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