From 17723111e64fbcc327846ff0b33532bcf1d40f56 Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Sat, 28 Apr 2012 13:00:50 +0800 Subject: pinctrl: add pinctrl-mxs support Add pinctrl support for Freescale MXS SoCs, i.MX23 and i.MX28. The driver supports device tree probe only. Signed-off-by: Shawn Guo Acked-by: Stephen Warren Signed-off-by: Linus Walleij --- drivers/pinctrl/pinctrl-mxs.h | 91 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 drivers/pinctrl/pinctrl-mxs.h (limited to 'drivers/pinctrl/pinctrl-mxs.h') diff --git a/drivers/pinctrl/pinctrl-mxs.h b/drivers/pinctrl/pinctrl-mxs.h new file mode 100644 index 000000000000..fdd88d0bae22 --- /dev/null +++ b/drivers/pinctrl/pinctrl-mxs.h @@ -0,0 +1,91 @@ +/* + * Copyright 2012 Freescale Semiconductor, Inc. + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#ifndef __PINCTRL_MXS_H +#define __PINCTRL_MXS_H + +#include +#include + +#define SET 0x4 +#define CLR 0x8 +#define TOG 0xc + +#define MXS_PINCTRL_PIN(pin) PINCTRL_PIN(pin, #pin) +#define PINID(bank, pin) ((bank) * 32 + (pin)) + +/* + * pinmux-id bit field definitions + * + * bank: 15..12 (4) + * pin: 11..4 (8) + * muxsel: 3..0 (4) + */ +#define MUXID_TO_PINID(m) PINID((m) >> 12 & 0xf, (m) >> 4 & 0xff) +#define MUXID_TO_MUXSEL(m) ((m) & 0xf) + +#define PINID_TO_BANK(p) ((p) >> 5) +#define PINID_TO_PIN(p) ((p) % 32) + +/* + * pin config bit field definitions + * + * pull-up: 6..5 (2) + * voltage: 4..3 (2) + * mA: 2..0 (3) + * + * MSB of each field is presence bit for the config. + */ +#define PULL_PRESENT (1 << 6) +#define PULL_SHIFT 5 +#define VOL_PRESENT (1 << 4) +#define VOL_SHIFT 3 +#define MA_PRESENT (1 << 2) +#define MA_SHIFT 0 +#define CONFIG_TO_PULL(c) ((c) >> PULL_SHIFT & 0x1) +#define CONFIG_TO_VOL(c) ((c) >> VOL_SHIFT & 0x1) +#define CONFIG_TO_MA(c) ((c) >> MA_SHIFT & 0x3) + +struct mxs_function { + const char *name; + const char **groups; + unsigned ngroups; +}; + +struct mxs_group { + const char *name; + unsigned int *pins; + unsigned npins; + u8 *muxsel; + u8 config; +}; + +struct mxs_regs { + u16 muxsel; + u16 drive; + u16 pull; +}; + +struct mxs_pinctrl_soc_data { + const struct mxs_regs *regs; + const struct pinctrl_pin_desc *pins; + unsigned npins; + struct mxs_function *functions; + unsigned nfunctions; + struct mxs_group *groups; + unsigned ngroups; +}; + +int mxs_pinctrl_probe(struct platform_device *pdev, + struct mxs_pinctrl_soc_data *soc); +int mxs_pinctrl_remove(struct platform_device *pdev); + +#endif /* __PINCTRL_MXS_H */ -- cgit v1.2.3