pcm038: add driver for static ram (3620c0dc) · Commits · 戴 / test

arch/arm/mach-mx2/pcm038.c

+37 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@

		#include <linux/platform_device.h>
		#include <linux/mtd/physmap.h>
		#include <linux/mtd/plat-ram.h>
		#include <asm/mach/arch.h>
		#include <asm/mach-types.h>
		#include <mach/common.h>
		@@ -30,6 +31,31 @@

		#include "devices.h"

		/*
		* Phytec's PCM038 comes with 2MiB battery buffered SRAM,
		* 16 bit width
		*/

		static struct platdata_mtd_ram pcm038_sram_data = {
		.bankwidth = 2,
		};

		static struct resource pcm038_sram_resource = {
		.start = CS1_BASE_ADDR,
		.end = CS1_BASE_ADDR + 512 * 1024 - 1,
		.flags = IORESOURCE_MEM,
		};

		static struct platform_device pcm038_sram_mtd_device = {
		.name = "mtd-ram",
		.id = 0,
		.dev = {
		.platform_data = &pcm038_sram_data,
		},
		.num_resources = 1,
		.resource = &pcm038_sram_resource,
		};

		/*
		* Phytec's phyCORE-i.MX27 comes with 32MiB flash,
		* 16 bit width
		@@ -164,11 +190,22 @@ static void gpio_fec_inactive(void)
		static struct platform_device *platform_devices[] __initdata = {
		&pcm038_nor_mtd_device,
		&mxc_w1_master_device,
		&pcm038_sram_mtd_device,
		};

		/* On pcm038 there's a sram attached to CS1, we enable the chipselect here and
		* setup other stuffs to access the sram. */
		static void __init pcm038_init_sram(void)
		{
		__raw_writel(0x0000d843, CSCR_U(1));
		__raw_writel(0x22252521, CSCR_L(1));
		__raw_writel(0x22220a00, CSCR_A(1));
		}

		static void __init pcm038_init(void)
		{
		gpio_fec_active();
		pcm038_init_sram();

		mxc_register_device(&mxc_uart_device0, &uart_pdata[0]);
		mxc_register_device(&mxc_uart_device1, &uart_pdata[1]);