Import GPIO-driver for MPC512x/8349/8572/8610/QorIQ and compatible from Linux
v5.2.
Signed-off-by: Steffen Trumtrar <s.trumt...@pengutronix.de>
---
drivers/gpio/Kconfig | 8 +++
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-mpc8xxx.c | 122 ++++++++++++++++++++++++++++++++++++
3 files changed, 131 insertions(+)
create mode 100644 drivers/gpio/gpio-mpc8xxx.c
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 7a1503198b49..0f924d135f0e 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -67,6 +67,14 @@ config GPIO_MALTA_FPGA_I2C
additional drivers must be enabled in order to use the
functionality of the device.
+config GPIO_MPC8XXX
+ bool "MPC512x/MPC8xxx/QorIQ GPIO support"
+ depends on ARCH_LAYERSCAPE
+ select GPIO_GENERIC
+ help
+ Say Y here if you're going to use hardware that connects to the
+ MPC512x/831x/834x/837x/8572/8610/QorIQ GPIOs.
+
config GPIO_OMAP
def_bool ARCH_OMAP
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 990df01788bc..bc5c500e4d27 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_GPIO_LIBFTDI1) += gpio-libftdi1.o
obj-$(CONFIG_GPIO_MXS) += gpio-mxs.o
obj-$(CONFIG_GPIO_JZ4740) += gpio-jz4740.o
obj-$(CONFIG_GPIO_MALTA_FPGA_I2C) += gpio-malta-fpga-i2c.o
+obj-$(CONFIG_GPIO_MPC8XXX) += gpio-mpc8xxx.o
obj-$(CONFIG_GPIO_ORION) += gpio-orion.o
obj-$(CONFIG_GPIO_OMAP) += gpio-omap.o
obj-$(CONFIG_GPIO_PCA953X) += gpio-pca953x.o
diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
new file mode 100644
index 000000000000..979f92ad3023
--- /dev/null
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -0,0 +1,122 @@
+/*
+ * GPIOs on MPC512x/8349/8572/8610/QorIQ and compatible
+ *
+ * Copyright (C) 2008 Peter Korsgaard <jac...@sunsite.dk>
+ * Copyright (C) 2016 Freescale Semiconductor Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <common.h>
+#include <init.h>
+#include <gpio.h>
+#include <linux/basic_mmio_gpio.h>
+#include <linux/clk.h>
+#include <malloc.h>
+#include <of.h>
+#include <of_address.h>
+#include <of_device.h>
+
+#define MPC8XXX_GPIO_PINS 32
+
+#define GPIO_DIR 0x00
+#define GPIO_ODR 0x04
+#define GPIO_DAT 0x08
+#define GPIO_IER 0x0c
+#define GPIO_IMR 0x10
+
+struct mpc8xxx_gpio_chip {
+ struct bgpio_chip bgc;
+ void __iomem *regs;
+};
+
+struct mpc8xxx_gpio_devtype {
+ int (*gpio_dir_out)(struct bgpio_chip *, unsigned int, int);
+ int (*gpio_get)(struct bgpio_chip *, unsigned int);
+};
+
+static int mpc8xxx_probe(struct device_d *dev)
+{
+ struct device_node *np;
+ struct resource *iores;
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc;
+ struct bgpio_chip *bgc;
+ int ret;
+
+ mpc8xxx_gc = xzalloc(sizeof(*mpc8xxx_gc));
+
+ if (dev->device_node) {
+ np = dev->device_node;
+ } else {
+ dev_err(dev, "no device_node\n");
+ return -ENODEV;
+ }
+
+ iores = dev_request_mem_resource(dev, 0);
+ if (IS_ERR(iores))
+ return PTR_ERR(iores);
+
+ mpc8xxx_gc->regs = IOMEM(iores->start);
+ if (!mpc8xxx_gc->regs)
+ return -ENOMEM;
+
+ bgc = &mpc8xxx_gc->bgc;
+
+ if (of_property_read_bool(np, "little-endian")) {
+ ret = bgpio_init(bgc, dev, 4,
+ mpc8xxx_gc->regs + GPIO_DAT,
+ NULL, NULL,
+ mpc8xxx_gc->regs + GPIO_DIR, NULL, 0);
+ if (ret)
+ goto err;
+ dev_dbg(dev, "GPIO registers are LITTLE endian\n");
+ } else {
+ ret = bgpio_init(bgc, dev, 4,
+ mpc8xxx_gc->regs + GPIO_DAT,
+ NULL, NULL,
+ mpc8xxx_gc->regs + GPIO_DIR, NULL,
+ BGPIOF_BIG_ENDIAN);
+ if (ret)
+ goto err;
+ dev_dbg(dev, "GPIO registers are BIG endian\n");
+ }
+
+ ret = gpiochip_add(&mpc8xxx_gc->bgc.gc);
+ if (ret) {
+ pr_err("%pOF: GPIO chip registration failed with status %d\n",
+ np, ret);
+ goto err;
+ }
+
+ /* ack and mask all irqs */
+ bgc->write_reg(mpc8xxx_gc->regs + GPIO_IER, 0xffffffff);
+ bgc->write_reg(mpc8xxx_gc->regs + GPIO_IMR, 0);
+
+ return 0;
+
+err:
+ return ret;
+}
+
+static __maybe_unused struct of_device_id mpc8xxx_gpio_ids[] = {
+ {
+ .compatible = "fsl,qoriq-gpio",
+ },
+ {
+ /* sentinel */
+ },
+};
+
+static struct driver_d mpc8xxx_driver = {
+ .name = "mpc8xxx-gpio",
+ .probe = mpc8xxx_probe,
+ .of_compatible = DRV_OF_COMPAT(mpc8xxx_gpio_ids),
+};
+
+static int __init mpc8xxx_init(void)
+{
+ return platform_driver_register(&mpc8xxx_driver);
+}
+postcore_initcall(mpc8xxx_init);
--
2.23.0
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