Commit 6451af02 authored by Alban Bedel's avatar Alban Bedel Committed by Ralf Baechle
Browse files

MIPS: ath79: Add OF support to the clocks 



Allow using the SoC clocks in the device tree.

Signed-off-by: default avatarAlban Bedel <albeu@free.fr>
Cc: linux-mips@linux-mips.org
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 44fad332

arch/mips/ath79/clock.c

+44 −19
Original line number Diff line number Diff line
@@ -29,7 +29,14 @@ 
#define AR724X_BASE_FREQ	5000000

#define AR913X_BASE_FREQ	5000000



static void __init ath79_add_sys_clkdev(const char *id, unsigned long rate)

static struct clk *clks[3];

static struct clk_onecell_data clk_data = {

	.clks = clks,

	.clk_num = ARRAY_SIZE(clks),

};



static struct clk *__init ath79_add_sys_clkdev(

	const char *id, unsigned long rate)

{

	struct clk *clk;

	int err;
@@ -41,6 +48,8 @@ static void __init ath79_add_sys_clkdev(const char *id, unsigned long rate) 
	err = clk_register_clkdev(clk, id, NULL);

	if (err)

		panic("unable to register %s clock device", id);



	return clk;

}



static void __init ar71xx_clocks_init(void)
@@ -70,9 +79,9 @@ static void __init ar71xx_clocks_init(void) 
	ahb_rate = cpu_rate / div;



	ath79_add_sys_clkdev("ref", ref_rate);

	ath79_add_sys_clkdev("cpu", cpu_rate);

	ath79_add_sys_clkdev("ddr", ddr_rate);

	ath79_add_sys_clkdev("ahb", ahb_rate);

	clks[0] = ath79_add_sys_clkdev("cpu", cpu_rate);

	clks[1] = ath79_add_sys_clkdev("ddr", ddr_rate);

	clks[2] = ath79_add_sys_clkdev("ahb", ahb_rate);



	clk_add_alias("wdt", NULL, "ahb", NULL);

	clk_add_alias("uart", NULL, "ahb", NULL);
@@ -106,9 +115,9 @@ static void __init ar724x_clocks_init(void) 
	ahb_rate = cpu_rate / div;



	ath79_add_sys_clkdev("ref", ref_rate);

	ath79_add_sys_clkdev("cpu", cpu_rate);

	ath79_add_sys_clkdev("ddr", ddr_rate);

	ath79_add_sys_clkdev("ahb", ahb_rate);

	clks[0] = ath79_add_sys_clkdev("cpu", cpu_rate);

	clks[1] = ath79_add_sys_clkdev("ddr", ddr_rate);

	clks[2] = ath79_add_sys_clkdev("ahb", ahb_rate);



	clk_add_alias("wdt", NULL, "ahb", NULL);

	clk_add_alias("uart", NULL, "ahb", NULL);
@@ -139,9 +148,9 @@ static void __init ar913x_clocks_init(void) 
	ahb_rate = cpu_rate / div;



	ath79_add_sys_clkdev("ref", ref_rate);

	ath79_add_sys_clkdev("cpu", cpu_rate);

	ath79_add_sys_clkdev("ddr", ddr_rate);

	ath79_add_sys_clkdev("ahb", ahb_rate);

	clks[0] = ath79_add_sys_clkdev("cpu", cpu_rate);

	clks[1] = ath79_add_sys_clkdev("ddr", ddr_rate);

	clks[2] = ath79_add_sys_clkdev("ahb", ahb_rate);



	clk_add_alias("wdt", NULL, "ahb", NULL);

	clk_add_alias("uart", NULL, "ahb", NULL);
@@ -201,9 +210,9 @@ static void __init ar933x_clocks_init(void) 
	}



	ath79_add_sys_clkdev("ref", ref_rate);

	ath79_add_sys_clkdev("cpu", cpu_rate);

	ath79_add_sys_clkdev("ddr", ddr_rate);

	ath79_add_sys_clkdev("ahb", ahb_rate);

	clks[0] = ath79_add_sys_clkdev("cpu", cpu_rate);

	clks[1] = ath79_add_sys_clkdev("ddr", ddr_rate);

	clks[2] = ath79_add_sys_clkdev("ahb", ahb_rate);



	clk_add_alias("wdt", NULL, "ahb", NULL);

	clk_add_alias("uart", NULL, "ref", NULL);
@@ -335,9 +344,9 @@ static void __init ar934x_clocks_init(void) 
		ahb_rate = cpu_pll / (postdiv + 1);



	ath79_add_sys_clkdev("ref", ref_rate);

	ath79_add_sys_clkdev("cpu", cpu_rate);

	ath79_add_sys_clkdev("ddr", ddr_rate);

	ath79_add_sys_clkdev("ahb", ahb_rate);

	clks[0] = ath79_add_sys_clkdev("cpu", cpu_rate);

	clks[1] = ath79_add_sys_clkdev("ddr", ddr_rate);

	clks[2] = ath79_add_sys_clkdev("ahb", ahb_rate);



	clk_add_alias("wdt", NULL, "ref", NULL);

	clk_add_alias("uart", NULL, "ref", NULL);
@@ -422,9 +431,9 @@ static void __init qca955x_clocks_init(void) 
		ahb_rate = cpu_pll / (postdiv + 1);



	ath79_add_sys_clkdev("ref", ref_rate);

	ath79_add_sys_clkdev("cpu", cpu_rate);

	ath79_add_sys_clkdev("ddr", ddr_rate);

	ath79_add_sys_clkdev("ahb", ahb_rate);

	clks[0] = ath79_add_sys_clkdev("cpu", cpu_rate);

	clks[1] = ath79_add_sys_clkdev("ddr", ddr_rate);

	clks[2] = ath79_add_sys_clkdev("ahb", ahb_rate);



	clk_add_alias("wdt", NULL, "ref", NULL);

	clk_add_alias("uart", NULL, "ref", NULL);
@@ -446,6 +455,8 @@ void __init ath79_clocks_init(void) 
		qca955x_clocks_init();

	else

		BUG();



	of_clk_init(NULL);

}



unsigned long __init
@@ -463,3 +474,17 @@ ath79_get_sys_clk_rate(const char *id) 


	return rate;

}



#ifdef CONFIG_OF

static void __init ath79_clocks_init_dt(struct device_node *np)

{

	of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);

}



CLK_OF_DECLARE(ar7100, "qca,ar7100-pll", ath79_clocks_init_dt);

CLK_OF_DECLARE(ar7240, "qca,ar7240-pll", ath79_clocks_init_dt);

CLK_OF_DECLARE(ar9130, "qca,ar9130-pll", ath79_clocks_init_dt);

CLK_OF_DECLARE(ar9330, "qca,ar9330-pll", ath79_clocks_init_dt);

CLK_OF_DECLARE(ar9340, "qca,ar9340-pll", ath79_clocks_init_dt);

CLK_OF_DECLARE(ar9550, "qca,qca9550-pll", ath79_clocks_init_dt);

#endif