diff options
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/pinctrl/Makefile | 1 | ||||
| -rw-r--r-- | drivers/pinctrl/imx-iomux-v3.c | 212 |
3 files changed, 219 insertions, 0 deletions
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 05adf59f58..6ce01bffe8 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 59f096a65a..134c889c99 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 0000000000..3ff3c1571d --- /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); |