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Merge branch 'parisc-4.6-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
[deliverable/linux.git] / drivers / clk / hisilicon / clk-hi3620.c
1 /*
2 * Hisilicon Hi3620 clock driver
3 *
4 * Copyright (c) 2012-2013 Hisilicon Limited.
5 * Copyright (c) 2012-2013 Linaro Limited.
6 *
7 * Author: Haojian Zhuang <haojian.zhuang@linaro.org>
8 * Xin Li <li.xin@linaro.org>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 *
24 */
25
26 #include <linux/kernel.h>
27 #include <linux/clk-provider.h>
28 #include <linux/io.h>
29 #include <linux/of.h>
30 #include <linux/of_address.h>
31 #include <linux/of_device.h>
32 #include <linux/slab.h>
33
34 #include <dt-bindings/clock/hi3620-clock.h>
35
36 #include "clk.h"
37
38 /* clock parent list */
39 static const char *const timer0_mux_p[] __initconst = { "osc32k", "timerclk01", };
40 static const char *const timer1_mux_p[] __initconst = { "osc32k", "timerclk01", };
41 static const char *const timer2_mux_p[] __initconst = { "osc32k", "timerclk23", };
42 static const char *const timer3_mux_p[] __initconst = { "osc32k", "timerclk23", };
43 static const char *const timer4_mux_p[] __initconst = { "osc32k", "timerclk45", };
44 static const char *const timer5_mux_p[] __initconst = { "osc32k", "timerclk45", };
45 static const char *const timer6_mux_p[] __initconst = { "osc32k", "timerclk67", };
46 static const char *const timer7_mux_p[] __initconst = { "osc32k", "timerclk67", };
47 static const char *const timer8_mux_p[] __initconst = { "osc32k", "timerclk89", };
48 static const char *const timer9_mux_p[] __initconst = { "osc32k", "timerclk89", };
49 static const char *const uart0_mux_p[] __initconst = { "osc26m", "pclk", };
50 static const char *const uart1_mux_p[] __initconst = { "osc26m", "pclk", };
51 static const char *const uart2_mux_p[] __initconst = { "osc26m", "pclk", };
52 static const char *const uart3_mux_p[] __initconst = { "osc26m", "pclk", };
53 static const char *const uart4_mux_p[] __initconst = { "osc26m", "pclk", };
54 static const char *const spi0_mux_p[] __initconst = { "osc26m", "rclk_cfgaxi", };
55 static const char *const spi1_mux_p[] __initconst = { "osc26m", "rclk_cfgaxi", };
56 static const char *const spi2_mux_p[] __initconst = { "osc26m", "rclk_cfgaxi", };
57 /* share axi parent */
58 static const char *const saxi_mux_p[] __initconst = { "armpll3", "armpll2", };
59 static const char *const pwm0_mux_p[] __initconst = { "osc32k", "osc26m", };
60 static const char *const pwm1_mux_p[] __initconst = { "osc32k", "osc26m", };
61 static const char *const sd_mux_p[] __initconst = { "armpll2", "armpll3", };
62 static const char *const mmc1_mux_p[] __initconst = { "armpll2", "armpll3", };
63 static const char *const mmc1_mux2_p[] __initconst = { "osc26m", "mmc1_div", };
64 static const char *const g2d_mux_p[] __initconst = { "armpll2", "armpll3", };
65 static const char *const venc_mux_p[] __initconst = { "armpll2", "armpll3", };
66 static const char *const vdec_mux_p[] __initconst = { "armpll2", "armpll3", };
67 static const char *const vpp_mux_p[] __initconst = { "armpll2", "armpll3", };
68 static const char *const edc0_mux_p[] __initconst = { "armpll2", "armpll3", };
69 static const char *const ldi0_mux_p[] __initconst = { "armpll2", "armpll4",
70 "armpll3", "armpll5", };
71 static const char *const edc1_mux_p[] __initconst = { "armpll2", "armpll3", };
72 static const char *const ldi1_mux_p[] __initconst = { "armpll2", "armpll4",
73 "armpll3", "armpll5", };
74 static const char *const rclk_hsic_p[] __initconst = { "armpll3", "armpll2", };
75 static const char *const mmc2_mux_p[] __initconst = { "armpll2", "armpll3", };
76 static const char *const mmc3_mux_p[] __initconst = { "armpll2", "armpll3", };
77
78
79 /* fixed rate clocks */
80 static struct hisi_fixed_rate_clock hi3620_fixed_rate_clks[] __initdata = {
81 { HI3620_OSC32K, "osc32k", NULL, 0, 32768, },
82 { HI3620_OSC26M, "osc26m", NULL, 0, 26000000, },
83 { HI3620_PCLK, "pclk", NULL, 0, 26000000, },
84 { HI3620_PLL_ARM0, "armpll0", NULL, 0, 1600000000, },
85 { HI3620_PLL_ARM1, "armpll1", NULL, 0, 1600000000, },
86 { HI3620_PLL_PERI, "armpll2", NULL, 0, 1440000000, },
87 { HI3620_PLL_USB, "armpll3", NULL, 0, 1440000000, },
88 { HI3620_PLL_HDMI, "armpll4", NULL, 0, 1188000000, },
89 { HI3620_PLL_GPU, "armpll5", NULL, 0, 1300000000, },
90 };
91
92 /* fixed factor clocks */
93 static struct hisi_fixed_factor_clock hi3620_fixed_factor_clks[] __initdata = {
94 { HI3620_RCLK_TCXO, "rclk_tcxo", "osc26m", 1, 4, 0, },
95 { HI3620_RCLK_CFGAXI, "rclk_cfgaxi", "armpll2", 1, 30, 0, },
96 { HI3620_RCLK_PICO, "rclk_pico", "hsic_div", 1, 40, 0, },
97 };
98
99 static struct hisi_mux_clock hi3620_mux_clks[] __initdata = {
100 { HI3620_TIMER0_MUX, "timer0_mux", timer0_mux_p, ARRAY_SIZE(timer0_mux_p), CLK_SET_RATE_PARENT, 0, 15, 2, 0, },
101 { HI3620_TIMER1_MUX, "timer1_mux", timer1_mux_p, ARRAY_SIZE(timer1_mux_p), CLK_SET_RATE_PARENT, 0, 17, 2, 0, },
102 { HI3620_TIMER2_MUX, "timer2_mux", timer2_mux_p, ARRAY_SIZE(timer2_mux_p), CLK_SET_RATE_PARENT, 0, 19, 2, 0, },
103 { HI3620_TIMER3_MUX, "timer3_mux", timer3_mux_p, ARRAY_SIZE(timer3_mux_p), CLK_SET_RATE_PARENT, 0, 21, 2, 0, },
104 { HI3620_TIMER4_MUX, "timer4_mux", timer4_mux_p, ARRAY_SIZE(timer4_mux_p), CLK_SET_RATE_PARENT, 0x18, 0, 2, 0, },
105 { HI3620_TIMER5_MUX, "timer5_mux", timer5_mux_p, ARRAY_SIZE(timer5_mux_p), CLK_SET_RATE_PARENT, 0x18, 2, 2, 0, },
106 { HI3620_TIMER6_MUX, "timer6_mux", timer6_mux_p, ARRAY_SIZE(timer6_mux_p), CLK_SET_RATE_PARENT, 0x18, 4, 2, 0, },
107 { HI3620_TIMER7_MUX, "timer7_mux", timer7_mux_p, ARRAY_SIZE(timer7_mux_p), CLK_SET_RATE_PARENT, 0x18, 6, 2, 0, },
108 { HI3620_TIMER8_MUX, "timer8_mux", timer8_mux_p, ARRAY_SIZE(timer8_mux_p), CLK_SET_RATE_PARENT, 0x18, 8, 2, 0, },
109 { HI3620_TIMER9_MUX, "timer9_mux", timer9_mux_p, ARRAY_SIZE(timer9_mux_p), CLK_SET_RATE_PARENT, 0x18, 10, 2, 0, },
110 { HI3620_UART0_MUX, "uart0_mux", uart0_mux_p, ARRAY_SIZE(uart0_mux_p), CLK_SET_RATE_PARENT, 0x100, 7, 1, CLK_MUX_HIWORD_MASK, },
111 { HI3620_UART1_MUX, "uart1_mux", uart1_mux_p, ARRAY_SIZE(uart1_mux_p), CLK_SET_RATE_PARENT, 0x100, 8, 1, CLK_MUX_HIWORD_MASK, },
112 { HI3620_UART2_MUX, "uart2_mux", uart2_mux_p, ARRAY_SIZE(uart2_mux_p), CLK_SET_RATE_PARENT, 0x100, 9, 1, CLK_MUX_HIWORD_MASK, },
113 { HI3620_UART3_MUX, "uart3_mux", uart3_mux_p, ARRAY_SIZE(uart3_mux_p), CLK_SET_RATE_PARENT, 0x100, 10, 1, CLK_MUX_HIWORD_MASK, },
114 { HI3620_UART4_MUX, "uart4_mux", uart4_mux_p, ARRAY_SIZE(uart4_mux_p), CLK_SET_RATE_PARENT, 0x100, 11, 1, CLK_MUX_HIWORD_MASK, },
115 { HI3620_SPI0_MUX, "spi0_mux", spi0_mux_p, ARRAY_SIZE(spi0_mux_p), CLK_SET_RATE_PARENT, 0x100, 12, 1, CLK_MUX_HIWORD_MASK, },
116 { HI3620_SPI1_MUX, "spi1_mux", spi1_mux_p, ARRAY_SIZE(spi1_mux_p), CLK_SET_RATE_PARENT, 0x100, 13, 1, CLK_MUX_HIWORD_MASK, },
117 { HI3620_SPI2_MUX, "spi2_mux", spi2_mux_p, ARRAY_SIZE(spi2_mux_p), CLK_SET_RATE_PARENT, 0x100, 14, 1, CLK_MUX_HIWORD_MASK, },
118 { HI3620_SAXI_MUX, "saxi_mux", saxi_mux_p, ARRAY_SIZE(saxi_mux_p), CLK_SET_RATE_PARENT, 0x100, 15, 1, CLK_MUX_HIWORD_MASK, },
119 { HI3620_PWM0_MUX, "pwm0_mux", pwm0_mux_p, ARRAY_SIZE(pwm0_mux_p), CLK_SET_RATE_PARENT, 0x104, 10, 1, CLK_MUX_HIWORD_MASK, },
120 { HI3620_PWM1_MUX, "pwm1_mux", pwm1_mux_p, ARRAY_SIZE(pwm1_mux_p), CLK_SET_RATE_PARENT, 0x104, 11, 1, CLK_MUX_HIWORD_MASK, },
121 { HI3620_SD_MUX, "sd_mux", sd_mux_p, ARRAY_SIZE(sd_mux_p), CLK_SET_RATE_PARENT, 0x108, 4, 1, CLK_MUX_HIWORD_MASK, },
122 { HI3620_MMC1_MUX, "mmc1_mux", mmc1_mux_p, ARRAY_SIZE(mmc1_mux_p), CLK_SET_RATE_PARENT, 0x108, 9, 1, CLK_MUX_HIWORD_MASK, },
123 { HI3620_MMC1_MUX2, "mmc1_mux2", mmc1_mux2_p, ARRAY_SIZE(mmc1_mux2_p), CLK_SET_RATE_PARENT, 0x108, 10, 1, CLK_MUX_HIWORD_MASK, },
124 { HI3620_G2D_MUX, "g2d_mux", g2d_mux_p, ARRAY_SIZE(g2d_mux_p), CLK_SET_RATE_PARENT, 0x10c, 5, 1, CLK_MUX_HIWORD_MASK, },
125 { HI3620_VENC_MUX, "venc_mux", venc_mux_p, ARRAY_SIZE(venc_mux_p), CLK_SET_RATE_PARENT, 0x10c, 11, 1, CLK_MUX_HIWORD_MASK, },
126 { HI3620_VDEC_MUX, "vdec_mux", vdec_mux_p, ARRAY_SIZE(vdec_mux_p), CLK_SET_RATE_PARENT, 0x110, 5, 1, CLK_MUX_HIWORD_MASK, },
127 { HI3620_VPP_MUX, "vpp_mux", vpp_mux_p, ARRAY_SIZE(vpp_mux_p), CLK_SET_RATE_PARENT, 0x110, 11, 1, CLK_MUX_HIWORD_MASK, },
128 { HI3620_EDC0_MUX, "edc0_mux", edc0_mux_p, ARRAY_SIZE(edc0_mux_p), CLK_SET_RATE_PARENT, 0x114, 6, 1, CLK_MUX_HIWORD_MASK, },
129 { HI3620_LDI0_MUX, "ldi0_mux", ldi0_mux_p, ARRAY_SIZE(ldi0_mux_p), CLK_SET_RATE_PARENT, 0x114, 13, 2, CLK_MUX_HIWORD_MASK, },
130 { HI3620_EDC1_MUX, "edc1_mux", edc1_mux_p, ARRAY_SIZE(edc1_mux_p), CLK_SET_RATE_PARENT, 0x118, 6, 1, CLK_MUX_HIWORD_MASK, },
131 { HI3620_LDI1_MUX, "ldi1_mux", ldi1_mux_p, ARRAY_SIZE(ldi1_mux_p), CLK_SET_RATE_PARENT, 0x118, 14, 2, CLK_MUX_HIWORD_MASK, },
132 { HI3620_RCLK_HSIC, "rclk_hsic", rclk_hsic_p, ARRAY_SIZE(rclk_hsic_p), CLK_SET_RATE_PARENT, 0x130, 2, 1, CLK_MUX_HIWORD_MASK, },
133 { HI3620_MMC2_MUX, "mmc2_mux", mmc2_mux_p, ARRAY_SIZE(mmc2_mux_p), CLK_SET_RATE_PARENT, 0x140, 4, 1, CLK_MUX_HIWORD_MASK, },
134 { HI3620_MMC3_MUX, "mmc3_mux", mmc3_mux_p, ARRAY_SIZE(mmc3_mux_p), CLK_SET_RATE_PARENT, 0x140, 9, 1, CLK_MUX_HIWORD_MASK, },
135 };
136
137 static struct hisi_divider_clock hi3620_div_clks[] __initdata = {
138 { HI3620_SHAREAXI_DIV, "saxi_div", "saxi_mux", 0, 0x100, 0, 5, CLK_DIVIDER_HIWORD_MASK, NULL, },
139 { HI3620_CFGAXI_DIV, "cfgaxi_div", "saxi_div", 0, 0x100, 5, 2, CLK_DIVIDER_HIWORD_MASK, NULL, },
140 { HI3620_SD_DIV, "sd_div", "sd_mux", 0, 0x108, 0, 4, CLK_DIVIDER_HIWORD_MASK, NULL, },
141 { HI3620_MMC1_DIV, "mmc1_div", "mmc1_mux", 0, 0x108, 5, 4, CLK_DIVIDER_HIWORD_MASK, NULL, },
142 { HI3620_HSIC_DIV, "hsic_div", "rclk_hsic", 0, 0x130, 0, 2, CLK_DIVIDER_HIWORD_MASK, NULL, },
143 { HI3620_MMC2_DIV, "mmc2_div", "mmc2_mux", 0, 0x140, 0, 4, CLK_DIVIDER_HIWORD_MASK, NULL, },
144 { HI3620_MMC3_DIV, "mmc3_div", "mmc3_mux", 0, 0x140, 5, 4, CLK_DIVIDER_HIWORD_MASK, NULL, },
145 };
146
147 static struct hisi_gate_clock hi3620_seperated_gate_clks[] __initdata = {
148 { HI3620_TIMERCLK01, "timerclk01", "timer_rclk01", CLK_SET_RATE_PARENT, 0x20, 0, 0, },
149 { HI3620_TIMER_RCLK01, "timer_rclk01", "rclk_tcxo", CLK_SET_RATE_PARENT, 0x20, 1, 0, },
150 { HI3620_TIMERCLK23, "timerclk23", "timer_rclk23", CLK_SET_RATE_PARENT, 0x20, 2, 0, },
151 { HI3620_TIMER_RCLK23, "timer_rclk23", "rclk_tcxo", CLK_SET_RATE_PARENT, 0x20, 3, 0, },
152 { HI3620_RTCCLK, "rtcclk", "pclk", CLK_SET_RATE_PARENT, 0x20, 5, 0, },
153 { HI3620_KPC_CLK, "kpc_clk", "pclk", CLK_SET_RATE_PARENT, 0x20, 6, 0, },
154 { HI3620_GPIOCLK0, "gpioclk0", "pclk", CLK_SET_RATE_PARENT, 0x20, 8, 0, },
155 { HI3620_GPIOCLK1, "gpioclk1", "pclk", CLK_SET_RATE_PARENT, 0x20, 9, 0, },
156 { HI3620_GPIOCLK2, "gpioclk2", "pclk", CLK_SET_RATE_PARENT, 0x20, 10, 0, },
157 { HI3620_GPIOCLK3, "gpioclk3", "pclk", CLK_SET_RATE_PARENT, 0x20, 11, 0, },
158 { HI3620_GPIOCLK4, "gpioclk4", "pclk", CLK_SET_RATE_PARENT, 0x20, 12, 0, },
159 { HI3620_GPIOCLK5, "gpioclk5", "pclk", CLK_SET_RATE_PARENT, 0x20, 13, 0, },
160 { HI3620_GPIOCLK6, "gpioclk6", "pclk", CLK_SET_RATE_PARENT, 0x20, 14, 0, },
161 { HI3620_GPIOCLK7, "gpioclk7", "pclk", CLK_SET_RATE_PARENT, 0x20, 15, 0, },
162 { HI3620_GPIOCLK8, "gpioclk8", "pclk", CLK_SET_RATE_PARENT, 0x20, 16, 0, },
163 { HI3620_GPIOCLK9, "gpioclk9", "pclk", CLK_SET_RATE_PARENT, 0x20, 17, 0, },
164 { HI3620_GPIOCLK10, "gpioclk10", "pclk", CLK_SET_RATE_PARENT, 0x20, 18, 0, },
165 { HI3620_GPIOCLK11, "gpioclk11", "pclk", CLK_SET_RATE_PARENT, 0x20, 19, 0, },
166 { HI3620_GPIOCLK12, "gpioclk12", "pclk", CLK_SET_RATE_PARENT, 0x20, 20, 0, },
167 { HI3620_GPIOCLK13, "gpioclk13", "pclk", CLK_SET_RATE_PARENT, 0x20, 21, 0, },
168 { HI3620_GPIOCLK14, "gpioclk14", "pclk", CLK_SET_RATE_PARENT, 0x20, 22, 0, },
169 { HI3620_GPIOCLK15, "gpioclk15", "pclk", CLK_SET_RATE_PARENT, 0x20, 23, 0, },
170 { HI3620_GPIOCLK16, "gpioclk16", "pclk", CLK_SET_RATE_PARENT, 0x20, 24, 0, },
171 { HI3620_GPIOCLK17, "gpioclk17", "pclk", CLK_SET_RATE_PARENT, 0x20, 25, 0, },
172 { HI3620_GPIOCLK18, "gpioclk18", "pclk", CLK_SET_RATE_PARENT, 0x20, 26, 0, },
173 { HI3620_GPIOCLK19, "gpioclk19", "pclk", CLK_SET_RATE_PARENT, 0x20, 27, 0, },
174 { HI3620_GPIOCLK20, "gpioclk20", "pclk", CLK_SET_RATE_PARENT, 0x20, 28, 0, },
175 { HI3620_GPIOCLK21, "gpioclk21", "pclk", CLK_SET_RATE_PARENT, 0x20, 29, 0, },
176 { HI3620_DPHY0_CLK, "dphy0_clk", "osc26m", CLK_SET_RATE_PARENT, 0x30, 15, 0, },
177 { HI3620_DPHY1_CLK, "dphy1_clk", "osc26m", CLK_SET_RATE_PARENT, 0x30, 16, 0, },
178 { HI3620_DPHY2_CLK, "dphy2_clk", "osc26m", CLK_SET_RATE_PARENT, 0x30, 17, 0, },
179 { HI3620_USBPHY_CLK, "usbphy_clk", "rclk_pico", CLK_SET_RATE_PARENT, 0x30, 24, 0, },
180 { HI3620_ACP_CLK, "acp_clk", "rclk_cfgaxi", CLK_SET_RATE_PARENT, 0x30, 28, 0, },
181 { HI3620_TIMERCLK45, "timerclk45", "rclk_tcxo", CLK_SET_RATE_PARENT, 0x40, 3, 0, },
182 { HI3620_TIMERCLK67, "timerclk67", "rclk_tcxo", CLK_SET_RATE_PARENT, 0x40, 4, 0, },
183 { HI3620_TIMERCLK89, "timerclk89", "rclk_tcxo", CLK_SET_RATE_PARENT, 0x40, 5, 0, },
184 { HI3620_PWMCLK0, "pwmclk0", "pwm0_mux", CLK_SET_RATE_PARENT, 0x40, 7, 0, },
185 { HI3620_PWMCLK1, "pwmclk1", "pwm1_mux", CLK_SET_RATE_PARENT, 0x40, 8, 0, },
186 { HI3620_UARTCLK0, "uartclk0", "uart0_mux", CLK_SET_RATE_PARENT, 0x40, 16, 0, },
187 { HI3620_UARTCLK1, "uartclk1", "uart1_mux", CLK_SET_RATE_PARENT, 0x40, 17, 0, },
188 { HI3620_UARTCLK2, "uartclk2", "uart2_mux", CLK_SET_RATE_PARENT, 0x40, 18, 0, },
189 { HI3620_UARTCLK3, "uartclk3", "uart3_mux", CLK_SET_RATE_PARENT, 0x40, 19, 0, },
190 { HI3620_UARTCLK4, "uartclk4", "uart4_mux", CLK_SET_RATE_PARENT, 0x40, 20, 0, },
191 { HI3620_SPICLK0, "spiclk0", "spi0_mux", CLK_SET_RATE_PARENT, 0x40, 21, 0, },
192 { HI3620_SPICLK1, "spiclk1", "spi1_mux", CLK_SET_RATE_PARENT, 0x40, 22, 0, },
193 { HI3620_SPICLK2, "spiclk2", "spi2_mux", CLK_SET_RATE_PARENT, 0x40, 23, 0, },
194 { HI3620_I2CCLK0, "i2cclk0", "pclk", CLK_SET_RATE_PARENT, 0x40, 24, 0, },
195 { HI3620_I2CCLK1, "i2cclk1", "pclk", CLK_SET_RATE_PARENT, 0x40, 25, 0, },
196 { HI3620_SCI_CLK, "sci_clk", "osc26m", CLK_SET_RATE_PARENT, 0x40, 26, 0, },
197 { HI3620_I2CCLK2, "i2cclk2", "pclk", CLK_SET_RATE_PARENT, 0x40, 28, 0, },
198 { HI3620_I2CCLK3, "i2cclk3", "pclk", CLK_SET_RATE_PARENT, 0x40, 29, 0, },
199 { HI3620_DDRC_PER_CLK, "ddrc_per_clk", "rclk_cfgaxi", CLK_SET_RATE_PARENT, 0x50, 9, 0, },
200 { HI3620_DMAC_CLK, "dmac_clk", "rclk_cfgaxi", CLK_SET_RATE_PARENT, 0x50, 10, 0, },
201 { HI3620_USB2DVC_CLK, "usb2dvc_clk", "rclk_cfgaxi", CLK_SET_RATE_PARENT, 0x50, 17, 0, },
202 { HI3620_SD_CLK, "sd_clk", "sd_div", CLK_SET_RATE_PARENT, 0x50, 20, 0, },
203 { HI3620_MMC_CLK1, "mmc_clk1", "mmc1_mux2", CLK_SET_RATE_PARENT, 0x50, 21, 0, },
204 { HI3620_MMC_CLK2, "mmc_clk2", "mmc2_div", CLK_SET_RATE_PARENT, 0x50, 22, 0, },
205 { HI3620_MMC_CLK3, "mmc_clk3", "mmc3_div", CLK_SET_RATE_PARENT, 0x50, 23, 0, },
206 { HI3620_MCU_CLK, "mcu_clk", "acp_clk", CLK_SET_RATE_PARENT, 0x50, 24, 0, },
207 };
208
209 static void __init hi3620_clk_init(struct device_node *np)
210 {
211 struct hisi_clock_data *clk_data;
212
213 clk_data = hisi_clk_init(np, HI3620_NR_CLKS);
214 if (!clk_data)
215 return;
216
217 hisi_clk_register_fixed_rate(hi3620_fixed_rate_clks,
218 ARRAY_SIZE(hi3620_fixed_rate_clks),
219 clk_data);
220 hisi_clk_register_fixed_factor(hi3620_fixed_factor_clks,
221 ARRAY_SIZE(hi3620_fixed_factor_clks),
222 clk_data);
223 hisi_clk_register_mux(hi3620_mux_clks, ARRAY_SIZE(hi3620_mux_clks),
224 clk_data);
225 hisi_clk_register_divider(hi3620_div_clks, ARRAY_SIZE(hi3620_div_clks),
226 clk_data);
227 hisi_clk_register_gate_sep(hi3620_seperated_gate_clks,
228 ARRAY_SIZE(hi3620_seperated_gate_clks),
229 clk_data);
230 }
231 CLK_OF_DECLARE(hi3620_clk, "hisilicon,hi3620-clock", hi3620_clk_init);
232
233 struct hisi_mmc_clock {
234 unsigned int id;
235 const char *name;
236 const char *parent_name;
237 unsigned long flags;
238 u32 clken_reg;
239 u32 clken_bit;
240 u32 div_reg;
241 u32 div_off;
242 u32 div_bits;
243 u32 drv_reg;
244 u32 drv_off;
245 u32 drv_bits;
246 u32 sam_reg;
247 u32 sam_off;
248 u32 sam_bits;
249 };
250
251 struct clk_mmc {
252 struct clk_hw hw;
253 u32 id;
254 void __iomem *clken_reg;
255 u32 clken_bit;
256 void __iomem *div_reg;
257 u32 div_off;
258 u32 div_bits;
259 void __iomem *drv_reg;
260 u32 drv_off;
261 u32 drv_bits;
262 void __iomem *sam_reg;
263 u32 sam_off;
264 u32 sam_bits;
265 };
266
267 #define to_mmc(_hw) container_of(_hw, struct clk_mmc, hw)
268
269 static struct hisi_mmc_clock hi3620_mmc_clks[] __initdata = {
270 { HI3620_SD_CIUCLK, "sd_bclk1", "sd_clk", CLK_SET_RATE_PARENT, 0x1f8, 0, 0x1f8, 1, 3, 0x1f8, 4, 4, 0x1f8, 8, 4},
271 { HI3620_MMC_CIUCLK1, "mmc_bclk1", "mmc_clk1", CLK_SET_RATE_PARENT, 0x1f8, 12, 0x1f8, 13, 3, 0x1f8, 16, 4, 0x1f8, 20, 4},
272 { HI3620_MMC_CIUCLK2, "mmc_bclk2", "mmc_clk2", CLK_SET_RATE_PARENT, 0x1f8, 24, 0x1f8, 25, 3, 0x1f8, 28, 4, 0x1fc, 0, 4},
273 { HI3620_MMC_CIUCLK3, "mmc_bclk3", "mmc_clk3", CLK_SET_RATE_PARENT, 0x1fc, 4, 0x1fc, 5, 3, 0x1fc, 8, 4, 0x1fc, 12, 4},
274 };
275
276 static unsigned long mmc_clk_recalc_rate(struct clk_hw *hw,
277 unsigned long parent_rate)
278 {
279 switch (parent_rate) {
280 case 26000000:
281 return 13000000;
282 case 180000000:
283 return 25000000;
284 case 360000000:
285 return 50000000;
286 case 720000000:
287 return 100000000;
288 case 1440000000:
289 return 180000000;
290 default:
291 return parent_rate;
292 }
293 }
294
295 static int mmc_clk_determine_rate(struct clk_hw *hw,
296 struct clk_rate_request *req)
297 {
298 struct clk_mmc *mclk = to_mmc(hw);
299
300 if ((req->rate <= 13000000) && (mclk->id == HI3620_MMC_CIUCLK1)) {
301 req->rate = 13000000;
302 req->best_parent_rate = 26000000;
303 } else if (req->rate <= 26000000) {
304 req->rate = 25000000;
305 req->best_parent_rate = 180000000;
306 } else if (req->rate <= 52000000) {
307 req->rate = 50000000;
308 req->best_parent_rate = 360000000;
309 } else if (req->rate <= 100000000) {
310 req->rate = 100000000;
311 req->best_parent_rate = 720000000;
312 } else {
313 /* max is 180M */
314 req->rate = 180000000;
315 req->best_parent_rate = 1440000000;
316 }
317 return -EINVAL;
318 }
319
320 static u32 mmc_clk_delay(u32 val, u32 para, u32 off, u32 len)
321 {
322 u32 i;
323
324 for (i = 0; i < len; i++) {
325 if (para % 2)
326 val |= 1 << (off + i);
327 else
328 val &= ~(1 << (off + i));
329 para = para >> 1;
330 }
331
332 return val;
333 }
334
335 static int mmc_clk_set_timing(struct clk_hw *hw, unsigned long rate)
336 {
337 struct clk_mmc *mclk = to_mmc(hw);
338 unsigned long flags;
339 u32 sam, drv, div, val;
340 static DEFINE_SPINLOCK(mmc_clk_lock);
341
342 switch (rate) {
343 case 13000000:
344 sam = 3;
345 drv = 1;
346 div = 1;
347 break;
348 case 25000000:
349 sam = 13;
350 drv = 6;
351 div = 6;
352 break;
353 case 50000000:
354 sam = 3;
355 drv = 6;
356 div = 6;
357 break;
358 case 100000000:
359 sam = 6;
360 drv = 4;
361 div = 6;
362 break;
363 case 180000000:
364 sam = 6;
365 drv = 4;
366 div = 7;
367 break;
368 default:
369 return -EINVAL;
370 }
371
372 spin_lock_irqsave(&mmc_clk_lock, flags);
373
374 val = readl_relaxed(mclk->clken_reg);
375 val &= ~(1 << mclk->clken_bit);
376 writel_relaxed(val, mclk->clken_reg);
377
378 val = readl_relaxed(mclk->sam_reg);
379 val = mmc_clk_delay(val, sam, mclk->sam_off, mclk->sam_bits);
380 writel_relaxed(val, mclk->sam_reg);
381
382 val = readl_relaxed(mclk->drv_reg);
383 val = mmc_clk_delay(val, drv, mclk->drv_off, mclk->drv_bits);
384 writel_relaxed(val, mclk->drv_reg);
385
386 val = readl_relaxed(mclk->div_reg);
387 val = mmc_clk_delay(val, div, mclk->div_off, mclk->div_bits);
388 writel_relaxed(val, mclk->div_reg);
389
390 val = readl_relaxed(mclk->clken_reg);
391 val |= 1 << mclk->clken_bit;
392 writel_relaxed(val, mclk->clken_reg);
393
394 spin_unlock_irqrestore(&mmc_clk_lock, flags);
395
396 return 0;
397 }
398
399 static int mmc_clk_prepare(struct clk_hw *hw)
400 {
401 struct clk_mmc *mclk = to_mmc(hw);
402 unsigned long rate;
403
404 if (mclk->id == HI3620_MMC_CIUCLK1)
405 rate = 13000000;
406 else
407 rate = 25000000;
408
409 return mmc_clk_set_timing(hw, rate);
410 }
411
412 static int mmc_clk_set_rate(struct clk_hw *hw, unsigned long rate,
413 unsigned long parent_rate)
414 {
415 return mmc_clk_set_timing(hw, rate);
416 }
417
418 static struct clk_ops clk_mmc_ops = {
419 .prepare = mmc_clk_prepare,
420 .determine_rate = mmc_clk_determine_rate,
421 .set_rate = mmc_clk_set_rate,
422 .recalc_rate = mmc_clk_recalc_rate,
423 };
424
425 static struct clk *hisi_register_clk_mmc(struct hisi_mmc_clock *mmc_clk,
426 void __iomem *base, struct device_node *np)
427 {
428 struct clk_mmc *mclk;
429 struct clk *clk;
430 struct clk_init_data init;
431
432 mclk = kzalloc(sizeof(*mclk), GFP_KERNEL);
433 if (!mclk) {
434 pr_err("%s: fail to allocate mmc clk\n", __func__);
435 return ERR_PTR(-ENOMEM);
436 }
437
438 init.name = mmc_clk->name;
439 init.ops = &clk_mmc_ops;
440 init.flags = mmc_clk->flags | CLK_IS_BASIC;
441 init.parent_names = (mmc_clk->parent_name ? &mmc_clk->parent_name : NULL);
442 init.num_parents = (mmc_clk->parent_name ? 1 : 0);
443 mclk->hw.init = &init;
444
445 mclk->id = mmc_clk->id;
446 mclk->clken_reg = base + mmc_clk->clken_reg;
447 mclk->clken_bit = mmc_clk->clken_bit;
448 mclk->div_reg = base + mmc_clk->div_reg;
449 mclk->div_off = mmc_clk->div_off;
450 mclk->div_bits = mmc_clk->div_bits;
451 mclk->drv_reg = base + mmc_clk->drv_reg;
452 mclk->drv_off = mmc_clk->drv_off;
453 mclk->drv_bits = mmc_clk->drv_bits;
454 mclk->sam_reg = base + mmc_clk->sam_reg;
455 mclk->sam_off = mmc_clk->sam_off;
456 mclk->sam_bits = mmc_clk->sam_bits;
457
458 clk = clk_register(NULL, &mclk->hw);
459 if (WARN_ON(IS_ERR(clk)))
460 kfree(mclk);
461 return clk;
462 }
463
464 static void __init hi3620_mmc_clk_init(struct device_node *node)
465 {
466 void __iomem *base;
467 int i, num = ARRAY_SIZE(hi3620_mmc_clks);
468 struct clk_onecell_data *clk_data;
469
470 if (!node) {
471 pr_err("failed to find pctrl node in DTS\n");
472 return;
473 }
474
475 base = of_iomap(node, 0);
476 if (!base) {
477 pr_err("failed to map pctrl\n");
478 return;
479 }
480
481 clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
482 if (WARN_ON(!clk_data))
483 return;
484
485 clk_data->clks = kzalloc(sizeof(struct clk *) * num, GFP_KERNEL);
486 if (!clk_data->clks) {
487 pr_err("%s: fail to allocate mmc clk\n", __func__);
488 return;
489 }
490
491 for (i = 0; i < num; i++) {
492 struct hisi_mmc_clock *mmc_clk = &hi3620_mmc_clks[i];
493 clk_data->clks[mmc_clk->id] =
494 hisi_register_clk_mmc(mmc_clk, base, node);
495 }
496
497 clk_data->clk_num = num;
498 of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
499 }
500
501 CLK_OF_DECLARE(hi3620_mmc_clk, "hisilicon,hi3620-mmc-clock", hi3620_mmc_clk_init);
Linux kernel - Deliverables
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