summaryrefslogtreecommitdiffstats
path: root/drivers/pinctrl
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r--drivers/pinctrl/Kconfig6
-rw-r--r--drivers/pinctrl/Makefile1
-rw-r--r--drivers/pinctrl/imx-iomux-v3.c212
3 files changed, 219 insertions, 0 deletions
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 05adf59..6ce01bf 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -9,4 +9,10 @@ config PINCTRL
from the devicetree. Legacy drivers here may not need this core
support but instead provide their own SoC specific APIs
+config PINCTRL_IMX_IOMUX_V3
+ select PINCTRL if OFDEVICE
+ bool "i.MX iomux v3"
+ help
+ This iomux controller is found on i.MX25,35,51,53,6.
+
endmenu
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 59f096a..134c889 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_PINCTRL) += pinctrl.o
+obj-$(CONFIG_PINCTRL_IMX_IOMUX_V3) += imx-iomux-v3.o
diff --git a/drivers/pinctrl/imx-iomux-v3.c b/drivers/pinctrl/imx-iomux-v3.c
new file mode 100644
index 0000000..3ff3c15
--- /dev/null
+++ b/drivers/pinctrl/imx-iomux-v3.c
@@ -0,0 +1,212 @@
+/*
+ * imx-iomux-v3.c - i.MX iomux-v3 pinctrl support
+ *
+ * Copyright (c) 2013 Sascha Hauer <s.hauer@pengutronix.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <common.h>
+#include <init.h>
+#include <io.h>
+#include <pinctrl.h>
+#include <malloc.h>
+#include <mach/iomux-v3.h>
+
+struct imx_iomux_v3 {
+ void __iomem *base;
+ struct pinctrl_device pinctrl;
+};
+
+static void __iomem *iomuxv3_base;
+static struct device_d *iomuxv3_dev;
+
+static void imx_iomuxv3_setup_single(void __iomem *base, struct device_d *dev,
+ u32 mux_reg, u32 conf_reg, u32 input_reg,
+ u32 mux_val, u32 conf_val, u32 input_val)
+{
+ dev_dbg(dev,
+ "mux: 0x%08x -> 0x%04x, conf: 0x%08x -> 0x%04x input: 0x%08x -> 0x%04x\n",
+ mux_val, mux_reg, conf_val, conf_reg, input_val, input_reg);
+
+ if (mux_reg)
+ writel(mux_val, base + mux_reg);
+ if (conf_reg)
+ writel(conf_val, base + conf_reg);
+ if (input_reg)
+ writel(input_val, base + input_reg);
+}
+
+/*
+ * configures a single pad in the iomuxer
+ */
+int mxc_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
+{
+ u32 mux_reg = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
+ u32 mux_val = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
+ u32 input_reg = (pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
+ u32 input_val = (pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
+ u32 conf_reg = (pad & MUX_PAD_CTRL_OFS_MASK) >> MUX_PAD_CTRL_OFS_SHIFT;
+ u32 conf_val = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
+
+ if (!iomuxv3_base)
+ return -EINVAL;
+
+ if (conf_val & NO_PAD_CTRL)
+ conf_reg = 0;
+
+ imx_iomuxv3_setup_single(iomuxv3_base, iomuxv3_dev,
+ mux_reg, conf_reg, input_reg,
+ mux_val, conf_val, input_val);
+
+ return 0;
+}
+EXPORT_SYMBOL(mxc_iomux_v3_setup_pad);
+
+
+int mxc_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t *pad_list, unsigned count)
+{
+ iomux_v3_cfg_t *p = pad_list;
+ int i;
+ int ret;
+
+ for (i = 0; i < count; i++) {
+ ret = mxc_iomux_v3_setup_pad(*p);
+ if (ret)
+ return ret;
+ p++;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(mxc_iomux_v3_setup_multiple_pads);
+
+/*
+ * Each pin represented in fsl,pins consists of 5 u32 PIN_FUNC_ID and
+ * 1 u32 CONFIG, so 24 types in total for each pin.
+ */
+#define FSL_PIN_SIZE 24
+
+#define IMX_DT_NO_PAD_CTL (1 << 31)
+#define IMX_PAD_SION (1 << 30)
+
+#define IOMUXC_CONFIG_SION (0x1 << 4)
+
+static int imx_iomux_v3_set_state(struct pinctrl_device *pdev, struct device_node *np)
+{
+ struct imx_iomux_v3 *iomux = container_of(pdev, struct imx_iomux_v3, pinctrl);
+ const __be32 *list;
+ int npins, size, i;
+
+ dev_dbg(iomux->pinctrl.dev, "set state: %s\n", np->full_name);
+
+ list = of_get_property(np, "fsl,pins", &size);
+ if (!list)
+ return -EINVAL;
+
+
+ if (!size || size % FSL_PIN_SIZE) {
+ dev_err(iomux->pinctrl.dev, "Invalid fsl,pins property\n");
+ return -EINVAL;
+ }
+
+ npins = size / FSL_PIN_SIZE;
+
+ for (i = 0; i < npins; i++) {
+ u32 mux_reg = be32_to_cpu(*list++);
+ u32 conf_reg = be32_to_cpu(*list++);
+ u32 input_reg = be32_to_cpu(*list++);
+ u32 mux_val = be32_to_cpu(*list++);
+ u32 input_val = be32_to_cpu(*list++);
+ u32 conf_val = be32_to_cpu(*list++);
+
+ if (conf_val & IMX_PAD_SION)
+ mux_val |= IOMUXC_CONFIG_SION;
+
+ if (conf_val & IMX_DT_NO_PAD_CTL)
+ conf_reg = 0;
+
+ imx_iomuxv3_setup_single(iomux->base, iomux->pinctrl.dev,
+ mux_reg, conf_reg, input_reg,
+ mux_val, conf_val, input_val);
+ }
+
+ return 0;
+}
+
+static struct pinctrl_ops imx_iomux_v3_ops = {
+ .set_state = imx_iomux_v3_set_state,
+};
+
+static int imx_pinctrl_dt(struct device_d *dev, void __iomem *base)
+{
+ struct imx_iomux_v3 *iomux;
+ int ret;
+
+ iomux = xzalloc(sizeof(*iomux));
+
+ iomux->base = base;
+
+ iomux->pinctrl.dev = dev;
+ iomux->pinctrl.ops = &imx_iomux_v3_ops;
+
+ ret = pinctrl_register(&iomux->pinctrl);
+ if (ret)
+ free(iomux);
+
+ return ret;
+}
+
+static int imx_iomux_v3_probe(struct device_d *dev)
+{
+ int ret = 0;
+
+ if (iomuxv3_base)
+ return -EBUSY;
+
+ iomuxv3_base = dev_request_mem_region(dev, 0);
+ iomuxv3_dev = dev;
+
+ if (IS_ENABLED(CONFIG_PINCTRL))
+ ret = imx_pinctrl_dt(dev, iomuxv3_base);
+
+ return ret;
+}
+
+static __maybe_unused struct of_device_id imx_iomux_v3_dt_ids[] = {
+ {
+ .compatible = "fsl,imx25-iomuxc",
+ }, {
+ .compatible = "fsl,imx35-iomuxc",
+ }, {
+ .compatible = "fsl,imx51-iomuxc",
+ }, {
+ .compatible = "fsl,imx53-iomuxc",
+ }, {
+ .compatible = "fsl,imx6q-iomuxc",
+ }, {
+ /* sentinel */
+ }
+};
+
+static struct driver_d imx_iomux_v3_driver = {
+ .name = "imx-iomuxv3",
+ .probe = imx_iomux_v3_probe,
+ .of_compatible = DRV_OF_COMPAT(imx_iomux_v3_dt_ids),
+};
+
+static int imx_iomux_v3_init(void)
+{
+ return platform_driver_register(&imx_iomux_v3_driver);
+}
+postcore_initcall(imx_iomux_v3_init);