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3389b09878
The hardware denies any access from the Linux non-secure world to the secure-protected pins. Hence, prevent any driver to request such a pin. Mark the secure-protected GPIO lines as invalid (.init_valid_mask) and prevent the pinmux request / pinconf setting operations. Identify the secure pins with "NO ACCESS" in the pinconf sysfs. Signed-off-by: Fabien Dessenne <fabien.dessenne@foss.st.com> Link: https://lore.kernel.org/r/20220502153114.283618-1-fabien.dessenne@foss.st.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) Maxime Coquelin 2015
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* Copyright (C) STMicroelectronics 2017
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* Author: Maxime Coquelin <mcoquelin.stm32@gmail.com>
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*/
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#ifndef __PINCTRL_STM32_H
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#define __PINCTRL_STM32_H
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#include <linux/pinctrl/pinctrl.h>
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#include <linux/pinctrl/pinconf-generic.h>
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#define STM32_PIN_NO(x) ((x) << 8)
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#define STM32_GET_PIN_NO(x) ((x) >> 8)
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#define STM32_GET_PIN_FUNC(x) ((x) & 0xff)
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#define STM32_PIN_GPIO 0
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#define STM32_PIN_AF(x) ((x) + 1)
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#define STM32_PIN_ANALOG (STM32_PIN_AF(15) + 1)
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#define STM32_CONFIG_NUM (STM32_PIN_ANALOG + 1)
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/* package information */
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#define STM32MP_PKG_AA BIT(0)
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#define STM32MP_PKG_AB BIT(1)
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#define STM32MP_PKG_AC BIT(2)
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#define STM32MP_PKG_AD BIT(3)
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struct stm32_desc_function {
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const char *name;
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const unsigned char num;
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};
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struct stm32_desc_pin {
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struct pinctrl_pin_desc pin;
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const struct stm32_desc_function functions[STM32_CONFIG_NUM];
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const unsigned int pkg;
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};
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#define STM32_PIN(_pin, ...) \
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{ \
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.pin = _pin, \
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.functions = { \
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__VA_ARGS__}, \
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}
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#define STM32_PIN_PKG(_pin, _pkg, ...) \
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{ \
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.pin = _pin, \
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.pkg = _pkg, \
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.functions = { \
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__VA_ARGS__}, \
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}
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#define STM32_FUNCTION(_num, _name) \
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[_num] = { \
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.num = _num, \
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.name = _name, \
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}
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struct stm32_pinctrl_match_data {
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const struct stm32_desc_pin *pins;
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const unsigned int npins;
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bool secure_control;
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};
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struct stm32_gpio_bank;
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int stm32_pctl_probe(struct platform_device *pdev);
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void stm32_pmx_get_mode(struct stm32_gpio_bank *bank,
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int pin, u32 *mode, u32 *alt);
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int stm32_pinctrl_suspend(struct device *dev);
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int stm32_pinctrl_resume(struct device *dev);
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#endif /* __PINCTRL_STM32_H */
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