Source of spi-ppc4xx.c - linux-imx - PHYTEC BitBucket (Stash)

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​
    /*
     * A count of zero implies a single SPI device without any chip-select.
     * Note that of_gpio_count counts all gpios assigned to this spi master.
     * This includes both "null" gpio's and real ones.
     */
    num_gpios = of_gpio_count(np);
    if (num_gpios > 0) {
        int i;
​
        hw->gpios = kzalloc(sizeof(int) * num_gpios, GFP_KERNEL);
        hw->gpios = kcalloc(num_gpios, sizeof(*hw->gpios), GFP_KERNEL);
        if (!hw->gpios) {
            ret = -ENOMEM;
            goto free_master;
        }
​
        for (i = 0; i < num_gpios; i++) {
            int gpio;
            enum of_gpio_flags flags;
​
            gpio = of_get_gpio_flags(np, i, &flags);