arch/m68k/coldfire/m525x.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /***************************************************************************/
   3
   4 /*
   5  *      525x.c  -- platform support for ColdFire 525x based boards
   6  *
   7  *      Copyright (C) 2012, Steven King <sfking@fdwdc.com>
   8  */
   9
  10 /***************************************************************************/
  11
  12 #include <linux/kernel.h>
  13 #include <linux/param.h>
  14 #include <linux/init.h>
  15 #include <linux/io.h>
  16 #include <linux/platform_device.h>
  17 #include <asm/machdep.h>
  18 #include <asm/coldfire.h>
  19 #include <asm/mcfsim.h>
  20 #include <asm/mcfclk.h>
  21
  22 /***************************************************************************/
  23
  24 DEFINE_CLK(pll, "pll.0", MCF_CLK);
  25 DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
  26 DEFINE_CLK(mcftmr0, "mcftmr.0", MCF_BUSCLK);
  27 DEFINE_CLK(mcftmr1, "mcftmr.1", MCF_BUSCLK);
  28 DEFINE_CLK(mcfuart0, "mcfuart.0", MCF_BUSCLK);
  29 DEFINE_CLK(mcfuart1, "mcfuart.1", MCF_BUSCLK);
  30 DEFINE_CLK(mcfqspi0, "mcfqspi.0", MCF_BUSCLK);
  31 DEFINE_CLK(mcfi2c0, "imx1-i2c.0", MCF_BUSCLK);
  32 DEFINE_CLK(mcfi2c1, "imx1-i2c.1", MCF_BUSCLK);
  33
  34 struct clk *mcf_clks[] = {
  35         &clk_pll,
  36         &clk_sys,
  37         &clk_mcftmr0,
  38         &clk_mcftmr1,
  39         &clk_mcfuart0,
  40         &clk_mcfuart1,
  41         &clk_mcfqspi0,
  42         &clk_mcfi2c0,
  43         &clk_mcfi2c1,
  44         NULL
  45 };
  46
  47 /***************************************************************************/
  48
  49 static void __init m525x_qspi_init(void)
  50 {
  51 #if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
  52         /* set the GPIO function for the qspi cs gpios */
  53         /* FIXME: replace with pinmux/pinctl support */
  54         u32 f = readl(MCFSIM2_GPIOFUNC);
  55         f |= (1 << MCFQSPI_CS2) | (1 << MCFQSPI_CS1) | (1 << MCFQSPI_CS0);
  56         writel(f, MCFSIM2_GPIOFUNC);
  57
  58         /* QSPI irq setup */
  59         writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL4 | MCFSIM_ICR_PRI0,
  60                MCFSIM_QSPIICR);
  61         mcf_mapirq2imr(MCF_IRQ_QSPI, MCFINTC_QSPI);
  62 #endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
  63 }
  64
  65 static void __init m525x_i2c_init(void)
  66 {
  67 #if IS_ENABLED(CONFIG_I2C_IMX)
  68         u32 r;
  69
  70         /* first I2C controller uses regular irq setup */
  71         writeb(MCFSIM_ICR_AUTOVEC | MCFSIM_ICR_LEVEL5 | MCFSIM_ICR_PRI0,
  72                MCFSIM_I2CICR);
  73         mcf_mapirq2imr(MCF_IRQ_I2C0, MCFINTC_I2C);
  74
  75         /* second I2C controller is completely different */
  76         r = readl(MCFINTC2_INTPRI_REG(MCF_IRQ_I2C1));
  77         r &= ~MCFINTC2_INTPRI_BITS(0xf, MCF_IRQ_I2C1);
  78         r |= MCFINTC2_INTPRI_BITS(0x5, MCF_IRQ_I2C1);
  79         writel(r, MCFINTC2_INTPRI_REG(MCF_IRQ_I2C1));
  80 #endif /* IS_ENABLED(CONFIG_I2C_IMX) */
  81 }
  82
  83 /***************************************************************************/
  84
  85 void __init config_BSP(char *commandp, int size)
  86 {
  87         mach_sched_init = hw_timer_init;
  88
  89         m525x_qspi_init();
  90         m525x_i2c_init();
  91 }
  92
  93 /***************************************************************************/