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path: root/drivers/gpio/gpio-tz1090-pdc.c
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Diffstat (limited to 'drivers/gpio/gpio-tz1090-pdc.c')
-rw-r--r--drivers/gpio/gpio-tz1090-pdc.c231
1 files changed, 0 insertions, 231 deletions
diff --git a/drivers/gpio/gpio-tz1090-pdc.c b/drivers/gpio/gpio-tz1090-pdc.c
deleted file mode 100644
index 5b7781741ee9..000000000000
--- a/drivers/gpio/gpio-tz1090-pdc.c
+++ /dev/null
@@ -1,231 +0,0 @@
-/*
- * Toumaz Xenif TZ1090 PDC GPIO handling.
- *
- * Copyright (C) 2012-2013 Imagination Technologies Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/bitops.h>
-#include <linux/gpio.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/of_irq.h>
-#include <linux/pinctrl/consumer.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/syscore_ops.h>
-#include <asm/global_lock.h>
-
-/* Register offsets from SOC_GPIO_CONTROL0 */
-#define REG_SOC_GPIO_CONTROL0 0x00
-#define REG_SOC_GPIO_CONTROL1 0x04
-#define REG_SOC_GPIO_CONTROL2 0x08
-#define REG_SOC_GPIO_CONTROL3 0x0c
-#define REG_SOC_GPIO_STATUS 0x80
-
-/* PDC GPIOs go after normal GPIOs */
-#define GPIO_PDC_BASE 90
-#define GPIO_PDC_NGPIO 7
-
-/* Out of PDC gpios, only syswakes have irqs */
-#define GPIO_PDC_IRQ_FIRST 2
-#define GPIO_PDC_NIRQ 3
-
-/**
- * struct tz1090_pdc_gpio - GPIO bank private data
- * @chip: Generic GPIO chip for GPIO bank
- * @reg: Base of registers, offset for this GPIO bank
- * @irq: IRQ numbers for Syswake GPIOs
- *
- * This is the main private data for the PDC GPIO driver. It encapsulates a
- * gpio_chip, and the callbacks for the gpio_chip can access the private data
- * with the to_pdc() macro below.
- */
-struct tz1090_pdc_gpio {
- struct gpio_chip chip;
- void __iomem *reg;
- int irq[GPIO_PDC_NIRQ];
-};
-
-/* Register accesses into the PDC MMIO area */
-
-static inline void pdc_write(struct tz1090_pdc_gpio *priv, unsigned int reg_offs,
- unsigned int data)
-{
- writel(data, priv->reg + reg_offs);
-}
-
-static inline unsigned int pdc_read(struct tz1090_pdc_gpio *priv,
- unsigned int reg_offs)
-{
- return readl(priv->reg + reg_offs);
-}
-
-/* Generic GPIO interface */
-
-static int tz1090_pdc_gpio_direction_input(struct gpio_chip *chip,
- unsigned int offset)
-{
- struct tz1090_pdc_gpio *priv = gpiochip_get_data(chip);
- u32 value;
- int lstat;
-
- __global_lock2(lstat);
- value = pdc_read(priv, REG_SOC_GPIO_CONTROL1);
- value |= BIT(offset);
- pdc_write(priv, REG_SOC_GPIO_CONTROL1, value);
- __global_unlock2(lstat);
-
- return 0;
-}
-
-static int tz1090_pdc_gpio_direction_output(struct gpio_chip *chip,
- unsigned int offset,
- int output_value)
-{
- struct tz1090_pdc_gpio *priv = gpiochip_get_data(chip);
- u32 value;
- int lstat;
-
- __global_lock2(lstat);
- /* EXT_POWER doesn't seem to have an output value bit */
- if (offset < 6) {
- value = pdc_read(priv, REG_SOC_GPIO_CONTROL0);
- if (output_value)
- value |= BIT(offset);
- else
- value &= ~BIT(offset);
- pdc_write(priv, REG_SOC_GPIO_CONTROL0, value);
- }
-
- value = pdc_read(priv, REG_SOC_GPIO_CONTROL1);
- value &= ~BIT(offset);
- pdc_write(priv, REG_SOC_GPIO_CONTROL1, value);
- __global_unlock2(lstat);
-
- return 0;
-}
-
-static int tz1090_pdc_gpio_get(struct gpio_chip *chip, unsigned int offset)
-{
- struct tz1090_pdc_gpio *priv = gpiochip_get_data(chip);
- return !!(pdc_read(priv, REG_SOC_GPIO_STATUS) & BIT(offset));
-}
-
-static void tz1090_pdc_gpio_set(struct gpio_chip *chip, unsigned int offset,
- int output_value)
-{
- struct tz1090_pdc_gpio *priv = gpiochip_get_data(chip);
- u32 value;
- int lstat;
-
- /* EXT_POWER doesn't seem to have an output value bit */
- if (offset >= 6)
- return;
-
- __global_lock2(lstat);
- value = pdc_read(priv, REG_SOC_GPIO_CONTROL0);
- if (output_value)
- value |= BIT(offset);
- else
- value &= ~BIT(offset);
- pdc_write(priv, REG_SOC_GPIO_CONTROL0, value);
- __global_unlock2(lstat);
-}
-
-static int tz1090_pdc_gpio_to_irq(struct gpio_chip *chip, unsigned int offset)
-{
- struct tz1090_pdc_gpio *priv = gpiochip_get_data(chip);
- unsigned int syswake = offset - GPIO_PDC_IRQ_FIRST;
- int irq;
-
- /* only syswakes have irqs */
- if (syswake >= GPIO_PDC_NIRQ)
- return -EINVAL;
-
- irq = priv->irq[syswake];
- if (!irq)
- return -EINVAL;
-
- return irq;
-}
-
-static int tz1090_pdc_gpio_probe(struct platform_device *pdev)
-{
- struct device_node *np = pdev->dev.of_node;
- struct resource *res_regs;
- struct tz1090_pdc_gpio *priv;
- unsigned int i;
-
- if (!np) {
- dev_err(&pdev->dev, "must be instantiated via devicetree\n");
- return -ENOENT;
- }
-
- res_regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res_regs) {
- dev_err(&pdev->dev, "cannot find registers resource\n");
- return -ENOENT;
- }
-
- priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
- if (!priv) {
- dev_err(&pdev->dev, "unable to allocate driver data\n");
- return -ENOMEM;
- }
-
- /* Ioremap the registers */
- priv->reg = devm_ioremap(&pdev->dev, res_regs->start,
- resource_size(res_regs));
- if (!priv->reg) {
- dev_err(&pdev->dev, "unable to ioremap registers\n");
- return -ENOMEM;
- }
-
- /* Set up GPIO chip */
- priv->chip.label = "tz1090-pdc-gpio";
- priv->chip.parent = &pdev->dev;
- priv->chip.direction_input = tz1090_pdc_gpio_direction_input;
- priv->chip.direction_output = tz1090_pdc_gpio_direction_output;
- priv->chip.get = tz1090_pdc_gpio_get;
- priv->chip.set = tz1090_pdc_gpio_set;
- priv->chip.free = gpiochip_generic_free;
- priv->chip.request = gpiochip_generic_request;
- priv->chip.to_irq = tz1090_pdc_gpio_to_irq;
- priv->chip.of_node = np;
-
- /* GPIO numbering */
- priv->chip.base = GPIO_PDC_BASE;
- priv->chip.ngpio = GPIO_PDC_NGPIO;
-
- /* Map the syswake irqs */
- for (i = 0; i < GPIO_PDC_NIRQ; ++i)
- priv->irq[i] = irq_of_parse_and_map(np, i);
-
- /* Add the GPIO bank */
- gpiochip_add_data(&priv->chip, priv);
-
- return 0;
-}
-
-static struct of_device_id tz1090_pdc_gpio_of_match[] = {
- { .compatible = "img,tz1090-pdc-gpio" },
- { },
-};
-
-static struct platform_driver tz1090_pdc_gpio_driver = {
- .driver = {
- .name = "tz1090-pdc-gpio",
- .of_match_table = tz1090_pdc_gpio_of_match,
- },
- .probe = tz1090_pdc_gpio_probe,
-};
-
-static int __init tz1090_pdc_gpio_init(void)
-{
- return platform_driver_register(&tz1090_pdc_gpio_driver);
-}
-subsys_initcall(tz1090_pdc_gpio_init);
generated by cgit (git 2.34.1) at 2024-05-23 05:33:36 +0000