1 // SPDX-License-Identifier: GPL-2.0 2 /***************************************************************************/ 3 4 /* 5 * m523x.c -- platform support for ColdFire 523x based boards 6 * 7 * Sub-architcture dependent initialization code for the Freescale 8 * 523x CPUs. 9 * 10 * Copyright (C) 1999-2005, Greg Ungerer (gerg@snapgear.com) 11 * Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com) 12 */ 13 14 /***************************************************************************/ 15 16 #include <linux/clkdev.h> 17 #include <linux/kernel.h> 18 #include <linux/param.h> 19 #include <linux/init.h> 20 #include <linux/io.h> 21 #include <asm/machdep.h> 22 #include <asm/coldfire.h> 23 #include <asm/mcfsim.h> 24 #include <asm/mcfclk.h> 25 26 /***************************************************************************/ 27 28 DEFINE_CLK(pll, "pll.0", MCF_CLK); 29 DEFINE_CLK(sys, "sys.0", MCF_BUSCLK); 30 31 static struct clk_lookup m523x_clk_lookup[] = { 32 CLKDEV_INIT(NULL, "pll.0", &clk_pll), 33 CLKDEV_INIT(NULL, "sys.0", &clk_sys), 34 CLKDEV_INIT("mcfpit.0", NULL, &clk_pll), 35 CLKDEV_INIT("mcfpit.1", NULL, &clk_pll), 36 CLKDEV_INIT("mcfpit.2", NULL, &clk_pll), 37 CLKDEV_INIT("mcfpit.3", NULL, &clk_pll), 38 CLKDEV_INIT("mcfuart.0", NULL, &clk_sys), 39 CLKDEV_INIT("mcfuart.1", NULL, &clk_sys), 40 CLKDEV_INIT("mcfuart.2", NULL, &clk_sys), 41 CLKDEV_INIT("mcfqspi.0", NULL, &clk_sys), 42 CLKDEV_INIT("fec.0", NULL, &clk_sys), 43 CLKDEV_INIT("imx1-i2c.0", NULL, &clk_sys), 44 }; 45 46 /***************************************************************************/ 47 48 static void __init m523x_qspi_init(void) 49 { 50 #if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) 51 u16 par; 52 53 /* setup QSPS pins for QSPI with gpio CS control */ 54 writeb(0x1f, MCFGPIO_PAR_QSPI); 55 /* and CS2 & CS3 as gpio */ 56 par = readw(MCFGPIO_PAR_TIMER); 57 par &= 0x3f3f; 58 writew(par, MCFGPIO_PAR_TIMER); 59 #endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */ 60 } 61 62 /***************************************************************************/ 63 64 static void __init m523x_i2c_init(void) 65 { 66 #if IS_ENABLED(CONFIG_I2C_IMX) 67 u8 par; 68 69 /* setup Port AS Pin Assignment Register for I2C */ 70 /* set PASPA0 to SCL and PASPA1 to SDA */ 71 par = readb(MCFGPIO_PAR_FECI2C); 72 par |= 0x0f; 73 writeb(par, MCFGPIO_PAR_FECI2C); 74 #endif /* IS_ENABLED(CONFIG_I2C_IMX) */ 75 } 76 77 /***************************************************************************/ 78 79 static void __init m523x_fec_init(void) 80 { 81 /* Set multi-function pins to ethernet use */ 82 writeb(readb(MCFGPIO_PAR_FECI2C) | 0xf0, MCFGPIO_PAR_FECI2C); 83 } 84 85 /***************************************************************************/ 86 87 void __init config_BSP(char *commandp, int size) 88 { 89 mach_sched_init = hw_timer_init; 90 m523x_fec_init(); 91 m523x_qspi_init(); 92 m523x_i2c_init(); 93 94 clkdev_add_table(m523x_clk_lookup, ARRAY_SIZE(m523x_clk_lookup)); 95 } 96 97 /***************************************************************************/ 98