drivers/clk/at91/sama5d4.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(mck_lock);

 static const struct clk_master_characteristics mck_characteristics = {
 	.output = { .min = 125000000, .max = 200000000 },
 	.divisors = { 1, 2, 4, 3 },
 };

 static u8 plla_out[] = { 0 };

 static u16 plla_icpll[] = { 0 };

 static const struct clk_range plla_outputs[] = {
 	{ .min = 600000000, .max = 1200000000 },
 };

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

 static const struct clk_pcr_layout sama5d4_pcr_layout = {
 	.offset = 0x10c,
 	.cmd = BIT(12),
 	.pid_mask = GENMASK(6, 0),
 };

 static const struct {
 	char *n;
 	char *p;
 	unsigned long flags;
 	u8 id;
 } sama5d4_systemck[] = {
 	/*
 	 * ddrck feeds DDR controller and is enabled by bootloader thus we need
 	 * to keep it enabled in case there is no Linux consumer for it.
 	 */
 	{ .n = "ddrck", .p = "masterck_div", .id = 2, .flags = CLK_IS_CRITICAL },
 	{ .n = "lcdck", .p = "masterck_div", .id = 3 },
 	{ .n = "smdck", .p = "smdclk",       .id = 4 },
 	{ .n = "uhpck", .p = "usbck",        .id = 6 },
 	{ .n = "udpck", .p = "usbck",        .id = 7 },
 	{ .n = "pck0",  .p = "prog0",        .id = 8 },
 	{ .n = "pck1",  .p = "prog1",        .id = 9 },
 	{ .n = "pck2",  .p = "prog2",        .id = 10 },
 };

 static const struct {
 	char *n;
 	u8 id;
 } sama5d4_periph32ck[] = {
 	{ .n = "pioD_clk", .id = 5 },
 	{ .n = "usart0_clk", .id = 6 },
 	{ .n = "usart1_clk", .id = 7 },
 	{ .n = "icm_clk", .id = 9 },
 	{ .n = "aes_clk", .id = 12 },
 	{ .n = "tdes_clk", .id = 14 },
 	{ .n = "sha_clk", .id = 15 },
 	{ .n = "matrix1_clk", .id = 17 },
 	{ .n = "hsmc_clk", .id = 22 },
 	{ .n = "pioA_clk", .id = 23 },
 	{ .n = "pioB_clk", .id = 24 },
 	{ .n = "pioC_clk", .id = 25 },
 	{ .n = "pioE_clk", .id = 26 },
 	{ .n = "uart0_clk", .id = 27 },
 	{ .n = "uart1_clk", .id = 28 },
 	{ .n = "usart2_clk", .id = 29 },
 	{ .n = "usart3_clk", .id = 30 },
 	{ .n = "usart4_clk", .id = 31 },
 	{ .n = "twi0_clk", .id = 32 },
 	{ .n = "twi1_clk", .id = 33 },
 	{ .n = "twi2_clk", .id = 34 },
 	{ .n = "mci0_clk", .id = 35 },
 	{ .n = "mci1_clk", .id = 36 },
 	{ .n = "spi0_clk", .id = 37 },
 	{ .n = "spi1_clk", .id = 38 },
 	{ .n = "spi2_clk", .id = 39 },
 	{ .n = "tcb0_clk", .id = 40 },
 	{ .n = "tcb1_clk", .id = 41 },
 	{ .n = "tcb2_clk", .id = 42 },
 	{ .n = "pwm_clk", .id = 43 },
 	{ .n = "adc_clk", .id = 44 },
 	{ .n = "dbgu_clk", .id = 45 },
 	{ .n = "uhphs_clk", .id = 46 },
 	{ .n = "udphs_clk", .id = 47 },
 	{ .n = "ssc0_clk", .id = 48 },
 	{ .n = "ssc1_clk", .id = 49 },
 	{ .n = "trng_clk", .id = 53 },
 	{ .n = "macb0_clk", .id = 54 },
 	{ .n = "macb1_clk", .id = 55 },
 	{ .n = "fuse_clk", .id = 57 },
 	{ .n = "securam_clk", .id = 59 },
 	{ .n = "smd_clk", .id = 61 },
 	{ .n = "twi3_clk", .id = 62 },
 	{ .n = "catb_clk", .id = 63 },
 };

 static const struct {
 	char *n;
 	unsigned long flags;
 	u8 id;
 } sama5d4_periphck[] = {
 	{ .n = "dma0_clk", .id = 8 },
 	{ .n = "cpkcc_clk", .id = 10 },
 	{ .n = "aesb_clk", .id = 13 },
 	/*
 	 * mpddr_clk feeds DDR controller and is enabled by bootloader thus we
 	 * need to keep it enabled in case there is no Linux consumer for it.
 	 */
 	{ .n = "mpddr_clk", .id = 16, .flags = CLK_IS_CRITICAL },
 	{ .n = "matrix0_clk", .id = 18 },
 	{ .n = "vdec_clk", .id = 19 },
 	{ .n = "dma1_clk", .id = 50 },
 	{ .n = "lcdc_clk", .id = 51 },
 	{ .n = "isi_clk", .id = 52 },
 };

 static void __init sama5d4_pmc_setup(struct device_node *np)
 {
 	struct clk_range range = CLK_RANGE(0, 0);
 	const char *slck_name, *mainxtal_name;
 	struct pmc_data *sama5d4_pmc;
 	const char *parent_names[5];
 	struct regmap *regmap;
 	struct clk_hw *hw;
 	int i;
 	bool bypass;

 	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;

 	sama5d4_pmc = pmc_data_allocate(PMC_PLLACK + 1,
 					nck(sama5d4_systemck),
 					nck(sama5d4_periph32ck), 0, 3);
 	if (!sama5d4_pmc)
 		return;

 	hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000,
 					   100000000);
 	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, NULL,
 					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, NULL, 2);
 	if (IS_ERR(hw))
 		goto err_free;

 	hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0,
 				   &sama5d3_pll_layout, &plla_characteristics);
 	if (IS_ERR(hw))
 		goto err_free;

 	hw = at91_clk_register_plldiv(regmap, "plladivck", "pllack");
 	if (IS_ERR(hw))
 		goto err_free;

 	sama5d4_pmc->chws[PMC_PLLACK] = hw;

 	hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL);
 	if (IS_ERR(hw))
 		goto err_free;

 	sama5d4_pmc->chws[PMC_UTMI] = hw;

 	parent_names[0] = slck_name;
 	parent_names[1] = "mainck";
 	parent_names[2] = "plladivck";
 	parent_names[3] = "utmick";
 	hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
 					   parent_names, NULL,
 					   &at91sam9x5_master_layout,
 					   &mck_characteristics, &mck_lock);
 	if (IS_ERR(hw))
 		goto err_free;

 	hw = at91_clk_register_master_div(regmap, "masterck_div",
 					  "masterck_pres", NULL,
 					  &at91sam9x5_master_layout,
 					  &mck_characteristics, &mck_lock,
 					  CLK_SET_RATE_GATE, 0);
 	if (IS_ERR(hw))
 		goto err_free;

 	sama5d4_pmc->chws[PMC_MCK] = hw;

 	hw = at91_clk_register_h32mx(regmap, "h32mxck", "masterck_div");
 	if (IS_ERR(hw))
 		goto err_free;

 	sama5d4_pmc->chws[PMC_MCK2] = hw;

 	parent_names[0] = "plladivck";
 	parent_names[1] = "utmick";
 	hw = at91sam9x5_clk_register_usb(regmap, "usbck", parent_names, 2);
 	if (IS_ERR(hw))
 		goto err_free;

 	parent_names[0] = "plladivck";
 	parent_names[1] = "utmick";
 	hw = at91sam9x5_clk_register_smd(regmap, "smdclk", parent_names, 2);
 	if (IS_ERR(hw))
 		goto err_free;

 	parent_names[0] = slck_name;
 	parent_names[1] = "mainck";
 	parent_names[2] = "plladivck";
 	parent_names[3] = "utmick";
 	parent_names[4] = "masterck_div";
 	for (i = 0; i < 3; i++) {
 		char name[6];

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

 		hw = at91_clk_register_programmable(regmap, name,
 						    parent_names, NULL, 5, i,
 						    &at91sam9x5_programmable_layout,
 						    NULL);
 		if (IS_ERR(hw))
 			goto err_free;

 		sama5d4_pmc->pchws[i] = hw;
 	}

 	for (i = 0; i < ARRAY_SIZE(sama5d4_systemck); i++) {
 		hw = at91_clk_register_system(regmap, sama5d4_systemck[i].n,
 					      sama5d4_systemck[i].p, NULL,
 					      sama5d4_systemck[i].id,
 					      sama5d4_systemck[i].flags);
 		if (IS_ERR(hw))
 			goto err_free;

 		sama5d4_pmc->shws[sama5d4_systemck[i].id] = hw;
 	}

 	for (i = 0; i < ARRAY_SIZE(sama5d4_periphck); i++) {
 		hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 							 &sama5d4_pcr_layout,
 							 sama5d4_periphck[i].n,
 							 "masterck_div", NULL,
 							 sama5d4_periphck[i].id,
 							 &range, INT_MIN,
 							 sama5d4_periphck[i].flags);
 		if (IS_ERR(hw))
 			goto err_free;

 		sama5d4_pmc->phws[sama5d4_periphck[i].id] = hw;
 	}

 	for (i = 0; i < ARRAY_SIZE(sama5d4_periph32ck); i++) {
 		hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
 							 &sama5d4_pcr_layout,
 							 sama5d4_periph32ck[i].n,
 							 "h32mxck", NULL,
 							 sama5d4_periph32ck[i].id,
 							 &range, INT_MIN, 0);
 		if (IS_ERR(hw))
 			goto err_free;

 		sama5d4_pmc->phws[sama5d4_periph32ck[i].id] = hw;
 	}

 	of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sama5d4_pmc);

 	return;

 err_free:
 	kfree(sama5d4_pmc);
 }

 CLK_OF_DECLARE(sama5d4_pmc, "atmel,sama5d4-pmc", sama5d4_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(mck_lock);

	static const struct clk_master_characteristics mck_characteristics = {
	.output = { .min = 125000000, .max = 200000000 },
	.divisors = { 1, 2, 4, 3 },
	};

	static u8 plla_out[] = { 0 };

	static u16 plla_icpll[] = { 0 };

	static const struct clk_range plla_outputs[] = {
	{ .min = 600000000, .max = 1200000000 },
	};

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

	static const struct clk_pcr_layout sama5d4_pcr_layout = {
	.offset = 0x10c,
	.cmd = BIT(12),
	.pid_mask = GENMASK(6, 0),
	};

	static const struct {
	char *n;
	char *p;
	unsigned long flags;
	u8 id;
	} sama5d4_systemck[] = {
	/*
	* ddrck feeds DDR controller and is enabled by bootloader thus we need
	* to keep it enabled in case there is no Linux consumer for it.
	*/
	{ .n = "ddrck", .p = "masterck_div", .id = 2, .flags = CLK_IS_CRITICAL },
	{ .n = "lcdck", .p = "masterck_div", .id = 3 },
	{ .n = "smdck", .p = "smdclk", .id = 4 },
	{ .n = "uhpck", .p = "usbck", .id = 6 },
	{ .n = "udpck", .p = "usbck", .id = 7 },
	{ .n = "pck0", .p = "prog0", .id = 8 },
	{ .n = "pck1", .p = "prog1", .id = 9 },
	{ .n = "pck2", .p = "prog2", .id = 10 },
	};

	static const struct {
	char *n;
	u8 id;
	} sama5d4_periph32ck[] = {
	{ .n = "pioD_clk", .id = 5 },
	{ .n = "usart0_clk", .id = 6 },
	{ .n = "usart1_clk", .id = 7 },
	{ .n = "icm_clk", .id = 9 },
	{ .n = "aes_clk", .id = 12 },
	{ .n = "tdes_clk", .id = 14 },
	{ .n = "sha_clk", .id = 15 },
	{ .n = "matrix1_clk", .id = 17 },
	{ .n = "hsmc_clk", .id = 22 },
	{ .n = "pioA_clk", .id = 23 },
	{ .n = "pioB_clk", .id = 24 },
	{ .n = "pioC_clk", .id = 25 },
	{ .n = "pioE_clk", .id = 26 },
	{ .n = "uart0_clk", .id = 27 },
	{ .n = "uart1_clk", .id = 28 },
	{ .n = "usart2_clk", .id = 29 },
	{ .n = "usart3_clk", .id = 30 },
	{ .n = "usart4_clk", .id = 31 },
	{ .n = "twi0_clk", .id = 32 },
	{ .n = "twi1_clk", .id = 33 },
	{ .n = "twi2_clk", .id = 34 },
	{ .n = "mci0_clk", .id = 35 },
	{ .n = "mci1_clk", .id = 36 },
	{ .n = "spi0_clk", .id = 37 },
	{ .n = "spi1_clk", .id = 38 },
	{ .n = "spi2_clk", .id = 39 },
	{ .n = "tcb0_clk", .id = 40 },
	{ .n = "tcb1_clk", .id = 41 },
	{ .n = "tcb2_clk", .id = 42 },
	{ .n = "pwm_clk", .id = 43 },
	{ .n = "adc_clk", .id = 44 },
	{ .n = "dbgu_clk", .id = 45 },
	{ .n = "uhphs_clk", .id = 46 },
	{ .n = "udphs_clk", .id = 47 },
	{ .n = "ssc0_clk", .id = 48 },
	{ .n = "ssc1_clk", .id = 49 },
	{ .n = "trng_clk", .id = 53 },
	{ .n = "macb0_clk", .id = 54 },
	{ .n = "macb1_clk", .id = 55 },
	{ .n = "fuse_clk", .id = 57 },
	{ .n = "securam_clk", .id = 59 },
	{ .n = "smd_clk", .id = 61 },
	{ .n = "twi3_clk", .id = 62 },
	{ .n = "catb_clk", .id = 63 },
	};

	static const struct {
	char *n;
	unsigned long flags;
	u8 id;
	} sama5d4_periphck[] = {
	{ .n = "dma0_clk", .id = 8 },
	{ .n = "cpkcc_clk", .id = 10 },
	{ .n = "aesb_clk", .id = 13 },
	/*
	* mpddr_clk feeds DDR controller and is enabled by bootloader thus we
	* need to keep it enabled in case there is no Linux consumer for it.
	*/
	{ .n = "mpddr_clk", .id = 16, .flags = CLK_IS_CRITICAL },
	{ .n = "matrix0_clk", .id = 18 },
	{ .n = "vdec_clk", .id = 19 },
	{ .n = "dma1_clk", .id = 50 },
	{ .n = "lcdc_clk", .id = 51 },
	{ .n = "isi_clk", .id = 52 },
	};

	static void __init sama5d4_pmc_setup(struct device_node *np)
	{
	struct clk_range range = CLK_RANGE(0, 0);
	const char slck_name, mainxtal_name;
	struct pmc_data *sama5d4_pmc;
	const char *parent_names[5];
	struct regmap *regmap;
	struct clk_hw *hw;
	int i;
	bool bypass;

	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;

	sama5d4_pmc = pmc_data_allocate(PMC_PLLACK + 1,
	nck(sama5d4_systemck),
	nck(sama5d4_periph32ck), 0, 3);
	if (!sama5d4_pmc)
	return;

	hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000,
	100000000);
	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, NULL,
	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, NULL, 2);
	if (IS_ERR(hw))
	goto err_free;

	hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0,
	&sama5d3_pll_layout, &plla_characteristics);
	if (IS_ERR(hw))
	goto err_free;

	hw = at91_clk_register_plldiv(regmap, "plladivck", "pllack");
	if (IS_ERR(hw))
	goto err_free;

	sama5d4_pmc->chws[PMC_PLLACK] = hw;

	hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL);
	if (IS_ERR(hw))
	goto err_free;

	sama5d4_pmc->chws[PMC_UTMI] = hw;

	parent_names[0] = slck_name;
	parent_names[1] = "mainck";
	parent_names[2] = "plladivck";
	parent_names[3] = "utmick";
	hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
	parent_names, NULL,
	&at91sam9x5_master_layout,
	&mck_characteristics, &mck_lock);
	if (IS_ERR(hw))
	goto err_free;

	hw = at91_clk_register_master_div(regmap, "masterck_div",
	"masterck_pres", NULL,
	&at91sam9x5_master_layout,
	&mck_characteristics, &mck_lock,
	CLK_SET_RATE_GATE, 0);
	if (IS_ERR(hw))
	goto err_free;

	sama5d4_pmc->chws[PMC_MCK] = hw;

	hw = at91_clk_register_h32mx(regmap, "h32mxck", "masterck_div");
	if (IS_ERR(hw))
	goto err_free;

	sama5d4_pmc->chws[PMC_MCK2] = hw;

	parent_names[0] = "plladivck";
	parent_names[1] = "utmick";
	hw = at91sam9x5_clk_register_usb(regmap, "usbck", parent_names, 2);
	if (IS_ERR(hw))
	goto err_free;

	parent_names[0] = "plladivck";
	parent_names[1] = "utmick";
	hw = at91sam9x5_clk_register_smd(regmap, "smdclk", parent_names, 2);
	if (IS_ERR(hw))
	goto err_free;

	parent_names[0] = slck_name;
	parent_names[1] = "mainck";
	parent_names[2] = "plladivck";
	parent_names[3] = "utmick";
	parent_names[4] = "masterck_div";
	for (i = 0; i < 3; i++) {
	char name[6];

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

	hw = at91_clk_register_programmable(regmap, name,
	parent_names, NULL, 5, i,
	&at91sam9x5_programmable_layout,
	NULL);
	if (IS_ERR(hw))
	goto err_free;

	sama5d4_pmc->pchws[i] = hw;
	}

	for (i = 0; i < ARRAY_SIZE(sama5d4_systemck); i++) {
	hw = at91_clk_register_system(regmap, sama5d4_systemck[i].n,
	sama5d4_systemck[i].p, NULL,
	sama5d4_systemck[i].id,
	sama5d4_systemck[i].flags);
	if (IS_ERR(hw))
	goto err_free;

	sama5d4_pmc->shws[sama5d4_systemck[i].id] = hw;
	}

	for (i = 0; i < ARRAY_SIZE(sama5d4_periphck); i++) {
	hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
	&sama5d4_pcr_layout,
	sama5d4_periphck[i].n,
	"masterck_div", NULL,
	sama5d4_periphck[i].id,
	&range, INT_MIN,
	sama5d4_periphck[i].flags);
	if (IS_ERR(hw))
	goto err_free;

	sama5d4_pmc->phws[sama5d4_periphck[i].id] = hw;
	}

	for (i = 0; i < ARRAY_SIZE(sama5d4_periph32ck); i++) {
	hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
	&sama5d4_pcr_layout,
	sama5d4_periph32ck[i].n,
	"h32mxck", NULL,
	sama5d4_periph32ck[i].id,
	&range, INT_MIN, 0);
	if (IS_ERR(hw))
	goto err_free;

	sama5d4_pmc->phws[sama5d4_periph32ck[i].id] = hw;
	}

	of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sama5d4_pmc);

	return;

	err_free:
	kfree(sama5d4_pmc);
	}

	CLK_OF_DECLARE(sama5d4_pmc, "atmel,sama5d4-pmc", sama5d4_pmc_setup);