gpio: sch311x: Slightly refactor sch311x_detect for better readability
Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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@ -327,14 +327,22 @@ static int __init sch311x_detect(int sio_config_port, unsigned short *addr)
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if (err)
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return err;
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/* Check device ID. We currently know about:
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* SCH3112 (0x7c), SCH3114 (0x7d), and SCH3116 (0x7f). */
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/* Check device ID. */
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reg = sch311x_sio_inb(sio_config_port, 0x20);
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if (!(reg == 0x7c || reg == 0x7d || reg == 0x7f)) {
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switch (reg) {
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case 0x7c: /* SCH3112 */
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dev_id = 2;
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break;
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case 0x7d: /* SCH3114 */
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dev_id = 4;
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break;
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case 0x7f: /* SCH3116 */
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dev_id = 6;
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break;
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default:
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err = -ENODEV;
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goto exit;
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}
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dev_id = reg == 0x7c ? 2 : reg == 0x7d ? 4 : 6;
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/* Select logical device A (runtime registers) */
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sch311x_sio_outb(sio_config_port, 0x07, 0x0a);
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