| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 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/kernel.h> |
| 17 | #include <linux/param.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/io.h> |
| 20 | #include <asm/machdep.h> |
| 21 | #include <asm/coldfire.h> |
| 22 | #include <asm/mcfsim.h> |
| 23 | #include <asm/mcfclk.h> |
| 24 | |
| 25 | /***************************************************************************/ |
| 26 | |
| 27 | DEFINE_CLK(pll, "pll.0", MCF_CLK); |
| 28 | DEFINE_CLK(sys, "sys.0", MCF_BUSCLK); |
| 29 | DEFINE_CLK(mcfpit0, "mcfpit.0", MCF_CLK); |
| 30 | DEFINE_CLK(mcfpit1, "mcfpit.1", MCF_CLK); |
| 31 | DEFINE_CLK(mcfpit2, "mcfpit.2", MCF_CLK); |
| 32 | DEFINE_CLK(mcfpit3, "mcfpit.3", MCF_CLK); |
| 33 | DEFINE_CLK(mcfuart0, "mcfuart.0", MCF_BUSCLK); |
| 34 | DEFINE_CLK(mcfuart1, "mcfuart.1", MCF_BUSCLK); |
| 35 | DEFINE_CLK(mcfuart2, "mcfuart.2", MCF_BUSCLK); |
| 36 | DEFINE_CLK(mcfqspi0, "mcfqspi.0", MCF_BUSCLK); |
| 37 | DEFINE_CLK(fec0, "fec.0", MCF_BUSCLK); |
| 38 | DEFINE_CLK(mcfi2c0, "imx1-i2c.0", MCF_BUSCLK); |
| 39 | |
| 40 | struct clk *mcf_clks[] = { |
| 41 | &clk_pll, |
| 42 | &clk_sys, |
| 43 | &clk_mcfpit0, |
| 44 | &clk_mcfpit1, |
| 45 | &clk_mcfpit2, |
| 46 | &clk_mcfpit3, |
| 47 | &clk_mcfuart0, |
| 48 | &clk_mcfuart1, |
| 49 | &clk_mcfuart2, |
| 50 | &clk_mcfqspi0, |
| 51 | &clk_fec0, |
| 52 | &clk_mcfi2c0, |
| 53 | NULL |
| 54 | }; |
| 55 | |
| 56 | /***************************************************************************/ |
| 57 | |
| 58 | static void __init m523x_qspi_init(void) |
| 59 | { |
| 60 | #if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) |
| 61 | u16 par; |
| 62 | |
| 63 | /* setup QSPS pins for QSPI with gpio CS control */ |
| 64 | writeb(0x1f, MCFGPIO_PAR_QSPI); |
| 65 | /* and CS2 & CS3 as gpio */ |
| 66 | par = readw(MCFGPIO_PAR_TIMER); |
| 67 | par &= 0x3f3f; |
| 68 | writew(par, MCFGPIO_PAR_TIMER); |
| 69 | #endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */ |
| 70 | } |
| 71 | |
| 72 | /***************************************************************************/ |
| 73 | |
| 74 | static void __init m523x_i2c_init(void) |
| 75 | { |
| 76 | #if IS_ENABLED(CONFIG_I2C_IMX) |
| 77 | u8 par; |
| 78 | |
| 79 | /* setup Port AS Pin Assignment Register for I2C */ |
| 80 | /* set PASPA0 to SCL and PASPA1 to SDA */ |
| 81 | par = readb(MCFGPIO_PAR_FECI2C); |
| 82 | par |= 0x0f; |
| 83 | writeb(par, MCFGPIO_PAR_FECI2C); |
| 84 | #endif /* IS_ENABLED(CONFIG_I2C_IMX) */ |
| 85 | } |
| 86 | |
| 87 | /***************************************************************************/ |
| 88 | |
| 89 | static void __init m523x_fec_init(void) |
| 90 | { |
| 91 | /* Set multi-function pins to ethernet use */ |
| 92 | writeb(readb(MCFGPIO_PAR_FECI2C) | 0xf0, MCFGPIO_PAR_FECI2C); |
| 93 | } |
| 94 | |
| 95 | /***************************************************************************/ |
| 96 | |
| 97 | void __init config_BSP(char *commandp, int size) |
| 98 | { |
| 99 | mach_sched_init = hw_timer_init; |
| 100 | m523x_fec_init(); |
| 101 | m523x_qspi_init(); |
| 102 | m523x_i2c_init(); |
| 103 | } |
| 104 | |
| 105 | /***************************************************************************/ |