90 lines
2.0 KiB
C
90 lines
2.0 KiB
C
/*
|
|
* arch/arm/mach-tegra/board-harmony-pcie.c
|
|
*
|
|
* Copyright (C) 2010 CompuLab, Ltd.
|
|
* Mike Rapoport <mike@compulab.co.il>
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/err.h>
|
|
#include <linux/of_gpio.h>
|
|
#include <linux/regulator/consumer.h>
|
|
|
|
#include <asm/mach-types.h>
|
|
|
|
#include "board.h"
|
|
|
|
#ifdef CONFIG_TEGRA_PCI
|
|
|
|
int __init harmony_pcie_init(void)
|
|
{
|
|
struct device_node *np;
|
|
int en_vdd_1v05;
|
|
struct regulator *regulator = NULL;
|
|
int err;
|
|
|
|
np = of_find_node_by_path("/regulators/regulator@3");
|
|
if (!np) {
|
|
pr_err("%s: of_find_node_by_path failed\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
en_vdd_1v05 = of_get_named_gpio(np, "gpio", 0);
|
|
if (en_vdd_1v05 < 0) {
|
|
pr_err("%s: of_get_named_gpio failed: %d\n", __func__,
|
|
en_vdd_1v05);
|
|
return en_vdd_1v05;
|
|
}
|
|
|
|
err = gpio_request(en_vdd_1v05, "EN_VDD_1V05");
|
|
if (err) {
|
|
pr_err("%s: gpio_request failed: %d\n", __func__, err);
|
|
return err;
|
|
}
|
|
|
|
gpio_direction_output(en_vdd_1v05, 1);
|
|
|
|
regulator = regulator_get(NULL, "vdd_ldo0,vddio_pex_clk");
|
|
if (IS_ERR(regulator)) {
|
|
err = PTR_ERR(regulator);
|
|
pr_err("%s: regulator_get failed: %d\n", __func__, err);
|
|
goto err_reg;
|
|
}
|
|
|
|
err = regulator_enable(regulator);
|
|
if (err) {
|
|
pr_err("%s: regulator_enable failed: %d\n", __func__, err);
|
|
goto err_en;
|
|
}
|
|
|
|
err = tegra_pcie_init(true, true);
|
|
if (err) {
|
|
pr_err("%s: tegra_pcie_init failed: %d\n", __func__, err);
|
|
goto err_pcie;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_pcie:
|
|
regulator_disable(regulator);
|
|
err_en:
|
|
regulator_put(regulator);
|
|
err_reg:
|
|
gpio_free(en_vdd_1v05);
|
|
|
|
return err;
|
|
}
|
|
|
|
#endif
|