1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Hisilicon Hi3620 clock driver
4  *
5  * Copyright (c) 2012-2013 Hisilicon Limited.
6  * Copyright (c) 2012-2013 Linaro Limited.
7  *
8  * Author: Haojian Zhuang <haojian.zhuang@linaro.org>
9  *	   Xin Li <li.xin@linaro.org>
10  */
11 
12 #include <linux/kernel.h>
13 #include <linux/clk-provider.h>
14 #include <linux/io.h>
15 #include <linux/of.h>
16 #include <linux/of_address.h>
17 #include <linux/slab.h>
18 
19 #include <dt-bindings/clock/hi3620-clock.h>
20 
21 #include "clk.h"
22 
23 /* clock parent list */
24 static const char *const timer0_mux_p[] __initconst = { "osc32k", "timerclk01", };
25 static const char *const timer1_mux_p[] __initconst = { "osc32k", "timerclk01", };
26 static const char *const timer2_mux_p[] __initconst = { "osc32k", "timerclk23", };
27 static const char *const timer3_mux_p[] __initconst = { "osc32k", "timerclk23", };
28 static const char *const timer4_mux_p[] __initconst = { "osc32k", "timerclk45", };
29 static const char *const timer5_mux_p[] __initconst = { "osc32k", "timerclk45", };
30 static const char *const timer6_mux_p[] __initconst = { "osc32k", "timerclk67", };
31 static const char *const timer7_mux_p[] __initconst = { "osc32k", "timerclk67", };
32 static const char *const timer8_mux_p[] __initconst = { "osc32k", "timerclk89", };
33 static const char *const timer9_mux_p[] __initconst = { "osc32k", "timerclk89", };
34 static const char *const uart0_mux_p[] __initconst = { "osc26m", "pclk", };
35 static const char *const uart1_mux_p[] __initconst = { "osc26m", "pclk", };
36 static const char *const uart2_mux_p[] __initconst = { "osc26m", "pclk", };
37 static const char *const uart3_mux_p[] __initconst = { "osc26m", "pclk", };
38 static const char *const uart4_mux_p[] __initconst = { "osc26m", "pclk", };
39 static const char *const spi0_mux_p[] __initconst = { "osc26m", "rclk_cfgaxi", };
40 static const char *const spi1_mux_p[] __initconst = { "osc26m", "rclk_cfgaxi", };
41 static const char *const spi2_mux_p[] __initconst = { "osc26m", "rclk_cfgaxi", };
42 /* share axi parent */
43 static const char *const saxi_mux_p[] __initconst = { "armpll3", "armpll2", };
44 static const char *const pwm0_mux_p[] __initconst = { "osc32k", "osc26m", };
45 static const char *const pwm1_mux_p[] __initconst = { "osc32k", "osc26m", };
46 static const char *const sd_mux_p[] __initconst = { "armpll2", "armpll3", };
47 static const char *const mmc1_mux_p[] __initconst = { "armpll2", "armpll3", };
48 static const char *const mmc1_mux2_p[] __initconst = { "osc26m", "mmc1_div", };
49 static const char *const g2d_mux_p[] __initconst = { "armpll2", "armpll3", };
50 static const char *const venc_mux_p[] __initconst = { "armpll2", "armpll3", };
51 static const char *const vdec_mux_p[] __initconst = { "armpll2", "armpll3", };
52 static const char *const vpp_mux_p[] __initconst = { "armpll2", "armpll3", };
53 static const char *const edc0_mux_p[] __initconst = { "armpll2", "armpll3", };
54 static const char *const ldi0_mux_p[] __initconst = { "armpll2", "armpll4",
55 					     "armpll3", "armpll5", };
56 static const char *const edc1_mux_p[] __initconst = { "armpll2", "armpll3", };
57 static const char *const ldi1_mux_p[] __initconst = { "armpll2", "armpll4",
58 					     "armpll3", "armpll5", };
59 static const char *const rclk_hsic_p[] __initconst = { "armpll3", "armpll2", };
60 static const char *const mmc2_mux_p[] __initconst = { "armpll2", "armpll3", };
61 static const char *const mmc3_mux_p[] __initconst = { "armpll2", "armpll3", };
62 
63 
64 /* fixed rate clocks */
65 static struct hisi_fixed_rate_clock hi3620_fixed_rate_clks[] __initdata = {
66 	{ HI3620_OSC32K,   "osc32k",   NULL, 0, 32768, },
67 	{ HI3620_OSC26M,   "osc26m",   NULL, 0, 26000000, },
68 	{ HI3620_PCLK,     "pclk",     NULL, 0, 26000000, },
69 	{ HI3620_PLL_ARM0, "armpll0",  NULL, 0, 1600000000, },
70 	{ HI3620_PLL_ARM1, "armpll1",  NULL, 0, 1600000000, },
71 	{ HI3620_PLL_PERI, "armpll2",  NULL, 0, 1440000000, },
72 	{ HI3620_PLL_USB,  "armpll3",  NULL, 0, 1440000000, },
73 	{ HI3620_PLL_HDMI, "armpll4",  NULL, 0, 1188000000, },
74 	{ HI3620_PLL_GPU,  "armpll5",  NULL, 0, 1300000000, },
75 };
76 
77 /* fixed factor clocks */
78 static struct hisi_fixed_factor_clock hi3620_fixed_factor_clks[] __initdata = {
79 	{ HI3620_RCLK_TCXO,   "rclk_tcxo",   "osc26m",   1, 4,  0, },
80 	{ HI3620_RCLK_CFGAXI, "rclk_cfgaxi", "armpll2",  1, 30, 0, },
81 	{ HI3620_RCLK_PICO,   "rclk_pico",   "hsic_div", 1, 40, 0, },
82 };
83 
84 static struct hisi_mux_clock hi3620_mux_clks[] __initdata = {
85 	{ HI3620_TIMER0_MUX, "timer0_mux", timer0_mux_p, ARRAY_SIZE(timer0_mux_p), CLK_SET_RATE_PARENT, 0,     15, 2, 0,                   },
86 	{ HI3620_TIMER1_MUX, "timer1_mux", timer1_mux_p, ARRAY_SIZE(timer1_mux_p), CLK_SET_RATE_PARENT, 0,     17, 2, 0,                   },
87 	{ HI3620_TIMER2_MUX, "timer2_mux", timer2_mux_p, ARRAY_SIZE(timer2_mux_p), CLK_SET_RATE_PARENT, 0,     19, 2, 0,                   },
88 	{ HI3620_TIMER3_MUX, "timer3_mux", timer3_mux_p, ARRAY_SIZE(timer3_mux_p), CLK_SET_RATE_PARENT, 0,     21, 2, 0,                   },
89 	{ HI3620_TIMER4_MUX, "timer4_mux", timer4_mux_p, ARRAY_SIZE(timer4_mux_p), CLK_SET_RATE_PARENT, 0x18,  0,  2, 0,                   },
90 	{ HI3620_TIMER5_MUX, "timer5_mux", timer5_mux_p, ARRAY_SIZE(timer5_mux_p), CLK_SET_RATE_PARENT, 0x18,  2,  2, 0,                   },
91 	{ HI3620_TIMER6_MUX, "timer6_mux", timer6_mux_p, ARRAY_SIZE(timer6_mux_p), CLK_SET_RATE_PARENT, 0x18,  4,  2, 0,                   },
92 	{ HI3620_TIMER7_MUX, "timer7_mux", timer7_mux_p, ARRAY_SIZE(timer7_mux_p), CLK_SET_RATE_PARENT, 0x18,  6,  2, 0,                   },
93 	{ HI3620_TIMER8_MUX, "timer8_mux", timer8_mux_p, ARRAY_SIZE(timer8_mux_p), CLK_SET_RATE_PARENT, 0x18,  8,  2, 0,                   },
94 	{ HI3620_TIMER9_MUX, "timer9_mux", timer9_mux_p, ARRAY_SIZE(timer9_mux_p), CLK_SET_RATE_PARENT, 0x18,  10, 2, 0,                   },
95 	{ HI3620_UART0_MUX,  "uart0_mux",  uart0_mux_p,  ARRAY_SIZE(uart0_mux_p),  CLK_SET_RATE_PARENT, 0x100, 7,  1, CLK_MUX_HIWORD_MASK, },
96 	{ HI3620_UART1_MUX,  "uart1_mux",  uart1_mux_p,  ARRAY_SIZE(uart1_mux_p),  CLK_SET_RATE_PARENT, 0x100, 8,  1, CLK_MUX_HIWORD_MASK, },
97 	{ HI3620_UART2_MUX,  "uart2_mux",  uart2_mux_p,  ARRAY_SIZE(uart2_mux_p),  CLK_SET_RATE_PARENT, 0x100, 9,  1, CLK_MUX_HIWORD_MASK, },
98 	{ HI3620_UART3_MUX,  "uart3_mux",  uart3_mux_p,  ARRAY_SIZE(uart3_mux_p),  CLK_SET_RATE_PARENT, 0x100, 10, 1, CLK_MUX_HIWORD_MASK, },
99 	{ HI3620_UART4_MUX,  "uart4_mux",  uart4_mux_p,  ARRAY_SIZE(uart4_mux_p),  CLK_SET_RATE_PARENT, 0x100, 11, 1, CLK_MUX_HIWORD_MASK, },
100 	{ HI3620_SPI0_MUX,   "spi0_mux",   spi0_mux_p,   ARRAY_SIZE(spi0_mux_p),   CLK_SET_RATE_PARENT, 0x100, 12, 1, CLK_MUX_HIWORD_MASK, },
101 	{ HI3620_SPI1_MUX,   "spi1_mux",   spi1_mux_p,   ARRAY_SIZE(spi1_mux_p),   CLK_SET_RATE_PARENT, 0x100, 13, 1, CLK_MUX_HIWORD_MASK, },
102 	{ HI3620_SPI2_MUX,   "spi2_mux",   spi2_mux_p,   ARRAY_SIZE(spi2_mux_p),   CLK_SET_RATE_PARENT, 0x100, 14, 1, CLK_MUX_HIWORD_MASK, },
103 	{ HI3620_SAXI_MUX,   "saxi_mux",   saxi_mux_p,   ARRAY_SIZE(saxi_mux_p),   CLK_SET_RATE_PARENT, 0x100, 15, 1, CLK_MUX_HIWORD_MASK, },
104 	{ HI3620_PWM0_MUX,   "pwm0_mux",   pwm0_mux_p,   ARRAY_SIZE(pwm0_mux_p),   CLK_SET_RATE_PARENT, 0x104, 10, 1, CLK_MUX_HIWORD_MASK, },
105 	{ HI3620_PWM1_MUX,   "pwm1_mux",   pwm1_mux_p,   ARRAY_SIZE(pwm1_mux_p),   CLK_SET_RATE_PARENT, 0x104, 11, 1, CLK_MUX_HIWORD_MASK, },
106 	{ HI3620_SD_MUX,     "sd_mux",     sd_mux_p,     ARRAY_SIZE(sd_mux_p),     CLK_SET_RATE_PARENT, 0x108, 4,  1, CLK_MUX_HIWORD_MASK, },
107 	{ HI3620_MMC1_MUX,   "mmc1_mux",   mmc1_mux_p,   ARRAY_SIZE(mmc1_mux_p),   CLK_SET_RATE_PARENT, 0x108, 9,  1, CLK_MUX_HIWORD_MASK, },
108 	{ HI3620_MMC1_MUX2,  "mmc1_mux2",  mmc1_mux2_p,  ARRAY_SIZE(mmc1_mux2_p),  CLK_SET_RATE_PARENT, 0x108, 10, 1, CLK_MUX_HIWORD_MASK, },
109 	{ HI3620_G2D_MUX,    "g2d_mux",    g2d_mux_p,    ARRAY_SIZE(g2d_mux_p),    CLK_SET_RATE_PARENT, 0x10c, 5,  1, CLK_MUX_HIWORD_MASK, },
110 	{ HI3620_VENC_MUX,   "venc_mux",   venc_mux_p,   ARRAY_SIZE(venc_mux_p),   CLK_SET_RATE_PARENT, 0x10c, 11, 1, CLK_MUX_HIWORD_MASK, },
111 	{ HI3620_VDEC_MUX,   "vdec_mux",   vdec_mux_p,   ARRAY_SIZE(vdec_mux_p),   CLK_SET_RATE_PARENT, 0x110, 5,  1, CLK_MUX_HIWORD_MASK, },
112 	{ HI3620_VPP_MUX,    "vpp_mux",    vpp_mux_p,    ARRAY_SIZE(vpp_mux_p),    CLK_SET_RATE_PARENT, 0x110, 11, 1, CLK_MUX_HIWORD_MASK, },
113 	{ HI3620_EDC0_MUX,   "edc0_mux",   edc0_mux_p,   ARRAY_SIZE(edc0_mux_p),   CLK_SET_RATE_PARENT, 0x114, 6,  1, CLK_MUX_HIWORD_MASK, },
114 	{ HI3620_LDI0_MUX,   "ldi0_mux",   ldi0_mux_p,   ARRAY_SIZE(ldi0_mux_p),   CLK_SET_RATE_PARENT, 0x114, 13, 2, CLK_MUX_HIWORD_MASK, },
115 	{ HI3620_EDC1_MUX,   "edc1_mux",   edc1_mux_p,   ARRAY_SIZE(edc1_mux_p),   CLK_SET_RATE_PARENT, 0x118, 6,  1, CLK_MUX_HIWORD_MASK, },
116 	{ HI3620_LDI1_MUX,   "ldi1_mux",   ldi1_mux_p,   ARRAY_SIZE(ldi1_mux_p),   CLK_SET_RATE_PARENT, 0x118, 14, 2, CLK_MUX_HIWORD_MASK, },
117 	{ HI3620_RCLK_HSIC,  "rclk_hsic",  rclk_hsic_p,  ARRAY_SIZE(rclk_hsic_p),  CLK_SET_RATE_PARENT, 0x130, 2,  1, CLK_MUX_HIWORD_MASK, },
118 	{ HI3620_MMC2_MUX,   "mmc2_mux",   mmc2_mux_p,   ARRAY_SIZE(mmc2_mux_p),   CLK_SET_RATE_PARENT, 0x140, 4,  1, CLK_MUX_HIWORD_MASK, },
119 	{ HI3620_MMC3_MUX,   "mmc3_mux",   mmc3_mux_p,   ARRAY_SIZE(mmc3_mux_p),   CLK_SET_RATE_PARENT, 0x140, 9,  1, CLK_MUX_HIWORD_MASK, },
120 };
121 
122 static struct hisi_divider_clock hi3620_div_clks[] __initdata = {
123 	{ HI3620_SHAREAXI_DIV, "saxi_div",   "saxi_mux",  0, 0x100, 0, 5, CLK_DIVIDER_HIWORD_MASK, NULL, },
124 	{ HI3620_CFGAXI_DIV,   "cfgaxi_div", "saxi_div",  0, 0x100, 5, 2, CLK_DIVIDER_HIWORD_MASK, NULL, },
125 	{ HI3620_SD_DIV,       "sd_div",     "sd_mux",	  0, 0x108, 0, 4, CLK_DIVIDER_HIWORD_MASK, NULL, },
126 	{ HI3620_MMC1_DIV,     "mmc1_div",   "mmc1_mux",  0, 0x108, 5, 4, CLK_DIVIDER_HIWORD_MASK, NULL, },
127 	{ HI3620_HSIC_DIV,     "hsic_div",   "rclk_hsic", 0, 0x130, 0, 2, CLK_DIVIDER_HIWORD_MASK, NULL, },
128 	{ HI3620_MMC2_DIV,     "mmc2_div",   "mmc2_mux",  0, 0x140, 0, 4, CLK_DIVIDER_HIWORD_MASK, NULL, },
129 	{ HI3620_MMC3_DIV,     "mmc3_div",   "mmc3_mux",  0, 0x140, 5, 4, CLK_DIVIDER_HIWORD_MASK, NULL, },
130 };
131 
132 static struct hisi_gate_clock hi3620_separated_gate_clks[] __initdata = {
133 	{ HI3620_TIMERCLK01,   "timerclk01",   "timer_rclk01", CLK_SET_RATE_PARENT, 0x20, 0, 0, },
134 	{ HI3620_TIMER_RCLK01, "timer_rclk01", "rclk_tcxo",    CLK_SET_RATE_PARENT, 0x20, 1, 0, },
135 	{ HI3620_TIMERCLK23,   "timerclk23",   "timer_rclk23", CLK_SET_RATE_PARENT, 0x20, 2, 0, },
136 	{ HI3620_TIMER_RCLK23, "timer_rclk23", "rclk_tcxo",    CLK_SET_RATE_PARENT, 0x20, 3, 0, },
137 	{ HI3620_RTCCLK,       "rtcclk",       "pclk",         CLK_SET_RATE_PARENT, 0x20, 5, 0, },
138 	{ HI3620_KPC_CLK,      "kpc_clk",      "pclk",         CLK_SET_RATE_PARENT, 0x20, 6, 0, },
139 	{ HI3620_GPIOCLK0,     "gpioclk0",     "pclk",         CLK_SET_RATE_PARENT, 0x20, 8, 0, },
140 	{ HI3620_GPIOCLK1,     "gpioclk1",     "pclk",         CLK_SET_RATE_PARENT, 0x20, 9, 0, },
141 	{ HI3620_GPIOCLK2,     "gpioclk2",     "pclk",         CLK_SET_RATE_PARENT, 0x20, 10, 0, },
142 	{ HI3620_GPIOCLK3,     "gpioclk3",     "pclk",         CLK_SET_RATE_PARENT, 0x20, 11, 0, },
143 	{ HI3620_GPIOCLK4,     "gpioclk4",     "pclk",         CLK_SET_RATE_PARENT, 0x20, 12, 0, },
144 	{ HI3620_GPIOCLK5,     "gpioclk5",     "pclk",         CLK_SET_RATE_PARENT, 0x20, 13, 0, },
145 	{ HI3620_GPIOCLK6,     "gpioclk6",     "pclk",         CLK_SET_RATE_PARENT, 0x20, 14, 0, },
146 	{ HI3620_GPIOCLK7,     "gpioclk7",     "pclk",         CLK_SET_RATE_PARENT, 0x20, 15, 0, },
147 	{ HI3620_GPIOCLK8,     "gpioclk8",     "pclk",         CLK_SET_RATE_PARENT, 0x20, 16, 0, },
148 	{ HI3620_GPIOCLK9,     "gpioclk9",     "pclk",         CLK_SET_RATE_PARENT, 0x20, 17, 0, },
149 	{ HI3620_GPIOCLK10,    "gpioclk10",    "pclk",         CLK_SET_RATE_PARENT, 0x20, 18, 0, },
150 	{ HI3620_GPIOCLK11,    "gpioclk11",    "pclk",         CLK_SET_RATE_PARENT, 0x20, 19, 0, },
151 	{ HI3620_GPIOCLK12,    "gpioclk12",    "pclk",         CLK_SET_RATE_PARENT, 0x20, 20, 0, },
152 	{ HI3620_GPIOCLK13,    "gpioclk13",    "pclk",         CLK_SET_RATE_PARENT, 0x20, 21, 0, },
153 	{ HI3620_GPIOCLK14,    "gpioclk14",    "pclk",         CLK_SET_RATE_PARENT, 0x20, 22, 0, },
154 	{ HI3620_GPIOCLK15,    "gpioclk15",    "pclk",         CLK_SET_RATE_PARENT, 0x20, 23, 0, },
155 	{ HI3620_GPIOCLK16,    "gpioclk16",    "pclk",         CLK_SET_RATE_PARENT, 0x20, 24, 0, },
156 	{ HI3620_GPIOCLK17,    "gpioclk17",    "pclk",         CLK_SET_RATE_PARENT, 0x20, 25, 0, },
157 	{ HI3620_GPIOCLK18,    "gpioclk18",    "pclk",         CLK_SET_RATE_PARENT, 0x20, 26, 0, },
158 	{ HI3620_GPIOCLK19,    "gpioclk19",    "pclk",         CLK_SET_RATE_PARENT, 0x20, 27, 0, },
159 	{ HI3620_GPIOCLK20,    "gpioclk20",    "pclk",         CLK_SET_RATE_PARENT, 0x20, 28, 0, },
160 	{ HI3620_GPIOCLK21,    "gpioclk21",    "pclk",         CLK_SET_RATE_PARENT, 0x20, 29, 0, },
161 	{ HI3620_DPHY0_CLK,    "dphy0_clk",    "osc26m",       CLK_SET_RATE_PARENT, 0x30, 15, 0, },
162 	{ HI3620_DPHY1_CLK,    "dphy1_clk",    "osc26m",       CLK_SET_RATE_PARENT, 0x30, 16, 0, },
163 	{ HI3620_DPHY2_CLK,    "dphy2_clk",    "osc26m",       CLK_SET_RATE_PARENT, 0x30, 17, 0, },
164 	{ HI3620_USBPHY_CLK,   "usbphy_clk",   "rclk_pico",    CLK_SET_RATE_PARENT, 0x30, 24, 0, },
165 	{ HI3620_ACP_CLK,      "acp_clk",      "rclk_cfgaxi",  CLK_SET_RATE_PARENT, 0x30, 28, 0, },
166 	{ HI3620_TIMERCLK45,   "timerclk45",   "rclk_tcxo",    CLK_SET_RATE_PARENT, 0x40, 3, 0, },
167 	{ HI3620_TIMERCLK67,   "timerclk67",   "rclk_tcxo",    CLK_SET_RATE_PARENT, 0x40, 4, 0, },
168 	{ HI3620_TIMERCLK89,   "timerclk89",   "rclk_tcxo",    CLK_SET_RATE_PARENT, 0x40, 5, 0, },
169 	{ HI3620_PWMCLK0,      "pwmclk0",      "pwm0_mux",     CLK_SET_RATE_PARENT, 0x40, 7, 0, },
170 	{ HI3620_PWMCLK1,      "pwmclk1",      "pwm1_mux",     CLK_SET_RATE_PARENT, 0x40, 8, 0, },
171 	{ HI3620_UARTCLK0,     "uartclk0",     "uart0_mux",    CLK_SET_RATE_PARENT, 0x40, 16, 0, },
172 	{ HI3620_UARTCLK1,     "uartclk1",     "uart1_mux",    CLK_SET_RATE_PARENT, 0x40, 17, 0, },
173 	{ HI3620_UARTCLK2,     "uartclk2",     "uart2_mux",    CLK_SET_RATE_PARENT, 0x40, 18, 0, },
174 	{ HI3620_UARTCLK3,     "uartclk3",     "uart3_mux",    CLK_SET_RATE_PARENT, 0x40, 19, 0, },
175 	{ HI3620_UARTCLK4,     "uartclk4",     "uart4_mux",    CLK_SET_RATE_PARENT, 0x40, 20, 0, },
176 	{ HI3620_SPICLK0,      "spiclk0",      "spi0_mux",     CLK_SET_RATE_PARENT, 0x40, 21, 0, },
177 	{ HI3620_SPICLK1,      "spiclk1",      "spi1_mux",     CLK_SET_RATE_PARENT, 0x40, 22, 0, },
178 	{ HI3620_SPICLK2,      "spiclk2",      "spi2_mux",     CLK_SET_RATE_PARENT, 0x40, 23, 0, },
179 	{ HI3620_I2CCLK0,      "i2cclk0",      "pclk",         CLK_SET_RATE_PARENT, 0x40, 24, 0, },
180 	{ HI3620_I2CCLK1,      "i2cclk1",      "pclk",         CLK_SET_RATE_PARENT, 0x40, 25, 0, },
181 	{ HI3620_SCI_CLK,      "sci_clk",      "osc26m",       CLK_SET_RATE_PARENT, 0x40, 26, 0, },
182 	{ HI3620_I2CCLK2,      "i2cclk2",      "pclk",         CLK_SET_RATE_PARENT, 0x40, 28, 0, },
183 	{ HI3620_I2CCLK3,      "i2cclk3",      "pclk",         CLK_SET_RATE_PARENT, 0x40, 29, 0, },
184 	{ HI3620_DDRC_PER_CLK, "ddrc_per_clk", "rclk_cfgaxi",  CLK_SET_RATE_PARENT, 0x50, 9, 0, },
185 	{ HI3620_DMAC_CLK,     "dmac_clk",     "rclk_cfgaxi",  CLK_SET_RATE_PARENT, 0x50, 10, 0, },
186 	{ HI3620_USB2DVC_CLK,  "usb2dvc_clk",  "rclk_cfgaxi",  CLK_SET_RATE_PARENT, 0x50, 17, 0, },
187 	{ HI3620_SD_CLK,       "sd_clk",       "sd_div",       CLK_SET_RATE_PARENT, 0x50, 20, 0, },
188 	{ HI3620_MMC_CLK1,     "mmc_clk1",     "mmc1_mux2",    CLK_SET_RATE_PARENT, 0x50, 21, 0, },
189 	{ HI3620_MMC_CLK2,     "mmc_clk2",     "mmc2_div",     CLK_SET_RATE_PARENT, 0x50, 22, 0, },
190 	{ HI3620_MMC_CLK3,     "mmc_clk3",     "mmc3_div",     CLK_SET_RATE_PARENT, 0x50, 23, 0, },
191 	{ HI3620_MCU_CLK,      "mcu_clk",      "acp_clk",      CLK_SET_RATE_PARENT, 0x50, 24, 0, },
192 };
193 
hi3620_clk_init(struct device_node * np)194 static void __init hi3620_clk_init(struct device_node *np)
195 {
196 	struct hisi_clock_data *clk_data;
197 
198 	clk_data = hisi_clk_init(np, HI3620_NR_CLKS);
199 	if (!clk_data)
200 		return;
201 
202 	hisi_clk_register_fixed_rate(hi3620_fixed_rate_clks,
203 				     ARRAY_SIZE(hi3620_fixed_rate_clks),
204 				     clk_data);
205 	hisi_clk_register_fixed_factor(hi3620_fixed_factor_clks,
206 				       ARRAY_SIZE(hi3620_fixed_factor_clks),
207 				       clk_data);
208 	hisi_clk_register_mux(hi3620_mux_clks, ARRAY_SIZE(hi3620_mux_clks),
209 			      clk_data);
210 	hisi_clk_register_divider(hi3620_div_clks, ARRAY_SIZE(hi3620_div_clks),
211 				  clk_data);
212 	hisi_clk_register_gate_sep(hi3620_separated_gate_clks,
213 				   ARRAY_SIZE(hi3620_separated_gate_clks),
214 				   clk_data);
215 }
216 CLK_OF_DECLARE(hi3620_clk, "hisilicon,hi3620-clock", hi3620_clk_init);
217 
218 struct hisi_mmc_clock {
219 	unsigned int		id;
220 	const char		*name;
221 	const char		*parent_name;
222 	unsigned long		flags;
223 	u32			clken_reg;
224 	u32			clken_bit;
225 	u32			div_reg;
226 	u32			div_off;
227 	u32			div_bits;
228 	u32			drv_reg;
229 	u32			drv_off;
230 	u32			drv_bits;
231 	u32			sam_reg;
232 	u32			sam_off;
233 	u32			sam_bits;
234 };
235 
236 struct clk_mmc {
237 	struct clk_hw	hw;
238 	u32		id;
239 	void __iomem	*clken_reg;
240 	u32		clken_bit;
241 	void __iomem	*div_reg;
242 	u32		div_off;
243 	u32		div_bits;
244 	void __iomem	*drv_reg;
245 	u32		drv_off;
246 	u32		drv_bits;
247 	void __iomem	*sam_reg;
248 	u32		sam_off;
249 	u32		sam_bits;
250 };
251 
252 #define to_mmc(_hw) container_of(_hw, struct clk_mmc, hw)
253 
254 static struct hisi_mmc_clock hi3620_mmc_clks[] __initdata = {
255 	{ HI3620_SD_CIUCLK,	"sd_bclk1", "sd_clk", CLK_SET_RATE_PARENT, 0x1f8, 0, 0x1f8, 1, 3, 0x1f8, 4, 4, 0x1f8, 8, 4},
256 	{ HI3620_MMC_CIUCLK1,   "mmc_bclk1", "mmc_clk1", CLK_SET_RATE_PARENT, 0x1f8, 12, 0x1f8, 13, 3, 0x1f8, 16, 4, 0x1f8, 20, 4},
257 	{ HI3620_MMC_CIUCLK2,   "mmc_bclk2", "mmc_clk2", CLK_SET_RATE_PARENT, 0x1f8, 24, 0x1f8, 25, 3, 0x1f8, 28, 4, 0x1fc, 0, 4},
258 	{ HI3620_MMC_CIUCLK3,   "mmc_bclk3", "mmc_clk3", CLK_SET_RATE_PARENT, 0x1fc, 4, 0x1fc, 5, 3, 0x1fc, 8, 4, 0x1fc, 12, 4},
259 };
260 
mmc_clk_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)261 static unsigned long mmc_clk_recalc_rate(struct clk_hw *hw,
262 		       unsigned long parent_rate)
263 {
264 	switch (parent_rate) {
265 	case 26000000:
266 		return 13000000;
267 	case 180000000:
268 		return 25000000;
269 	case 360000000:
270 		return 50000000;
271 	case 720000000:
272 		return 100000000;
273 	case 1440000000:
274 		return 180000000;
275 	default:
276 		return parent_rate;
277 	}
278 }
279 
mmc_clk_determine_rate(struct clk_hw * hw,struct clk_rate_request * req)280 static int mmc_clk_determine_rate(struct clk_hw *hw,
281 				  struct clk_rate_request *req)
282 {
283 	struct clk_mmc *mclk = to_mmc(hw);
284 
285 	if ((req->rate <= 13000000) && (mclk->id == HI3620_MMC_CIUCLK1)) {
286 		req->rate = 13000000;
287 		req->best_parent_rate = 26000000;
288 	} else if (req->rate <= 26000000) {
289 		req->rate = 25000000;
290 		req->best_parent_rate = 180000000;
291 	} else if (req->rate <= 52000000) {
292 		req->rate = 50000000;
293 		req->best_parent_rate = 360000000;
294 	} else if (req->rate <= 100000000) {
295 		req->rate = 100000000;
296 		req->best_parent_rate = 720000000;
297 	} else {
298 		/* max is 180M */
299 		req->rate = 180000000;
300 		req->best_parent_rate = 1440000000;
301 	}
302 	return -EINVAL;
303 }
304 
mmc_clk_delay(u32 val,u32 para,u32 off,u32 len)305 static u32 mmc_clk_delay(u32 val, u32 para, u32 off, u32 len)
306 {
307 	u32 i;
308 
309 	for (i = 0; i < len; i++) {
310 		if (para % 2)
311 			val |= 1 << (off + i);
312 		else
313 			val &= ~(1 << (off + i));
314 		para = para >> 1;
315 	}
316 
317 	return val;
318 }
319 
mmc_clk_set_timing(struct clk_hw * hw,unsigned long rate)320 static int mmc_clk_set_timing(struct clk_hw *hw, unsigned long rate)
321 {
322 	struct clk_mmc *mclk = to_mmc(hw);
323 	unsigned long flags;
324 	u32 sam, drv, div, val;
325 	static DEFINE_SPINLOCK(mmc_clk_lock);
326 
327 	switch (rate) {
328 	case 13000000:
329 		sam = 3;
330 		drv = 1;
331 		div = 1;
332 		break;
333 	case 25000000:
334 		sam = 13;
335 		drv = 6;
336 		div = 6;
337 		break;
338 	case 50000000:
339 		sam = 3;
340 		drv = 6;
341 		div = 6;
342 		break;
343 	case 100000000:
344 		sam = 6;
345 		drv = 4;
346 		div = 6;
347 		break;
348 	case 180000000:
349 		sam = 6;
350 		drv = 4;
351 		div = 7;
352 		break;
353 	default:
354 		return -EINVAL;
355 	}
356 
357 	spin_lock_irqsave(&mmc_clk_lock, flags);
358 
359 	val = readl_relaxed(mclk->clken_reg);
360 	val &= ~(1 << mclk->clken_bit);
361 	writel_relaxed(val, mclk->clken_reg);
362 
363 	val = readl_relaxed(mclk->sam_reg);
364 	val = mmc_clk_delay(val, sam, mclk->sam_off, mclk->sam_bits);
365 	writel_relaxed(val, mclk->sam_reg);
366 
367 	val = readl_relaxed(mclk->drv_reg);
368 	val = mmc_clk_delay(val, drv, mclk->drv_off, mclk->drv_bits);
369 	writel_relaxed(val, mclk->drv_reg);
370 
371 	val = readl_relaxed(mclk->div_reg);
372 	val = mmc_clk_delay(val, div, mclk->div_off, mclk->div_bits);
373 	writel_relaxed(val, mclk->div_reg);
374 
375 	val = readl_relaxed(mclk->clken_reg);
376 	val |= 1 << mclk->clken_bit;
377 	writel_relaxed(val, mclk->clken_reg);
378 
379 	spin_unlock_irqrestore(&mmc_clk_lock, flags);
380 
381 	return 0;
382 }
383 
mmc_clk_prepare(struct clk_hw * hw)384 static int mmc_clk_prepare(struct clk_hw *hw)
385 {
386 	struct clk_mmc *mclk = to_mmc(hw);
387 	unsigned long rate;
388 
389 	if (mclk->id == HI3620_MMC_CIUCLK1)
390 		rate = 13000000;
391 	else
392 		rate = 25000000;
393 
394 	return mmc_clk_set_timing(hw, rate);
395 }
396 
mmc_clk_set_rate(struct clk_hw * hw,unsigned long rate,unsigned long parent_rate)397 static int mmc_clk_set_rate(struct clk_hw *hw, unsigned long rate,
398 			     unsigned long parent_rate)
399 {
400 	return mmc_clk_set_timing(hw, rate);
401 }
402 
403 static const struct clk_ops clk_mmc_ops = {
404 	.prepare = mmc_clk_prepare,
405 	.determine_rate = mmc_clk_determine_rate,
406 	.set_rate = mmc_clk_set_rate,
407 	.recalc_rate = mmc_clk_recalc_rate,
408 };
409 
hisi_register_clk_mmc(struct hisi_mmc_clock * mmc_clk,void __iomem * base,struct device_node * np)410 static struct clk *hisi_register_clk_mmc(struct hisi_mmc_clock *mmc_clk,
411 			void __iomem *base, struct device_node *np)
412 {
413 	struct clk_mmc *mclk;
414 	struct clk *clk;
415 	struct clk_init_data init;
416 
417 	mclk = kzalloc(sizeof(*mclk), GFP_KERNEL);
418 	if (!mclk)
419 		return ERR_PTR(-ENOMEM);
420 
421 	init.name = mmc_clk->name;
422 	init.ops = &clk_mmc_ops;
423 	init.flags = mmc_clk->flags;
424 	init.parent_names = (mmc_clk->parent_name ? &mmc_clk->parent_name : NULL);
425 	init.num_parents = (mmc_clk->parent_name ? 1 : 0);
426 	mclk->hw.init = &init;
427 
428 	mclk->id = mmc_clk->id;
429 	mclk->clken_reg = base + mmc_clk->clken_reg;
430 	mclk->clken_bit = mmc_clk->clken_bit;
431 	mclk->div_reg = base + mmc_clk->div_reg;
432 	mclk->div_off = mmc_clk->div_off;
433 	mclk->div_bits = mmc_clk->div_bits;
434 	mclk->drv_reg = base + mmc_clk->drv_reg;
435 	mclk->drv_off = mmc_clk->drv_off;
436 	mclk->drv_bits = mmc_clk->drv_bits;
437 	mclk->sam_reg = base + mmc_clk->sam_reg;
438 	mclk->sam_off = mmc_clk->sam_off;
439 	mclk->sam_bits = mmc_clk->sam_bits;
440 
441 	clk = clk_register(NULL, &mclk->hw);
442 	if (WARN_ON(IS_ERR(clk)))
443 		kfree(mclk);
444 	return clk;
445 }
446 
hi3620_mmc_clk_init(struct device_node * node)447 static void __init hi3620_mmc_clk_init(struct device_node *node)
448 {
449 	void __iomem *base;
450 	int i, num = ARRAY_SIZE(hi3620_mmc_clks);
451 	struct clk_onecell_data *clk_data;
452 
453 	if (!node) {
454 		pr_err("failed to find pctrl node in DTS\n");
455 		return;
456 	}
457 
458 	base = of_iomap(node, 0);
459 	if (!base) {
460 		pr_err("failed to map pctrl\n");
461 		return;
462 	}
463 
464 	clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
465 	if (WARN_ON(!clk_data))
466 		return;
467 
468 	clk_data->clks = kcalloc(num, sizeof(*clk_data->clks), GFP_KERNEL);
469 	if (!clk_data->clks) {
470 		kfree(clk_data);
471 		return;
472 	}
473 
474 	for (i = 0; i < num; i++) {
475 		struct hisi_mmc_clock *mmc_clk = &hi3620_mmc_clks[i];
476 		clk_data->clks[mmc_clk->id] =
477 			hisi_register_clk_mmc(mmc_clk, base, node);
478 	}
479 
480 	clk_data->clk_num = num;
481 	of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
482 }
483 
484 CLK_OF_DECLARE(hi3620_mmc_clk, "hisilicon,hi3620-mmc-clock", hi3620_mmc_clk_init);
485