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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: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Alexandre Belloni 2018-10-16 16:21:47 +02:00 committed by Stephen Boyd
parent d425ad81ea
commit d387ff5427
2 changed files with 49 additions and 0 deletions
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34
drivers/clk/at91/pmc.c
View File

@ -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);

15
include/dt-bindings/clock/at91.h
View File

@ -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