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17723111e6
Add pinctrl support for Freescale MXS SoCs, i.MX23 and i.MX28. The driver supports device tree probe only. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
/*
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* Copyright 2012 Freescale Semiconductor, Inc.
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#ifndef __PINCTRL_MXS_H
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#define __PINCTRL_MXS_H
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#include <linux/platform_device.h>
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#include <linux/pinctrl/pinctrl.h>
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#define SET 0x4
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#define CLR 0x8
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#define TOG 0xc
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#define MXS_PINCTRL_PIN(pin) PINCTRL_PIN(pin, #pin)
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#define PINID(bank, pin) ((bank) * 32 + (pin))
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/*
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* pinmux-id bit field definitions
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*
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* bank: 15..12 (4)
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* pin: 11..4 (8)
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* muxsel: 3..0 (4)
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*/
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#define MUXID_TO_PINID(m) PINID((m) >> 12 & 0xf, (m) >> 4 & 0xff)
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#define MUXID_TO_MUXSEL(m) ((m) & 0xf)
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#define PINID_TO_BANK(p) ((p) >> 5)
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#define PINID_TO_PIN(p) ((p) % 32)
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/*
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* pin config bit field definitions
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*
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* pull-up: 6..5 (2)
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* voltage: 4..3 (2)
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* mA: 2..0 (3)
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*
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* MSB of each field is presence bit for the config.
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*/
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#define PULL_PRESENT (1 << 6)
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#define PULL_SHIFT 5
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#define VOL_PRESENT (1 << 4)
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#define VOL_SHIFT 3
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#define MA_PRESENT (1 << 2)
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#define MA_SHIFT 0
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#define CONFIG_TO_PULL(c) ((c) >> PULL_SHIFT & 0x1)
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#define CONFIG_TO_VOL(c) ((c) >> VOL_SHIFT & 0x1)
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#define CONFIG_TO_MA(c) ((c) >> MA_SHIFT & 0x3)
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struct mxs_function {
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const char *name;
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const char **groups;
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unsigned ngroups;
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};
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struct mxs_group {
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const char *name;
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unsigned int *pins;
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unsigned npins;
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u8 *muxsel;
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u8 config;
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};
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struct mxs_regs {
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u16 muxsel;
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u16 drive;
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u16 pull;
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};
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struct mxs_pinctrl_soc_data {
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const struct mxs_regs *regs;
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const struct pinctrl_pin_desc *pins;
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unsigned npins;
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struct mxs_function *functions;
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unsigned nfunctions;
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struct mxs_group *groups;
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unsigned ngroups;
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};
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int mxs_pinctrl_probe(struct platform_device *pdev,
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struct mxs_pinctrl_soc_data *soc);
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int mxs_pinctrl_remove(struct platform_device *pdev);
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#endif /* __PINCTRL_MXS_H */
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