[PATCH 28/33] ARM i.MX21: implement clocks using common clock framework
Sascha Hauer
s.hauer at pengutronix.de
Wed Apr 25 11:28:18 EDT 2012
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
---
arch/arm/mach-imx/Kconfig | 1 +
arch/arm/mach-imx/Makefile | 2 +-
arch/arm/mach-imx/clk-imx21.c | 186 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 188 insertions(+), 1 deletion(-)
create mode 100644 arch/arm/mach-imx/clk-imx21.c
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index c03920a..d23cebd 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -43,6 +43,7 @@ config SOC_IMX21
bool
select MACH_MX21
select CPU_ARM926T
+ select COMMON_CLK
select IMX_HAVE_IOMUX_V1
select MXC_AVIC
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index 52b3af4..a2efb79 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -1,5 +1,5 @@
obj-$(CONFIG_SOC_IMX1) += clk-imx1.o mm-imx1.o
-obj-$(CONFIG_SOC_IMX21) += clock-imx21.o mm-imx21.o
+obj-$(CONFIG_SOC_IMX21) += clk-imx21.o mm-imx21.o
obj-$(CONFIG_SOC_IMX25) += clk-imx25.o mm-imx25.o ehci-imx25.o cpu-imx25.o
diff --git a/arch/arm/mach-imx/clk-imx21.c b/arch/arm/mach-imx/clk-imx21.c
new file mode 100644
index 0000000..4e4f384
--- /dev/null
+++ b/arch/arm/mach-imx/clk-imx21.c
@@ -0,0 +1,186 @@
+/*
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008 Juergen Beisert, kernel at pengutronix.de
+ * Copyright 2008 Martin Fuzzey, mfuzzey at gmail.com
+ *
+ * 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/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/clkdev.h>
+#include <linux/err.h>
+
+#include <mach/hardware.h>
+#include <mach/common.h>
+#include "clk.h"
+
+#define IO_ADDR_CCM(off) (MX21_IO_ADDRESS(MX21_CCM_BASE_ADDR + (off)))
+
+/* Register offsets */
+#define CCM_CSCR IO_ADDR_CCM(0x0)
+#define CCM_MPCTL0 IO_ADDR_CCM(0x4)
+#define CCM_MPCTL1 IO_ADDR_CCM(0x8)
+#define CCM_SPCTL0 IO_ADDR_CCM(0xc)
+#define CCM_SPCTL1 IO_ADDR_CCM(0x10)
+#define CCM_OSC26MCTL IO_ADDR_CCM(0x14)
+#define CCM_PCDR0 IO_ADDR_CCM(0x18)
+#define CCM_PCDR1 IO_ADDR_CCM(0x1c)
+#define CCM_PCCR0 IO_ADDR_CCM(0x20)
+#define CCM_PCCR1 IO_ADDR_CCM(0x24)
+#define CCM_CCSR IO_ADDR_CCM(0x28)
+#define CCM_PMCTL IO_ADDR_CCM(0x2c)
+#define CCM_PMCOUNT IO_ADDR_CCM(0x30)
+#define CCM_WKGDCTL IO_ADDR_CCM(0x34)
+
+static const char *mpll_sel_clks[] = { "fpm", "ckih", };
+static const char *spll_sel_clks[] = { "fpm", "ckih", };
+
+enum imx21_clks {
+ ckil, ckih, fpm, mpll_sel, spll_sel, mpll, spll, fclk, hclk, ipg, per1,
+ per2, per3, per4, uart1_ipg_gate, uart2_ipg_gate, uart3_ipg_gate,
+ uart4_ipg_gate, gpt1_ipg_gate, gpt2_ipg_gate, gpt3_ipg_gate,
+ pwm_ipg_gate, sdhc1_ipg_gate, sdhc2_ipg_gate, lcdc_ipg_gate,
+ lcdc_hclk_gate, cspi3_ipg_gate, cspi2_ipg_gate, cspi1_ipg_gate,
+ per4_gate, csi_hclk_gate, usb_div, usb_gate, usb_hclk_gate, ssi1_gate,
+ ssi2_gate, nfc_div, nfc_gate, dma_gate, dma_hclk_gate, brom_gate,
+ emma_gate, emma_hclk_gate, slcdc_gate, slcdc_hclk_gate, wdog_gate,
+ gpio_gate, i2c_gate, kpp_gate, owire_gate, rtc_gate, clk_max
+};
+
+static struct clk *clk[clk_max];
+
+/*
+ * must be called very early to get information about the
+ * available clock rate when the timer framework starts
+ */
+int __init mx21_clocks_init(unsigned long lref, unsigned long href)
+{
+ int i;
+
+ clk[ckil] = imx_clk_fixed("ckil", lref);
+ clk[ckih] = imx_clk_fixed("ckih", href);
+ clk[fpm] = imx_clk_fixed_factor("fpm", "ckil", 512, 1);
+ clk[mpll_sel] = imx_clk_mux("mpll_sel", CCM_CSCR, 16, 1, mpll_sel_clks,
+ ARRAY_SIZE(mpll_sel_clks));
+ clk[spll_sel] = imx_clk_mux("spll_sel", CCM_CSCR, 17, 1, spll_sel_clks,
+ ARRAY_SIZE(spll_sel_clks));
+ clk[mpll] = imx_clk_pllv1("mpll", "mpll_sel", CCM_MPCTL0);
+ clk[spll] = imx_clk_pllv1("spll", "spll_sel", CCM_SPCTL0);
+ clk[fclk] = imx_clk_divider("fclk", "mpll", CCM_CSCR, 29, 3);
+ clk[hclk] = imx_clk_divider("hclk", "fclk", CCM_CSCR, 10, 4);
+ clk[ipg] = imx_clk_divider("ipg", "hclk", CCM_CSCR, 9, 1);
+ clk[per1] = imx_clk_divider("per1", "mpll", CCM_PCDR1, 0, 6);
+ clk[per2] = imx_clk_divider("per2", "mpll", CCM_PCDR1, 8, 6);
+ clk[per3] = imx_clk_divider("per3", "mpll", CCM_PCDR1, 16, 6);
+ clk[per4] = imx_clk_divider("per4", "mpll", CCM_PCDR1, 24, 6);
+ clk[uart1_ipg_gate] = imx_clk_gate("uart1_ipg_gate", "ipg", CCM_PCCR0, 0);
+ clk[uart2_ipg_gate] = imx_clk_gate("uart2_ipg_gate", "ipg", CCM_PCCR0, 1);
+ clk[uart3_ipg_gate] = imx_clk_gate("uart3_ipg_gate", "ipg", CCM_PCCR0, 2);
+ clk[uart4_ipg_gate] = imx_clk_gate("uart4_ipg_gate", "ipg", CCM_PCCR0, 3);
+ clk[gpt1_ipg_gate] = imx_clk_gate("gpt1_ipg_gate", "ipg", CCM_PCCR1, 25);
+ clk[gpt2_ipg_gate] = imx_clk_gate("gpt2_ipg_gate", "ipg", CCM_PCCR1, 26);
+ clk[gpt3_ipg_gate] = imx_clk_gate("gpt3_ipg_gate", "ipg", CCM_PCCR1, 27);
+ clk[pwm_ipg_gate] = imx_clk_gate("pwm_ipg_gate", "ipg", CCM_PCCR1, 28);
+ clk[sdhc1_ipg_gate] = imx_clk_gate("sdhc1_ipg_gate", "ipg", CCM_PCCR0, 9);
+ clk[sdhc2_ipg_gate] = imx_clk_gate("sdhc2_ipg_gate", "ipg", CCM_PCCR0, 10);
+ clk[lcdc_ipg_gate] = imx_clk_gate("lcdc_ipg_gate", "ipg", CCM_PCCR0, 18);
+ clk[lcdc_hclk_gate] = imx_clk_gate("lcdc_hclk_gate", "hclk", CCM_PCCR0, 26);
+ clk[cspi3_ipg_gate] = imx_clk_gate("cspi3_ipg_gate", "ipg", CCM_PCCR1, 23);
+ clk[cspi2_ipg_gate] = imx_clk_gate("cspi2_ipg_gate", "ipg", CCM_PCCR0, 5);
+ clk[cspi1_ipg_gate] = imx_clk_gate("cspi1_ipg_gate", "ipg", CCM_PCCR0, 4);
+ clk[per4_gate] = imx_clk_gate("per4_gate", "per4", CCM_PCCR0, 22);
+ clk[csi_hclk_gate] = imx_clk_gate("csi_hclk_gate", "hclk", CCM_PCCR0, 31);
+ clk[usb_div] = imx_clk_divider("usb_div", "spll", CCM_CSCR, 26, 3);
+ clk[usb_gate] = imx_clk_gate("usb_gate", "usb_div", CCM_PCCR0, 14);
+ clk[usb_hclk_gate] = imx_clk_gate("usb_hclk_gate", "hclk", CCM_PCCR0, 24);
+ clk[ssi1_gate] = imx_clk_gate("ssi1_gate", "ipg", CCM_PCCR0, 6);
+ clk[ssi2_gate] = imx_clk_gate("ssi2_gate", "ipg", CCM_PCCR0, 7);
+ clk[nfc_div] = imx_clk_divider("nfc_div", "ipg", CCM_PCDR0, 12, 4);
+ clk[nfc_gate] = imx_clk_gate("nfc_gate", "nfc_div", CCM_PCCR0, 19);
+ clk[dma_gate] = imx_clk_gate("dma_gate", "ipg", CCM_PCCR0, 13);
+ clk[dma_hclk_gate] = imx_clk_gate("dma_hclk_gate", "hclk", CCM_PCCR0, 30);
+ clk[brom_gate] = imx_clk_gate("brom_gate", "hclk", CCM_PCCR0, 28);
+ clk[emma_gate] = imx_clk_gate("emma_gate", "ipg", CCM_PCCR0, 15);
+ clk[emma_hclk_gate] = imx_clk_gate("emma_hclk_gate", "hclk", CCM_PCCR0, 27);
+ clk[slcdc_gate] = imx_clk_gate("slcdc_gate", "ipg", CCM_PCCR0, 25);
+ clk[slcdc_hclk_gate] = imx_clk_gate("slcdc_hclk_gate", "hclk", CCM_PCCR0, 21);
+ clk[wdog_gate] = imx_clk_gate("wdog_gate", "ipg", CCM_PCCR1, 24);
+ clk[gpio_gate] = imx_clk_gate("gpio_gate", "ipg", CCM_PCCR0, 11);
+ clk[i2c_gate] = imx_clk_gate("i2c_gate", "ipg", CCM_PCCR0, 12);
+ clk[kpp_gate] = imx_clk_gate("kpp_gate", "ipg", CCM_PCCR1, 30);
+ clk[owire_gate] = imx_clk_gate("owire_gate", "ipg", CCM_PCCR1, 31);
+ clk[rtc_gate] = imx_clk_gate("rtc_gate", "ipg", CCM_PCCR1, 29);
+
+ for (i = 0; i < ARRAY_SIZE(clk); i++)
+ if (IS_ERR(clk[i]))
+ pr_err("i.MX21 clk %d: register failed with %ld\n",
+ i, PTR_ERR(clk[i]));
+
+ clk_register_clkdev(clk[per1], "per1", NULL);
+ clk_register_clkdev(clk[per2], "per2", NULL);
+ clk_register_clkdev(clk[per3], "per3", NULL);
+ clk_register_clkdev(clk[per4], "per4", NULL);
+ clk_register_clkdev(clk[per1], "per", "imx21-uart.0");
+ clk_register_clkdev(clk[uart1_ipg_gate], "ipg", "imx21-uart.0");
+ clk_register_clkdev(clk[per1], "per", "imx21-uart.1");
+ clk_register_clkdev(clk[uart2_ipg_gate], "ipg", "imx21-uart.1");
+ clk_register_clkdev(clk[per1], "per", "imx21-uart.2");
+ clk_register_clkdev(clk[uart3_ipg_gate], "ipg", "imx21-uart.2");
+ clk_register_clkdev(clk[per1], "per", "imx21-uart.3");
+ clk_register_clkdev(clk[uart4_ipg_gate], "ipg", "imx21-uart.3");
+ clk_register_clkdev(clk[gpt1_ipg_gate], "ipg", "imx-gpt.0");
+ clk_register_clkdev(clk[per1], "per", "imx-gpt.0");
+ clk_register_clkdev(clk[gpt2_ipg_gate], "ipg", "imx-gpt.1");
+ clk_register_clkdev(clk[per1], "per", "imx-gpt.1");
+ clk_register_clkdev(clk[gpt3_ipg_gate], "ipg", "imx-gpt.2");
+ clk_register_clkdev(clk[per1], "per", "imx-gpt.2");
+ clk_register_clkdev(clk[pwm_ipg_gate], "pwm", "mxc_pwm.0");
+ clk_register_clkdev(clk[per2], "per", "imx21-cspi.0");
+ clk_register_clkdev(clk[cspi1_ipg_gate], "ipg", "imx21-cspi.0");
+ clk_register_clkdev(clk[per2], "per", "imx21-cspi.1");
+ clk_register_clkdev(clk[cspi2_ipg_gate], "ipg", "imx21-cspi.1");
+ clk_register_clkdev(clk[per2], "per", "imx21-cspi.2");
+ clk_register_clkdev(clk[cspi3_ipg_gate], "ipg", "imx21-cspi.2");
+ clk_register_clkdev(clk[per3], "per", "imx-fb.0");
+ clk_register_clkdev(clk[lcdc_ipg_gate], "ipg", "imx-fb.0");
+ clk_register_clkdev(clk[lcdc_hclk_gate], "ahb", "imx-fb.0");
+ clk_register_clkdev(clk[usb_gate], "per", "imx21-hcd.0");
+ clk_register_clkdev(clk[usb_hclk_gate], "ahb", "imx21-hcd.0");
+ clk_register_clkdev(clk[nfc_gate], NULL, "mxc_nand.0");
+ clk_register_clkdev(clk[dma_hclk_gate], "ahb", "imx-dma");
+ clk_register_clkdev(clk[dma_gate], "ipg", "imx-dma");
+ clk_register_clkdev(clk[wdog_gate], NULL, "imx2-wdt.0");
+ clk_register_clkdev(clk[i2c_gate], NULL, "imx-i2c.0");
+ clk_register_clkdev(clk[kpp_gate], NULL, "mxc-keypad");
+ clk_register_clkdev(clk[owire_gate], NULL, "mxc_w1.0");
+ clk_register_clkdev(clk[brom_gate], "brom", NULL);
+ clk_register_clkdev(clk[emma_gate], "emma", NULL);
+ clk_register_clkdev(clk[slcdc_gate], "slcdc", NULL);
+ clk_register_clkdev(clk[gpio_gate], "gpio", NULL);
+ clk_register_clkdev(clk[rtc_gate], "rtc", NULL);
+ clk_register_clkdev(clk[csi_hclk_gate], "csi", NULL);
+ clk_register_clkdev(clk[ssi1_gate], "ssi1", NULL);
+ clk_register_clkdev(clk[ssi2_gate], "ssi2", NULL);
+ clk_register_clkdev(clk[sdhc1_ipg_gate], "sdhc1", NULL);
+ clk_register_clkdev(clk[sdhc2_ipg_gate], "sdhc2", NULL);
+
+ mxc_timer_init(NULL, MX21_IO_ADDRESS(MX21_GPT1_BASE_ADDR),
+ MX21_INT_GPT1);
+ return 0;
+}
--
1.7.10
More information about the linux-arm-kernel
mailing list