kernel-ark/arch/sh/boards/board-apsh4a3a.c
Paul Mundt 7912825d8b sh: Tidy up pre-clkdev clk_get() error handling.
clk_get() used to return NULL or an errno value depending on whether a
clkdev lookup failed or a clock wasn't found in the primary clock list.
As these disjoint paths were unified and everything now is handled via
clkdev lookups, the NULL case never makes it out of clk_get(). Update
accordingly and always look to the errno value.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-06-24 17:36:23 +09:00

176 lines
4.0 KiB
C

/*
* ALPHAPROJECT AP-SH4A-3A Support.
*
* Copyright (C) 2010 ALPHAPROJECT Co.,Ltd.
* Copyright (C) 2008 Yoshihiro Shimoda
* Copyright (C) 2009 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/mtd/physmap.h>
#include <linux/smsc911x.h>
#include <linux/irq.h>
#include <linux/clk.h>
#include <asm/machvec.h>
#include <asm/sizes.h>
#include <asm/clock.h>
static struct mtd_partition nor_flash_partitions[] = {
{
.name = "loader",
.offset = 0x00000000,
.size = 512 * 1024,
},
{
.name = "bootenv",
.offset = MTDPART_OFS_APPEND,
.size = 512 * 1024,
},
{
.name = "kernel",
.offset = MTDPART_OFS_APPEND,
.size = 4 * 1024 * 1024,
},
{
.name = "data",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
},
};
static struct physmap_flash_data nor_flash_data = {
.width = 4,
.parts = nor_flash_partitions,
.nr_parts = ARRAY_SIZE(nor_flash_partitions),
};
static struct resource nor_flash_resources[] = {
[0] = {
.start = 0x00000000,
.end = 0x01000000 - 1,
.flags = IORESOURCE_MEM,
}
};
static struct platform_device nor_flash_device = {
.name = "physmap-flash",
.dev = {
.platform_data = &nor_flash_data,
},
.num_resources = ARRAY_SIZE(nor_flash_resources),
.resource = nor_flash_resources,
};
static struct resource smsc911x_resources[] = {
[0] = {
.name = "smsc911x-memory",
.start = 0xA4000000,
.end = 0xA4000000 + SZ_256 - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.name = "smsc911x-irq",
.start = evt2irq(0x200),
.end = evt2irq(0x200),
.flags = IORESOURCE_IRQ,
},
};
static struct smsc911x_platform_config smsc911x_config = {
.irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
.irq_type = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
.flags = SMSC911X_USE_16BIT,
.phy_interface = PHY_INTERFACE_MODE_MII,
};
static struct platform_device smsc911x_device = {
.name = "smsc911x",
.id = -1,
.num_resources = ARRAY_SIZE(smsc911x_resources),
.resource = smsc911x_resources,
.dev = {
.platform_data = &smsc911x_config,
},
};
static struct platform_device *apsh4a3a_devices[] __initdata = {
&nor_flash_device,
&smsc911x_device,
};
static int __init apsh4a3a_devices_setup(void)
{
return platform_add_devices(apsh4a3a_devices,
ARRAY_SIZE(apsh4a3a_devices));
}
device_initcall(apsh4a3a_devices_setup);
static int apsh4a3a_clk_init(void)
{
struct clk *clk;
int ret;
clk = clk_get(NULL, "extal");
if (IS_ERR(clk))
return PTR_ERR(clk);
ret = clk_set_rate(clk, 33333000);
clk_put(clk);
return ret;
}
/* Initialize the board */
static void __init apsh4a3a_setup(char **cmdline_p)
{
printk(KERN_INFO "Alpha Project AP-SH4A-3A support:\n");
}
static void __init apsh4a3a_init_irq(void)
{
plat_irq_setup_pins(IRQ_MODE_IRQ7654);
}
/* Return the board specific boot mode pin configuration */
static int apsh4a3a_mode_pins(void)
{
int value = 0;
/* These are the factory default settings of SW1 and SW2.
* If you change these dip switches then you will need to
* adjust the values below as well.
*/
value &= ~MODE_PIN0; /* Clock Mode 16 */
value &= ~MODE_PIN1;
value &= ~MODE_PIN2;
value &= ~MODE_PIN3;
value |= MODE_PIN4;
value &= ~MODE_PIN5; /* 16-bit Area0 bus width */
value |= MODE_PIN6; /* Area 0 SRAM interface */
value |= MODE_PIN7;
value |= MODE_PIN8; /* Little Endian */
value |= MODE_PIN9; /* Master Mode */
value |= MODE_PIN10; /* Crystal resonator */
value |= MODE_PIN11; /* Display Unit */
value |= MODE_PIN12;
value &= ~MODE_PIN13; /* 29-bit address mode */
value |= MODE_PIN14; /* No PLL step-up */
return value;
}
/*
* The Machine Vector
*/
static struct sh_machine_vector mv_apsh4a3a __initmv = {
.mv_name = "AP-SH4A-3A",
.mv_setup = apsh4a3a_setup,
.mv_clk_init = apsh4a3a_clk_init,
.mv_init_irq = apsh4a3a_init_irq,
.mv_mode_pins = apsh4a3a_mode_pins,
};