drivers/clk/at91/sam9x60.c - linux - Git at Google

 // 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(pmc_pll_lock);

 static const struct clk_master_characteristics mck_characteristics = {
 	.output = { .min = 140000000, .max = 200000000 },
 	.divisors = { 1, 2, 4, 3 },
 	.have_div3_pres = 1,
 };

 static const struct clk_master_layout sam9x60_master_layout = {
 	.mask = 0x373,
 	.pres_shift = 4,
 	.offset = 0x28,
 };

 static const struct clk_range plla_outputs[] = {
 	{ .min = 300000000, .max = 600000000 },
 };

 static const struct clk_pll_characteristics plla_characteristics = {
 	.input = { .min = 12000000, .max = 48000000 },
 	.num_output = ARRAY_SIZE(plla_outputs),
 	.output = plla_outputs,
 };

 static const struct clk_range upll_outputs[] = {
 	{ .min = 300000000, .max = 500000000 },
 };

 static const struct clk_pll_characteristics upll_characteristics = {
 	.input = { .min = 12000000, .max = 48000000 },
 	.num_output = ARRAY_SIZE(upll_outputs),
 	.output = upll_outputs,
 	.upll = true,
 };

 static const struct clk_programmable_layout sam9x60_programmable_layout = {
 	.pres_mask = 0xff,
 	.pres_shift = 8,
 	.css_mask = 0x1f,
 	.have_slck_mck = 0,
 };

 static const struct clk_pcr_layout sam9x60_pcr_layout = {
 	.offset = 0x88,
 	.cmd = BIT(31),
 	.gckcss_mask = GENMASK(12, 8),
 	.pid_mask = GENMASK(6, 0),
 };

 static const struct {
 	char *n;
 	char *p;
 	u8 id;
 } sam9x60_systemck[] = {
 	{ .n = "ddrck",  .p = "masterck", .id = 2 },
 	{ .n = "uhpck",  .p = "usbck",    .id = 6 },
 	{ .n = "pck0",   .p = "prog0",    .id = 8 },
 	{ .n = "pck1",   .p = "prog1",    .id = 9 },
 	{ .n = "qspick", .p = "masterck", .id = 19 },
 };

 static const struct {
 	char *n;
 	u8 id;
 } sam9x60_periphck[] = {
 	{ .n = "pioA_clk",   .id = 2, },
 	{ .n = "pioB_clk",   .id = 3, },
 	{ .n = "pioC_clk",   .id = 4, },
 	{ .n = "flex0_clk",  .id = 5, },
 	{ .n = "flex1_clk",  .id = 6, },
 	{ .n = "flex2_clk",  .id = 7, },
 	{ .n = "flex3_clk",  .id = 8, },
 	{ .n = "flex6_clk",  .id = 9, },
 	{ .n = "flex7_clk",  .id = 10, },
 	{ .n = "flex8_clk",  .id = 11, },
 	{ .n = "sdmmc0_clk", .id = 12, },
 	{ .n = "flex4_clk",  .id = 13, },
 	{ .n = "flex5_clk",  .id = 14, },
 	{ .n = "flex9_clk",  .id = 15, },
 	{ .n = "flex10_clk", .id = 16, },
 	{ .n = "tcb0_clk",   .id = 17, },
 	{ .n = "pwm_clk",    .id = 18, },
 	{ .n = "adc_clk",    .id = 19, },
 	{ .n = "dma0_clk",   .id = 20, },
 	{ .n = "matrix_clk", .id = 21, },
 	{ .n = "uhphs_clk",  .id = 22, },
 	{ .n = "udphs_clk",  .id = 23, },
 	{ .n = "macb0_clk",  .id = 24, },
 	{ .n = "lcd_clk",    .id = 25, },
 	{ .n = "sdmmc1_clk", .id = 26, },
 	{ .n = "macb1_clk",  .id = 27, },
 	{ .n = "ssc_clk",    .id = 28, },
 	{ .n = "can0_clk",   .id = 29, },
 	{ .n = "can1_clk",   .id = 30, },
 	{ .n = "flex11_clk", .id = 32, },
 	{ .n = "flex12_clk", .id = 33, },
 	{ .n = "i2s_clk",    .id = 34, },
 	{ .n = "qspi_clk",   .id = 35, },
 	{ .n = "gfx2d_clk",  .id = 36, },
 	{ .n = "pit64b_clk", .id = 37, },
 	{ .n = "trng_clk",   .id = 38, },
 	{ .n = "aes_clk",    .id = 39, },
 	{ .n = "tdes_clk",   .id = 40, },
 	{ .n = "sha_clk",    .id = 41, },
 	{ .n = "classd_clk", .id = 42, },
 	{ .n = "isi_clk",    .id = 43, },
 	{ .n = "pioD_clk",   .id = 44, },
 	{ .n = "tcb1_clk",   .id = 45, },
 	{ .n = "dbgu_clk",   .id = 47, },
 	{ .n = "mpddr_clk",  .id = 49, },
 };

 static const struct {
 	char *n;
 	u8 id;
 	struct clk_range r;
 	bool pll;
 } sam9x60_gck[] = {
 	{ .n = "flex0_gclk",  .id = 5, },
 	{ .n = "flex1_gclk",  .id = 6, },
 	{ .n = "flex2_gclk",  .id = 7, },
 	{ .n = "flex3_gclk",  .id = 8, },
 	{ .n = "flex6_gclk",  .id = 9, },
 	{ .n = "flex7_gclk",  .id = 10, },
 	{ .n = "flex8_gclk",  .id = 11, },
 	{ .n = "sdmmc0_gclk", .id = 12, .r = { .min = 0, .max = 105000000 }, },
 	{ .n = "flex4_gclk",  .id = 13, },
 	{ .n = "flex5_gclk",  .id = 14, },
 	{ .n = "flex9_gclk",  .id = 15, },
 	{ .n = "flex10_gclk", .id = 16, },
 	{ .n = "tcb0_gclk",   .id = 17, },
 	{ .n = "adc_gclk",    .id = 19, },
 	{ .n = "lcd_gclk",    .id = 25, .r = { .min = 0, .max = 140000000 }, },
 	{ .n = "sdmmc1_gclk", .id = 26, .r = { .min = 0, .max = 105000000 }, },
 	{ .n = "flex11_gclk", .id = 32, },
 	{ .n = "flex12_gclk", .id = 33, },
 	{ .n = "i2s_gclk",    .id = 34, .r = { .min = 0, .max = 105000000 },
 		.pll = true, },
 	{ .n = "pit64b_gclk", .id = 37, },
 	{ .n = "classd_gclk", .id = 42, .r = { .min = 0, .max = 100000000 },
 		.pll = true, },
 	{ .n = "tcb1_gclk",   .id = 45, },
 	{ .n = "dbgu_gclk",   .id = 47, },
 };

 static void __init sam9x60_pmc_setup(struct device_node *np)
 {
 	struct clk_range range = CLK_RANGE(0, 0);
 	const char *td_slck_name, *md_slck_name, *mainxtal_name;
 	struct pmc_data *sam9x60_pmc;
 	const char *parent_names[6];
 	struct regmap *regmap;
 	struct clk_hw *hw;
 	int i;
 	bool bypass;

 	i = of_property_match_string(np, "clock-names", "td_slck");
 	if (i < 0)
 		return;

 	td_slck_name = of_clk_get_parent_name(np, i);

 	i = of_property_match_string(np, "clock-names", "md_slck");
 	if (i < 0)
 		return;

 	md_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 = syscon_node_to_regmap(np);
 	if (IS_ERR(regmap))
 		return;

 	sam9x60_pmc = pmc_data_allocate(PMC_MAIN + 1,
 					nck(sam9x60_systemck),
 					nck(sam9x60_periphck),
 					nck(sam9x60_gck));
 	if (!sam9x60_pmc)
 		return;

 	hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 24000000,
 					   50000000);
 	if (IS_ERR(hw))
 		goto err_free;

 	bypass = of_property_read_bool(np, "atmel,osc-bypass");

 	hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name,
 					bypass);
 	if (IS_ERR(hw))
 		goto err_free;

 	parent_names[0] = "main_rc_osc";
 	parent_names[1] = "main_osc";
 	hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, 2);
 	if (IS_ERR(hw))
 		goto err_free;

 	sam9x60_pmc->chws[PMC_MAIN] = hw;

 	hw = sam9x60_clk_register_pll(regmap, &pmc_pll_lock, "pllack",
 				      "mainck", 0, &plla_characteristics);
 	if (IS_ERR(hw))
 		goto err_free;

 	hw = sam9x60_clk_register_pll(regmap, &pmc_pll_lock, "upllck",
 				      "main_osc", 1, &upll_characteristics);
 	if (IS_ERR(hw))
 		goto err_free;

 	sam9x60_pmc->chws[PMC_UTMI] = hw;

 	parent_names[0] = md_slck_name;
 	parent_names[1] = "mainck";
 	parent_names[2] = "pllack";
 	hw = at91_clk_register_master(regmap, "masterck", 3, parent_names,
 				      &sam9x60_master_layout,
 				      &mck_characteristics);
 	if (IS_ERR(hw))
 		goto err_free;

 	sam9x60_pmc->chws[PMC_MCK] = hw;

 	parent_names[0] = "pllack";
 	parent_names[1] = "upllck";
 	parent_names[2] = "mainck";
 	parent_names[3] = "mainck";
 	hw = sam9x60_clk_register_usb(regmap, "usbck", parent_names, 4);
 	if (IS_ERR(hw))
 		goto err_free;

 	parent_names[0] = md_slck_name;
 	parent_names[1] = td_slck_name;
 	parent_names[2] = "mainck";
 	parent_names[3] = "masterck";
 	parent_names[4] = "pllack";
 	parent_names[5] = "upllck";
 	for (i = 0; i < 8; i++) {
 		char name[6];

 		snprintf(name, sizeof(name), "prog%d", i);

 		hw = at91_clk_register_programmable(regmap, name,
 						    parent_names, 6, i,
 						    &sam9x60_programmable_layout);
 		if (IS_ERR(hw))
 			goto err_free;
 	}

 	for (i = 0; i < ARRAY_SIZE(sam9x60_systemck); i++) {
 		hw = at91_clk_register_system(regmap, sam9x60_systemck[i].n,
 					      sam9x60_systemck[i].p,
 					      sam9x60_systemck[i].id);
 		if (IS_ERR(hw))
 			goto err_free;

 		sam9x60_pmc->shws[sam9x60_systemck[i].id] = hw;
 	}

 	for (i = 0; i < ARRAY_SIZE(sam9x60_periphck); i++) {
 		hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 							 &sam9x60_pcr_layout,
 							 sam9x60_periphck[i].n,
 							 "masterck",
 							 sam9x60_periphck[i].id,
 							 &range);
 		if (IS_ERR(hw))
 			goto err_free;

 		sam9x60_pmc->phws[sam9x60_periphck[i].id] = hw;
 	}

 	for (i = 0; i < ARRAY_SIZE(sam9x60_gck); i++) {
 		hw = at91_clk_register_generated(regmap, &pmc_pcr_lock,
 						 &sam9x60_pcr_layout,
 						 sam9x60_gck[i].n,
 						 parent_names, 6,
 						 sam9x60_gck[i].id,
 						 sam9x60_gck[i].pll,
 						 &sam9x60_gck[i].r);
 		if (IS_ERR(hw))
 			goto err_free;

 		sam9x60_pmc->ghws[sam9x60_gck[i].id] = hw;
 	}

 	of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sam9x60_pmc);

 	return;

 err_free:
 	pmc_data_free(sam9x60_pmc);
 }
 /* Some clks are used for a clocksource */
 CLK_OF_DECLARE(sam9x60_pmc, "microchip,sam9x60-pmc", sam9x60_pmc_setup);
	// 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(pmc_pll_lock);

	static const struct clk_master_characteristics mck_characteristics = {
	.output = { .min = 140000000, .max = 200000000 },
	.divisors = { 1, 2, 4, 3 },
	.have_div3_pres = 1,
	};

	static const struct clk_master_layout sam9x60_master_layout = {
	.mask = 0x373,
	.pres_shift = 4,
	.offset = 0x28,
	};

	static const struct clk_range plla_outputs[] = {
	{ .min = 300000000, .max = 600000000 },
	};

	static const struct clk_pll_characteristics plla_characteristics = {
	.input = { .min = 12000000, .max = 48000000 },
	.num_output = ARRAY_SIZE(plla_outputs),
	.output = plla_outputs,
	};

	static const struct clk_range upll_outputs[] = {
	{ .min = 300000000, .max = 500000000 },
	};

	static const struct clk_pll_characteristics upll_characteristics = {
	.input = { .min = 12000000, .max = 48000000 },
	.num_output = ARRAY_SIZE(upll_outputs),
	.output = upll_outputs,
	.upll = true,
	};

	static const struct clk_programmable_layout sam9x60_programmable_layout = {
	.pres_mask = 0xff,
	.pres_shift = 8,
	.css_mask = 0x1f,
	.have_slck_mck = 0,
	};

	static const struct clk_pcr_layout sam9x60_pcr_layout = {
	.offset = 0x88,
	.cmd = BIT(31),
	.gckcss_mask = GENMASK(12, 8),
	.pid_mask = GENMASK(6, 0),
	};

	static const struct {
	char *n;
	char *p;
	u8 id;
	} sam9x60_systemck[] = {
	{ .n = "ddrck", .p = "masterck", .id = 2 },
	{ .n = "uhpck", .p = "usbck", .id = 6 },
	{ .n = "pck0", .p = "prog0", .id = 8 },
	{ .n = "pck1", .p = "prog1", .id = 9 },
	{ .n = "qspick", .p = "masterck", .id = 19 },
	};

	static const struct {
	char *n;
	u8 id;
	} sam9x60_periphck[] = {
	{ .n = "pioA_clk", .id = 2, },
	{ .n = "pioB_clk", .id = 3, },
	{ .n = "pioC_clk", .id = 4, },
	{ .n = "flex0_clk", .id = 5, },
	{ .n = "flex1_clk", .id = 6, },
	{ .n = "flex2_clk", .id = 7, },
	{ .n = "flex3_clk", .id = 8, },
	{ .n = "flex6_clk", .id = 9, },
	{ .n = "flex7_clk", .id = 10, },
	{ .n = "flex8_clk", .id = 11, },
	{ .n = "sdmmc0_clk", .id = 12, },
	{ .n = "flex4_clk", .id = 13, },
	{ .n = "flex5_clk", .id = 14, },
	{ .n = "flex9_clk", .id = 15, },
	{ .n = "flex10_clk", .id = 16, },
	{ .n = "tcb0_clk", .id = 17, },
	{ .n = "pwm_clk", .id = 18, },
	{ .n = "adc_clk", .id = 19, },
	{ .n = "dma0_clk", .id = 20, },
	{ .n = "matrix_clk", .id = 21, },
	{ .n = "uhphs_clk", .id = 22, },
	{ .n = "udphs_clk", .id = 23, },
	{ .n = "macb0_clk", .id = 24, },
	{ .n = "lcd_clk", .id = 25, },
	{ .n = "sdmmc1_clk", .id = 26, },
	{ .n = "macb1_clk", .id = 27, },
	{ .n = "ssc_clk", .id = 28, },
	{ .n = "can0_clk", .id = 29, },
	{ .n = "can1_clk", .id = 30, },
	{ .n = "flex11_clk", .id = 32, },
	{ .n = "flex12_clk", .id = 33, },
	{ .n = "i2s_clk", .id = 34, },
	{ .n = "qspi_clk", .id = 35, },
	{ .n = "gfx2d_clk", .id = 36, },
	{ .n = "pit64b_clk", .id = 37, },
	{ .n = "trng_clk", .id = 38, },
	{ .n = "aes_clk", .id = 39, },
	{ .n = "tdes_clk", .id = 40, },
	{ .n = "sha_clk", .id = 41, },
	{ .n = "classd_clk", .id = 42, },
	{ .n = "isi_clk", .id = 43, },
	{ .n = "pioD_clk", .id = 44, },
	{ .n = "tcb1_clk", .id = 45, },
	{ .n = "dbgu_clk", .id = 47, },
	{ .n = "mpddr_clk", .id = 49, },
	};

	static const struct {
	char *n;
	u8 id;
	struct clk_range r;
	bool pll;
	} sam9x60_gck[] = {
	{ .n = "flex0_gclk", .id = 5, },
	{ .n = "flex1_gclk", .id = 6, },
	{ .n = "flex2_gclk", .id = 7, },
	{ .n = "flex3_gclk", .id = 8, },
	{ .n = "flex6_gclk", .id = 9, },
	{ .n = "flex7_gclk", .id = 10, },
	{ .n = "flex8_gclk", .id = 11, },
	{ .n = "sdmmc0_gclk", .id = 12, .r = { .min = 0, .max = 105000000 }, },
	{ .n = "flex4_gclk", .id = 13, },
	{ .n = "flex5_gclk", .id = 14, },
	{ .n = "flex9_gclk", .id = 15, },
	{ .n = "flex10_gclk", .id = 16, },
	{ .n = "tcb0_gclk", .id = 17, },
	{ .n = "adc_gclk", .id = 19, },
	{ .n = "lcd_gclk", .id = 25, .r = { .min = 0, .max = 140000000 }, },
	{ .n = "sdmmc1_gclk", .id = 26, .r = { .min = 0, .max = 105000000 }, },
	{ .n = "flex11_gclk", .id = 32, },
	{ .n = "flex12_gclk", .id = 33, },
	{ .n = "i2s_gclk", .id = 34, .r = { .min = 0, .max = 105000000 },
	.pll = true, },
	{ .n = "pit64b_gclk", .id = 37, },
	{ .n = "classd_gclk", .id = 42, .r = { .min = 0, .max = 100000000 },
	.pll = true, },
	{ .n = "tcb1_gclk", .id = 45, },
	{ .n = "dbgu_gclk", .id = 47, },
	};

	static void __init sam9x60_pmc_setup(struct device_node *np)
	{
	struct clk_range range = CLK_RANGE(0, 0);
	const char td_slck_name, md_slck_name, *mainxtal_name;
	struct pmc_data *sam9x60_pmc;
	const char *parent_names[6];
	struct regmap *regmap;
	struct clk_hw *hw;
	int i;
	bool bypass;

	i = of_property_match_string(np, "clock-names", "td_slck");
	if (i < 0)
	return;

	td_slck_name = of_clk_get_parent_name(np, i);

	i = of_property_match_string(np, "clock-names", "md_slck");
	if (i < 0)
	return;

	md_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 = syscon_node_to_regmap(np);
	if (IS_ERR(regmap))
	return;

	sam9x60_pmc = pmc_data_allocate(PMC_MAIN + 1,
	nck(sam9x60_systemck),
	nck(sam9x60_periphck),
	nck(sam9x60_gck));
	if (!sam9x60_pmc)
	return;

	hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 24000000,
	50000000);
	if (IS_ERR(hw))
	goto err_free;

	bypass = of_property_read_bool(np, "atmel,osc-bypass");

	hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name,
	bypass);
	if (IS_ERR(hw))
	goto err_free;

	parent_names[0] = "main_rc_osc";
	parent_names[1] = "main_osc";
	hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, 2);
	if (IS_ERR(hw))
	goto err_free;

	sam9x60_pmc->chws[PMC_MAIN] = hw;

	hw = sam9x60_clk_register_pll(regmap, &pmc_pll_lock, "pllack",
	"mainck", 0, &plla_characteristics);
	if (IS_ERR(hw))
	goto err_free;

	hw = sam9x60_clk_register_pll(regmap, &pmc_pll_lock, "upllck",
	"main_osc", 1, &upll_characteristics);
	if (IS_ERR(hw))
	goto err_free;

	sam9x60_pmc->chws[PMC_UTMI] = hw;

	parent_names[0] = md_slck_name;
	parent_names[1] = "mainck";
	parent_names[2] = "pllack";
	hw = at91_clk_register_master(regmap, "masterck", 3, parent_names,
	&sam9x60_master_layout,
	&mck_characteristics);
	if (IS_ERR(hw))
	goto err_free;

	sam9x60_pmc->chws[PMC_MCK] = hw;

	parent_names[0] = "pllack";
	parent_names[1] = "upllck";
	parent_names[2] = "mainck";
	parent_names[3] = "mainck";
	hw = sam9x60_clk_register_usb(regmap, "usbck", parent_names, 4);
	if (IS_ERR(hw))
	goto err_free;

	parent_names[0] = md_slck_name;
	parent_names[1] = td_slck_name;
	parent_names[2] = "mainck";
	parent_names[3] = "masterck";
	parent_names[4] = "pllack";
	parent_names[5] = "upllck";
	for (i = 0; i < 8; i++) {
	char name[6];

	snprintf(name, sizeof(name), "prog%d", i);

	hw = at91_clk_register_programmable(regmap, name,
	parent_names, 6, i,
	&sam9x60_programmable_layout);
	if (IS_ERR(hw))
	goto err_free;
	}

	for (i = 0; i < ARRAY_SIZE(sam9x60_systemck); i++) {
	hw = at91_clk_register_system(regmap, sam9x60_systemck[i].n,
	sam9x60_systemck[i].p,
	sam9x60_systemck[i].id);
	if (IS_ERR(hw))
	goto err_free;

	sam9x60_pmc->shws[sam9x60_systemck[i].id] = hw;
	}

	for (i = 0; i < ARRAY_SIZE(sam9x60_periphck); i++) {
	hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
	&sam9x60_pcr_layout,
	sam9x60_periphck[i].n,
	"masterck",
	sam9x60_periphck[i].id,
	&range);
	if (IS_ERR(hw))
	goto err_free;

	sam9x60_pmc->phws[sam9x60_periphck[i].id] = hw;
	}

	for (i = 0; i < ARRAY_SIZE(sam9x60_gck); i++) {
	hw = at91_clk_register_generated(regmap, &pmc_pcr_lock,
	&sam9x60_pcr_layout,
	sam9x60_gck[i].n,
	parent_names, 6,
	sam9x60_gck[i].id,
	sam9x60_gck[i].pll,
	&sam9x60_gck[i].r);
	if (IS_ERR(hw))
	goto err_free;

	sam9x60_pmc->ghws[sam9x60_gck[i].id] = hw;
	}

	of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sam9x60_pmc);

	return;

	err_free:
	pmc_data_free(sam9x60_pmc);
	}
	/* Some clks are used for a clocksource */
	CLK_OF_DECLARE(sam9x60_pmc, "microchip,sam9x60-pmc", sam9x60_pmc_setup);