Merge branch '2021-07-14-platform-updates'

- Assorted platform updates

1 files changed, 125 insertions, 0 deletions

diff --git a/drivers/gpio/nmk_gpio.c b/drivers/gpio/nmk_gpio.c
new file mode 100644
index 0000000000..e1bb41b196
--- /dev/null
+++ b/drivers/gpio/nmk_gpio.c
@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Copyright (C) 2019 Stephan Gerhold */
+
+#include <common.h>
+#include <dm.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+
+struct nmk_gpio_regs {
+	u32 dat;	/* data */
+	u32 dats;	/* data set */
+	u32 datc;	/* data clear */
+	u32 pdis;	/* pull disable */
+	u32 dir;	/* direction */
+	u32 dirs;	/* direction set */
+	u32 dirc;	/* direction clear */
+	u32 slpm;	/* sleep mode */
+	u32 afsla;	/* alternate function select A */
+	u32 afslb;	/* alternate function select B */
+	u32 lowemi;	/* low EMI mode */
+};
+
+struct nmk_gpio {
+	struct nmk_gpio_regs *regs;
+};
+
+static int nmk_gpio_get_value(struct udevice *dev, unsigned offset)
+{
+	struct nmk_gpio *priv = dev_get_priv(dev);
+
+	return !!(readl(&priv->regs->dat) & BIT(offset));
+}
+
+static int nmk_gpio_set_value(struct udevice *dev, unsigned offset, int value)
+{
+	struct nmk_gpio *priv = dev_get_priv(dev);
+
+	if (value)
+		writel(BIT(offset), &priv->regs->dats);
+	else
+		writel(BIT(offset), &priv->regs->datc);
+
+	return 0;
+}
+
+static int nmk_gpio_get_function(struct udevice *dev, unsigned offset)
+{
+	struct nmk_gpio *priv = dev_get_priv(dev);
+
+	if (readl(&priv->regs->afsla) & BIT(offset) ||
+	    readl(&priv->regs->afslb) & BIT(offset))
+		return GPIOF_FUNC;
+
+	if (readl(&priv->regs->dir) & BIT(offset))
+		return GPIOF_OUTPUT;
+	else
+		return GPIOF_INPUT;
+}
+
+static int nmk_gpio_direction_input(struct udevice *dev, unsigned offset)
+{
+	struct nmk_gpio *priv = dev_get_priv(dev);
+
+	writel(BIT(offset), &priv->regs->dirc);
+	return 0;
+}
+
+static int nmk_gpio_direction_output(struct udevice *dev, unsigned offset,
+				     int value)
+{
+	struct nmk_gpio *priv = dev_get_priv(dev);
+
+	writel(BIT(offset), &priv->regs->dirs);
+	return nmk_gpio_set_value(dev, offset, value);
+}
+
+static const struct dm_gpio_ops nmk_gpio_ops = {
+	.get_value		= nmk_gpio_get_value,
+	.set_value		= nmk_gpio_set_value,
+	.get_function		= nmk_gpio_get_function,
+	.direction_input	= nmk_gpio_direction_input,
+	.direction_output	= nmk_gpio_direction_output,
+};
+
+static int nmk_gpio_probe(struct udevice *dev)
+{
+	struct nmk_gpio *priv = dev_get_priv(dev);
+	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+	char buf[20];
+	u32 bank;
+	int ret;
+
+	priv->regs = dev_read_addr_ptr(dev);
+	if (!priv->regs)
+		return -EINVAL;
+
+	ret = dev_read_u32(dev, "gpio-bank", &bank);
+	if (ret < 0) {
+		printf("nmk_gpio(%s): Failed to read gpio-bank\n", dev->name);
+		return ret;
+	}
+
+	sprintf(buf, "nmk%u-gpio", bank);
+	uc_priv->bank_name = strdup(buf);
+	if (!uc_priv->bank_name)
+		return -ENOMEM;
+
+	uc_priv->gpio_count = sizeof(priv->regs->dat) * BITS_PER_BYTE;
+
+	return 0;
+}
+
+static const struct udevice_id nmk_gpio_ids[] = {
+	{ .compatible = "st,nomadik-gpio" },
+	{ }
+};
+
+U_BOOT_DRIVER(gpio_nmk) = {
+	.name		= "nmk_gpio",
+	.id		= UCLASS_GPIO,
+	.of_match	= nmk_gpio_ids,
+	.probe		= nmk_gpio_probe,
+	.ops		= &nmk_gpio_ops,
+	.priv_auto	= sizeof(struct nmk_gpio),
+};