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alistair23-linux/arch/m68k/coldfire/m5441x.c
Steven King 2d24b532f9 m68knommu: platform support for i2c devices on ColdFire SoC 
These changes based on work by Steven King <sfking@fdwdc.com> to support
the i2c hardware modules on ColdFire SoC family devices.

This is the per SoC hardware support. Contains a common platform device
setup. Each of the SoC family members tends to have some minor local
setup required to initialize the module. But all ColdFire family members
use the same i2c hardware module.

This i2c hardware module is the same as used in the Freescale iMX ARM
based family of SoC devices. Steven's original patches were based on using
a new and different i2c-coldfire.c driver. But this is not neccessary as
we can use the existing Linux i2c-imx.c driver with no change required to
it. And this patch is now based on using the existing i2c-imx driver.

This patch only contains the ColdFire platform changes.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Tested-by: Angelo Dureghello <angelo@sysam.it>
2016-12-05 08:53:27 +10:00

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/*
* m5441x.c -- support for Coldfire m5441x processors
*
* (C) Copyright Steven King <sfking@fdwdc.com>
*/
#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfuart.h>
#include <asm/mcfdma.h>
#include <asm/mcfclk.h>
DEFINE_CLK(0, "flexbus", 2, MCF_CLK);
DEFINE_CLK(0, "mcfcan.0", 8, MCF_CLK);
DEFINE_CLK(0, "mcfcan.1", 9, MCF_CLK);
DEFINE_CLK(0, "imx1-i2c.1", 14, MCF_CLK);
DEFINE_CLK(0, "mcfdspi.1", 15, MCF_CLK);
DEFINE_CLK(0, "edma", 17, MCF_CLK);
DEFINE_CLK(0, "intc.0", 18, MCF_CLK);
DEFINE_CLK(0, "intc.1", 19, MCF_CLK);
DEFINE_CLK(0, "intc.2", 20, MCF_CLK);
DEFINE_CLK(0, "imx1-i2c.0", 22, MCF_CLK);
DEFINE_CLK(0, "mcfdspi.0", 23, MCF_CLK);
DEFINE_CLK(0, "mcfuart.0", 24, MCF_BUSCLK);
DEFINE_CLK(0, "mcfuart.1", 25, MCF_BUSCLK);
DEFINE_CLK(0, "mcfuart.2", 26, MCF_BUSCLK);
DEFINE_CLK(0, "mcfuart.3", 27, MCF_BUSCLK);
DEFINE_CLK(0, "mcftmr.0", 28, MCF_CLK);
DEFINE_CLK(0, "mcftmr.1", 29, MCF_CLK);
DEFINE_CLK(0, "mcftmr.2", 30, MCF_CLK);
DEFINE_CLK(0, "mcftmr.3", 31, MCF_CLK);
DEFINE_CLK(0, "mcfpit.0", 32, MCF_CLK);
DEFINE_CLK(0, "mcfpit.1", 33, MCF_CLK);
DEFINE_CLK(0, "mcfpit.2", 34, MCF_CLK);
DEFINE_CLK(0, "mcfpit.3", 35, MCF_CLK);
DEFINE_CLK(0, "mcfeport.0", 37, MCF_CLK);
DEFINE_CLK(0, "mcfadc.0", 38, MCF_CLK);
DEFINE_CLK(0, "mcfdac.0", 39, MCF_CLK);
DEFINE_CLK(0, "mcfrtc.0", 42, MCF_CLK);
DEFINE_CLK(0, "mcfsim.0", 43, MCF_CLK);
DEFINE_CLK(0, "mcfusb-otg.0", 44, MCF_CLK);
DEFINE_CLK(0, "mcfusb-host.0", 45, MCF_CLK);
DEFINE_CLK(0, "mcfddr-sram.0", 46, MCF_CLK);
DEFINE_CLK(0, "mcfssi.0", 47, MCF_CLK);
DEFINE_CLK(0, "pll.0", 48, MCF_CLK);
DEFINE_CLK(0, "mcfrng.0", 49, MCF_CLK);
DEFINE_CLK(0, "mcfssi.1", 50, MCF_CLK);
DEFINE_CLK(0, "mcfsdhc.0", 51, MCF_CLK);
DEFINE_CLK(0, "enet-fec.0", 53, MCF_CLK);
DEFINE_CLK(0, "enet-fec.1", 54, MCF_CLK);
DEFINE_CLK(0, "switch.0", 55, MCF_CLK);
DEFINE_CLK(0, "switch.1", 56, MCF_CLK);
DEFINE_CLK(0, "nand.0", 63, MCF_CLK);
DEFINE_CLK(1, "mcfow.0", 2, MCF_CLK);
DEFINE_CLK(1, "imx1-i2c.2", 4, MCF_CLK);
DEFINE_CLK(1, "imx1-i2c.3", 5, MCF_CLK);
DEFINE_CLK(1, "imx1-i2c.4", 6, MCF_CLK);
DEFINE_CLK(1, "imx1-i2c.5", 7, MCF_CLK);
DEFINE_CLK(1, "mcfuart.4", 24, MCF_BUSCLK);
DEFINE_CLK(1, "mcfuart.5", 25, MCF_BUSCLK);
DEFINE_CLK(1, "mcfuart.6", 26, MCF_BUSCLK);
DEFINE_CLK(1, "mcfuart.7", 27, MCF_BUSCLK);
DEFINE_CLK(1, "mcfuart.8", 28, MCF_BUSCLK);
DEFINE_CLK(1, "mcfuart.9", 29, MCF_BUSCLK);
DEFINE_CLK(1, "mcfpwm.0", 34, MCF_BUSCLK);
DEFINE_CLK(1, "sys.0", 36, MCF_BUSCLK);
DEFINE_CLK(1, "gpio.0", 37, MCF_BUSCLK);
struct clk *mcf_clks[] = {
&__clk_0_2,
&__clk_0_8,
&__clk_0_9,
&__clk_0_14,
&__clk_0_15,
&__clk_0_17,
&__clk_0_18,
&__clk_0_19,
&__clk_0_20,
&__clk_0_22,
&__clk_0_23,
&__clk_0_24,
&__clk_0_25,
&__clk_0_26,
&__clk_0_27,
&__clk_0_28,
&__clk_0_29,
&__clk_0_30,
&__clk_0_31,
&__clk_0_32,
&__clk_0_33,
&__clk_0_34,
&__clk_0_35,
&__clk_0_37,
&__clk_0_38,
&__clk_0_39,
&__clk_0_42,
&__clk_0_43,
&__clk_0_44,
&__clk_0_45,
&__clk_0_46,
&__clk_0_47,
&__clk_0_48,
&__clk_0_49,
&__clk_0_50,
&__clk_0_51,
&__clk_0_53,
&__clk_0_54,
&__clk_0_55,
&__clk_0_56,
&__clk_0_63,
&__clk_1_2,
&__clk_1_4,
&__clk_1_5,
&__clk_1_6,
&__clk_1_7,
&__clk_1_24,
&__clk_1_25,
&__clk_1_26,
&__clk_1_27,
&__clk_1_28,
&__clk_1_29,
&__clk_1_34,
&__clk_1_36,
&__clk_1_37,
NULL,
};
static struct clk * const enable_clks[] __initconst = {
/* make sure these clocks are enabled */
&__clk_0_18, /* intc0 */
&__clk_0_19, /* intc0 */
&__clk_0_20, /* intc0 */
&__clk_0_24, /* uart0 */
&__clk_0_25, /* uart1 */
&__clk_0_26, /* uart2 */
&__clk_0_27, /* uart3 */
&__clk_0_33, /* pit.1 */
&__clk_0_37, /* eport */
&__clk_0_48, /* pll */
&__clk_1_36, /* CCM/reset module/Power management */
&__clk_1_37, /* gpio */
};
static struct clk * const disable_clks[] __initconst = {
&__clk_0_8, /* can.0 */
&__clk_0_9, /* can.1 */
&__clk_0_14, /* i2c.1 */
&__clk_0_15, /* dspi.1 */
&__clk_0_17, /* eDMA */
&__clk_0_22, /* i2c.0 */
&__clk_0_23, /* dspi.0 */
&__clk_0_28, /* tmr.1 */
&__clk_0_29, /* tmr.2 */
&__clk_0_30, /* tmr.2 */
&__clk_0_31, /* tmr.3 */
&__clk_0_32, /* pit.0 */
&__clk_0_34, /* pit.2 */
&__clk_0_35, /* pit.3 */
&__clk_0_38, /* adc */
&__clk_0_39, /* dac */
&__clk_0_44, /* usb otg */
&__clk_0_45, /* usb host */
&__clk_0_47, /* ssi.0 */
&__clk_0_49, /* rng */
&__clk_0_50, /* ssi.1 */
&__clk_0_51, /* eSDHC */
&__clk_0_53, /* enet-fec */
&__clk_0_54, /* enet-fec */
&__clk_0_55, /* switch.0 */
&__clk_0_56, /* switch.1 */
&__clk_1_2, /* 1-wire */
&__clk_1_4, /* i2c.2 */
&__clk_1_5, /* i2c.3 */
&__clk_1_6, /* i2c.4 */
&__clk_1_7, /* i2c.5 */
&__clk_1_24, /* uart 4 */
&__clk_1_25, /* uart 5 */
&__clk_1_26, /* uart 6 */
&__clk_1_27, /* uart 7 */
&__clk_1_28, /* uart 8 */
&__clk_1_29, /* uart 9 */
};
static void __init m5441x_clk_init(void)
{
unsigned i;
for (i = 0; i < ARRAY_SIZE(enable_clks); ++i)
__clk_init_enabled(enable_clks[i]);
/* make sure these clocks are disabled */
for (i = 0; i < ARRAY_SIZE(disable_clks); ++i)
__clk_init_disabled(disable_clks[i]);
}
static void __init m5441x_uarts_init(void)
{
__raw_writeb(0x0f, MCFGPIO_PAR_UART0);
__raw_writeb(0x00, MCFGPIO_PAR_UART1);
__raw_writeb(0x00, MCFGPIO_PAR_UART2);
}
static void __init m5441x_fec_init(void)
{
__raw_writeb(0x03, MCFGPIO_PAR_FEC);
}
void __init config_BSP(char *commandp, int size)
{
m5441x_clk_init();
mach_sched_init = hw_timer_init;
m5441x_uarts_init();
m5441x_fec_init();
}
#if IS_ENABLED(CONFIG_RTC_DRV_M5441x)
static struct resource m5441x_rtc_resources[] = {
{
.start = MCFRTC_BASE,
.end = MCFRTC_BASE + MCFRTC_SIZE - 1,
.flags = IORESOURCE_MEM,
},
{
.start = MCF_IRQ_RTC,
.end = MCF_IRQ_RTC,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device m5441x_rtc = {
.name = "mcfrtc",
.id = 0,
.resource = m5441x_rtc_resources,
.num_resources = ARRAY_SIZE(m5441x_rtc_resources),
};
#endif
static struct platform_device *m5441x_devices[] __initdata = {
#if IS_ENABLED(CONFIG_RTC_DRV_M5441x)
&m5441x_rtc,
#endif
};
static int __init init_BSP(void)
{
platform_add_devices(m5441x_devices, ARRAY_SIZE(m5441x_devices));
return 0;
}
arch_initcall(init_BSP);
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