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[ARM] MXC: Switch MX1 to clkdev support
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Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Sascha Hauer committed Aug 7, 2009
1 parent 6d73665 commit 7dae113
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Showing 2 changed files with 29 additions and 56 deletions.
84 changes: 28 additions & 56 deletions arch/arm/mach-mx1/clock.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -18,11 +18,14 @@

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/math64.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/io.h>

#include <asm/clkdev.h>

#include <mach/clock.h>
#include <mach/hardware.h>
#include <mach/common.h>
Expand Down Expand Up @@ -94,7 +97,6 @@ static unsigned long clk16m_get_rate(struct clk *clk)
}

static struct clk clk16m = {
.name = "CLK16M",
.get_rate = clk16m_get_rate,
.enable = _clk_enable,
.enable_reg = CCM_CSCR,
Expand All @@ -111,7 +113,6 @@ static unsigned long clk32_get_rate(struct clk *clk)
}

static struct clk clk32 = {
.name = "CLK32",
.get_rate = clk32_get_rate,
};

Expand All @@ -121,7 +122,6 @@ static unsigned long clk32_premult_get_rate(struct clk *clk)
}

static struct clk clk32_premult = {
.name = "CLK32_premultiplier",
.parent = &clk32,
.get_rate = clk32_premult_get_rate,
};
Expand Down Expand Up @@ -156,7 +156,6 @@ static int prem_clk_set_parent(struct clk *clk, struct clk *parent)
}

static struct clk prem_clk = {
.name = "prem_clk",
.set_parent = prem_clk_set_parent,
};

Expand All @@ -167,7 +166,6 @@ static unsigned long system_clk_get_rate(struct clk *clk)
}

static struct clk system_clk = {
.name = "system_clk",
.parent = &prem_clk,
.get_rate = system_clk_get_rate,
};
Expand All @@ -179,7 +177,6 @@ static unsigned long mcu_clk_get_rate(struct clk *clk)
}

static struct clk mcu_clk = {
.name = "mcu_clk",
.parent = &clk32_premult,
.get_rate = mcu_clk_get_rate,
};
Expand All @@ -195,7 +192,6 @@ static unsigned long fclk_get_rate(struct clk *clk)
}

static struct clk fclk = {
.name = "fclk",
.parent = &mcu_clk,
.get_rate = fclk_get_rate,
};
Expand Down Expand Up @@ -238,7 +234,6 @@ static int hclk_set_rate(struct clk *clk, unsigned long rate)
}

static struct clk hclk = {
.name = "hclk",
.parent = &system_clk,
.get_rate = hclk_get_rate,
.round_rate = hclk_round_rate,
Expand Down Expand Up @@ -280,7 +275,6 @@ static int clk48m_set_rate(struct clk *clk, unsigned long rate)
}

static struct clk clk48m = {
.name = "CLK48M",
.parent = &system_clk,
.get_rate = clk48m_get_rate,
.round_rate = clk48m_round_rate,
Expand Down Expand Up @@ -400,21 +394,18 @@ static int perclk3_set_rate(struct clk *clk, unsigned long rate)

static struct clk perclk[] = {
{
.name = "perclk",
.id = 0,
.parent = &system_clk,
.get_rate = perclk1_get_rate,
.round_rate = perclk1_round_rate,
.set_rate = perclk1_set_rate,
}, {
.name = "perclk",
.id = 1,
.parent = &system_clk,
.get_rate = perclk2_get_rate,
.round_rate = perclk2_round_rate,
.set_rate = perclk2_set_rate,
}, {
.name = "perclk",
.id = 2,
.parent = &system_clk,
.get_rate = perclk3_get_rate,
Expand Down Expand Up @@ -457,12 +448,10 @@ static int clko_set_parent(struct clk *clk, struct clk *parent)
}

static struct clk clko_clk = {
.name = "clko_clk",
.set_parent = clko_set_parent,
};

static struct clk dma_clk = {
.name = "dma",
.parent = &hclk,
.round_rate = _clk_parent_round_rate,
.set_rate = _clk_parent_set_rate,
Expand All @@ -473,7 +462,6 @@ static struct clk dma_clk = {
};

static struct clk csi_clk = {
.name = "csi_clk",
.parent = &hclk,
.round_rate = _clk_parent_round_rate,
.set_rate = _clk_parent_set_rate,
Expand All @@ -484,7 +472,6 @@ static struct clk csi_clk = {
};

static struct clk mma_clk = {
.name = "mma_clk",
.parent = &hclk,
.round_rate = _clk_parent_round_rate,
.set_rate = _clk_parent_set_rate,
Expand All @@ -495,7 +482,6 @@ static struct clk mma_clk = {
};

static struct clk usbd_clk = {
.name = "usbd_clk",
.parent = &clk48m,
.round_rate = _clk_parent_round_rate,
.set_rate = _clk_parent_set_rate,
Expand All @@ -506,99 +492,85 @@ static struct clk usbd_clk = {
};

static struct clk gpt_clk = {
.name = "gpt_clk",
.parent = &perclk[0],
.round_rate = _clk_parent_round_rate,
.set_rate = _clk_parent_set_rate,
};

static struct clk uart_clk = {
.name = "uart",
.parent = &perclk[0],
.round_rate = _clk_parent_round_rate,
.set_rate = _clk_parent_set_rate,
};

static struct clk i2c_clk = {
.name = "i2c_clk",
.parent = &hclk,
.round_rate = _clk_parent_round_rate,
.set_rate = _clk_parent_set_rate,
};

static struct clk spi_clk = {
.name = "spi_clk",
.parent = &perclk[1],
.round_rate = _clk_parent_round_rate,
.set_rate = _clk_parent_set_rate,
};

static struct clk sdhc_clk = {
.name = "sdhc_clk",
.parent = &perclk[1],
.round_rate = _clk_parent_round_rate,
.set_rate = _clk_parent_set_rate,
};

static struct clk lcdc_clk = {
.name = "lcdc_clk",
.parent = &perclk[1],
.round_rate = _clk_parent_round_rate,
.set_rate = _clk_parent_set_rate,
};

static struct clk mshc_clk = {
.name = "mshc_clk",
.parent = &hclk,
.round_rate = _clk_parent_round_rate,
.set_rate = _clk_parent_set_rate,
};

static struct clk ssi_clk = {
.name = "ssi_clk",
.parent = &perclk[2],
.round_rate = _clk_parent_round_rate,
.set_rate = _clk_parent_set_rate,
};

static struct clk rtc_clk = {
.name = "rtc_clk",
.parent = &clk32,
};

static struct clk *mxc_clks[] = {
&clk16m,
&clk32,
&clk32_premult,
&prem_clk,
&system_clk,
&mcu_clk,
&fclk,
&hclk,
&clk48m,
&perclk[0],
&perclk[1],
&perclk[2],
&clko_clk,
&dma_clk,
&csi_clk,
&mma_clk,
&usbd_clk,
&gpt_clk,
&uart_clk,
&i2c_clk,
&spi_clk,
&sdhc_clk,
&lcdc_clk,
&mshc_clk,
&ssi_clk,
&rtc_clk,
#define _REGISTER_CLOCK(d, n, c) \
{ \
.dev_id = d, \
.con_id = n, \
.clk = &c, \
},
static struct clk_lookup lookups[] __initdata = {
_REGISTER_CLOCK(NULL, "dma", dma_clk)
_REGISTER_CLOCK("mx1-camera.0", NULL, csi_clk)
_REGISTER_CLOCK(NULL, "mma", mma_clk)
_REGISTER_CLOCK("imx_udc.0", NULL, usbd_clk)
_REGISTER_CLOCK(NULL, "gpt", gpt_clk)
_REGISTER_CLOCK("imx-uart.0", NULL, uart_clk)
_REGISTER_CLOCK("imx-uart.1", NULL, uart_clk)
_REGISTER_CLOCK("imx-uart.2", NULL, uart_clk)
_REGISTER_CLOCK("imx-i2c.0", NULL, i2c_clk)
_REGISTER_CLOCK("spi_imx.0", NULL, spi_clk)
_REGISTER_CLOCK("imx-mmc.0", NULL, sdhc_clk)
_REGISTER_CLOCK("imx-fb.0", NULL, lcdc_clk)
_REGISTER_CLOCK(NULL, "mshc", mshc_clk)
_REGISTER_CLOCK(NULL, "ssi", ssi_clk)
_REGISTER_CLOCK("mxc_rtc.0", NULL, rtc_clk)
};

int __init mx1_clocks_init(unsigned long fref)
{
struct clk **clkp;
unsigned int reg;
int i;

/* disable clocks we are able to */
__raw_writel(0, SCM_GCCR);
Expand All @@ -620,8 +592,8 @@ int __init mx1_clocks_init(unsigned long fref)
reg = (reg & CCM_CSCR_CLKO_MASK) >> CCM_CSCR_CLKO_OFFSET;
clko_clk.parent = (struct clk *)clko_clocks[reg];

for (clkp = mxc_clks; clkp < mxc_clks + ARRAY_SIZE(mxc_clks); clkp++)
clk_register(*clkp);
for (i = 0; i < ARRAY_SIZE(lookups); i++)
clkdev_add(&lookups[i]);

clk_enable(&hclk);
clk_enable(&fclk);
Expand Down
1 change: 1 addition & 0 deletions arch/arm/plat-mxc/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ choice
config ARCH_MX1
bool "MX1-based"
select CPU_ARM920T
select COMMON_CLKDEV
help
This enables support for systems based on the Freescale i.MX1 family

Expand Down

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