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Commit d387ff54 authored by Alexandre Belloni's avatar Alexandre Belloni Committed by Stephen Boyd
Browse files

clk: at91: add new DT lookup function 



Add a new DT lookup function to lookup for PMC clocks.

Note that the #ifndef AT91_PMC_MOSCS section will be removed once all the
platforms are converted.

Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent d425ad81

drivers/clk/at91/pmc.c

+34 −0
Original line number Diff line number Diff line
@@ -19,6 +19,8 @@ 


#include <asm/proc-fns.h>



#include <dt-bindings/clock/at91.h>



#include "pmc.h"



#define PMC_MAX_IDS 128
@@ -47,6 +49,38 @@ int of_at91_get_clk_range(struct device_node *np, const char *propname, 
}

EXPORT_SYMBOL_GPL(of_at91_get_clk_range);



struct clk_hw *of_clk_hw_pmc_get(struct of_phandle_args *clkspec, void *data)

{

	unsigned int type = clkspec->args[0];

	unsigned int idx = clkspec->args[1];

	struct pmc_data *pmc_data = data;



	switch (type) {

	case PMC_TYPE_CORE:

		if (idx < pmc_data->ncore)

			return pmc_data->chws[idx];

		break;

	case PMC_TYPE_SYSTEM:

		if (idx < pmc_data->nsystem)

			return pmc_data->shws[idx];

		break;

	case PMC_TYPE_PERIPHERAL:

		if (idx < pmc_data->nperiph)

			return pmc_data->phws[idx];

		break;

	case PMC_TYPE_GCK:

		if (idx < pmc_data->ngck)

			return pmc_data->ghws[idx];

		break;

	default:

		break;

	}



	pr_err("%s: invalid type (%u) or index (%u)\n", __func__, type, idx);



	return ERR_PTR(-EINVAL);

}



void pmc_data_free(struct pmc_data *pmc_data)

{

	kfree(pmc_data->chws);

include/dt-bindings/clock/at91.h

+15 −0
Original line number Diff line number Diff line
@@ -9,6 +9,20 @@ 
#ifndef _DT_BINDINGS_CLK_AT91_H

#define _DT_BINDINGS_CLK_AT91_H



#define PMC_TYPE_CORE		0

#define PMC_TYPE_SYSTEM		1

#define PMC_TYPE_PERIPHERAL	2

#define PMC_TYPE_GCK		3



#define PMC_SLOW		0

#define PMC_MCK			1

#define PMC_UTMI		2

#define PMC_MAIN		3

#define PMC_MCK2		4

#define PMC_I2S0_MUX		5

#define PMC_I2S1_MUX		6



#ifndef AT91_PMC_MOSCS

#define AT91_PMC_MOSCS		0		/* MOSCS Flag */

#define AT91_PMC_LOCKA		1		/* PLLA Lock */

#define AT91_PMC_LOCKB		2		/* PLLB Lock */
@@ -19,5 +33,6 @@ 
#define AT91_PMC_MOSCRCS	17		/* Main On-Chip RC */

#define AT91_PMC_CFDEV		18		/* Clock Failure Detector Event */

#define AT91_PMC_GCKRDY		24		/* Generated Clocks */

#endif



#endif