| /* |
| * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved. |
| * Copyright 2008 Juergen Beisert, kernel@pengutronix.de |
| * Copyright 2008 Martin Fuzzey, mfuzzey@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/err.h> |
| |
| #include "clk.h" |
| #include "common.h" |
| #include "hardware.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", "imx21-fb.0"); |
| clk_register_clkdev(clk[lcdc_ipg_gate], "ipg", "imx21-fb.0"); |
| clk_register_clkdev(clk[lcdc_hclk_gate], "ahb", "imx21-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, "imx21-nand.0"); |
| clk_register_clkdev(clk[dma_hclk_gate], "ahb", "imx21-dma"); |
| clk_register_clkdev(clk[dma_gate], "ipg", "imx21-dma"); |
| clk_register_clkdev(clk[wdog_gate], NULL, "imx2-wdt.0"); |
| clk_register_clkdev(clk[i2c_gate], NULL, "imx21-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(MX21_IO_ADDRESS(MX21_GPT1_BASE_ADDR), MX21_INT_GPT1); |
| |
| return 0; |
| } |
