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linux/arch/arm/plat-s5pc1xx/clock.c
Kyungmin Park ff916f25b2 ARM: S5PC1XX: clocks reimplementation 
Clocks hierarchy has been completely reimplemented to match the S5PC100
specification.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2009-12-01 01:33:13 +00:00

729 lines
15 KiB
C
Raw Blame History

/* linux/arch/arm/plat-s5pc1xx/clock.c
*
* Copyright 2009 Samsung Electronics Co.
*
* S5PC1XX Base clock support
*
* Based on plat-s3c64xx/clock.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <mach/map.h>
#include <plat/regs-clock.h>
#include <plat/devs.h>
#include <plat/clock.h>
struct clk clk_27m = {
.name = "clk_27m",
.id = -1,
.rate = 27000000,
};
static int clk_48m_ctrl(struct clk *clk, int enable)
{
unsigned long flags;
u32 val;
/* can't rely on clock lock, this register has other usages */
local_irq_save(flags);
val = __raw_readl(S5PC100_CLKSRC1);
if (enable)
val |= S5PC100_CLKSRC1_CLK48M_MASK;
else
val &= ~S5PC100_CLKSRC1_CLK48M_MASK;
__raw_writel(val, S5PC100_CLKSRC1);
local_irq_restore(flags);
return 0;
}
struct clk clk_48m = {
.name = "clk_48m",
.id = -1,
.rate = 48000000,
.enable = clk_48m_ctrl,
};
struct clk clk_54m = {
.name = "clk_54m",
.id = -1,
.rate = 54000000,
};
static int clk_default_setrate(struct clk *clk, unsigned long rate)
{
clk->rate = rate;
return 0;
}
static int clk_dummy_enable(struct clk *clk, int enable)
{
return 0;
}
struct clk clk_hd0 = {
.name = "hclkd0",
.id = -1,
.rate = 0,
.parent = NULL,
.ctrlbit = 0,
.set_rate = clk_default_setrate,
.enable = clk_dummy_enable,
};
struct clk clk_pd0 = {
.name = "pclkd0",
.id = -1,
.rate = 0,
.parent = NULL,
.ctrlbit = 0,
.set_rate = clk_default_setrate,
.enable = clk_dummy_enable,
};
static int s5pc1xx_clk_gate(void __iomem *reg, struct clk *clk, int enable)
{
unsigned int ctrlbit = clk->ctrlbit;
u32 con;
con = __raw_readl(reg);
if (enable)
con |= ctrlbit;
else
con &= ~ctrlbit;
__raw_writel(con, reg);
return 0;
}
static int s5pc100_clk_d00_ctrl(struct clk *clk, int enable)
{
return s5pc1xx_clk_gate(S5PC100_CLKGATE_D00, clk, enable);
}
static int s5pc100_clk_d01_ctrl(struct clk *clk, int enable)
{
return s5pc1xx_clk_gate(S5PC100_CLKGATE_D01, clk, enable);
}
static int s5pc100_clk_d02_ctrl(struct clk *clk, int enable)
{
return s5pc1xx_clk_gate(S5PC100_CLKGATE_D02, clk, enable);
}
static int s5pc100_clk_d10_ctrl(struct clk *clk, int enable)
{
return s5pc1xx_clk_gate(S5PC100_CLKGATE_D10, clk, enable);
}
static int s5pc100_clk_d11_ctrl(struct clk *clk, int enable)
{
return s5pc1xx_clk_gate(S5PC100_CLKGATE_D11, clk, enable);
}
static int s5pc100_clk_d12_ctrl(struct clk *clk, int enable)
{
return s5pc1xx_clk_gate(S5PC100_CLKGATE_D12, clk, enable);
}
static int s5pc100_clk_d13_ctrl(struct clk *clk, int enable)
{
return s5pc1xx_clk_gate(S5PC100_CLKGATE_D13, clk, enable);
}
static int s5pc100_clk_d14_ctrl(struct clk *clk, int enable)
{
return s5pc1xx_clk_gate(S5PC100_CLKGATE_D14, clk, enable);
}
static int s5pc100_clk_d15_ctrl(struct clk *clk, int enable)
{
return s5pc1xx_clk_gate(S5PC100_CLKGATE_D15, clk, enable);
}
static int s5pc100_clk_d20_ctrl(struct clk *clk, int enable)
{
return s5pc1xx_clk_gate(S5PC100_CLKGATE_D20, clk, enable);
}
int s5pc100_sclk0_ctrl(struct clk *clk, int enable)
{
return s5pc1xx_clk_gate(S5PC100_SCLKGATE0, clk, enable);
}
int s5pc100_sclk1_ctrl(struct clk *clk, int enable)
{
return s5pc1xx_clk_gate(S5PC100_SCLKGATE1, clk, enable);
}
static struct clk s5pc100_init_clocks_disable[] = {
{
.name = "dsi",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d11_ctrl,
.ctrlbit = S5PC100_CLKGATE_D11_DSI,
}, {
.name = "csi",
.id = -1,
.parent = &clk_h,
.enable = s5pc100_clk_d11_ctrl,
.ctrlbit = S5PC100_CLKGATE_D11_CSI,
}, {
.name = "ccan",
.id = 0,
.parent = &clk_p,
.enable = s5pc100_clk_d14_ctrl,
.ctrlbit = S5PC100_CLKGATE_D14_CCAN0,
}, {
.name = "ccan",
.id = 1,
.parent = &clk_p,
.enable = s5pc100_clk_d14_ctrl,
.ctrlbit = S5PC100_CLKGATE_D14_CCAN1,
}, {
.name = "keypad",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d15_ctrl,
.ctrlbit = S5PC100_CLKGATE_D15_KEYIF,
}, {
.name = "hclkd2",
.id = -1,
.parent = NULL,
.enable = s5pc100_clk_d20_ctrl,
.ctrlbit = S5PC100_CLKGATE_D20_HCLKD2,
}, {
.name = "iis-d2",
.id = -1,
.parent = NULL,
.enable = s5pc100_clk_d20_ctrl,
.ctrlbit = S5PC100_CLKGATE_D20_I2SD2,
},
};
static struct clk s5pc100_init_clocks[] = {
/* System1 (D0_0) devices */
{
.name = "intc",
.id = -1,
.parent = &clk_hd0,
.enable = s5pc100_clk_d00_ctrl,
.ctrlbit = S5PC100_CLKGATE_D00_INTC,
}, {
.name = "tzic",
.id = -1,
.parent = &clk_hd0,
.enable = s5pc100_clk_d00_ctrl,
.ctrlbit = S5PC100_CLKGATE_D00_TZIC,
}, {
.name = "cf-ata",
.id = -1,
.parent = &clk_hd0,
.enable = s5pc100_clk_d00_ctrl,
.ctrlbit = S5PC100_CLKGATE_D00_CFCON,
}, {
.name = "mdma",
.id = -1,
.parent = &clk_hd0,
.enable = s5pc100_clk_d00_ctrl,
.ctrlbit = S5PC100_CLKGATE_D00_MDMA,
}, {
.name = "g2d",
.id = -1,
.parent = &clk_hd0,
.enable = s5pc100_clk_d00_ctrl,
.ctrlbit = S5PC100_CLKGATE_D00_G2D,
}, {
.name = "secss",
.id = -1,
.parent = &clk_hd0,
.enable = s5pc100_clk_d00_ctrl,
.ctrlbit = S5PC100_CLKGATE_D00_SECSS,
}, {
.name = "cssys",
.id = -1,
.parent = &clk_hd0,
.enable = s5pc100_clk_d00_ctrl,
.ctrlbit = S5PC100_CLKGATE_D00_CSSYS,
},
/* Memory (D0_1) devices */
{
.name = "dmc",
.id = -1,
.parent = &clk_hd0,
.enable = s5pc100_clk_d01_ctrl,
.ctrlbit = S5PC100_CLKGATE_D01_DMC,
}, {
.name = "sromc",
.id = -1,
.parent = &clk_hd0,
.enable = s5pc100_clk_d01_ctrl,
.ctrlbit = S5PC100_CLKGATE_D01_SROMC,
}, {
.name = "onenand",
.id = -1,
.parent = &clk_hd0,
.enable = s5pc100_clk_d01_ctrl,
.ctrlbit = S5PC100_CLKGATE_D01_ONENAND,
}, {
.name = "nand",
.id = -1,
.parent = &clk_hd0,
.enable = s5pc100_clk_d01_ctrl,
.ctrlbit = S5PC100_CLKGATE_D01_NFCON,
}, {
.name = "intmem",
.id = -1,
.parent = &clk_hd0,
.enable = s5pc100_clk_d01_ctrl,
.ctrlbit = S5PC100_CLKGATE_D01_INTMEM,
}, {
.name = "ebi",
.id = -1,
.parent = &clk_hd0,
.enable = s5pc100_clk_d01_ctrl,
.ctrlbit = S5PC100_CLKGATE_D01_EBI,
},
/* System2 (D0_2) devices */
{
.name = "seckey",
.id = -1,
.parent = &clk_pd0,
.enable = s5pc100_clk_d02_ctrl,
.ctrlbit = S5PC100_CLKGATE_D02_SECKEY,
}, {
.name = "sdm",
.id = -1,
.parent = &clk_hd0,
.enable = s5pc100_clk_d02_ctrl,
.ctrlbit = S5PC100_CLKGATE_D02_SDM,
},
/* File (D1_0) devices */
{
.name = "pdma",
.id = 0,
.parent = &clk_h,
.enable = s5pc100_clk_d10_ctrl,
.ctrlbit = S5PC100_CLKGATE_D10_PDMA0,
}, {
.name = "pdma",
.id = 1,
.parent = &clk_h,
.enable = s5pc100_clk_d10_ctrl,
.ctrlbit = S5PC100_CLKGATE_D10_PDMA1,
}, {
.name = "usb-host",
.id = -1,
.parent = &clk_h,
.enable = s5pc100_clk_d10_ctrl,
.ctrlbit = S5PC100_CLKGATE_D10_USBHOST,
}, {
.name = "otg",
.id = -1,
.parent = &clk_h,
.enable = s5pc100_clk_d10_ctrl,
.ctrlbit = S5PC100_CLKGATE_D10_USBOTG,
}, {
.name = "modem",
.id = -1,
.parent = &clk_h,
.enable = s5pc100_clk_d10_ctrl,
.ctrlbit = S5PC100_CLKGATE_D10_MODEMIF,
}, {
.name = "hsmmc",
.id = 0,
.parent = &clk_48m,
.enable = s5pc100_clk_d10_ctrl,
.ctrlbit = S5PC100_CLKGATE_D10_HSMMC0,
}, {
.name = "hsmmc",
.id = 1,
.parent = &clk_48m,
.enable = s5pc100_clk_d10_ctrl,
.ctrlbit = S5PC100_CLKGATE_D10_HSMMC1,
}, {
.name = "hsmmc",
.id = 2,
.parent = &clk_48m,
.enable = s5pc100_clk_d10_ctrl,
.ctrlbit = S5PC100_CLKGATE_D10_HSMMC2,
},
/* Multimedia1 (D1_1) devices */
{
.name = "lcd",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d11_ctrl,
.ctrlbit = S5PC100_CLKGATE_D11_LCD,
}, {
.name = "rotator",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d11_ctrl,
.ctrlbit = S5PC100_CLKGATE_D11_ROTATOR,
}, {
.name = "fimc",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d11_ctrl,
.ctrlbit = S5PC100_CLKGATE_D11_FIMC0,
}, {
.name = "fimc",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d11_ctrl,
.ctrlbit = S5PC100_CLKGATE_D11_FIMC1,
}, {
.name = "fimc",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d11_ctrl,
.ctrlbit = S5PC100_CLKGATE_D11_FIMC2,
}, {
.name = "jpeg",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d11_ctrl,
.ctrlbit = S5PC100_CLKGATE_D11_JPEG,
}, {
.name = "g3d",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d11_ctrl,
.ctrlbit = S5PC100_CLKGATE_D11_G3D,
},
/* Multimedia2 (D1_2) devices */
{
.name = "tv",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d12_ctrl,
.ctrlbit = S5PC100_CLKGATE_D12_TV,
}, {
.name = "vp",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d12_ctrl,
.ctrlbit = S5PC100_CLKGATE_D12_VP,
}, {
.name = "mixer",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d12_ctrl,
.ctrlbit = S5PC100_CLKGATE_D12_MIXER,
}, {
.name = "hdmi",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d12_ctrl,
.ctrlbit = S5PC100_CLKGATE_D12_HDMI,
}, {
.name = "mfc",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d12_ctrl,
.ctrlbit = S5PC100_CLKGATE_D12_MFC,
},
/* System (D1_3) devices */
{
.name = "chipid",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d13_ctrl,
.ctrlbit = S5PC100_CLKGATE_D13_CHIPID,
}, {
.name = "gpio",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d13_ctrl,
.ctrlbit = S5PC100_CLKGATE_D13_GPIO,
}, {
.name = "apc",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d13_ctrl,
.ctrlbit = S5PC100_CLKGATE_D13_APC,
}, {
.name = "iec",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d13_ctrl,
.ctrlbit = S5PC100_CLKGATE_D13_IEC,
}, {
.name = "timers",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d13_ctrl,
.ctrlbit = S5PC100_CLKGATE_D13_PWM,
}, {
.name = "systimer",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d13_ctrl,
.ctrlbit = S5PC100_CLKGATE_D13_SYSTIMER,
}, {
.name = "watchdog",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d13_ctrl,
.ctrlbit = S5PC100_CLKGATE_D13_WDT,
}, {
.name = "rtc",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d13_ctrl,
.ctrlbit = S5PC100_CLKGATE_D13_RTC,
},
/* Connectivity (D1_4) devices */
{
.name = "uart",
.id = 0,
.parent = &clk_p,
.enable = s5pc100_clk_d14_ctrl,
.ctrlbit = S5PC100_CLKGATE_D14_UART0,
}, {
.name = "uart",
.id = 1,
.parent = &clk_p,
.enable = s5pc100_clk_d14_ctrl,
.ctrlbit = S5PC100_CLKGATE_D14_UART1,
}, {
.name = "uart",
.id = 2,
.parent = &clk_p,
.enable = s5pc100_clk_d14_ctrl,
.ctrlbit = S5PC100_CLKGATE_D14_UART2,
}, {
.name = "uart",
.id = 3,
.parent = &clk_p,
.enable = s5pc100_clk_d14_ctrl,
.ctrlbit = S5PC100_CLKGATE_D14_UART3,
}, {
.name = "i2c",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d14_ctrl,
.ctrlbit = S5PC100_CLKGATE_D14_IIC,
}, {
.name = "hdmi-i2c",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d14_ctrl,
.ctrlbit = S5PC100_CLKGATE_D14_HDMI_IIC,
}, {
.name = "spi",
.id = 0,
.parent = &clk_p,
.enable = s5pc100_clk_d14_ctrl,
.ctrlbit = S5PC100_CLKGATE_D14_SPI0,
}, {
.name = "spi",
.id = 1,
.parent = &clk_p,
.enable = s5pc100_clk_d14_ctrl,
.ctrlbit = S5PC100_CLKGATE_D14_SPI1,
}, {
.name = "spi",
.id = 2,
.parent = &clk_p,
.enable = s5pc100_clk_d14_ctrl,
.ctrlbit = S5PC100_CLKGATE_D14_SPI2,
}, {
.name = "irda",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d14_ctrl,
.ctrlbit = S5PC100_CLKGATE_D14_IRDA,
}, {
.name = "hsitx",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d14_ctrl,
.ctrlbit = S5PC100_CLKGATE_D14_HSITX,
}, {
.name = "hsirx",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d14_ctrl,
.ctrlbit = S5PC100_CLKGATE_D14_HSIRX,
},
/* Audio (D1_5) devices */
{
.name = "iis",
.id = 0,
.parent = &clk_p,
.enable = s5pc100_clk_d15_ctrl,
.ctrlbit = S5PC100_CLKGATE_D15_IIS0,
}, {
.name = "iis",
.id = 1,
.parent = &clk_p,
.enable = s5pc100_clk_d15_ctrl,
.ctrlbit = S5PC100_CLKGATE_D15_IIS1,
}, {
.name = "iis",
.id = 2,
.parent = &clk_p,
.enable = s5pc100_clk_d15_ctrl,
.ctrlbit = S5PC100_CLKGATE_D15_IIS2,
}, {
.name = "ac97",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d15_ctrl,
.ctrlbit = S5PC100_CLKGATE_D15_AC97,
}, {
.name = "pcm",
.id = 0,
.parent = &clk_p,
.enable = s5pc100_clk_d15_ctrl,
.ctrlbit = S5PC100_CLKGATE_D15_PCM0,
}, {
.name = "pcm",
.id = 1,
.parent = &clk_p,
.enable = s5pc100_clk_d15_ctrl,
.ctrlbit = S5PC100_CLKGATE_D15_PCM1,
}, {
.name = "spdif",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d15_ctrl,
.ctrlbit = S5PC100_CLKGATE_D15_SPDIF,
}, {
.name = "adc",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d15_ctrl,
.ctrlbit = S5PC100_CLKGATE_D15_TSADC,
}, {
.name = "cg",
.id = -1,
.parent = &clk_p,
.enable = s5pc100_clk_d15_ctrl,
.ctrlbit = S5PC100_CLKGATE_D15_CG,
},
/* Audio (D2_0) devices: all disabled */
/* Special Clocks 0 */
{
.name = "sclk_hpm",
.id = -1,
.parent = NULL,
.enable = s5pc100_sclk0_ctrl,
.ctrlbit = S5PC100_CLKGATE_SCLK0_HPM,
}, {
.name = "sclk_onenand",
.id = -1,
.parent = NULL,
.enable = s5pc100_sclk0_ctrl,
.ctrlbit = S5PC100_CLKGATE_SCLK0_ONENAND,
}, {
.name = "spi_48",
.id = 0,
.parent = &clk_48m,
.enable = s5pc100_sclk0_ctrl,
.ctrlbit = S5PC100_CLKGATE_SCLK0_SPI0_48,
}, {
.name = "spi_48",
.id = 1,
.parent = &clk_48m,
.enable = s5pc100_sclk0_ctrl,
.ctrlbit = S5PC100_CLKGATE_SCLK0_SPI1_48,
}, {
.name = "spi_48",
.id = 2,
.parent = &clk_48m,
.enable = s5pc100_sclk0_ctrl,
.ctrlbit = S5PC100_CLKGATE_SCLK0_SPI2_48,
}, {
.name = "mmc_48",
.id = 0,
.parent = &clk_48m,
.enable = s5pc100_sclk0_ctrl,
.ctrlbit = S5PC100_CLKGATE_SCLK0_MMC0_48,
}, {
.name = "mmc_48",
.id = 1,
.parent = &clk_48m,
.enable = s5pc100_sclk0_ctrl,
.ctrlbit = S5PC100_CLKGATE_SCLK0_MMC1_48,
}, {
.name = "mmc_48",
.id = 2,
.parent = &clk_48m,
.enable = s5pc100_sclk0_ctrl,
.ctrlbit = S5PC100_CLKGATE_SCLK0_MMC2_48,
},
/* Special Clocks 1 */
};
static struct clk *clks[] __initdata = {
&clk_ext,
&clk_epll,
&clk_27m,
&clk_48m,
&clk_54m,
};
void __init s5pc1xx_register_clocks(void)
{
struct clk *clkp;
int ret;
int ptr;
int size;
s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));
clkp = s5pc100_init_clocks;
size = ARRAY_SIZE(s5pc100_init_clocks);
for (ptr = 0; ptr < size; ptr++, clkp++) {
ret = s3c24xx_register_clock(clkp);
if (ret < 0) {
printk(KERN_ERR "Failed to register clock %s (%d)\n",
clkp->name, ret);
}
}
clkp = s5pc100_init_clocks_disable;
size = ARRAY_SIZE(s5pc100_init_clocks_disable);
for (ptr = 0; ptr < size; ptr++, clkp++) {
ret = s3c24xx_register_clock(clkp);
if (ret < 0) {
printk(KERN_ERR "Failed to register clock %s (%d)\n",
clkp->name, ret);
}
(clkp->enable)(clkp, 0);
}
s3c_pwmclk_init();
}
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