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/clkdev.h> 29 #include <linux/io.h> 30 #include <linux/of.h> 31 #include <linux/of_address.h> 32 #include <linux/of_device.h> 33 #include <linux/slab.h> 34 #include <linux/clk.h> 35 36 #include <dt-bindings/clock/hi3620-clock.h> 37 38 #include "clk.h" 39 40 /* clock parent list */ 41 static const char *timer0_mux_p[] __initconst = { "osc32k", "timerclk01", }; 42 static const char *timer1_mux_p[] __initconst = { "osc32k", "timerclk01", }; 43 static const char *timer2_mux_p[] __initconst = { "osc32k", "timerclk23", }; 44 static const char *timer3_mux_p[] __initconst = { "osc32k", "timerclk23", }; 45 static const char *timer4_mux_p[] __initconst = { "osc32k", "timerclk45", }; 46 static const char *timer5_mux_p[] __initconst = { "osc32k", "timerclk45", }; 47 static const char *timer6_mux_p[] __initconst = { "osc32k", "timerclk67", }; 48 static const char *timer7_mux_p[] __initconst = { "osc32k", "timerclk67", }; 49 static const char *timer8_mux_p[] __initconst = { "osc32k", "timerclk89", }; 50 static const char *timer9_mux_p[] __initconst = { "osc32k", "timerclk89", }; 51 static const char *uart0_mux_p[] __initconst = { "osc26m", "pclk", }; 52 static const char *uart1_mux_p[] __initconst = { "osc26m", "pclk", }; 53 static const char *uart2_mux_p[] __initconst = { "osc26m", "pclk", }; 54 static const char *uart3_mux_p[] __initconst = { "osc26m", "pclk", }; 55 static const char *uart4_mux_p[] __initconst = { "osc26m", "pclk", }; 56 static const char *spi0_mux_p[] __initconst = { "osc26m", "rclk_cfgaxi", }; 57 static const char *spi1_mux_p[] __initconst = { "osc26m", "rclk_cfgaxi", }; 58 static const char *spi2_mux_p[] __initconst = { "osc26m", "rclk_cfgaxi", }; 59 /* share axi parent */ 60 static const char *saxi_mux_p[] __initconst = { "armpll3", "armpll2", }; 61 static const char *pwm0_mux_p[] __initconst = { "osc32k", "osc26m", }; 62 static const char *pwm1_mux_p[] __initconst = { "osc32k", "osc26m", }; 63 static const char *sd_mux_p[] __initconst = { "armpll2", "armpll3", }; 64 static const char *mmc1_mux_p[] __initconst = { "armpll2", "armpll3", }; 65 static const char *mmc1_mux2_p[] __initconst = { "osc26m", "mmc1_div", }; 66 static const char *g2d_mux_p[] __initconst = { "armpll2", "armpll3", }; 67 static const char *venc_mux_p[] __initconst = { "armpll2", "armpll3", }; 68 static const char *vdec_mux_p[] __initconst = { "armpll2", "armpll3", }; 69 static const char *vpp_mux_p[] __initconst = { "armpll2", "armpll3", }; 70 static const char *edc0_mux_p[] __initconst = { "armpll2", "armpll3", }; 71 static const char *ldi0_mux_p[] __initconst = { "armpll2", "armpll4", 72 "armpll3", "armpll5", }; 73 static const char *edc1_mux_p[] __initconst = { "armpll2", "armpll3", }; 74 static const char *ldi1_mux_p[] __initconst = { "armpll2", "armpll4", 75 "armpll3", "armpll5", }; 76 static const char *rclk_hsic_p[] __initconst = { "armpll3", "armpll2", }; 77 static const char *mmc2_mux_p[] __initconst = { "armpll2", "armpll3", }; 78 static const char *mmc3_mux_p[] __initconst = { "armpll2", "armpll3", }; 79 80 81 /* fixed rate clocks */ 82 static struct hisi_fixed_rate_clock hi3620_fixed_rate_clks[] __initdata = { 83 { HI3620_OSC32K, "osc32k", NULL, CLK_IS_ROOT, 32768, }, 84 { HI3620_OSC26M, "osc26m", NULL, CLK_IS_ROOT, 26000000, }, 85 { HI3620_PCLK, "pclk", NULL, CLK_IS_ROOT, 26000000, }, 86 { HI3620_PLL_ARM0, "armpll0", NULL, CLK_IS_ROOT, 1600000000, }, 87 { HI3620_PLL_ARM1, "armpll1", NULL, CLK_IS_ROOT, 1600000000, }, 88 { HI3620_PLL_PERI, "armpll2", NULL, CLK_IS_ROOT, 1440000000, }, 89 { HI3620_PLL_USB, "armpll3", NULL, CLK_IS_ROOT, 1440000000, }, 90 { HI3620_PLL_HDMI, "armpll4", NULL, CLK_IS_ROOT, 1188000000, }, 91 { HI3620_PLL_GPU, "armpll5", NULL, CLK_IS_ROOT, 1300000000, }, 92 }; 93 94 /* fixed factor clocks */ 95 static struct hisi_fixed_factor_clock hi3620_fixed_factor_clks[] __initdata = { 96 { HI3620_RCLK_TCXO, "rclk_tcxo", "osc26m", 1, 4, 0, }, 97 { HI3620_RCLK_CFGAXI, "rclk_cfgaxi", "armpll2", 1, 30, 0, }, 98 { HI3620_RCLK_PICO, "rclk_pico", "hsic_div", 1, 40, 0, }, 99 }; 100 101 static struct hisi_mux_clock hi3620_mux_clks[] __initdata = { 102 { HI3620_TIMER0_MUX, "timer0_mux", timer0_mux_p, ARRAY_SIZE(timer0_mux_p), CLK_SET_RATE_PARENT, 0, 15, 2, 0, }, 103 { HI3620_TIMER1_MUX, "timer1_mux", timer1_mux_p, ARRAY_SIZE(timer1_mux_p), CLK_SET_RATE_PARENT, 0, 17, 2, 0, }, 104 { HI3620_TIMER2_MUX, "timer2_mux", timer2_mux_p, ARRAY_SIZE(timer2_mux_p), CLK_SET_RATE_PARENT, 0, 19, 2, 0, }, 105 { HI3620_TIMER3_MUX, "timer3_mux", timer3_mux_p, ARRAY_SIZE(timer3_mux_p), CLK_SET_RATE_PARENT, 0, 21, 2, 0, }, 106 { HI3620_TIMER4_MUX, "timer4_mux", timer4_mux_p, ARRAY_SIZE(timer4_mux_p), CLK_SET_RATE_PARENT, 0x18, 0, 2, 0, }, 107 { HI3620_TIMER5_MUX, "timer5_mux", timer5_mux_p, ARRAY_SIZE(timer5_mux_p), CLK_SET_RATE_PARENT, 0x18, 2, 2, 0, }, 108 { HI3620_TIMER6_MUX, "timer6_mux", timer6_mux_p, ARRAY_SIZE(timer6_mux_p), CLK_SET_RATE_PARENT, 0x18, 4, 2, 0, }, 109 { HI3620_TIMER7_MUX, "timer7_mux", timer7_mux_p, ARRAY_SIZE(timer7_mux_p), CLK_SET_RATE_PARENT, 0x18, 6, 2, 0, }, 110 { HI3620_TIMER8_MUX, "timer8_mux", timer8_mux_p, ARRAY_SIZE(timer8_mux_p), CLK_SET_RATE_PARENT, 0x18, 8, 2, 0, }, 111 { HI3620_TIMER9_MUX, "timer9_mux", timer9_mux_p, ARRAY_SIZE(timer9_mux_p), CLK_SET_RATE_PARENT, 0x18, 10, 2, 0, }, 112 { HI3620_UART0_MUX, "uart0_mux", uart0_mux_p, ARRAY_SIZE(uart0_mux_p), CLK_SET_RATE_PARENT, 0x100, 7, 1, CLK_MUX_HIWORD_MASK, }, 113 { HI3620_UART1_MUX, "uart1_mux", uart1_mux_p, ARRAY_SIZE(uart1_mux_p), CLK_SET_RATE_PARENT, 0x100, 8, 1, CLK_MUX_HIWORD_MASK, }, 114 { HI3620_UART2_MUX, "uart2_mux", uart2_mux_p, ARRAY_SIZE(uart2_mux_p), CLK_SET_RATE_PARENT, 0x100, 9, 1, CLK_MUX_HIWORD_MASK, }, 115 { HI3620_UART3_MUX, "uart3_mux", uart3_mux_p, ARRAY_SIZE(uart3_mux_p), CLK_SET_RATE_PARENT, 0x100, 10, 1, CLK_MUX_HIWORD_MASK, }, 116 { HI3620_UART4_MUX, "uart4_mux", uart4_mux_p, ARRAY_SIZE(uart4_mux_p), CLK_SET_RATE_PARENT, 0x100, 11, 1, CLK_MUX_HIWORD_MASK, }, 117 { HI3620_SPI0_MUX, "spi0_mux", spi0_mux_p, ARRAY_SIZE(spi0_mux_p), CLK_SET_RATE_PARENT, 0x100, 12, 1, CLK_MUX_HIWORD_MASK, }, 118 { HI3620_SPI1_MUX, "spi1_mux", spi1_mux_p, ARRAY_SIZE(spi1_mux_p), CLK_SET_RATE_PARENT, 0x100, 13, 1, CLK_MUX_HIWORD_MASK, }, 119 { HI3620_SPI2_MUX, "spi2_mux", spi2_mux_p, ARRAY_SIZE(spi2_mux_p), CLK_SET_RATE_PARENT, 0x100, 14, 1, CLK_MUX_HIWORD_MASK, }, 120 { HI3620_SAXI_MUX, "saxi_mux", saxi_mux_p, ARRAY_SIZE(saxi_mux_p), CLK_SET_RATE_PARENT, 0x100, 15, 1, CLK_MUX_HIWORD_MASK, }, 121 { HI3620_PWM0_MUX, "pwm0_mux", pwm0_mux_p, ARRAY_SIZE(pwm0_mux_p), CLK_SET_RATE_PARENT, 0x104, 10, 1, CLK_MUX_HIWORD_MASK, }, 122 { HI3620_PWM1_MUX, "pwm1_mux", pwm1_mux_p, ARRAY_SIZE(pwm1_mux_p), CLK_SET_RATE_PARENT, 0x104, 11, 1, CLK_MUX_HIWORD_MASK, }, 123 { HI3620_SD_MUX, "sd_mux", sd_mux_p, ARRAY_SIZE(sd_mux_p), CLK_SET_RATE_PARENT, 0x108, 4, 1, CLK_MUX_HIWORD_MASK, }, 124 { HI3620_MMC1_MUX, "mmc1_mux", mmc1_mux_p, ARRAY_SIZE(mmc1_mux_p), CLK_SET_RATE_PARENT, 0x108, 9, 1, CLK_MUX_HIWORD_MASK, }, 125 { HI3620_MMC1_MUX2, "mmc1_mux2", mmc1_mux2_p, ARRAY_SIZE(mmc1_mux2_p), CLK_SET_RATE_PARENT, 0x108, 10, 1, CLK_MUX_HIWORD_MASK, }, 126 { HI3620_G2D_MUX, "g2d_mux", g2d_mux_p, ARRAY_SIZE(g2d_mux_p), CLK_SET_RATE_PARENT, 0x10c, 5, 1, CLK_MUX_HIWORD_MASK, }, 127 { HI3620_VENC_MUX, "venc_mux", venc_mux_p, ARRAY_SIZE(venc_mux_p), CLK_SET_RATE_PARENT, 0x10c, 11, 1, CLK_MUX_HIWORD_MASK, }, 128 { HI3620_VDEC_MUX, "vdec_mux", vdec_mux_p, ARRAY_SIZE(vdec_mux_p), CLK_SET_RATE_PARENT, 0x110, 5, 1, CLK_MUX_HIWORD_MASK, }, 129 { HI3620_VPP_MUX, "vpp_mux", vpp_mux_p, ARRAY_SIZE(vpp_mux_p), CLK_SET_RATE_PARENT, 0x110, 11, 1, CLK_MUX_HIWORD_MASK, }, 130 { HI3620_EDC0_MUX, "edc0_mux", edc0_mux_p, ARRAY_SIZE(edc0_mux_p), CLK_SET_RATE_PARENT, 0x114, 6, 1, CLK_MUX_HIWORD_MASK, }, 131 { HI3620_LDI0_MUX, "ldi0_mux", ldi0_mux_p, ARRAY_SIZE(ldi0_mux_p), CLK_SET_RATE_PARENT, 0x114, 13, 2, CLK_MUX_HIWORD_MASK, }, 132 { HI3620_EDC1_MUX, "edc1_mux", edc1_mux_p, ARRAY_SIZE(edc1_mux_p), CLK_SET_RATE_PARENT, 0x118, 6, 1, CLK_MUX_HIWORD_MASK, }, 133 { HI3620_LDI1_MUX, "ldi1_mux", ldi1_mux_p, ARRAY_SIZE(ldi1_mux_p), CLK_SET_RATE_PARENT, 0x118, 14, 2, CLK_MUX_HIWORD_MASK, }, 134 { HI3620_RCLK_HSIC, "rclk_hsic", rclk_hsic_p, ARRAY_SIZE(rclk_hsic_p), CLK_SET_RATE_PARENT, 0x130, 2, 1, CLK_MUX_HIWORD_MASK, }, 135 { HI3620_MMC2_MUX, "mmc2_mux", mmc2_mux_p, ARRAY_SIZE(mmc2_mux_p), CLK_SET_RATE_PARENT, 0x140, 4, 1, CLK_MUX_HIWORD_MASK, }, 136 { HI3620_MMC3_MUX, "mmc3_mux", mmc3_mux_p, ARRAY_SIZE(mmc3_mux_p), CLK_SET_RATE_PARENT, 0x140, 9, 1, CLK_MUX_HIWORD_MASK, }, 137 }; 138 139 static struct hisi_divider_clock hi3620_div_clks[] __initdata = { 140 { HI3620_SHAREAXI_DIV, "saxi_div", "saxi_mux", 0, 0x100, 0, 5, CLK_DIVIDER_HIWORD_MASK, NULL, }, 141 { HI3620_CFGAXI_DIV, "cfgaxi_div", "saxi_div", 0, 0x100, 5, 2, CLK_DIVIDER_HIWORD_MASK, NULL, }, 142 { HI3620_SD_DIV, "sd_div", "sd_mux", 0, 0x108, 0, 4, CLK_DIVIDER_HIWORD_MASK, NULL, }, 143 { HI3620_MMC1_DIV, "mmc1_div", "mmc1_mux", 0, 0x108, 5, 4, CLK_DIVIDER_HIWORD_MASK, NULL, }, 144 { HI3620_HSIC_DIV, "hsic_div", "rclk_hsic", 0, 0x130, 0, 2, CLK_DIVIDER_HIWORD_MASK, NULL, }, 145 { HI3620_MMC2_DIV, "mmc2_div", "mmc2_mux", 0, 0x140, 0, 4, CLK_DIVIDER_HIWORD_MASK, NULL, }, 146 { HI3620_MMC3_DIV, "mmc3_div", "mmc3_mux", 0, 0x140, 5, 4, CLK_DIVIDER_HIWORD_MASK, NULL, }, 147 }; 148 149 static struct hisi_gate_clock hi3620_seperated_gate_clks[] __initdata = { 150 { HI3620_TIMERCLK01, "timerclk01", "timer_rclk01", CLK_SET_RATE_PARENT, 0x20, 0, 0, }, 151 { HI3620_TIMER_RCLK01, "timer_rclk01", "rclk_tcxo", CLK_SET_RATE_PARENT, 0x20, 1, 0, }, 152 { HI3620_TIMERCLK23, "timerclk23", "timer_rclk23", CLK_SET_RATE_PARENT, 0x20, 2, 0, }, 153 { HI3620_TIMER_RCLK23, "timer_rclk23", "rclk_tcxo", CLK_SET_RATE_PARENT, 0x20, 3, 0, }, 154 { HI3620_RTCCLK, "rtcclk", "pclk", CLK_SET_RATE_PARENT, 0x20, 5, 0, }, 155 { HI3620_KPC_CLK, "kpc_clk", "pclk", CLK_SET_RATE_PARENT, 0x20, 6, 0, }, 156 { HI3620_GPIOCLK0, "gpioclk0", "pclk", CLK_SET_RATE_PARENT, 0x20, 8, 0, }, 157 { HI3620_GPIOCLK1, "gpioclk1", "pclk", CLK_SET_RATE_PARENT, 0x20, 9, 0, }, 158 { HI3620_GPIOCLK2, "gpioclk2", "pclk", CLK_SET_RATE_PARENT, 0x20, 10, 0, }, 159 { HI3620_GPIOCLK3, "gpioclk3", "pclk", CLK_SET_RATE_PARENT, 0x20, 11, 0, }, 160 { HI3620_GPIOCLK4, "gpioclk4", "pclk", CLK_SET_RATE_PARENT, 0x20, 12, 0, }, 161 { HI3620_GPIOCLK5, "gpioclk5", "pclk", CLK_SET_RATE_PARENT, 0x20, 13, 0, }, 162 { HI3620_GPIOCLK6, "gpioclk6", "pclk", CLK_SET_RATE_PARENT, 0x20, 14, 0, }, 163 { HI3620_GPIOCLK7, "gpioclk7", "pclk", CLK_SET_RATE_PARENT, 0x20, 15, 0, }, 164 { HI3620_GPIOCLK8, "gpioclk8", "pclk", CLK_SET_RATE_PARENT, 0x20, 16, 0, }, 165 { HI3620_GPIOCLK9, "gpioclk9", "pclk", CLK_SET_RATE_PARENT, 0x20, 17, 0, }, 166 { HI3620_GPIOCLK10, "gpioclk10", "pclk", CLK_SET_RATE_PARENT, 0x20, 18, 0, }, 167 { HI3620_GPIOCLK11, "gpioclk11", "pclk", CLK_SET_RATE_PARENT, 0x20, 19, 0, }, 168 { HI3620_GPIOCLK12, "gpioclk12", "pclk", CLK_SET_RATE_PARENT, 0x20, 20, 0, }, 169 { HI3620_GPIOCLK13, "gpioclk13", "pclk", CLK_SET_RATE_PARENT, 0x20, 21, 0, }, 170 { HI3620_GPIOCLK14, "gpioclk14", "pclk", CLK_SET_RATE_PARENT, 0x20, 22, 0, }, 171 { HI3620_GPIOCLK15, "gpioclk15", "pclk", CLK_SET_RATE_PARENT, 0x20, 23, 0, }, 172 { HI3620_GPIOCLK16, "gpioclk16", "pclk", CLK_SET_RATE_PARENT, 0x20, 24, 0, }, 173 { HI3620_GPIOCLK17, "gpioclk17", "pclk", CLK_SET_RATE_PARENT, 0x20, 25, 0, }, 174 { HI3620_GPIOCLK18, "gpioclk18", "pclk", CLK_SET_RATE_PARENT, 0x20, 26, 0, }, 175 { HI3620_GPIOCLK19, "gpioclk19", "pclk", CLK_SET_RATE_PARENT, 0x20, 27, 0, }, 176 { HI3620_GPIOCLK20, "gpioclk20", "pclk", CLK_SET_RATE_PARENT, 0x20, 28, 0, }, 177 { HI3620_GPIOCLK21, "gpioclk21", "pclk", CLK_SET_RATE_PARENT, 0x20, 29, 0, }, 178 { HI3620_DPHY0_CLK, "dphy0_clk", "osc26m", CLK_SET_RATE_PARENT, 0x30, 15, 0, }, 179 { HI3620_DPHY1_CLK, "dphy1_clk", "osc26m", CLK_SET_RATE_PARENT, 0x30, 16, 0, }, 180 { HI3620_DPHY2_CLK, "dphy2_clk", "osc26m", CLK_SET_RATE_PARENT, 0x30, 17, 0, }, 181 { HI3620_USBPHY_CLK, "usbphy_clk", "rclk_pico", CLK_SET_RATE_PARENT, 0x30, 24, 0, }, 182 { HI3620_ACP_CLK, "acp_clk", "rclk_cfgaxi", CLK_SET_RATE_PARENT, 0x30, 28, 0, }, 183 { HI3620_TIMERCLK45, "timerclk45", "rclk_tcxo", CLK_SET_RATE_PARENT, 0x40, 3, 0, }, 184 { HI3620_TIMERCLK67, "timerclk67", "rclk_tcxo", CLK_SET_RATE_PARENT, 0x40, 4, 0, }, 185 { HI3620_TIMERCLK89, "timerclk89", "rclk_tcxo", CLK_SET_RATE_PARENT, 0x40, 5, 0, }, 186 { HI3620_PWMCLK0, "pwmclk0", "pwm0_mux", CLK_SET_RATE_PARENT, 0x40, 7, 0, }, 187 { HI3620_PWMCLK1, "pwmclk1", "pwm1_mux", CLK_SET_RATE_PARENT, 0x40, 8, 0, }, 188 { HI3620_UARTCLK0, "uartclk0", "uart0_mux", CLK_SET_RATE_PARENT, 0x40, 16, 0, }, 189 { HI3620_UARTCLK1, "uartclk1", "uart1_mux", CLK_SET_RATE_PARENT, 0x40, 17, 0, }, 190 { HI3620_UARTCLK2, "uartclk2", "uart2_mux", CLK_SET_RATE_PARENT, 0x40, 18, 0, }, 191 { HI3620_UARTCLK3, "uartclk3", "uart3_mux", CLK_SET_RATE_PARENT, 0x40, 19, 0, }, 192 { HI3620_UARTCLK4, "uartclk4", "uart4_mux", CLK_SET_RATE_PARENT, 0x40, 20, 0, }, 193 { HI3620_SPICLK0, "spiclk0", "spi0_mux", CLK_SET_RATE_PARENT, 0x40, 21, 0, }, 194 { HI3620_SPICLK1, "spiclk1", "spi1_mux", CLK_SET_RATE_PARENT, 0x40, 22, 0, }, 195 { HI3620_SPICLK2, "spiclk2", "spi2_mux", CLK_SET_RATE_PARENT, 0x40, 23, 0, }, 196 { HI3620_I2CCLK0, "i2cclk0", "pclk", CLK_SET_RATE_PARENT, 0x40, 24, 0, }, 197 { HI3620_I2CCLK1, "i2cclk1", "pclk", CLK_SET_RATE_PARENT, 0x40, 25, 0, }, 198 { HI3620_SCI_CLK, "sci_clk", "osc26m", CLK_SET_RATE_PARENT, 0x40, 26, 0, }, 199 { HI3620_I2CCLK2, "i2cclk2", "pclk", CLK_SET_RATE_PARENT, 0x40, 28, 0, }, 200 { HI3620_I2CCLK3, "i2cclk3", "pclk", CLK_SET_RATE_PARENT, 0x40, 29, 0, }, 201 { HI3620_DDRC_PER_CLK, "ddrc_per_clk", "rclk_cfgaxi", CLK_SET_RATE_PARENT, 0x50, 9, 0, }, 202 { HI3620_DMAC_CLK, "dmac_clk", "rclk_cfgaxi", CLK_SET_RATE_PARENT, 0x50, 10, 0, }, 203 { HI3620_USB2DVC_CLK, "usb2dvc_clk", "rclk_cfgaxi", CLK_SET_RATE_PARENT, 0x50, 17, 0, }, 204 { HI3620_SD_CLK, "sd_clk", "sd_div", CLK_SET_RATE_PARENT, 0x50, 20, 0, }, 205 { HI3620_MMC_CLK1, "mmc_clk1", "mmc1_mux2", CLK_SET_RATE_PARENT, 0x50, 21, 0, }, 206 { HI3620_MMC_CLK2, "mmc_clk2", "mmc2_div", CLK_SET_RATE_PARENT, 0x50, 22, 0, }, 207 { HI3620_MMC_CLK3, "mmc_clk3", "mmc3_div", CLK_SET_RATE_PARENT, 0x50, 23, 0, }, 208 { HI3620_MCU_CLK, "mcu_clk", "acp_clk", CLK_SET_RATE_PARENT, 0x50, 24, 0, }, 209 }; 210 211 static void __init hi3620_clk_init(struct device_node *np) 212 { 213 struct hisi_clock_data *clk_data; 214 215 clk_data = hisi_clk_init(np, HI3620_NR_CLKS); 216 if (!clk_data) 217 return; 218 219 hisi_clk_register_fixed_rate(hi3620_fixed_rate_clks, 220 ARRAY_SIZE(hi3620_fixed_rate_clks), 221 clk_data); 222 hisi_clk_register_fixed_factor(hi3620_fixed_factor_clks, 223 ARRAY_SIZE(hi3620_fixed_factor_clks), 224 clk_data); 225 hisi_clk_register_mux(hi3620_mux_clks, ARRAY_SIZE(hi3620_mux_clks), 226 clk_data); 227 hisi_clk_register_divider(hi3620_div_clks, ARRAY_SIZE(hi3620_div_clks), 228 clk_data); 229 hisi_clk_register_gate_sep(hi3620_seperated_gate_clks, 230 ARRAY_SIZE(hi3620_seperated_gate_clks), 231 clk_data); 232 } 233 CLK_OF_DECLARE(hi3620_clk, "hisilicon,hi3620-clock", hi3620_clk_init); 234 235 struct hisi_mmc_clock { 236 unsigned int id; 237 const char *name; 238 const char *parent_name; 239 unsigned long flags; 240 u32 clken_reg; 241 u32 clken_bit; 242 u32 div_reg; 243 u32 div_off; 244 u32 div_bits; 245 u32 drv_reg; 246 u32 drv_off; 247 u32 drv_bits; 248 u32 sam_reg; 249 u32 sam_off; 250 u32 sam_bits; 251 }; 252 253 struct clk_mmc { 254 struct clk_hw hw; 255 u32 id; 256 void __iomem *clken_reg; 257 u32 clken_bit; 258 void __iomem *div_reg; 259 u32 div_off; 260 u32 div_bits; 261 void __iomem *drv_reg; 262 u32 drv_off; 263 u32 drv_bits; 264 void __iomem *sam_reg; 265 u32 sam_off; 266 u32 sam_bits; 267 }; 268 269 #define to_mmc(_hw) container_of(_hw, struct clk_mmc, hw) 270 271 static struct hisi_mmc_clock hi3620_mmc_clks[] __initdata = { 272 { HI3620_SD_CIUCLK, "sd_bclk1", "sd_clk", CLK_SET_RATE_PARENT, 0x1f8, 0, 0x1f8, 1, 3, 0x1f8, 4, 4, 0x1f8, 8, 4}, 273 { HI3620_MMC_CIUCLK1, "mmc_bclk1", "mmc_clk1", CLK_SET_RATE_PARENT, 0x1f8, 12, 0x1f8, 13, 3, 0x1f8, 16, 4, 0x1f8, 20, 4}, 274 { HI3620_MMC_CIUCLK2, "mmc_bclk2", "mmc_clk2", CLK_SET_RATE_PARENT, 0x1f8, 24, 0x1f8, 25, 3, 0x1f8, 28, 4, 0x1fc, 0, 4}, 275 { HI3620_MMC_CIUCLK3, "mmc_bclk3", "mmc_clk3", CLK_SET_RATE_PARENT, 0x1fc, 4, 0x1fc, 5, 3, 0x1fc, 8, 4, 0x1fc, 12, 4}, 276 }; 277 278 static unsigned long mmc_clk_recalc_rate(struct clk_hw *hw, 279 unsigned long parent_rate) 280 { 281 switch (parent_rate) { 282 case 26000000: 283 return 13000000; 284 case 180000000: 285 return 25000000; 286 case 360000000: 287 return 50000000; 288 case 720000000: 289 return 100000000; 290 case 1440000000: 291 return 180000000; 292 default: 293 return parent_rate; 294 } 295 } 296 297 static long mmc_clk_determine_rate(struct clk_hw *hw, unsigned long rate, 298 unsigned long *best_parent_rate, 299 struct clk_hw **best_parent_p) 300 { 301 struct clk_mmc *mclk = to_mmc(hw); 302 unsigned long best = 0; 303 304 if ((rate <= 13000000) && (mclk->id == HI3620_MMC_CIUCLK1)) { 305 rate = 13000000; 306 best = 26000000; 307 } else if (rate <= 26000000) { 308 rate = 25000000; 309 best = 180000000; 310 } else if (rate <= 52000000) { 311 rate = 50000000; 312 best = 360000000; 313 } else if (rate <= 100000000) { 314 rate = 100000000; 315 best = 720000000; 316 } else { 317 /* max is 180M */ 318 rate = 180000000; 319 best = 1440000000; 320 } 321 *best_parent_rate = best; 322 return rate; 323 } 324 325 static u32 mmc_clk_delay(u32 val, u32 para, u32 off, u32 len) 326 { 327 u32 i; 328 329 for (i = 0; i < len; i++) { 330 if (para % 2) 331 val |= 1 << (off + i); 332 else 333 val &= ~(1 << (off + i)); 334 para = para >> 1; 335 } 336 337 return val; 338 } 339 340 static int mmc_clk_set_timing(struct clk_hw *hw, unsigned long rate) 341 { 342 struct clk_mmc *mclk = to_mmc(hw); 343 unsigned long flags; 344 u32 sam, drv, div, val; 345 static DEFINE_SPINLOCK(mmc_clk_lock); 346 347 switch (rate) { 348 case 13000000: 349 sam = 3; 350 drv = 1; 351 div = 1; 352 break; 353 case 25000000: 354 sam = 13; 355 drv = 6; 356 div = 6; 357 break; 358 case 50000000: 359 sam = 3; 360 drv = 6; 361 div = 6; 362 break; 363 case 100000000: 364 sam = 6; 365 drv = 4; 366 div = 6; 367 break; 368 case 180000000: 369 sam = 6; 370 drv = 4; 371 div = 7; 372 break; 373 default: 374 return -EINVAL; 375 } 376 377 spin_lock_irqsave(&mmc_clk_lock, flags); 378 379 val = readl_relaxed(mclk->clken_reg); 380 val &= ~(1 << mclk->clken_bit); 381 writel_relaxed(val, mclk->clken_reg); 382 383 val = readl_relaxed(mclk->sam_reg); 384 val = mmc_clk_delay(val, sam, mclk->sam_off, mclk->sam_bits); 385 writel_relaxed(val, mclk->sam_reg); 386 387 val = readl_relaxed(mclk->drv_reg); 388 val = mmc_clk_delay(val, drv, mclk->drv_off, mclk->drv_bits); 389 writel_relaxed(val, mclk->drv_reg); 390 391 val = readl_relaxed(mclk->div_reg); 392 val = mmc_clk_delay(val, div, mclk->div_off, mclk->div_bits); 393 writel_relaxed(val, mclk->div_reg); 394 395 val = readl_relaxed(mclk->clken_reg); 396 val |= 1 << mclk->clken_bit; 397 writel_relaxed(val, mclk->clken_reg); 398 399 spin_unlock_irqrestore(&mmc_clk_lock, flags); 400 401 return 0; 402 } 403 404 static int mmc_clk_prepare(struct clk_hw *hw) 405 { 406 struct clk_mmc *mclk = to_mmc(hw); 407 unsigned long rate; 408 409 if (mclk->id == HI3620_MMC_CIUCLK1) 410 rate = 13000000; 411 else 412 rate = 25000000; 413 414 return mmc_clk_set_timing(hw, rate); 415 } 416 417 static int mmc_clk_set_rate(struct clk_hw *hw, unsigned long rate, 418 unsigned long parent_rate) 419 { 420 return mmc_clk_set_timing(hw, rate); 421 } 422 423 static struct clk_ops clk_mmc_ops = { 424 .prepare = mmc_clk_prepare, 425 .determine_rate = mmc_clk_determine_rate, 426 .set_rate = mmc_clk_set_rate, 427 .recalc_rate = mmc_clk_recalc_rate, 428 }; 429 430 static struct clk *hisi_register_clk_mmc(struct hisi_mmc_clock *mmc_clk, 431 void __iomem *base, struct device_node *np) 432 { 433 struct clk_mmc *mclk; 434 struct clk *clk; 435 struct clk_init_data init; 436 437 mclk = kzalloc(sizeof(*mclk), GFP_KERNEL); 438 if (!mclk) { 439 pr_err("%s: fail to allocate mmc clk\n", __func__); 440 return ERR_PTR(-ENOMEM); 441 } 442 443 init.name = mmc_clk->name; 444 init.ops = &clk_mmc_ops; 445 init.flags = mmc_clk->flags | CLK_IS_BASIC; 446 init.parent_names = (mmc_clk->parent_name ? &mmc_clk->parent_name : NULL); 447 init.num_parents = (mmc_clk->parent_name ? 1 : 0); 448 mclk->hw.init = &init; 449 450 mclk->id = mmc_clk->id; 451 mclk->clken_reg = base + mmc_clk->clken_reg; 452 mclk->clken_bit = mmc_clk->clken_bit; 453 mclk->div_reg = base + mmc_clk->div_reg; 454 mclk->div_off = mmc_clk->div_off; 455 mclk->div_bits = mmc_clk->div_bits; 456 mclk->drv_reg = base + mmc_clk->drv_reg; 457 mclk->drv_off = mmc_clk->drv_off; 458 mclk->drv_bits = mmc_clk->drv_bits; 459 mclk->sam_reg = base + mmc_clk->sam_reg; 460 mclk->sam_off = mmc_clk->sam_off; 461 mclk->sam_bits = mmc_clk->sam_bits; 462 463 clk = clk_register(NULL, &mclk->hw); 464 if (WARN_ON(IS_ERR(clk))) 465 kfree(mclk); 466 return clk; 467 } 468 469 static void __init hi3620_mmc_clk_init(struct device_node *node) 470 { 471 void __iomem *base; 472 int i, num = ARRAY_SIZE(hi3620_mmc_clks); 473 struct clk_onecell_data *clk_data; 474 475 if (!node) { 476 pr_err("failed to find pctrl node in DTS\n"); 477 return; 478 } 479 480 base = of_iomap(node, 0); 481 if (!base) { 482 pr_err("failed to map pctrl\n"); 483 return; 484 } 485 486 clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL); 487 if (WARN_ON(!clk_data)) 488 return; 489 490 clk_data->clks = kzalloc(sizeof(struct clk *) * num, GFP_KERNEL); 491 if (!clk_data->clks) { 492 pr_err("%s: fail to allocate mmc clk\n", __func__); 493 return; 494 } 495 496 for (i = 0; i < num; i++) { 497 struct hisi_mmc_clock *mmc_clk = &hi3620_mmc_clks[i]; 498 clk_data->clks[mmc_clk->id] = 499 hisi_register_clk_mmc(mmc_clk, base, node); 500 } 501 502 clk_data->clk_num = num; 503 of_clk_add_provider(node, of_clk_src_onecell_get, clk_data); 504 } 505 506 CLK_OF_DECLARE(hi3620_mmc_clk, "hisilicon,hi3620-mmc-clock", hi3620_mmc_clk_init); 507