^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Access to GPOs on TWL6040 chip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2012 Texas Instruments, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Authors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Sergio Aguirre <saaguirre@ti.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Peter Ujfalusi <peter.ujfalusi@ti.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/kthread.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/gpio/driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/mfd/twl6040.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static int twl6040gpo_get(struct gpio_chip *chip, unsigned offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct twl6040 *twl6040 = dev_get_drvdata(chip->parent->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) ret = twl6040_reg_read(twl6040, TWL6040_REG_GPOCTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) return !!(ret & BIT(offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static int twl6040gpo_get_direction(struct gpio_chip *chip, unsigned offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) return GPIO_LINE_DIRECTION_OUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static int twl6040gpo_direction_out(struct gpio_chip *chip, unsigned offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /* This only drives GPOs, and can't change direction */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static void twl6040gpo_set(struct gpio_chip *chip, unsigned offset, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct twl6040 *twl6040 = dev_get_drvdata(chip->parent->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) u8 gpoctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) ret = twl6040_reg_read(twl6040, TWL6040_REG_GPOCTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) gpoctl = ret | BIT(offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) gpoctl = ret & ~BIT(offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) twl6040_reg_write(twl6040, TWL6040_REG_GPOCTL, gpoctl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static struct gpio_chip twl6040gpo_chip = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) .label = "twl6040",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) .get = twl6040gpo_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) .direction_output = twl6040gpo_direction_out,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) .get_direction = twl6040gpo_get_direction,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) .set = twl6040gpo_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) .can_sleep = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /*----------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) static int gpo_twl6040_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct device *twl6040_core_dev = pdev->dev.parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct twl6040 *twl6040 = dev_get_drvdata(twl6040_core_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) twl6040gpo_chip.base = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (twl6040_get_revid(twl6040) < TWL6041_REV_ES2_0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) twl6040gpo_chip.ngpio = 3; /* twl6040 have 3 GPO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) twl6040gpo_chip.ngpio = 1; /* twl6041 have 1 GPO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) twl6040gpo_chip.parent = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #ifdef CONFIG_OF_GPIO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) twl6040gpo_chip.of_node = twl6040_core_dev->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) ret = devm_gpiochip_add_data(&pdev->dev, &twl6040gpo_chip, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) dev_err(&pdev->dev, "could not register gpiochip, %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) twl6040gpo_chip.ngpio = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /* Note: this hardware lives inside an I2C-based multi-function device. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) MODULE_ALIAS("platform:twl6040-gpo");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static struct platform_driver gpo_twl6040_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .name = "twl6040-gpo",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) .probe = gpo_twl6040_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) module_platform_driver(gpo_twl6040_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) MODULE_AUTHOR("Texas Instruments, Inc.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) MODULE_DESCRIPTION("GPO interface for TWL6040");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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