 clk = clk_alloc("slowck", &sckc_clk_ops, NULL, 0);
29 if (!clk)
30 return TEE_ERROR_OUT_OF_MEMORY;
31
32 res = clk_register(clk);
33 if (res) {
34 clk_free(clk);
35 return res;
36 }
37
38 return clk_dt_register_clk_provider(fdt, offs, clk_dt_get_simple_clk,
39 clk);
40 }
41
42 CLK_DT_DECLARE(at91_sckc, "atmel,sama5d4-sckc", sckc_pmc_setup);
43