e2125d0517
Convert Neponset to use the gpiod API to specify which GPIOs are used for PCMCIA, and use the MAX1600 power switch library for Neponset, simplifying the neponset pcmcia driver as a result. Acked-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
82 lines
2 KiB
C
82 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/drivers/pcmcia/sa1100_neponset.c
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*
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* Neponset PCMCIA specific routines
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <asm/mach-types.h>
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#include "sa1111_generic.h"
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#include "max1600.h"
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/*
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* Neponset uses the Maxim MAX1600, with the following connections:
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*
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* MAX1600 Neponset
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*
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* A0VCC SA-1111 GPIO A<1>
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* A1VCC SA-1111 GPIO A<0>
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* A0VPP CPLD NCR A0VPP
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* A1VPP CPLD NCR A1VPP
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* B0VCC SA-1111 GPIO A<2>
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* B1VCC SA-1111 GPIO A<3>
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* B0VPP ground (slot B is CF)
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* B1VPP ground (slot B is CF)
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*
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* VX VCC (5V)
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* VY VCC3_3 (3.3V)
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* 12INA 12V
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* 12INB ground (slot B is CF)
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*
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* The MAX1600 CODE pin is tied to ground, placing the device in
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* "Standard Intel code" mode. Refer to the Maxim data sheet for
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* the corresponding truth table.
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*/
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static int neponset_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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struct max1600 *m;
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int ret;
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ret = max1600_init(skt->socket.dev.parent, &m,
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skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,
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MAX1600_CODE_LOW);
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if (ret == 0)
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skt->driver_data = m;
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return ret;
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}
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static int
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neponset_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
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{
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struct max1600 *m = skt->driver_data;
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int ret;
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ret = sa1111_pcmcia_configure_socket(skt, state);
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if (ret == 0)
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ret = max1600_configure(m, state->Vcc, state->Vpp);
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return ret;
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}
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static struct pcmcia_low_level neponset_pcmcia_ops = {
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.owner = THIS_MODULE,
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.hw_init = neponset_pcmcia_hw_init,
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.configure_socket = neponset_pcmcia_configure_socket,
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.first = 0,
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.nr = 2,
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};
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int pcmcia_neponset_init(struct sa1111_dev *sadev)
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{
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sa11xx_drv_pcmcia_ops(&neponset_pcmcia_ops);
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return sa1111_pcmcia_add(sadev, &neponset_pcmcia_ops,
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sa11xx_drv_pcmcia_add_one);
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}
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