mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-27 13:05:03 +08:00
b96e6c01ba
Convert the low level PCMCIA driver to gpiod APIs for controlling the socket power. Acked-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
139 lines
3.0 KiB
C
139 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* drivers/pcmcia/sa1100_jornada720.c
|
|
*
|
|
* Jornada720 PCMCIA specific routines
|
|
*
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/device.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <mach/hardware.h>
|
|
#include <asm/mach-types.h>
|
|
|
|
#include "sa1111_generic.h"
|
|
|
|
/*
|
|
* Socket 0 power: GPIO A0
|
|
* Socket 0 3V: GPIO A2
|
|
* Socket 1 power: GPIO A1 & GPIO A3
|
|
* Socket 1 3V: GPIO A3
|
|
* Does Socket 1 3V actually do anything?
|
|
*/
|
|
enum {
|
|
J720_GPIO_PWR,
|
|
J720_GPIO_3V,
|
|
J720_GPIO_MAX,
|
|
};
|
|
struct jornada720_data {
|
|
struct gpio_desc *gpio[J720_GPIO_MAX];
|
|
};
|
|
|
|
static int jornada720_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
|
|
{
|
|
struct device *dev = skt->socket.dev.parent;
|
|
struct jornada720_data *j;
|
|
|
|
j = devm_kzalloc(dev, sizeof(*j), GFP_KERNEL);
|
|
if (!j)
|
|
return -ENOMEM;
|
|
|
|
j->gpio[J720_GPIO_PWR] = devm_gpiod_get(dev, skt->nr ? "s1-power" :
|
|
"s0-power", GPIOD_OUT_LOW);
|
|
if (IS_ERR(j->gpio[J720_GPIO_PWR]))
|
|
return PTR_ERR(j->gpio[J720_GPIO_PWR]);
|
|
|
|
j->gpio[J720_GPIO_3V] = devm_gpiod_get(dev, skt->nr ? "s1-3v" :
|
|
"s0-3v", GPIOD_OUT_LOW);
|
|
if (IS_ERR(j->gpio[J720_GPIO_3V]))
|
|
return PTR_ERR(j->gpio[J720_GPIO_3V]);
|
|
|
|
skt->driver_data = j;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
jornada720_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
|
|
{
|
|
struct jornada720_data *j = skt->driver_data;
|
|
DECLARE_BITMAP(values, J720_GPIO_MAX) = { 0, };
|
|
int ret;
|
|
|
|
printk(KERN_INFO "%s(): config socket %d vcc %d vpp %d\n", __func__,
|
|
skt->nr, state->Vcc, state->Vpp);
|
|
|
|
switch (skt->nr) {
|
|
case 0:
|
|
switch (state->Vcc) {
|
|
default:
|
|
case 0:
|
|
__assign_bit(J720_GPIO_PWR, values, 0);
|
|
__assign_bit(J720_GPIO_3V, values, 0);
|
|
break;
|
|
case 33:
|
|
__assign_bit(J720_GPIO_PWR, values, 1);
|
|
__assign_bit(J720_GPIO_3V, values, 1);
|
|
break;
|
|
case 50:
|
|
__assign_bit(J720_GPIO_PWR, values, 1);
|
|
__assign_bit(J720_GPIO_3V, values, 0);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case 1:
|
|
switch (state->Vcc) {
|
|
default:
|
|
case 0:
|
|
__assign_bit(J720_GPIO_PWR, values, 0);
|
|
__assign_bit(J720_GPIO_3V, values, 0);
|
|
break;
|
|
case 33:
|
|
case 50:
|
|
__assign_bit(J720_GPIO_PWR, values, 1);
|
|
__assign_bit(J720_GPIO_3V, values, 1);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
if (state->Vpp != state->Vcc && state->Vpp != 0) {
|
|
printk(KERN_ERR "%s(): slot cannot support VPP %u\n",
|
|
__func__, state->Vpp);
|
|
return -EPERM;
|
|
}
|
|
|
|
ret = sa1111_pcmcia_configure_socket(skt, state);
|
|
if (ret == 0)
|
|
ret = gpiod_set_array_value_cansleep(J720_GPIO_MAX, j->gpio,
|
|
NULL, values);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct pcmcia_low_level jornada720_pcmcia_ops = {
|
|
.owner = THIS_MODULE,
|
|
.hw_init = jornada720_pcmcia_hw_init,
|
|
.configure_socket = jornada720_pcmcia_configure_socket,
|
|
.first = 0,
|
|
.nr = 2,
|
|
};
|
|
|
|
int pcmcia_jornada720_init(struct sa1111_dev *sadev)
|
|
{
|
|
/* Fixme: why messing around with SA11x0's GPIO1? */
|
|
GRER |= 0x00000002;
|
|
|
|
sa11xx_drv_pcmcia_ops(&jornada720_pcmcia_ops);
|
|
return sa1111_pcmcia_add(sadev, &jornada720_pcmcia_ops,
|
|
sa11xx_drv_pcmcia_add_one);
|
|
}
|