// SPDX-License-Identifier: GPL-2.0
#include <linux/clk-provider.h>
#include <linux/mfd/syscon.h>
#include <linux/slab.h>
#include <dt-bindings/clock/at91.h>
#include "pmc.h"
static DEFINE_SPINLOCK(sam9rl_mck_lock);
static const struct clk_master_characteristics sam9rl_mck_characteristics = {
.output = { .min = 0 , .max = 94000000 },
.divisors = { 1 , 2 , 4 , 0 },
};
static u8 sam9rl_plla_out[] = { 0 , 2 };
static const struct clk_range sam9rl_plla_outputs[] = {
{ .min = 80000000 , .max = 200000000 },
{ .min = 190000000 , .max = 240000000 },
};
static const struct clk_pll_characteristics sam9rl_plla_characteristics = {
.input = { .min = 1000000 , .max = 32000000 },
.num_output = ARRAY_SIZE(sam9rl_plla_outputs),
.output = sam9rl_plla_outputs,
.out = sam9rl_plla_out,
};
static const struct {
char *n;
char *p;
u8 id;
} at91sam9rl_systemck[] = {
{ .n = "pck0" , .p = "prog0" , .id = 8 },
{ .n = "pck1" , .p = "prog1" , .id = 9 },
};
static const struct {
char *n;
u8 id;
} at91sam9rl_periphck[] = {
{ .n = "pioA_clk" , .id = 2 , },
{ .n = "pioB_clk" , .id = 3 , },
{ .n = "pioC_clk" , .id = 4 , },
{ .n = "pioD_clk" , .id = 5 , },
{ .n = "usart0_clk" , .id = 6 , },
{ .n = "usart1_clk" , .id = 7 , },
{ .n = "usart2_clk" , .id = 8 , },
{ .n = "usart3_clk" , .id = 9 , },
{ .n = "mci0_clk" , .id = 10 , },
{ .n = "twi0_clk" , .id = 11 , },
{ .n = "twi1_clk" , .id = 12 , },
{ .n = "spi0_clk" , .id = 13 , },
{ .n = "ssc0_clk" , .id = 14 , },
{ .n = "ssc1_clk" , .id = 15 , },
{ .n = "tc0_clk" , .id = 16 , },
{ .n = "tc1_clk" , .id = 17 , },
{ .n = "tc2_clk" , .id = 18 , },
{ .n = "pwm_clk" , .id = 19 , },
{ .n = "adc_clk" , .id = 20 , },
{ .n = "dma0_clk" , .id = 21 , },
{ .n = "udphs_clk" , .id = 22 , },
{ .n = "lcd_clk" , .id = 23 , },
};
static void __init at91sam9rl_pmc_setup(struct device_node *np)
{
const char *slck_name, *mainxtal_name;
struct pmc_data *at91sam9rl_pmc;
const char *parent_names[6 ];
struct regmap *regmap;
struct clk_hw *hw;
int i;
i = of_property_match_string(np, "clock-names" , "slow_clk" );
if (i < 0 )
return ;
slck_name = of_clk_get_parent_name(np, i);
i = of_property_match_string(np, "clock-names" , "main_xtal" );
if (i < 0 )
return ;
mainxtal_name = of_clk_get_parent_name(np, i);
regmap = device_node_to_regmap(np);
if (IS_ERR(regmap))
return ;
at91sam9rl_pmc = pmc_data_allocate(PMC_PLLACK + 1 ,
nck(at91sam9rl_systemck),
nck(at91sam9rl_periphck), 0 , 2 );
if (!at91sam9rl_pmc)
return ;
hw = at91_clk_register_rm9200_main(regmap, "mainck" , mainxtal_name, NULL);
if (IS_ERR(hw))
goto err_free;
at91sam9rl_pmc->chws[PMC_MAIN] = hw;
hw = at91_clk_register_pll(regmap, "pllack" , "mainck" , 0 ,
&at91rm9200_pll_layout,
&sam9rl_plla_characteristics);
if (IS_ERR(hw))
goto err_free;
at91sam9rl_pmc->chws[PMC_PLLACK] = hw;
hw = at91_clk_register_utmi(regmap, NULL, "utmick" , "mainck" , NULL);
if (IS_ERR(hw))
goto err_free;
at91sam9rl_pmc->chws[PMC_UTMI] = hw;
parent_names[0 ] = slck_name;
parent_names[1 ] = "mainck" ;
parent_names[2 ] = "pllack" ;
parent_names[3 ] = "utmick" ;
hw = at91_clk_register_master_pres(regmap, "masterck_pres" , 4 ,
parent_names, NULL,
&at91rm9200_master_layout,
&sam9rl_mck_characteristics,
&sam9rl_mck_lock);
if (IS_ERR(hw))
goto err_free;
hw = at91_clk_register_master_div(regmap, "masterck_div" ,
"masterck_pres" , NULL,
&at91rm9200_master_layout,
&sam9rl_mck_characteristics,
&sam9rl_mck_lock, CLK_SET_RATE_GATE, 0 );
if (IS_ERR(hw))
goto err_free;
at91sam9rl_pmc->chws[PMC_MCK] = hw;
parent_names[0 ] = slck_name;
parent_names[1 ] = "mainck" ;
parent_names[2 ] = "pllack" ;
parent_names[3 ] = "utmick" ;
parent_names[4 ] = "masterck_div" ;
for (i = 0 ; i < 2 ; i++) {
char name[6 ];
snprintf(name, sizeof (name), "prog%d" , i);
hw = at91_clk_register_programmable(regmap, name,
parent_names, NULL, 5 , i,
&at91rm9200_programmable_layout,
NULL);
if (IS_ERR(hw))
goto err_free;
at91sam9rl_pmc->pchws[i] = hw;
}
for (i = 0 ; i < ARRAY_SIZE(at91sam9rl_systemck); i++) {
hw = at91_clk_register_system(regmap, at91sam9rl_systemck[i].n,
at91sam9rl_systemck[i].p, NULL,
at91sam9rl_systemck[i].id, 0 );
if (IS_ERR(hw))
goto err_free;
at91sam9rl_pmc->shws[at91sam9rl_systemck[i].id] = hw;
}
for (i = 0 ; i < ARRAY_SIZE(at91sam9rl_periphck); i++) {
hw = at91_clk_register_peripheral(regmap,
at91sam9rl_periphck[i].n,
"masterck_div" , NULL,
at91sam9rl_periphck[i].id);
if (IS_ERR(hw))
goto err_free;
at91sam9rl_pmc->phws[at91sam9rl_periphck[i].id] = hw;
}
of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91sam9rl_pmc);
return ;
err_free:
kfree(at91sam9rl_pmc);
}
CLK_OF_DECLARE(at91sam9rl_pmc, "atmel,at91sam9rl-pmc" , at91sam9rl_pmc_setup);
Messung V0.5 in Prozent C=97 H=96 G=96
¤ Dauer der Verarbeitung: 0.38 Sekunden
(vorverarbeitet am 2026-06-07)
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