1 /*
2 * arch/arm/mach-tegra/board-harmony-pcie.c
3 *
4 * Copyright (C) 2010 CompuLab, Ltd.
5 * Mike Rapoport <mike@compulab.co.il>
6 *
7 * This software is licensed under the terms of the GNU General Public
8 * License version 2, as published by the Free Software Foundation, and
9 * may be copied, distributed, and modified under those terms.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 */
17
18 #include <linux/kernel.h>
19 #include <linux/gpio.h>
20 #include <linux/err.h>
21 #include <linux/regulator/consumer.h>
22
23 #include <asm/mach-types.h>
24
25 #include "board.h"
26 #include "board-harmony.h"
27
28 #ifdef CONFIG_TEGRA_PCI
29
harmony_pcie_init(void)30 static int __init harmony_pcie_init(void)
31 {
32 struct regulator *regulator = NULL;
33 int err;
34
35 if (!machine_is_harmony())
36 return 0;
37
38 err = gpio_request(TEGRA_GPIO_EN_VDD_1V05_GPIO, "EN_VDD_1V05");
39 if (err)
40 return err;
41
42 gpio_direction_output(TEGRA_GPIO_EN_VDD_1V05_GPIO, 1);
43
44 regulator = regulator_get(NULL, "pex_clk");
45 if (IS_ERR_OR_NULL(regulator))
46 goto err_reg;
47
48 regulator_enable(regulator);
49
50 err = tegra_pcie_init(true, true);
51 if (err)
52 goto err_pcie;
53
54 return 0;
55
56 err_pcie:
57 regulator_disable(regulator);
58 regulator_put(regulator);
59 err_reg:
60 gpio_free(TEGRA_GPIO_EN_VDD_1V05_GPIO);
61
62 return err;
63 }
64
65 /* PCI should be initialized after I2C, mfd and regulators */
66 subsys_initcall_sync(harmony_pcie_init);
67
68 #endif
69