| // SPDX-License-Identifier: GPL-2.0 |
| /***************************************************************************/ |
| |
| /* |
| * m523x.c -- platform support for ColdFire 523x based boards |
| * |
| * Sub-architcture dependent initialization code for the Freescale |
| * 523x CPUs. |
| * |
| * Copyright (C) 1999-2005, Greg Ungerer (gerg@snapgear.com) |
| * Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com) |
| */ |
| |
| /***************************************************************************/ |
| |
| #include <linux/clkdev.h> |
| #include <linux/kernel.h> |
| #include <linux/param.h> |
| #include <linux/init.h> |
| #include <linux/io.h> |
| #include <asm/machdep.h> |
| #include <asm/coldfire.h> |
| #include <asm/mcfsim.h> |
| #include <asm/mcfclk.h> |
| |
| /***************************************************************************/ |
| |
| DEFINE_CLK(pll, "pll.0", MCF_CLK); |
| DEFINE_CLK(sys, "sys.0", MCF_BUSCLK); |
| |
| static struct clk_lookup m523x_clk_lookup[] = { |
| CLKDEV_INIT(NULL, "pll.0", &clk_pll), |
| CLKDEV_INIT(NULL, "sys.0", &clk_sys), |
| CLKDEV_INIT("mcfpit.0", NULL, &clk_pll), |
| CLKDEV_INIT("mcfpit.1", NULL, &clk_pll), |
| CLKDEV_INIT("mcfpit.2", NULL, &clk_pll), |
| CLKDEV_INIT("mcfpit.3", NULL, &clk_pll), |
| CLKDEV_INIT("mcfuart.0", NULL, &clk_sys), |
| CLKDEV_INIT("mcfuart.1", NULL, &clk_sys), |
| CLKDEV_INIT("mcfuart.2", NULL, &clk_sys), |
| CLKDEV_INIT("mcfqspi.0", NULL, &clk_sys), |
| CLKDEV_INIT("fec.0", NULL, &clk_sys), |
| CLKDEV_INIT("imx1-i2c.0", NULL, &clk_sys), |
| }; |
| |
| /***************************************************************************/ |
| |
| static void __init m523x_qspi_init(void) |
| { |
| #if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) |
| u16 par; |
| |
| /* setup QSPS pins for QSPI with gpio CS control */ |
| writeb(0x1f, MCFGPIO_PAR_QSPI); |
| /* and CS2 & CS3 as gpio */ |
| par = readw(MCFGPIO_PAR_TIMER); |
| par &= 0x3f3f; |
| writew(par, MCFGPIO_PAR_TIMER); |
| #endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */ |
| } |
| |
| /***************************************************************************/ |
| |
| static void __init m523x_i2c_init(void) |
| { |
| #if IS_ENABLED(CONFIG_I2C_IMX) |
| u8 par; |
| |
| /* setup Port AS Pin Assignment Register for I2C */ |
| /* set PASPA0 to SCL and PASPA1 to SDA */ |
| par = readb(MCFGPIO_PAR_FECI2C); |
| par |= 0x0f; |
| writeb(par, MCFGPIO_PAR_FECI2C); |
| #endif /* IS_ENABLED(CONFIG_I2C_IMX) */ |
| } |
| |
| /***************************************************************************/ |
| |
| static void __init m523x_fec_init(void) |
| { |
| /* Set multi-function pins to ethernet use */ |
| writeb(readb(MCFGPIO_PAR_FECI2C) | 0xf0, MCFGPIO_PAR_FECI2C); |
| } |
| |
| /***************************************************************************/ |
| |
| void __init config_BSP(char *commandp, int size) |
| { |
| mach_sched_init = hw_timer_init; |
| m523x_fec_init(); |
| m523x_qspi_init(); |
| m523x_i2c_init(); |
| |
| clkdev_add_table(m523x_clk_lookup, ARRAY_SIZE(m523x_clk_lookup)); |
| } |
| |
| /***************************************************************************/ |
