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alistair23-linux/drivers/clk/pistachio/clk-pistachio.c
Damien.Horsley d31ff5f7f3 clk: pistachio: correct critical clock list 
Current critical clock list for pistachio enables
only mips and sys clocks by default but there are
also other clocks that are not claimed by anyone and
needs to be enabled by default.

This patch updates the critical clocks that need
to be enabled by default.

Add a separate struct to distinguish the critical clocks
as listed:
1.) core clocks:
	a.) mips clock
2.) peripheral system clocks:
	a.) sys clock
	b.) sys_bus clock
	c.) DDR clock
	d.) ROM clock

Fixes: b35d7c33419c("CLK: Pistachio: Register core clocks")
Cc: <stable@vger.kernel.org> # 4.1
Reviewed-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Signed-off-by: Damien.Horsley <Damien.Horsley@imgtec.com>
Signed-off-by: Govindraj Raja <govindraj.raja@imgtec.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-08-26 11:34:43 -07:00

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/*
* 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_core[] __initdata = {
CLK_MIPS
};
static unsigned int pistachio_critical_clks_sys[] __initdata = {
PERIPH_CLK_SYS,
PERIPH_CLK_SYS_BUS,
PERIPH_CLK_DDR,
PERIPH_CLK_ROM,
};
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_core,
ARRAY_SIZE(pistachio_critical_clks_core));
}
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);
pistachio_clk_force_enable(p, pistachio_critical_clks_sys,
ARRAY_SIZE(pistachio_critical_clks_sys));
}
CLK_OF_DECLARE(pistachio_clk_periph, "img,pistachio-clk-periph",
pistachio_clk_periph_init);
static struct pistachio_gate pistachio_sys_gates[] __initdata = {
GATE(SYS_CLK_I2C0, "i2c0_sys", "sys", 0x8, 0),
GATE(SYS_CLK_I2C1, "i2c1_sys", "sys", 0x8, 1),
GATE(SYS_CLK_I2C2, "i2c2_sys", "sys", 0x8, 2),
GATE(SYS_CLK_I2C3, "i2c3_sys", "sys", 0x8, 3),
GATE(SYS_CLK_I2S_IN, "i2s_in_sys", "sys", 0x8, 4),
GATE(SYS_CLK_PAUD_OUT, "paud_out_sys", "sys", 0x8, 5),
GATE(SYS_CLK_SPDIF_OUT, "spdif_out_sys", "sys", 0x8, 6),
GATE(SYS_CLK_SPI0_MASTER, "spi0_master_sys", "sys", 0x8, 7),
GATE(SYS_CLK_SPI0_SLAVE, "spi0_slave_sys", "sys", 0x8, 8),
GATE(SYS_CLK_PWM, "pwm_sys", "sys", 0x8, 9),
GATE(SYS_CLK_UART0, "uart0_sys", "sys", 0x8, 10),
GATE(SYS_CLK_UART1, "uart1_sys", "sys", 0x8, 11),
GATE(SYS_CLK_SPI1, "spi1_sys", "sys", 0x8, 12),
GATE(SYS_CLK_MDC, "mdc_sys", "sys", 0x8, 13),
GATE(SYS_CLK_SD_HOST, "sd_host_sys", "sys", 0x8, 14),
GATE(SYS_CLK_ENET, "enet_sys", "sys", 0x8, 15),
GATE(SYS_CLK_IR, "ir_sys", "sys", 0x8, 16),
GATE(SYS_CLK_WD, "wd_sys", "sys", 0x8, 17),
GATE(SYS_CLK_TIMER, "timer_sys", "sys", 0x8, 18),
GATE(SYS_CLK_I2S_OUT, "i2s_out_sys", "sys", 0x8, 24),
GATE(SYS_CLK_SPDIF_IN, "spdif_in_sys", "sys", 0x8, 25),
GATE(SYS_CLK_EVENT_TIMER, "event_timer_sys", "sys", 0x8, 26),
GATE(SYS_CLK_HASH, "hash_sys", "sys", 0x8, 27),
};
static void __init pistachio_cr_periph_init(struct device_node *np)
{
struct pistachio_clk_provider *p;
p = pistachio_clk_alloc_provider(np, SYS_CLK_NR_CLKS);
if (!p)
return;
pistachio_clk_register_gate(p, pistachio_sys_gates,
ARRAY_SIZE(pistachio_sys_gates));
pistachio_clk_register_provider(p);
}
CLK_OF_DECLARE(pistachio_cr_periph, "img,pistachio-cr-periph",
pistachio_cr_periph_init);
static struct pistachio_gate pistachio_ext_gates[] __initdata = {
GATE(EXT_CLK_ENET_IN, "enet_clk_in_gate", "enet_clk_in", 0x58, 5),
GATE(EXT_CLK_AUDIO_IN, "audio_clk_in_gate", "audio_clk_in", 0x58, 8)
};
static void __init pistachio_cr_top_init(struct device_node *np)
{
struct pistachio_clk_provider *p;
p = pistachio_clk_alloc_provider(np, EXT_CLK_NR_CLKS);
if (!p)
return;
pistachio_clk_register_gate(p, pistachio_ext_gates,
ARRAY_SIZE(pistachio_ext_gates));
pistachio_clk_register_provider(p);
}
CLK_OF_DECLARE(pistachio_cr_top, "img,pistachio-cr-top",
pistachio_cr_top_init);
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