80 строки
1.9 KiB
C
80 строки
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/regulator/consumer.h>
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#include <asm/mach-types.h>
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#include <mach/pinmux.h>
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#include "board.h"
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#ifdef CONFIG_TEGRA_PCI
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/* GPIO 3 of the PMIC */
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#define EN_VDD_1V05_GPIO (TEGRA_NR_GPIOS + 2)
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static int __init harmony_pcie_init(void)
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{
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struct regulator *regulator = NULL;
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int err;
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if (!machine_is_harmony())
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return 0;
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err = gpio_request(EN_VDD_1V05_GPIO, "EN_VDD_1V05");
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if (err)
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return err;
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gpio_direction_output(EN_VDD_1V05_GPIO, 1);
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regulator = regulator_get(NULL, "pex_clk");
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if (IS_ERR_OR_NULL(regulator))
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goto err_reg;
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regulator_enable(regulator);
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tegra_pinmux_set_tristate(TEGRA_PINGROUP_GPV, TEGRA_TRI_NORMAL);
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tegra_pinmux_set_tristate(TEGRA_PINGROUP_SLXA, TEGRA_TRI_NORMAL);
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tegra_pinmux_set_tristate(TEGRA_PINGROUP_SLXK, TEGRA_TRI_NORMAL);
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err = tegra_pcie_init(true, true);
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if (err)
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goto err_pcie;
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return 0;
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err_pcie:
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tegra_pinmux_set_tristate(TEGRA_PINGROUP_GPV, TEGRA_TRI_TRISTATE);
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tegra_pinmux_set_tristate(TEGRA_PINGROUP_SLXA, TEGRA_TRI_TRISTATE);
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tegra_pinmux_set_tristate(TEGRA_PINGROUP_SLXK, TEGRA_TRI_TRISTATE);
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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_GPIO);
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return err;
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}
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/* PCI should be initialized after I2C, mfd and regulators */
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subsys_initcall_sync(harmony_pcie_init);
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#endif
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