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The current simplify lpc32xx gpio driver implementation assume a maximum of 32 GPIO per port; there are a total of 22 GPI, 24 GPO and 6 GPIO to managed on port 3. Update the driver to fix the following: 1) When requesting GPI_xx and GPO_xx on port 3 (xx is the same number) the second call to "gpio_request" will return -EBUSY. 2) The status of GPO_xx pin report the status of the corresponding GPI_xx pin when using the "gpio status" command. 3) The gpio driver may setup the direction register for the wrong gpio when calling "gpio_direction_input" (GPI_xx) or "gpio_direction_output" (GPO_xx) on port 3; the call to the direction is require to use the "gpio status" command. The following change were done in the driver: 1) port3 GPI are cache in a separate 32 bits in the array. 2) port3 direction register written only for GPIO pins. 3) port3 GPO & GPIO (as output) are read using "p3_outp_state". 4) LPC32XX_GPI_P3_GRP updated to match the change. Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>
40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/*
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* LPC32xx GPIO interface macro for pin mapping.
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*
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* (C) Copyright 2015 DENX Software Engineering GmbH
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* Written-by: Sylvain Lemieux <slemieux@@tycoint.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _LPC32XX_GPIO_GRP_H
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#define _LPC32XX_GPIO_GRP_H
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/*
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* Macro to map the pin for the lpc32xx_gpio driver.
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* Note: - GPIOS are considered here as homogeneous and linear from 0 to 159;
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* mapping is done per register, as group of 32.
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* (see drivers/gpio/lpc32xx_gpio.c for details).
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* - macros can be use with the following pins:
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* P0.0 - P0.7
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* P1.0 - P1.23
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* P2.0 - P2.12
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* P3 GPI_0 - GPI_9 / GPI_15 - GPI_23 / GPI_25 / GPI_27 - GPI_28
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* P3 GPO_0 - GPO_23
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* P3 GPIO_0 - GPIO_5 (output register only)
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*/
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#define LPC32XX_GPIO_P0_GRP 0
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#define LPC32XX_GPIO_P1_GRP 32
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#define LPC32XX_GPIO_P2_GRP 64
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#define LPC32XX_GPO_P3_GRP 96
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#define LPC32XX_GPIO_P3_GRP (LPC32XX_GPO_P3_GRP + 25)
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#define LPC32XX_GPI_P3_GRP 128
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/*
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* A specific GPIO can be selected with this macro
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* ie, GPIO P0.1 can be selected with LPC32XX_GPIO(LPC32XX_GPIO_P0_GRP, 1)
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* See the LPC32x0 User's guide for GPIO group numbers
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*/
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#define LPC32XX_GPIO(x, y) ((x) + (y))
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#endif /* _LPC32XX_GPIO_GRP_H */
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