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ARM i.MX1: implement clocks using common clock framework

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This also changes the DMA clkdev lookup to use the imx-dma driver name
and "ahb" as connection ID to request the hclk dma clock.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Sascha Hauer 2012-03-09 09:11:32 +01:00
parent 6bbaec5676
commit cd73785fb7
3 changed files with 117 additions and 1 deletions
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1
arch/arm/mach-imx/Kconfig
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@ -34,6 +34,7 @@ config ARCH_MX53
config SOC_IMX1
bool
select ARCH_MX1
select COMMON_CLK
select CPU_ARM920T
select IMX_HAVE_IOMUX_V1
select MXC_AVIC

2
arch/arm/mach-imx/Makefile
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@ -1,4 +1,4 @@
obj-$(CONFIG_SOC_IMX1) += clock-imx1.o mm-imx1.o
obj-$(CONFIG_SOC_IMX1) += clk-imx1.o mm-imx1.o
obj-$(CONFIG_SOC_IMX21) += clock-imx21.o mm-imx21.o
obj-$(CONFIG_SOC_IMX25) += clk-imx25.o mm-imx25.o ehci-imx25.o cpu-imx25.o

115
arch/arm/mach-imx/clk-imx1.c Normal file
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@ -0,0 +1,115 @@
/*
* Copyright (C) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*
* 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.
*
* 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 St, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/clkdev.h>
#include <linux/err.h>
#include <mach/hardware.h>
#include <mach/common.h>
#include "clk.h"
/* CCM register addresses */
#define IO_ADDR_CCM(off) (MX1_IO_ADDRESS(MX1_CCM_BASE_ADDR + (off)))
#define CCM_CSCR IO_ADDR_CCM(0x0)
#define CCM_MPCTL0 IO_ADDR_CCM(0x4)
#define CCM_SPCTL0 IO_ADDR_CCM(0xc)
#define CCM_PCDR IO_ADDR_CCM(0x20)
/* SCM register addresses */
#define IO_ADDR_SCM(off) (MX1_IO_ADDRESS(MX1_SCM_BASE_ADDR + (off)))
#define SCM_GCCR IO_ADDR_SCM(0xc)
static const char *prem_sel_clks[] = { "clk32_premult", "clk16m", };
static const char *clko_sel_clks[] = { "per1", "hclk", "clk48m", "clk16m", "prem",
"fclk", };
enum imx1_clks {
dummy, clk32, clk16m_ext, clk16m, clk32_premult, prem, mpll, spll, mcu,
fclk, hclk, clk48m, per1, per2, per3, clko, dma_gate, csi_gate,
mma_gate, usbd_gate, clk_max
};
static struct clk *clk[clk_max];
int __init mx1_clocks_init(unsigned long fref)
{
int i;
clk[dummy] = imx_clk_fixed("dummy", 0);
clk[clk32] = imx_clk_fixed("clk32", fref);
clk[clk16m_ext] = imx_clk_fixed("clk16m_ext", 16000000);
clk[clk16m] = imx_clk_gate("clk16m", "clk16m_ext", CCM_CSCR, 17);
clk[clk32_premult] = imx_clk_fixed_factor("clk32_premult", "clk32", 512, 1);
clk[prem] = imx_clk_mux("prem", CCM_CSCR, 16, 1, prem_sel_clks,
ARRAY_SIZE(prem_sel_clks));
clk[mpll] = imx_clk_pllv1("mpll", "clk32_premult", CCM_MPCTL0);
clk[spll] = imx_clk_pllv1("spll", "prem", CCM_SPCTL0);
clk[mcu] = imx_clk_divider("mcu", "clk32_premult", CCM_CSCR, 15, 1);
clk[fclk] = imx_clk_divider("fclk", "mpll", CCM_CSCR, 15, 1);
clk[hclk] = imx_clk_divider("hclk", "spll", CCM_CSCR, 10, 4);
clk[clk48m] = imx_clk_divider("clk48m", "spll", CCM_CSCR, 26, 3);
clk[per1] = imx_clk_divider("per1", "spll", CCM_PCDR, 0, 4);
clk[per2] = imx_clk_divider("per2", "spll", CCM_PCDR, 4, 4);
clk[per3] = imx_clk_divider("per3", "spll", CCM_PCDR, 16, 7);
clk[clko] = imx_clk_mux("clko", CCM_CSCR, 29, 3, clko_sel_clks,
ARRAY_SIZE(clko_sel_clks));
clk[dma_gate] = imx_clk_gate("dma_gate", "hclk", SCM_GCCR, 4);
clk[csi_gate] = imx_clk_gate("csi_gate", "hclk", SCM_GCCR, 2);
clk[mma_gate] = imx_clk_gate("mma_gate", "hclk", SCM_GCCR, 1);
clk[usbd_gate] = imx_clk_gate("usbd_gate", "clk48m", SCM_GCCR, 0);
for (i = 0; i < ARRAY_SIZE(clk); i++)
if (IS_ERR(clk[i]))
pr_err("imx1 clk %d: register failed with %ld\n",
i, PTR_ERR(clk[i]));
clk_register_clkdev(clk[dma_gate], "ahb", "imx-dma");
clk_register_clkdev(clk[csi_gate], NULL, "mx1-camera.0");
clk_register_clkdev(clk[mma_gate], "mma", NULL);
clk_register_clkdev(clk[usbd_gate], NULL, "imx_udc.0");
clk_register_clkdev(clk[per1], "per", "imx-gpt.0");
clk_register_clkdev(clk[hclk], "ipg", "imx-gpt.0");
clk_register_clkdev(clk[per1], "per", "imx1-uart.0");
clk_register_clkdev(clk[hclk], "ipg", "imx1-uart.0");
clk_register_clkdev(clk[per1], "per", "imx1-uart.1");
clk_register_clkdev(clk[hclk], "ipg", "imx1-uart.1");
clk_register_clkdev(clk[per1], "per", "imx1-uart.2");
clk_register_clkdev(clk[hclk], "ipg", "imx1-uart.2");
clk_register_clkdev(clk[hclk], NULL, "imx-i2c.0");
clk_register_clkdev(clk[per2], "per", "imx1-cspi.0");
clk_register_clkdev(clk[dummy], "ipg", "imx1-cspi.0");
clk_register_clkdev(clk[per2], "per", "imx1-cspi.1");
clk_register_clkdev(clk[dummy], "ipg", "imx1-cspi.1");
clk_register_clkdev(clk[per2], NULL, "imx-mmc.0");
clk_register_clkdev(clk[per2], "per", "imx-fb.0");
clk_register_clkdev(clk[dummy], "ipg", "imx-fb.0");
clk_register_clkdev(clk[dummy], "ahb", "imx-fb.0");
clk_register_clkdev(clk[hclk], "mshc", NULL);
clk_register_clkdev(clk[per3], "ssi", NULL);
clk_register_clkdev(clk[clk32], NULL, "mxc_rtc.0");
clk_register_clkdev(clk[clko], "clko", NULL);
mxc_timer_init(NULL, MX1_IO_ADDRESS(MX1_TIM1_BASE_ADDR),
MX1_TIM1_INT);
return 0;
}