drivers/clk/ux500/u8500_of_clk.c

/*
 * Clock definitions for u8500 platform.
 *
 * Copyright (C) 2012 ST-Ericsson SA
 * Author: Ulf Hansson <ulf.hansson@linaro.org>
 *
 * License terms: GNU General Public License (GPL) version 2
 */

#include <linux/of.h>
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/clk-provider.h>
#include <linux/mfd/dbx500-prcmu.h>
#include <linux/platform_data/clk-ux500.h>
#include "clk.h"

#define PRCC_SHOW(clk, base, bit) \
	clk[(base * PRCC_PERIPHS_PER_CLUSTER) + bit]

struct clk *ux500_twocell_get(struct of_phandle_args *clkspec, void *data)
{
	struct clk **clk_data = data;
	unsigned int base, bit;

	if (clkspec->args_count != 2)
		return  ERR_PTR(-EINVAL);

	base = clkspec->args[0];
	bit = clkspec->args[1];

	if (base != 1 && base != 2 && base != 3 && base != 5 && base != 6) {
		pr_err("%s: invalid PRCC base %d\n", __func__, base);
		return ERR_PTR(-EINVAL);
	}

	return PRCC_SHOW(clk_data, base, bit);
}

static const struct of_device_id u8500_clk_of_match[] = {
	{ .compatible = "stericsson,u8500-clks", },
	{ },
};

void u8500_of_clk_init(u32 clkrst1_base, u32 clkrst2_base, u32 clkrst3_base,
		       u32 clkrst5_base, u32 clkrst6_base)
{
	struct prcmu_fw_version *fw_version;
	struct device_node *np = NULL;
	struct device_node *child = NULL;
	const char *sgaclk_parent = NULL;
	struct clk *clk;

	if (of_have_populated_dt())
		np = of_find_matching_node(NULL, u8500_clk_of_match);
	if (!np) {
		pr_err("Either DT or U8500 Clock node not found\n");
		return;
	}

	/* Clock sources */
	clk = clk_reg_prcmu_gate("soc0_pll", NULL, PRCMU_PLLSOC0,
				CLK_IS_ROOT|CLK_IGNORE_UNUSED);

	clk = clk_reg_prcmu_gate("soc1_pll", NULL, PRCMU_PLLSOC1,
				CLK_IS_ROOT|CLK_IGNORE_UNUSED);

	clk = clk_reg_prcmu_gate("ddr_pll", NULL, PRCMU_PLLDDR,
				CLK_IS_ROOT|CLK_IGNORE_UNUSED);

	/* FIXME: Add sys, ulp and int clocks here. */

	clk = clk_register_fixed_rate(NULL, "rtc32k", "NULL",
				CLK_IS_ROOT|CLK_IGNORE_UNUSED,
				32768);

	/* PRCMU clocks */
	fw_version = prcmu_get_fw_version();
	if (fw_version != NULL) {
		switch (fw_version->project) {
		case PRCMU_FW_PROJECT_U8500_C2:
		case PRCMU_FW_PROJECT_U8520:
		case PRCMU_FW_PROJECT_U8420:
			sgaclk_parent = "soc0_pll";
			break;
		default:
			break;
		}
	}

	if (sgaclk_parent)
		clk = clk_reg_prcmu_gate("sgclk", sgaclk_parent,
					PRCMU_SGACLK, 0);
	else
		clk = clk_reg_prcmu_gate("sgclk", NULL,
					PRCMU_SGACLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("uartclk", NULL, PRCMU_UARTCLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("msp02clk", NULL, PRCMU_MSP02CLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("msp1clk", NULL, PRCMU_MSP1CLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("i2cclk", NULL, PRCMU_I2CCLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("slimclk", NULL, PRCMU_SLIMCLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("per1clk", NULL, PRCMU_PER1CLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("per2clk", NULL, PRCMU_PER2CLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("per3clk", NULL, PRCMU_PER3CLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("per5clk", NULL, PRCMU_PER5CLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("per6clk", NULL, PRCMU_PER6CLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("per7clk", NULL, PRCMU_PER7CLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_scalable("lcdclk", NULL, PRCMU_LCDCLK, 0,
				CLK_IS_ROOT|CLK_SET_RATE_GATE);

	clk = clk_reg_prcmu_opp_gate("bmlclk", NULL, PRCMU_BMLCLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_scalable("hsitxclk", NULL, PRCMU_HSITXCLK, 0,
				CLK_IS_ROOT|CLK_SET_RATE_GATE);

	clk = clk_reg_prcmu_scalable("hsirxclk", NULL, PRCMU_HSIRXCLK, 0,
				CLK_IS_ROOT|CLK_SET_RATE_GATE);

	clk = clk_reg_prcmu_scalable("hdmiclk", NULL, PRCMU_HDMICLK, 0,
				CLK_IS_ROOT|CLK_SET_RATE_GATE);

	clk = clk_reg_prcmu_gate("apeatclk", NULL, PRCMU_APEATCLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("apetraceclk", NULL, PRCMU_APETRACECLK,
				CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("mcdeclk", NULL, PRCMU_MCDECLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_opp_gate("ipi2cclk", NULL, PRCMU_IPI2CCLK,
				CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("dsialtclk", NULL, PRCMU_DSIALTCLK,
				CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("dmaclk", NULL, PRCMU_DMACLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("b2r2clk", NULL, PRCMU_B2R2CLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_scalable("tvclk", NULL, PRCMU_TVCLK, 0,
				CLK_IS_ROOT|CLK_SET_RATE_GATE);

	clk = clk_reg_prcmu_gate("sspclk", NULL, PRCMU_SSPCLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("rngclk", NULL, PRCMU_RNGCLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("uiccclk", NULL, PRCMU_UICCCLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_gate("timclk", NULL, PRCMU_TIMCLK, CLK_IS_ROOT);

	clk = clk_reg_prcmu_opp_volt_scalable("sdmmcclk", NULL, PRCMU_SDMMCCLK,
					100000000,
					CLK_IS_ROOT|CLK_SET_RATE_GATE);

	clk = clk_reg_prcmu_scalable("dsi_pll", "hdmiclk",
				PRCMU_PLLDSI, 0, CLK_SET_RATE_GATE);


	clk = clk_reg_prcmu_scalable("dsi0clk", "dsi_pll",
				PRCMU_DSI0CLK, 0, CLK_SET_RATE_GATE);

	clk = clk_reg_prcmu_scalable("dsi1clk", "dsi_pll",
				PRCMU_DSI1CLK, 0, CLK_SET_RATE_GATE);

	clk = clk_reg_prcmu_scalable("dsi0escclk", "tvclk",
				PRCMU_DSI0ESCCLK, 0, CLK_SET_RATE_GATE);

	clk = clk_reg_prcmu_scalable("dsi1escclk", "tvclk",
				PRCMU_DSI1ESCCLK, 0, CLK_SET_RATE_GATE);

	clk = clk_reg_prcmu_scalable("dsi2escclk", "tvclk",
				PRCMU_DSI2ESCCLK, 0, CLK_SET_RATE_GATE);

	clk = clk_reg_prcmu_scalable_rate("armss", NULL,
				PRCMU_ARMSS, 0, CLK_IS_ROOT|CLK_IGNORE_UNUSED);

	clk = clk_register_fixed_factor(NULL, "smp_twd", "armss",
				CLK_IGNORE_UNUSED, 1, 2);

	/*
	 * FIXME: Add special handled PRCMU clocks here:
	 * 1. clkout0yuv, use PRCMU as parent + need regulator + pinctrl.
	 * 2. ab9540_clkout1yuv, see clkout0yuv
	 */

	/* PRCC P-clocks */
	clk = clk_reg_prcc_pclk("p1_pclk0", "per1clk", clkrst1_base,
				BIT(0), 0);

	clk = clk_reg_prcc_pclk("p1_pclk1", "per1clk", clkrst1_base,
				BIT(1), 0);

	clk = clk_reg_prcc_pclk("p1_pclk2", "per1clk", clkrst1_base,
				BIT(2), 0);

	clk = clk_reg_prcc_pclk("p1_pclk3", "per1clk", clkrst1_base,
				BIT(3), 0);

	clk = clk_reg_prcc_pclk("p1_pclk4", "per1clk", clkrst1_base,
				BIT(4), 0);

	clk = clk_reg_prcc_pclk("p1_pclk5", "per1clk", clkrst1_base,
				BIT(5), 0);

	clk = clk_reg_prcc_pclk("p1_pclk6", "per1clk", clkrst1_base,
				BIT(6), 0);

	clk = clk_reg_prcc_pclk("p1_pclk7", "per1clk", clkrst1_base,
				BIT(7), 0);

	clk = clk_reg_prcc_pclk("p1_pclk8", "per1clk", clkrst1_base,
				BIT(8), 0);

	clk = clk_reg_prcc_pclk("p1_pclk9", "per1clk", clkrst1_base,
				BIT(9), 0);

	clk = clk_reg_prcc_pclk("p1_pclk10", "per1clk", clkrst1_base,
				BIT(10), 0);

	clk = clk_reg_prcc_pclk("p1_pclk11", "per1clk", clkrst1_base,
				BIT(11), 0);

	clk = clk_reg_prcc_pclk("p2_pclk0", "per2clk", clkrst2_base,
				BIT(0), 0);

	clk = clk_reg_prcc_pclk("p2_pclk1", "per2clk", clkrst2_base,
				BIT(1), 0);

	clk = clk_reg_prcc_pclk("p2_pclk2", "per2clk", clkrst2_base,
				BIT(2), 0);

	clk = clk_reg_prcc_pclk("p2_pclk3", "per2clk", clkrst2_base,
				BIT(3), 0);

	clk = clk_reg_prcc_pclk("p2_pclk4", "per2clk", clkrst2_base,
				BIT(4), 0);

	clk = clk_reg_prcc_pclk("p2_pclk5", "per2clk", clkrst2_base,
				BIT(5), 0);

	clk = clk_reg_prcc_pclk("p2_pclk6", "per2clk", clkrst2_base,
				BIT(6), 0);

	clk = clk_reg_prcc_pclk("p2_pclk7", "per2clk", clkrst2_base,
				BIT(7), 0);

	clk = clk_reg_prcc_pclk("p2_pclk8", "per2clk", clkrst2_base,
				BIT(8), 0);

	clk = clk_reg_prcc_pclk("p2_pclk9", "per2clk", clkrst2_base,
				BIT(9), 0);

	clk = clk_reg_prcc_pclk("p2_pclk10", "per2clk", clkrst2_base,
				BIT(10), 0);

	clk = clk_reg_prcc_pclk("p2_pclk11", "per2clk", clkrst2_base,
				BIT(11), 0);

	clk = clk_reg_prcc_pclk("p2_pclk12", "per2clk", clkrst2_base,
				BIT(12), 0);

	clk = clk_reg_prcc_pclk("p3_pclk0", "per3clk", clkrst3_base,
				BIT(0), 0);

	clk = clk_reg_prcc_pclk("p3_pclk1", "per3clk", clkrst3_base,
				BIT(1), 0);

	clk = clk_reg_prcc_pclk("p3_pclk2", "per3clk", clkrst3_base,
				BIT(2), 0);

	clk = clk_reg_prcc_pclk("p3_pclk3", "per3clk", clkrst3_base,
				BIT(3), 0);

	clk = clk_reg_prcc_pclk("p3_pclk4", "per3clk", clkrst3_base,
				BIT(4), 0);

	clk = clk_reg_prcc_pclk("p3_pclk5", "per3clk", clkrst3_base,
				BIT(5), 0);

	clk = clk_reg_prcc_pclk("p3_pclk6", "per3clk", clkrst3_base,
				BIT(6), 0);

	clk = clk_reg_prcc_pclk("p3_pclk7", "per3clk", clkrst3_base,
				BIT(7), 0);

	clk = clk_reg_prcc_pclk("p3_pclk8", "per3clk", clkrst3_base,
				BIT(8), 0);

	clk = clk_reg_prcc_pclk("p5_pclk0", "per5clk", clkrst5_base,
				BIT(0), 0);

	clk = clk_reg_prcc_pclk("p5_pclk1", "per5clk", clkrst5_base,
				BIT(1), 0);

	clk = clk_reg_prcc_pclk("p6_pclk0", "per6clk", clkrst6_base,
				BIT(0), 0);

	clk = clk_reg_prcc_pclk("p6_pclk1", "per6clk", clkrst6_base,
				BIT(1), 0);

	clk = clk_reg_prcc_pclk("p6_pclk2", "per6clk", clkrst6_base,
				BIT(2), 0);

	clk = clk_reg_prcc_pclk("p6_pclk3", "per6clk", clkrst6_base,
				BIT(3), 0);

	clk = clk_reg_prcc_pclk("p6_pclk4", "per6clk", clkrst6_base,
				BIT(4), 0);

	clk = clk_reg_prcc_pclk("p6_pclk5", "per6clk", clkrst6_base,
				BIT(5), 0);

	clk = clk_reg_prcc_pclk("p6_pclk6", "per6clk", clkrst6_base,
				BIT(6), 0);

	clk = clk_reg_prcc_pclk("p6_pclk7", "per6clk", clkrst6_base,
				BIT(7), 0);

	/* PRCC K-clocks
	 *
	 * FIXME: Some drivers requires PERPIH[n| to be automatically enabled
	 * by enabling just the K-clock, even if it is not a valid parent to
	 * the K-clock. Until drivers get fixed we might need some kind of
	 * "parent muxed join".
	 */

	/* Periph1 */
	clk = clk_reg_prcc_kclk("p1_uart0_kclk", "uartclk",
			clkrst1_base, BIT(0), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p1_uart1_kclk", "uartclk",
			clkrst1_base, BIT(1), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p1_i2c1_kclk", "i2cclk",
			clkrst1_base, BIT(2), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p1_msp0_kclk", "msp02clk",
			clkrst1_base, BIT(3), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p1_msp1_kclk", "msp1clk",
			clkrst1_base, BIT(4), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p1_sdi0_kclk", "sdmmcclk",
			clkrst1_base, BIT(5), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p1_i2c2_kclk", "i2cclk",
			clkrst1_base, BIT(6), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p1_slimbus0_kclk", "slimclk",
			clkrst1_base, BIT(8), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p1_i2c4_kclk", "i2cclk",
			clkrst1_base, BIT(9), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p1_msp3_kclk", "msp1clk",
			clkrst1_base, BIT(10), CLK_SET_RATE_GATE);

	/* Periph2 */
	clk = clk_reg_prcc_kclk("p2_i2c3_kclk", "i2cclk",
			clkrst2_base, BIT(0), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p2_sdi4_kclk", "sdmmcclk",
			clkrst2_base, BIT(2), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p2_msp2_kclk", "msp02clk",
			clkrst2_base, BIT(3), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p2_sdi1_kclk", "sdmmcclk",
			clkrst2_base, BIT(4), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p2_sdi3_kclk", "sdmmcclk",
			clkrst2_base, BIT(5), CLK_SET_RATE_GATE);

	/* Note that rate is received from parent. */
	clk = clk_reg_prcc_kclk("p2_ssirx_kclk", "hsirxclk",
			clkrst2_base, BIT(6),
			CLK_SET_RATE_GATE|CLK_SET_RATE_PARENT);
	clk = clk_reg_prcc_kclk("p2_ssitx_kclk", "hsitxclk",
			clkrst2_base, BIT(7),
			CLK_SET_RATE_GATE|CLK_SET_RATE_PARENT);

	/* Periph3 */
	clk = clk_reg_prcc_kclk("p3_ssp0_kclk", "sspclk",
			clkrst3_base, BIT(1), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p3_ssp1_kclk", "sspclk",
			clkrst3_base, BIT(2), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p3_i2c0_kclk", "i2cclk",
			clkrst3_base, BIT(3), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p3_sdi2_kclk", "sdmmcclk",
			clkrst3_base, BIT(4), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p3_ske_kclk", "rtc32k",
			clkrst3_base, BIT(5), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p3_uart2_kclk", "uartclk",
			clkrst3_base, BIT(6), CLK_SET_RATE_GATE);

	clk = clk_reg_prcc_kclk("p3_sdi5_kclk", "sdmmcclk",
			clkrst3_base, BIT(7), CLK_SET_RATE_GATE);

	/* Periph6 */
	clk = clk_reg_prcc_kclk("p3_rng_kclk", "rngclk",
			clkrst6_base, BIT(0), CLK_SET_RATE_GATE);

	for_each_child_of_node(np, child) {
		/* Place holder for supported nodes. */
	}
}