linux/drivers/clk/pistachio/clk-pistachio.c

/*
 * Pistachio SoC clock controllers
 *
 * Copyright (C) 2014 Google, Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 */

#include <linux/clk-provider.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/of.h>

#include <dt-bindings/clock/pistachio-clk.h>

#include "clk.h"

static struct pistachio_gate pistachio_gates[] __initdata = {
	GATE(CLK_MIPS, "mips", "mips_div", 0x104, 0),
	GATE(CLK_AUDIO_IN, "audio_in", "audio_clk_in_gate", 0x104, 1),
	GATE(CLK_AUDIO, "audio", "audio_div", 0x104, 2),
	GATE(CLK_I2S, "i2s", "i2s_div", 0x104, 3),
	GATE(CLK_SPDIF, "spdif", "spdif_div", 0x104, 4),
	GATE(CLK_AUDIO_DAC, "audio_dac", "audio_dac_div", 0x104, 5),
	GATE(CLK_RPU_V, "rpu_v", "rpu_v_div", 0x104, 6),
	GATE(CLK_RPU_L, "rpu_l", "rpu_l_div", 0x104, 7),
	GATE(CLK_RPU_SLEEP, "rpu_sleep", "rpu_sleep_div", 0x104, 8),
	GATE(CLK_WIFI_PLL_GATE, "wifi_pll_gate", "wifi_pll_mux", 0x104, 9),
	GATE(CLK_RPU_CORE, "rpu_core", "rpu_core_div", 0x104, 10),
	GATE(CLK_WIFI_ADC, "wifi_adc", "wifi_div8_mux", 0x104, 11),
	GATE(CLK_WIFI_DAC, "wifi_dac", "wifi_div4_mux", 0x104, 12),
	GATE(CLK_USB_PHY, "usb_phy", "usb_phy_div", 0x104, 13),
	GATE(CLK_ENET_IN, "enet_in", "enet_clk_in_gate", 0x104, 14),
	GATE(CLK_ENET, "enet", "enet_div", 0x104, 15),
	GATE(CLK_UART0, "uart0", "uart0_div", 0x104, 16),
	GATE(CLK_UART1, "uart1", "uart1_div", 0x104, 17),
	GATE(CLK_PERIPH_SYS, "periph_sys", "sys_internal_div", 0x104, 18),
	GATE(CLK_SPI0, "spi0", "spi0_div", 0x104, 19),
	GATE(CLK_SPI1, "spi1", "spi1_div", 0x104, 20),
	GATE(CLK_EVENT_TIMER, "event_timer", "event_timer_div", 0x104, 21),
	GATE(CLK_AUX_ADC_INTERNAL, "aux_adc_internal", "sys_internal_div",
	     0x104, 22),
	GATE(CLK_AUX_ADC, "aux_adc", "aux_adc_div", 0x104, 23),
	GATE(CLK_SD_HOST, "sd_host", "sd_host_div", 0x104, 24),
	GATE(CLK_BT, "bt", "bt_div", 0x104, 25),
	GATE(CLK_BT_DIV4, "bt_div4", "bt_div4_div", 0x104, 26),
	GATE(CLK_BT_DIV8, "bt_div8", "bt_div8_div", 0x104, 27),
	GATE(CLK_BT_1MHZ, "bt_1mhz", "bt_1mhz_div", 0x104, 28),
};

static struct pistachio_fixed_factor pistachio_ffs[] __initdata = {
	FIXED_FACTOR(CLK_WIFI_DIV4, "wifi_div4", "wifi_pll", 4),
	FIXED_FACTOR(CLK_WIFI_DIV8, "wifi_div8", "wifi_pll", 8),
};

static struct pistachio_div pistachio_divs[] __initdata = {
	DIV(CLK_MIPS_INTERNAL_DIV, "mips_internal_div", "mips_pll_mux",
	    0x204, 2),
	DIV(CLK_MIPS_DIV, "mips_div", "mips_internal_div", 0x208, 8),
	DIV_F(CLK_AUDIO_DIV, "audio_div", "audio_mux",
		0x20c, 8, CLK_DIVIDER_ROUND_CLOSEST),
	DIV_F(CLK_I2S_DIV, "i2s_div", "audio_pll_mux",
		0x210, 8, CLK_DIVIDER_ROUND_CLOSEST),
	DIV_F(CLK_SPDIF_DIV, "spdif_div", "audio_pll_mux",
		0x214, 8, CLK_DIVIDER_ROUND_CLOSEST),
	DIV_F(CLK_AUDIO_DAC_DIV, "audio_dac_div", "audio_pll_mux",
		0x218, 8, CLK_DIVIDER_ROUND_CLOSEST),
	DIV(CLK_RPU_V_DIV, "rpu_v_div", "rpu_v_pll_mux", 0x21c, 2),
	DIV(CLK_RPU_L_DIV, "rpu_l_div", "rpu_l_mux", 0x220, 2),
	DIV(CLK_RPU_SLEEP_DIV, "rpu_sleep_div", "xtal", 0x224, 10),
	DIV(CLK_RPU_CORE_DIV, "rpu_core_div", "rpu_core_mux", 0x228, 3),
	DIV(CLK_USB_PHY_DIV, "usb_phy_div", "sys_internal_div", 0x22c, 6),
	DIV(CLK_ENET_DIV, "enet_div", "enet_mux", 0x230, 6),
	DIV_F(CLK_UART0_INTERNAL_DIV, "uart0_internal_div", "sys_pll_mux",
	      0x234, 3, CLK_DIVIDER_ROUND_CLOSEST),
	DIV_F(CLK_UART0_DIV, "uart0_div", "uart0_internal_div", 0x238, 10,
	      CLK_DIVIDER_ROUND_CLOSEST),
	DIV_F(CLK_UART1_INTERNAL_DIV, "uart1_internal_div", "sys_pll_mux",
	      0x23c, 3, CLK_DIVIDER_ROUND_CLOSEST),
	DIV_F(CLK_UART1_DIV, "uart1_div", "uart1_internal_div", 0x240, 10,
	      CLK_DIVIDER_ROUND_CLOSEST),
	DIV(CLK_SYS_INTERNAL_DIV, "sys_internal_div", "sys_pll_mux", 0x244, 3),
	DIV(CLK_SPI0_INTERNAL_DIV, "spi0_internal_div", "sys_pll_mux",
	    0x248, 3),
	DIV(CLK_SPI0_DIV, "spi0_div", "spi0_internal_div", 0x24c, 7),
	DIV(CLK_SPI1_INTERNAL_DIV, "spi1_internal_div", "sys_pll_mux",
	    0x250, 3),
	DIV(CLK_SPI1_DIV, "spi1_div", "spi1_internal_div", 0x254, 7),
	DIV(CLK_EVENT_TIMER_INTERNAL_DIV, "event_timer_internal_div",
	    "event_timer_mux", 0x258, 3),
	DIV(CLK_EVENT_TIMER_DIV, "event_timer_div", "event_timer_internal_div",
	    0x25c, 12),
	DIV(CLK_AUX_ADC_INTERNAL_DIV, "aux_adc_internal_div",
	    "aux_adc_internal", 0x260, 3),
	DIV(CLK_AUX_ADC_DIV, "aux_adc_div", "aux_adc_internal_div", 0x264, 10),
	DIV(CLK_SD_HOST_DIV, "sd_host_div", "sd_host_mux", 0x268, 6),
	DIV(CLK_BT_DIV, "bt_div", "bt_pll_mux", 0x26c, 6),
	DIV(CLK_BT_DIV4_DIV, "bt_div4_div", "bt_pll_mux", 0x270, 6),
	DIV(CLK_BT_DIV8_DIV, "bt_div8_div", "bt_pll_mux", 0x274, 6),
	DIV(CLK_BT_1MHZ_INTERNAL_DIV, "bt_1mhz_internal_div", "bt_pll_mux",
	    0x278, 3),
	DIV(CLK_BT_1MHZ_DIV, "bt_1mhz_div", "bt_1mhz_internal_div", 0x27c, 10),
};

PNAME(mux_xtal_audio_refclk) = { "xtal", "audio_clk_in_gate" };
PNAME(mux_xtal_mips) = { "xtal", "mips_pll" };
PNAME(mux_xtal_audio) = { "xtal", "audio_pll", "audio_in" };
PNAME(mux_audio_debug) = { "audio_pll_mux", "debug_mux" };
PNAME(mux_xtal_rpu_v) = { "xtal", "rpu_v_pll" };
PNAME(mux_xtal_rpu_l) = { "xtal", "rpu_l_pll" };
PNAME(mux_rpu_l_mips) = { "rpu_l_pll_mux", "mips_pll_mux" };
PNAME(mux_xtal_wifi) = { "xtal", "wifi_pll" };
PNAME(mux_xtal_wifi_div4) = { "xtal", "wifi_div4" };
PNAME(mux_xtal_wifi_div8) = { "xtal", "wifi_div8" };
PNAME(mux_wifi_div4_rpu_l) = { "wifi_pll_gate", "wifi_div4_mux",
			       "rpu_l_pll_mux" };
PNAME(mux_xtal_sys) = { "xtal", "sys_pll" };
PNAME(mux_sys_enet) = { "sys_internal_div", "enet_in" };
PNAME(mux_audio_sys) = { "audio_pll_mux", "sys_internal_div" };
PNAME(mux_sys_bt) = { "sys_internal_div", "bt_pll_mux" };
PNAME(mux_xtal_bt) = { "xtal", "bt_pll" };

static struct pistachio_mux pistachio_muxes[] __initdata = {
	MUX(CLK_AUDIO_REF_MUX, "audio_refclk_mux", mux_xtal_audio_refclk,
	    0x200, 0),
	MUX(CLK_MIPS_PLL_MUX, "mips_pll_mux", mux_xtal_mips, 0x200, 1),
	MUX(CLK_AUDIO_PLL_MUX, "audio_pll_mux", mux_xtal_audio, 0x200, 2),
	MUX(CLK_AUDIO_MUX, "audio_mux", mux_audio_debug, 0x200, 4),
	MUX(CLK_RPU_V_PLL_MUX, "rpu_v_pll_mux", mux_xtal_rpu_v, 0x200, 5),
	MUX(CLK_RPU_L_PLL_MUX, "rpu_l_pll_mux", mux_xtal_rpu_l, 0x200, 6),
	MUX(CLK_RPU_L_MUX, "rpu_l_mux", mux_rpu_l_mips, 0x200, 7),
	MUX(CLK_WIFI_PLL_MUX, "wifi_pll_mux", mux_xtal_wifi, 0x200, 8),
	MUX(CLK_WIFI_DIV4_MUX, "wifi_div4_mux", mux_xtal_wifi_div4, 0x200, 9),
	MUX(CLK_WIFI_DIV8_MUX, "wifi_div8_mux", mux_xtal_wifi_div8, 0x200, 10),
	MUX(CLK_RPU_CORE_MUX, "rpu_core_mux", mux_wifi_div4_rpu_l, 0x200, 11),
	MUX(CLK_SYS_PLL_MUX, "sys_pll_mux", mux_xtal_sys, 0x200, 13),
	MUX(CLK_ENET_MUX, "enet_mux", mux_sys_enet, 0x200, 14),
	MUX(CLK_EVENT_TIMER_MUX, "event_timer_mux", mux_audio_sys, 0x200, 15),
	MUX(CLK_SD_HOST_MUX, "sd_host_mux", mux_sys_bt, 0x200, 16),
	MUX(CLK_BT_PLL_MUX, "bt_pll_mux", mux_xtal_bt, 0x200, 17),
};

static struct pistachio_pll pistachio_plls[] __initdata = {
	PLL_FIXED(CLK_MIPS_PLL, "mips_pll", "xtal", PLL_GF40LP_LAINT, 0x0),
	PLL_FIXED(CLK_AUDIO_PLL, "audio_pll", "audio_refclk_mux",
		  PLL_GF40LP_FRAC, 0xc),
	PLL_FIXED(CLK_RPU_V_PLL, "rpu_v_pll", "xtal", PLL_GF40LP_LAINT, 0x20),
	PLL_FIXED(CLK_RPU_L_PLL, "rpu_l_pll", "xtal", PLL_GF40LP_LAINT, 0x2c),
	PLL_FIXED(CLK_SYS_PLL, "sys_pll", "xtal", PLL_GF40LP_FRAC, 0x38),
	PLL_FIXED(CLK_WIFI_PLL, "wifi_pll", "xtal", PLL_GF40LP_FRAC, 0x4c),
	PLL_FIXED(CLK_BT_PLL, "bt_pll", "xtal", PLL_GF40LP_LAINT, 0x60),
};

PNAME(mux_debug) = { "mips_pll_mux", "rpu_v_pll_mux",
		     "rpu_l_pll_mux", "sys_pll_mux",
		     "wifi_pll_mux", "bt_pll_mux" };
static u32 mux_debug_idx[] = { 0x0, 0x1, 0x2, 0x4, 0x8, 0x10 };

static unsigned int pistachio_critical_clks[] __initdata = {
	CLK_MIPS,
	CLK_PERIPH_SYS,
};

static void __init pistachio_clk_init(struct device_node *np)
{
	struct pistachio_clk_provider *p;
	struct clk *debug_clk;

	p = pistachio_clk_alloc_provider(np, CLK_NR_CLKS);
	if (!p)
		return;

	pistachio_clk_register_pll(p, pistachio_plls,
				   ARRAY_SIZE(pistachio_plls));
	pistachio_clk_register_mux(p, pistachio_muxes,
				   ARRAY_SIZE(pistachio_muxes));
	pistachio_clk_register_div(p, pistachio_divs,
				   ARRAY_SIZE(pistachio_divs));
	pistachio_clk_register_fixed_factor(p, pistachio_ffs,
					    ARRAY_SIZE(pistachio_ffs));
	pistachio_clk_register_gate(p, pistachio_gates,
				    ARRAY_SIZE(pistachio_gates));

	debug_clk = clk_register_mux_table(NULL, "debug_mux", mux_debug,
					   ARRAY_SIZE(mux_debug),
					   CLK_SET_RATE_NO_REPARENT,
					   p->base + 0x200, 18, 0x1f, 0,
					   mux_debug_idx, NULL);
	p->clk_data.clks[CLK_DEBUG_MUX] = debug_clk;

	pistachio_clk_register_provider(p);

	pistachio_clk_force_enable(p, pistachio_critical_clks,
				   ARRAY_SIZE(pistachio_critical_clks));
}
CLK_OF_DECLARE(pistachio_clk, "img,pistachio-clk", pistachio_clk_init);

static struct pistachio_gate pistachio_periph_gates[] __initdata = {
	GATE(PERIPH_CLK_SYS, "sys", "periph_sys", 0x100, 0),
	GATE(PERIPH_CLK_SYS_BUS, "bus_sys", "periph_sys", 0x100, 1),
	GATE(PERIPH_CLK_DDR, "ddr", "periph_sys", 0x100, 2),
	GATE(PERIPH_CLK_ROM, "rom", "rom_div", 0x100, 3),
	GATE(PERIPH_CLK_COUNTER_FAST, "counter_fast", "counter_fast_div",
	     0x100, 4),
	GATE(PERIPH_CLK_COUNTER_SLOW, "counter_slow", "counter_slow_div",
	     0x100, 5),
	GATE(PERIPH_CLK_IR, "ir", "ir_div", 0x100, 6),
	GATE(PERIPH_CLK_WD, "wd", "wd_div", 0x100, 7),
	GATE(PERIPH_CLK_PDM, "pdm", "pdm_div", 0x100, 8),
	GATE(PERIPH_CLK_PWM, "pwm", "pwm_div", 0x100, 9),
	GATE(PERIPH_CLK_I2C0, "i2c0", "i2c0_div", 0x100, 10),
	GATE(PERIPH_CLK_I2C1, "i2c1", "i2c1_div", 0x100, 11),
	GATE(PERIPH_CLK_I2C2, "i2c2", "i2c2_div", 0x100, 12),
	GATE(PERIPH_CLK_I2C3, "i2c3", "i2c3_div", 0x100, 13),
};

static struct pistachio_div pistachio_periph_divs[] __initdata = {
	DIV(PERIPH_CLK_ROM_DIV, "rom_div", "periph_sys", 0x10c, 7),
	DIV(PERIPH_CLK_COUNTER_FAST_DIV, "counter_fast_div", "periph_sys",
	    0x110, 7),
	DIV(PERIPH_CLK_COUNTER_SLOW_PRE_DIV, "counter_slow_pre_div",
	    "periph_sys", 0x114, 7),
	DIV(PERIPH_CLK_COUNTER_SLOW_DIV, "counter_slow_div",
	    "counter_slow_pre_div", 0x118, 7),
	DIV_F(PERIPH_CLK_IR_PRE_DIV, "ir_pre_div", "periph_sys", 0x11c, 7,
	      CLK_DIVIDER_ROUND_CLOSEST),
	DIV_F(PERIPH_CLK_IR_DIV, "ir_div", "ir_pre_div", 0x120, 7,
	      CLK_DIVIDER_ROUND_CLOSEST),
	DIV_F(PERIPH_CLK_WD_PRE_DIV, "wd_pre_div", "periph_sys", 0x124, 7,
	      CLK_DIVIDER_ROUND_CLOSEST),
	DIV_F(PERIPH_CLK_WD_DIV, "wd_div", "wd_pre_div", 0x128, 7,
	      CLK_DIVIDER_ROUND_CLOSEST),
	DIV(PERIPH_CLK_PDM_PRE_DIV, "pdm_pre_div", "periph_sys", 0x12c, 7),
	DIV(PERIPH_CLK_PDM_DIV, "pdm_div", "pdm_pre_div", 0x130, 7),
	DIV(PERIPH_CLK_PWM_PRE_DIV, "pwm_pre_div", "periph_sys", 0x134, 7),
	DIV(PERIPH_CLK_PWM_DIV, "pwm_div", "pwm_pre_div", 0x138, 7),
	DIV(PERIPH_CLK_I2C0_PRE_DIV, "i2c0_pre_div", "periph_sys", 0x13c, 7),
	DIV(PERIPH_CLK_I2C0_DIV, "i2c0_div", "i2c0_pre_div", 0x140, 7),
	DIV(PERIPH_CLK_I2C1_PRE_DIV, "i2c1_pre_div", "periph_sys", 0x144, 7),
	DIV(PERIPH_CLK_I2C1_DIV, "i2c1_div", "i2c1_pre_div", 0x148, 7),
	DIV(PERIPH_CLK_I2C2_PRE_DIV, "i2c2_pre_div", "periph_sys", 0x14c, 7),
	DIV(PERIPH_CLK_I2C2_DIV, "i2c2_div", "i2c2_pre_div", 0x150, 7),
	DIV(PERIPH_CLK_I2C3_PRE_DIV, "i2c3_pre_div", "periph_sys", 0x154, 7),
	DIV(PERIPH_CLK_I2C3_DIV, "i2c3_div", "i2c3_pre_div", 0x158, 7),
};

static void __init pistachio_clk_periph_init(struct device_node *np)
{
	struct pistachio_clk_provider *p;

	p = pistachio_clk_alloc_provider(np, PERIPH_CLK_NR_CLKS);
	if (!p)
		return;

	pistachio_clk_register_div(p, pistachio_periph_divs,
				   ARRAY_SIZE(pistachio_periph_divs));
	pistachio_clk_register_gate(p, pistachio_periph_gates,
				    ARRAY_SIZE(pistachio_periph_gates));

	pistachio_clk_register_provider(p);
}
CLK_OF_DECLARE(pistachio_clk_periph, "img,pistachio-clk-periph",
	       pistachio_clk_periph_init);