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f863440d54
regulator_get() does not return NULL as an error value. Even when it does return an error, the code as written falls out the error path while returning zero (indicating no failure.) Fix this, and use the more correct IS_ERR() macro to check for errors. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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(regulator)) {
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err = PTR_ERR(regulator);
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pr_err("%s: regulator_get failed: %d\n", __func__, err);
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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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