1 /*
2 * arch/arm/mach-kirkwood/lacie_v2-common.c
3 *
4 * This file is licensed under the terms of the GNU General Public
5 * License version 2. This program is licensed "as is" without any
6 * warranty of any kind, whether express or implied.
7 */
8
9 #include <linux/kernel.h>
10 #include <linux/init.h>
11 #include <linux/mtd/physmap.h>
12 #include <linux/spi/flash.h>
13 #include <linux/spi/spi.h>
14 #include <linux/i2c.h>
15 #include <linux/i2c/at24.h>
16 #include <linux/gpio.h>
17 #include <asm/mach/time.h>
18 #include <mach/kirkwood.h>
19 #include <mach/irqs.h>
20 #include <plat/time.h>
21 #include "common.h"
22
23 /*****************************************************************************
24 * 512KB SPI Flash on Boot Device (MACRONIX MX25L4005)
25 ****************************************************************************/
26
27 static struct mtd_partition lacie_v2_flash_parts[] = {
28 {
29 .name = "u-boot",
30 .size = MTDPART_SIZ_FULL,
31 .offset = 0,
32 .mask_flags = MTD_WRITEABLE, /* force read-only */
33 },
34 };
35
36 static const struct flash_platform_data lacie_v2_flash = {
37 .type = "mx25l4005a",
38 .name = "spi_flash",
39 .parts = lacie_v2_flash_parts,
40 .nr_parts = ARRAY_SIZE(lacie_v2_flash_parts),
41 };
42
43 static struct spi_board_info __initdata lacie_v2_spi_slave_info[] = {
44 {
45 .modalias = "m25p80",
46 .platform_data = &lacie_v2_flash,
47 .irq = -1,
48 .max_speed_hz = 20000000,
49 .bus_num = 0,
50 .chip_select = 0,
51 },
52 };
53
lacie_v2_register_flash(void)54 void __init lacie_v2_register_flash(void)
55 {
56 spi_register_board_info(lacie_v2_spi_slave_info,
57 ARRAY_SIZE(lacie_v2_spi_slave_info));
58 kirkwood_spi_init();
59 }
60
61 /*****************************************************************************
62 * I2C devices
63 ****************************************************************************/
64
65 static struct at24_platform_data at24c04 = {
66 .byte_len = SZ_4K / 8,
67 .page_size = 16,
68 };
69
70 /*
71 * i2c addr | chip | description
72 * 0x50 | HT24LC04 | eeprom (512B)
73 */
74
75 static struct i2c_board_info __initdata lacie_v2_i2c_info[] = {
76 {
77 I2C_BOARD_INFO("24c04", 0x50),
78 .platform_data = &at24c04,
79 }
80 };
81
lacie_v2_register_i2c_devices(void)82 void __init lacie_v2_register_i2c_devices(void)
83 {
84 kirkwood_i2c_init();
85 i2c_register_board_info(0, lacie_v2_i2c_info,
86 ARRAY_SIZE(lacie_v2_i2c_info));
87 }
88
89 /*****************************************************************************
90 * Hard Disk power
91 ****************************************************************************/
92
93 static int __initdata lacie_v2_gpio_hdd_power[] = { 16, 17, 41, 42, 43 };
94
lacie_v2_hdd_power_init(int hdd_num)95 void __init lacie_v2_hdd_power_init(int hdd_num)
96 {
97 int i;
98 int err;
99
100 /* Power up all hard disks. */
101 for (i = 0; i < hdd_num; i++) {
102 err = gpio_request(lacie_v2_gpio_hdd_power[i], NULL);
103 if (err == 0) {
104 err = gpio_direction_output(
105 lacie_v2_gpio_hdd_power[i], 1);
106 /* Free the HDD power GPIOs. This allow user-space to
107 * configure them via the gpiolib sysfs interface. */
108 gpio_free(lacie_v2_gpio_hdd_power[i]);
109 }
110 if (err)
111 pr_err("Failed to power up HDD%d\n", i + 1);
112 }
113 }
114