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linux/drivers/clk/hisilicon/clk-hi3620.c
Zhangfei Gao c115b13b85 clk: hisilicon: fix warning from smatch 
drivers/clk/hisilicon/clk-hi3620.c:338
mmc_clk_delay() warn: always true condition '(para >= 0) => (0-u32max >= 0)'

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-03-20 19:05:39 -07:00

507 lines
22 KiB
C
Raw Blame History

/*
* Hisilicon Hi3620 clock driver
*
* Copyright (c) 2012-2013 Hisilicon Limited.
* Copyright (c) 2012-2013 Linaro Limited.
*
* Author: Haojian Zhuang <haojian.zhuang@linaro.org>
* Xin Li <li.xin@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <linux/kernel.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <dt-bindings/clock/hi3620-clock.h>
#include "clk.h"
/* clock parent list */
static const char *timer0_mux_p[] __initdata = { "osc32k", "timerclk01", };
static const char *timer1_mux_p[] __initdata = { "osc32k", "timerclk01", };
static const char *timer2_mux_p[] __initdata = { "osc32k", "timerclk23", };
static const char *timer3_mux_p[] __initdata = { "osc32k", "timerclk23", };
static const char *timer4_mux_p[] __initdata = { "osc32k", "timerclk45", };
static const char *timer5_mux_p[] __initdata = { "osc32k", "timerclk45", };
static const char *timer6_mux_p[] __initdata = { "osc32k", "timerclk67", };
static const char *timer7_mux_p[] __initdata = { "osc32k", "timerclk67", };
static const char *timer8_mux_p[] __initdata = { "osc32k", "timerclk89", };
static const char *timer9_mux_p[] __initdata = { "osc32k", "timerclk89", };
static const char *uart0_mux_p[] __initdata = { "osc26m", "pclk", };
static const char *uart1_mux_p[] __initdata = { "osc26m", "pclk", };
static const char *uart2_mux_p[] __initdata = { "osc26m", "pclk", };
static const char *uart3_mux_p[] __initdata = { "osc26m", "pclk", };
static const char *uart4_mux_p[] __initdata = { "osc26m", "pclk", };
static const char *spi0_mux_p[] __initdata = { "osc26m", "rclk_cfgaxi", };
static const char *spi1_mux_p[] __initdata = { "osc26m", "rclk_cfgaxi", };
static const char *spi2_mux_p[] __initdata = { "osc26m", "rclk_cfgaxi", };
/* share axi parent */
static const char *saxi_mux_p[] __initdata = { "armpll3", "armpll2", };
static const char *pwm0_mux_p[] __initdata = { "osc32k", "osc26m", };
static const char *pwm1_mux_p[] __initdata = { "osc32k", "osc26m", };
static const char *sd_mux_p[] __initdata = { "armpll2", "armpll3", };
static const char *mmc1_mux_p[] __initdata = { "armpll2", "armpll3", };
static const char *mmc1_mux2_p[] __initdata = { "osc26m", "mmc1_div", };
static const char *g2d_mux_p[] __initdata = { "armpll2", "armpll3", };
static const char *venc_mux_p[] __initdata = { "armpll2", "armpll3", };
static const char *vdec_mux_p[] __initdata = { "armpll2", "armpll3", };
static const char *vpp_mux_p[] __initdata = { "armpll2", "armpll3", };
static const char *edc0_mux_p[] __initdata = { "armpll2", "armpll3", };
static const char *ldi0_mux_p[] __initdata = { "armpll2", "armpll4",
"armpll3", "armpll5", };
static const char *edc1_mux_p[] __initdata = { "armpll2", "armpll3", };
static const char *ldi1_mux_p[] __initdata = { "armpll2", "armpll4",
"armpll3", "armpll5", };
static const char *rclk_hsic_p[] __initdata = { "armpll3", "armpll2", };
static const char *mmc2_mux_p[] __initdata = { "armpll2", "armpll3", };
static const char *mmc3_mux_p[] __initdata = { "armpll2", "armpll3", };
/* fixed rate clocks */
static struct hisi_fixed_rate_clock hi3620_fixed_rate_clks[] __initdata = {
{ HI3620_OSC32K, "osc32k", NULL, CLK_IS_ROOT, 32768, },
{ HI3620_OSC26M, "osc26m", NULL, CLK_IS_ROOT, 26000000, },
{ HI3620_PCLK, "pclk", NULL, CLK_IS_ROOT, 26000000, },
{ HI3620_PLL_ARM0, "armpll0", NULL, CLK_IS_ROOT, 1600000000, },
{ HI3620_PLL_ARM1, "armpll1", NULL, CLK_IS_ROOT, 1600000000, },
{ HI3620_PLL_PERI, "armpll2", NULL, CLK_IS_ROOT, 1440000000, },
{ HI3620_PLL_USB, "armpll3", NULL, CLK_IS_ROOT, 1440000000, },
{ HI3620_PLL_HDMI, "armpll4", NULL, CLK_IS_ROOT, 1188000000, },
{ HI3620_PLL_GPU, "armpll5", NULL, CLK_IS_ROOT, 1300000000, },
};
/* fixed factor clocks */
static struct hisi_fixed_factor_clock hi3620_fixed_factor_clks[] __initdata = {
{ HI3620_RCLK_TCXO, "rclk_tcxo", "osc26m", 1, 4, 0, },
{ HI3620_RCLK_CFGAXI, "rclk_cfgaxi", "armpll2", 1, 30, 0, },
{ HI3620_RCLK_PICO, "rclk_pico", "hsic_div", 1, 40, 0, },
};
static struct hisi_mux_clock hi3620_mux_clks[] __initdata = {
{ HI3620_TIMER0_MUX, "timer0_mux", timer0_mux_p, ARRAY_SIZE(timer0_mux_p), CLK_SET_RATE_PARENT, 0, 15, 2, 0, },
{ HI3620_TIMER1_MUX, "timer1_mux", timer1_mux_p, ARRAY_SIZE(timer1_mux_p), CLK_SET_RATE_PARENT, 0, 17, 2, 0, },
{ HI3620_TIMER2_MUX, "timer2_mux", timer2_mux_p, ARRAY_SIZE(timer2_mux_p), CLK_SET_RATE_PARENT, 0, 19, 2, 0, },
{ HI3620_TIMER3_MUX, "timer3_mux", timer3_mux_p, ARRAY_SIZE(timer3_mux_p), CLK_SET_RATE_PARENT, 0, 21, 2, 0, },
{ HI3620_TIMER4_MUX, "timer4_mux", timer4_mux_p, ARRAY_SIZE(timer4_mux_p), CLK_SET_RATE_PARENT, 0x18, 0, 2, 0, },
{ HI3620_TIMER5_MUX, "timer5_mux", timer5_mux_p, ARRAY_SIZE(timer5_mux_p), CLK_SET_RATE_PARENT, 0x18, 2, 2, 0, },
{ HI3620_TIMER6_MUX, "timer6_mux", timer6_mux_p, ARRAY_SIZE(timer6_mux_p), CLK_SET_RATE_PARENT, 0x18, 4, 2, 0, },
{ HI3620_TIMER7_MUX, "timer7_mux", timer7_mux_p, ARRAY_SIZE(timer7_mux_p), CLK_SET_RATE_PARENT, 0x18, 6, 2, 0, },
{ HI3620_TIMER8_MUX, "timer8_mux", timer8_mux_p, ARRAY_SIZE(timer8_mux_p), CLK_SET_RATE_PARENT, 0x18, 8, 2, 0, },
{ HI3620_TIMER9_MUX, "timer9_mux", timer9_mux_p, ARRAY_SIZE(timer9_mux_p), CLK_SET_RATE_PARENT, 0x18, 10, 2, 0, },
{ HI3620_UART0_MUX, "uart0_mux", uart0_mux_p, ARRAY_SIZE(uart0_mux_p), CLK_SET_RATE_PARENT, 0x100, 7, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_UART1_MUX, "uart1_mux", uart1_mux_p, ARRAY_SIZE(uart1_mux_p), CLK_SET_RATE_PARENT, 0x100, 8, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_UART2_MUX, "uart2_mux", uart2_mux_p, ARRAY_SIZE(uart2_mux_p), CLK_SET_RATE_PARENT, 0x100, 9, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_UART3_MUX, "uart3_mux", uart3_mux_p, ARRAY_SIZE(uart3_mux_p), CLK_SET_RATE_PARENT, 0x100, 10, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_UART4_MUX, "uart4_mux", uart4_mux_p, ARRAY_SIZE(uart4_mux_p), CLK_SET_RATE_PARENT, 0x100, 11, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_SPI0_MUX, "spi0_mux", spi0_mux_p, ARRAY_SIZE(spi0_mux_p), CLK_SET_RATE_PARENT, 0x100, 12, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_SPI1_MUX, "spi1_mux", spi1_mux_p, ARRAY_SIZE(spi1_mux_p), CLK_SET_RATE_PARENT, 0x100, 13, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_SPI2_MUX, "spi2_mux", spi2_mux_p, ARRAY_SIZE(spi2_mux_p), CLK_SET_RATE_PARENT, 0x100, 14, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_SAXI_MUX, "saxi_mux", saxi_mux_p, ARRAY_SIZE(saxi_mux_p), CLK_SET_RATE_PARENT, 0x100, 15, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_PWM0_MUX, "pwm0_mux", pwm0_mux_p, ARRAY_SIZE(pwm0_mux_p), CLK_SET_RATE_PARENT, 0x104, 10, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_PWM1_MUX, "pwm1_mux", pwm1_mux_p, ARRAY_SIZE(pwm1_mux_p), CLK_SET_RATE_PARENT, 0x104, 11, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_SD_MUX, "sd_mux", sd_mux_p, ARRAY_SIZE(sd_mux_p), CLK_SET_RATE_PARENT, 0x108, 4, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_MMC1_MUX, "mmc1_mux", mmc1_mux_p, ARRAY_SIZE(mmc1_mux_p), CLK_SET_RATE_PARENT, 0x108, 9, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_MMC1_MUX2, "mmc1_mux2", mmc1_mux2_p, ARRAY_SIZE(mmc1_mux2_p), CLK_SET_RATE_PARENT, 0x108, 10, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_G2D_MUX, "g2d_mux", g2d_mux_p, ARRAY_SIZE(g2d_mux_p), CLK_SET_RATE_PARENT, 0x10c, 5, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_VENC_MUX, "venc_mux", venc_mux_p, ARRAY_SIZE(venc_mux_p), CLK_SET_RATE_PARENT, 0x10c, 11, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_VDEC_MUX, "vdec_mux", vdec_mux_p, ARRAY_SIZE(vdec_mux_p), CLK_SET_RATE_PARENT, 0x110, 5, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_VPP_MUX, "vpp_mux", vpp_mux_p, ARRAY_SIZE(vpp_mux_p), CLK_SET_RATE_PARENT, 0x110, 11, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_EDC0_MUX, "edc0_mux", edc0_mux_p, ARRAY_SIZE(edc0_mux_p), CLK_SET_RATE_PARENT, 0x114, 6, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_LDI0_MUX, "ldi0_mux", ldi0_mux_p, ARRAY_SIZE(ldi0_mux_p), CLK_SET_RATE_PARENT, 0x114, 13, 2, CLK_MUX_HIWORD_MASK, },
{ HI3620_EDC1_MUX, "edc1_mux", edc1_mux_p, ARRAY_SIZE(edc1_mux_p), CLK_SET_RATE_PARENT, 0x118, 6, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_LDI1_MUX, "ldi1_mux", ldi1_mux_p, ARRAY_SIZE(ldi1_mux_p), CLK_SET_RATE_PARENT, 0x118, 14, 2, CLK_MUX_HIWORD_MASK, },
{ HI3620_RCLK_HSIC, "rclk_hsic", rclk_hsic_p, ARRAY_SIZE(rclk_hsic_p), CLK_SET_RATE_PARENT, 0x130, 2, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_MMC2_MUX, "mmc2_mux", mmc2_mux_p, ARRAY_SIZE(mmc2_mux_p), CLK_SET_RATE_PARENT, 0x140, 4, 1, CLK_MUX_HIWORD_MASK, },
{ HI3620_MMC3_MUX, "mmc3_mux", mmc3_mux_p, ARRAY_SIZE(mmc3_mux_p), CLK_SET_RATE_PARENT, 0x140, 9, 1, CLK_MUX_HIWORD_MASK, },
};
static struct hisi_divider_clock hi3620_div_clks[] __initdata = {
{ HI3620_SHAREAXI_DIV, "saxi_div", "saxi_mux", 0, 0x100, 0, 5, CLK_DIVIDER_HIWORD_MASK, NULL, },
{ HI3620_CFGAXI_DIV, "cfgaxi_div", "saxi_div", 0, 0x100, 5, 2, CLK_DIVIDER_HIWORD_MASK, NULL, },
{ HI3620_SD_DIV, "sd_div", "sd_mux", 0, 0x108, 0, 4, CLK_DIVIDER_HIWORD_MASK, NULL, },
{ HI3620_MMC1_DIV, "mmc1_div", "mmc1_mux", 0, 0x108, 5, 4, CLK_DIVIDER_HIWORD_MASK, NULL, },
{ HI3620_HSIC_DIV, "hsic_div", "rclk_hsic", 0, 0x130, 0, 2, CLK_DIVIDER_HIWORD_MASK, NULL, },
{ HI3620_MMC2_DIV, "mmc2_div", "mmc2_mux", 0, 0x140, 0, 4, CLK_DIVIDER_HIWORD_MASK, NULL, },
{ HI3620_MMC3_DIV, "mmc3_div", "mmc3_mux", 0, 0x140, 5, 4, CLK_DIVIDER_HIWORD_MASK, NULL, },
};
static struct hisi_gate_clock hi3620_seperated_gate_clks[] __initdata = {
{ HI3620_TIMERCLK01, "timerclk01", "timer_rclk01", CLK_SET_RATE_PARENT, 0x20, 0, 0, },
{ HI3620_TIMER_RCLK01, "timer_rclk01", "rclk_tcxo", CLK_SET_RATE_PARENT, 0x20, 1, 0, },
{ HI3620_TIMERCLK23, "timerclk23", "timer_rclk23", CLK_SET_RATE_PARENT, 0x20, 2, 0, },
{ HI3620_TIMER_RCLK23, "timer_rclk23", "rclk_tcxo", CLK_SET_RATE_PARENT, 0x20, 3, 0, },
{ HI3620_RTCCLK, "rtcclk", "pclk", CLK_SET_RATE_PARENT, 0x20, 5, 0, },
{ HI3620_KPC_CLK, "kpc_clk", "pclk", CLK_SET_RATE_PARENT, 0x20, 6, 0, },
{ HI3620_GPIOCLK0, "gpioclk0", "pclk", CLK_SET_RATE_PARENT, 0x20, 8, 0, },
{ HI3620_GPIOCLK1, "gpioclk1", "pclk", CLK_SET_RATE_PARENT, 0x20, 9, 0, },
{ HI3620_GPIOCLK2, "gpioclk2", "pclk", CLK_SET_RATE_PARENT, 0x20, 10, 0, },
{ HI3620_GPIOCLK3, "gpioclk3", "pclk", CLK_SET_RATE_PARENT, 0x20, 11, 0, },
{ HI3620_GPIOCLK4, "gpioclk4", "pclk", CLK_SET_RATE_PARENT, 0x20, 12, 0, },
{ HI3620_GPIOCLK5, "gpioclk5", "pclk", CLK_SET_RATE_PARENT, 0x20, 13, 0, },
{ HI3620_GPIOCLK6, "gpioclk6", "pclk", CLK_SET_RATE_PARENT, 0x20, 14, 0, },
{ HI3620_GPIOCLK7, "gpioclk7", "pclk", CLK_SET_RATE_PARENT, 0x20, 15, 0, },
{ HI3620_GPIOCLK8, "gpioclk8", "pclk", CLK_SET_RATE_PARENT, 0x20, 16, 0, },
{ HI3620_GPIOCLK9, "gpioclk9", "pclk", CLK_SET_RATE_PARENT, 0x20, 17, 0, },
{ HI3620_GPIOCLK10, "gpioclk10", "pclk", CLK_SET_RATE_PARENT, 0x20, 18, 0, },
{ HI3620_GPIOCLK11, "gpioclk11", "pclk", CLK_SET_RATE_PARENT, 0x20, 19, 0, },
{ HI3620_GPIOCLK12, "gpioclk12", "pclk", CLK_SET_RATE_PARENT, 0x20, 20, 0, },
{ HI3620_GPIOCLK13, "gpioclk13", "pclk", CLK_SET_RATE_PARENT, 0x20, 21, 0, },
{ HI3620_GPIOCLK14, "gpioclk14", "pclk", CLK_SET_RATE_PARENT, 0x20, 22, 0, },
{ HI3620_GPIOCLK15, "gpioclk15", "pclk", CLK_SET_RATE_PARENT, 0x20, 23, 0, },
{ HI3620_GPIOCLK16, "gpioclk16", "pclk", CLK_SET_RATE_PARENT, 0x20, 24, 0, },
{ HI3620_GPIOCLK17, "gpioclk17", "pclk", CLK_SET_RATE_PARENT, 0x20, 25, 0, },
{ HI3620_GPIOCLK18, "gpioclk18", "pclk", CLK_SET_RATE_PARENT, 0x20, 26, 0, },
{ HI3620_GPIOCLK19, "gpioclk19", "pclk", CLK_SET_RATE_PARENT, 0x20, 27, 0, },
{ HI3620_GPIOCLK20, "gpioclk20", "pclk", CLK_SET_RATE_PARENT, 0x20, 28, 0, },
{ HI3620_GPIOCLK21, "gpioclk21", "pclk", CLK_SET_RATE_PARENT, 0x20, 29, 0, },
{ HI3620_DPHY0_CLK, "dphy0_clk", "osc26m", CLK_SET_RATE_PARENT, 0x30, 15, 0, },
{ HI3620_DPHY1_CLK, "dphy1_clk", "osc26m", CLK_SET_RATE_PARENT, 0x30, 16, 0, },
{ HI3620_DPHY2_CLK, "dphy2_clk", "osc26m", CLK_SET_RATE_PARENT, 0x30, 17, 0, },
{ HI3620_USBPHY_CLK, "usbphy_clk", "rclk_pico", CLK_SET_RATE_PARENT, 0x30, 24, 0, },
{ HI3620_ACP_CLK, "acp_clk", "rclk_cfgaxi", CLK_SET_RATE_PARENT, 0x30, 28, 0, },
{ HI3620_TIMERCLK45, "timerclk45", "rclk_tcxo", CLK_SET_RATE_PARENT, 0x40, 3, 0, },
{ HI3620_TIMERCLK67, "timerclk67", "rclk_tcxo", CLK_SET_RATE_PARENT, 0x40, 4, 0, },
{ HI3620_TIMERCLK89, "timerclk89", "rclk_tcxo", CLK_SET_RATE_PARENT, 0x40, 5, 0, },
{ HI3620_PWMCLK0, "pwmclk0", "pwm0_mux", CLK_SET_RATE_PARENT, 0x40, 7, 0, },
{ HI3620_PWMCLK1, "pwmclk1", "pwm1_mux", CLK_SET_RATE_PARENT, 0x40, 8, 0, },
{ HI3620_UARTCLK0, "uartclk0", "uart0_mux", CLK_SET_RATE_PARENT, 0x40, 16, 0, },
{ HI3620_UARTCLK1, "uartclk1", "uart1_mux", CLK_SET_RATE_PARENT, 0x40, 17, 0, },
{ HI3620_UARTCLK2, "uartclk2", "uart2_mux", CLK_SET_RATE_PARENT, 0x40, 18, 0, },
{ HI3620_UARTCLK3, "uartclk3", "uart3_mux", CLK_SET_RATE_PARENT, 0x40, 19, 0, },
{ HI3620_UARTCLK4, "uartclk4", "uart4_mux", CLK_SET_RATE_PARENT, 0x40, 20, 0, },
{ HI3620_SPICLK0, "spiclk0", "spi0_mux", CLK_SET_RATE_PARENT, 0x40, 21, 0, },
{ HI3620_SPICLK1, "spiclk1", "spi1_mux", CLK_SET_RATE_PARENT, 0x40, 22, 0, },
{ HI3620_SPICLK2, "spiclk2", "spi2_mux", CLK_SET_RATE_PARENT, 0x40, 23, 0, },
{ HI3620_I2CCLK0, "i2cclk0", "pclk", CLK_SET_RATE_PARENT, 0x40, 24, 0, },
{ HI3620_I2CCLK1, "i2cclk1", "pclk", CLK_SET_RATE_PARENT, 0x40, 25, 0, },
{ HI3620_SCI_CLK, "sci_clk", "osc26m", CLK_SET_RATE_PARENT, 0x40, 26, 0, },
{ HI3620_I2CCLK2, "i2cclk2", "pclk", CLK_SET_RATE_PARENT, 0x40, 28, 0, },
{ HI3620_I2CCLK3, "i2cclk3", "pclk", CLK_SET_RATE_PARENT, 0x40, 29, 0, },
{ HI3620_DDRC_PER_CLK, "ddrc_per_clk", "rclk_cfgaxi", CLK_SET_RATE_PARENT, 0x50, 9, 0, },
{ HI3620_DMAC_CLK, "dmac_clk", "rclk_cfgaxi", CLK_SET_RATE_PARENT, 0x50, 10, 0, },
{ HI3620_USB2DVC_CLK, "usb2dvc_clk", "rclk_cfgaxi", CLK_SET_RATE_PARENT, 0x50, 17, 0, },
{ HI3620_SD_CLK, "sd_clk", "sd_div", CLK_SET_RATE_PARENT, 0x50, 20, 0, },
{ HI3620_MMC_CLK1, "mmc_clk1", "mmc1_mux2", CLK_SET_RATE_PARENT, 0x50, 21, 0, },
{ HI3620_MMC_CLK2, "mmc_clk2", "mmc2_div", CLK_SET_RATE_PARENT, 0x50, 22, 0, },
{ HI3620_MMC_CLK3, "mmc_clk3", "mmc3_div", CLK_SET_RATE_PARENT, 0x50, 23, 0, },
{ HI3620_MCU_CLK, "mcu_clk", "acp_clk", CLK_SET_RATE_PARENT, 0x50, 24, 0, },
};
static void __init hi3620_clk_init(struct device_node *np)
{
struct hisi_clock_data *clk_data;
clk_data = hisi_clk_init(np, HI3620_NR_CLKS);
if (!clk_data)
return;
hisi_clk_register_fixed_rate(hi3620_fixed_rate_clks,
ARRAY_SIZE(hi3620_fixed_rate_clks),
clk_data);
hisi_clk_register_fixed_factor(hi3620_fixed_factor_clks,
ARRAY_SIZE(hi3620_fixed_factor_clks),
clk_data);
hisi_clk_register_mux(hi3620_mux_clks, ARRAY_SIZE(hi3620_mux_clks),
clk_data);
hisi_clk_register_divider(hi3620_div_clks, ARRAY_SIZE(hi3620_div_clks),
clk_data);
hisi_clk_register_gate_sep(hi3620_seperated_gate_clks,
ARRAY_SIZE(hi3620_seperated_gate_clks),
clk_data);
}
CLK_OF_DECLARE(hi3620_clk, "hisilicon,hi3620-clock", hi3620_clk_init);
struct hisi_mmc_clock {
unsigned int id;
const char *name;
const char *parent_name;
unsigned long flags;
u32 clken_reg;
u32 clken_bit;
u32 div_reg;
u32 div_off;
u32 div_bits;
u32 drv_reg;
u32 drv_off;
u32 drv_bits;
u32 sam_reg;
u32 sam_off;
u32 sam_bits;
};
struct clk_mmc {
struct clk_hw hw;
u32 id;
void __iomem *clken_reg;
u32 clken_bit;
void __iomem *div_reg;
u32 div_off;
u32 div_bits;
void __iomem *drv_reg;
u32 drv_off;
u32 drv_bits;
void __iomem *sam_reg;
u32 sam_off;
u32 sam_bits;
};
#define to_mmc(_hw) container_of(_hw, struct clk_mmc, hw)
static struct hisi_mmc_clock hi3620_mmc_clks[] __initdata = {
{ HI3620_SD_CIUCLK, "sd_bclk1", "sd_clk", CLK_SET_RATE_PARENT, 0x1f8, 0, 0x1f8, 1, 3, 0x1f8, 4, 4, 0x1f8, 8, 4},
{ HI3620_MMC_CIUCLK1, "mmc_bclk1", "mmc_clk1", CLK_SET_RATE_PARENT, 0x1f8, 12, 0x1f8, 13, 3, 0x1f8, 16, 4, 0x1f8, 20, 4},
{ HI3620_MMC_CIUCLK2, "mmc_bclk2", "mmc_clk2", CLK_SET_RATE_PARENT, 0x1f8, 24, 0x1f8, 25, 3, 0x1f8, 28, 4, 0x1fc, 0, 4},
{ HI3620_MMC_CIUCLK3, "mmc_bclk3", "mmc_clk3", CLK_SET_RATE_PARENT, 0x1fc, 4, 0x1fc, 5, 3, 0x1fc, 8, 4, 0x1fc, 12, 4},
};
static unsigned long mmc_clk_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
switch (parent_rate) {
case 26000000:
return 13000000;
case 180000000:
return 25000000;
case 360000000:
return 50000000;
case 720000000:
return 100000000;
case 1440000000:
return 180000000;
default:
return parent_rate;
}
}
static long mmc_clk_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate,
struct clk **best_parent_p)
{
struct clk_mmc *mclk = to_mmc(hw);
unsigned long best = 0;
if ((rate <= 13000000) && (mclk->id == HI3620_MMC_CIUCLK1)) {
rate = 13000000;
best = 26000000;
} else if (rate <= 26000000) {
rate = 25000000;
best = 180000000;
} else if (rate <= 52000000) {
rate = 50000000;
best = 360000000;
} else if (rate <= 100000000) {
rate = 100000000;
best = 720000000;
} else {
/* max is 180M */
rate = 180000000;
best = 1440000000;
}
*best_parent_rate = best;
return rate;
}
static u32 mmc_clk_delay(u32 val, u32 para, u32 off, u32 len)
{
u32 i;
for (i = 0; i < len; i++) {
if (para % 2)
val |= 1 << (off + i);
else
val &= ~(1 << (off + i));
para = para >> 1;
}
return val;
}
static int mmc_clk_set_timing(struct clk_hw *hw, unsigned long rate)
{
struct clk_mmc *mclk = to_mmc(hw);
unsigned long flags;
u32 sam, drv, div, val;
static DEFINE_SPINLOCK(mmc_clk_lock);
switch (rate) {
case 13000000:
sam = 3;
drv = 1;
div = 1;
break;
case 25000000:
sam = 13;
drv = 6;
div = 6;
break;
case 50000000:
sam = 3;
drv = 6;
div = 6;
break;
case 100000000:
sam = 6;
drv = 4;
div = 6;
break;
case 180000000:
sam = 6;
drv = 4;
div = 7;
break;
default:
return -EINVAL;
}
spin_lock_irqsave(&mmc_clk_lock, flags);
val = readl_relaxed(mclk->clken_reg);
val &= ~(1 << mclk->clken_bit);
writel_relaxed(val, mclk->clken_reg);
val = readl_relaxed(mclk->sam_reg);
val = mmc_clk_delay(val, sam, mclk->sam_off, mclk->sam_bits);
writel_relaxed(val, mclk->sam_reg);
val = readl_relaxed(mclk->drv_reg);
val = mmc_clk_delay(val, drv, mclk->drv_off, mclk->drv_bits);
writel_relaxed(val, mclk->drv_reg);
val = readl_relaxed(mclk->div_reg);
val = mmc_clk_delay(val, div, mclk->div_off, mclk->div_bits);
writel_relaxed(val, mclk->div_reg);
val = readl_relaxed(mclk->clken_reg);
val |= 1 << mclk->clken_bit;
writel_relaxed(val, mclk->clken_reg);
spin_unlock_irqrestore(&mmc_clk_lock, flags);
return 0;
}
static int mmc_clk_prepare(struct clk_hw *hw)
{
struct clk_mmc *mclk = to_mmc(hw);
unsigned long rate;
if (mclk->id == HI3620_MMC_CIUCLK1)
rate = 13000000;
else
rate = 25000000;
return mmc_clk_set_timing(hw, rate);
}
static int mmc_clk_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
return mmc_clk_set_timing(hw, rate);
}
static struct clk_ops clk_mmc_ops = {
.prepare = mmc_clk_prepare,
.determine_rate = mmc_clk_determine_rate,
.set_rate = mmc_clk_set_rate,
.recalc_rate = mmc_clk_recalc_rate,
};
static struct clk *hisi_register_clk_mmc(struct hisi_mmc_clock *mmc_clk,
void __iomem *base, struct device_node *np)
{
struct clk_mmc *mclk;
struct clk *clk;
struct clk_init_data init;
mclk = kzalloc(sizeof(*mclk), GFP_KERNEL);
if (!mclk) {
pr_err("%s: fail to allocate mmc clk\n", __func__);
return ERR_PTR(-ENOMEM);
}
init.name = mmc_clk->name;
init.ops = &clk_mmc_ops;
init.flags = mmc_clk->flags | CLK_IS_BASIC;
init.parent_names = (mmc_clk->parent_name ? &mmc_clk->parent_name : NULL);
init.num_parents = (mmc_clk->parent_name ? 1 : 0);
mclk->hw.init = &init;
mclk->id = mmc_clk->id;
mclk->clken_reg = base + mmc_clk->clken_reg;
mclk->clken_bit = mmc_clk->clken_bit;
mclk->div_reg = base + mmc_clk->div_reg;
mclk->div_off = mmc_clk->div_off;
mclk->div_bits = mmc_clk->div_bits;
mclk->drv_reg = base + mmc_clk->drv_reg;
mclk->drv_off = mmc_clk->drv_off;
mclk->drv_bits = mmc_clk->drv_bits;
mclk->sam_reg = base + mmc_clk->sam_reg;
mclk->sam_off = mmc_clk->sam_off;
mclk->sam_bits = mmc_clk->sam_bits;
clk = clk_register(NULL, &mclk->hw);
if (WARN_ON(IS_ERR(clk)))
kfree(mclk);
return clk;
}
static void __init hi3620_mmc_clk_init(struct device_node *node)
{
void __iomem *base;
int i, num = ARRAY_SIZE(hi3620_mmc_clks);
struct clk_onecell_data *clk_data;
if (!node) {
pr_err("failed to find pctrl node in DTS\n");
return;
}
base = of_iomap(node, 0);
if (!base) {
pr_err("failed to map pctrl\n");
return;
}
clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
if (WARN_ON(!clk_data))
return;
clk_data->clks = kzalloc(sizeof(struct clk *) * num, GFP_KERNEL);
if (!clk_data->clks) {
pr_err("%s: fail to allocate mmc clk\n", __func__);
return;
}
for (i = 0; i < num; i++) {
struct hisi_mmc_clock *mmc_clk = &hi3620_mmc_clks[i];
clk_data->clks[mmc_clk->id] =
hisi_register_clk_mmc(mmc_clk, base, node);
}
clk_data->clk_num = num;
of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
}
CLK_OF_DECLARE(hi3620_mmc_clk, "hisilicon,hi3620-mmc-clock", hi3620_mmc_clk_init);
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