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ARM: sa1100/neponset: switch PCMCIA to MAX1600 library and gpiod APIs 

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>
This commit is contained in:
Russell King 2018-11-28 13:57:23 +00:00
parent b96e6c01ba
commit e2125d0517
3 changed files with 38 additions and 61 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/arm/mach-sa1100/neponset.c
View File

@ -5,6 +5,7 @@
#include <linux/err.h>
#include <linux/gpio/driver.h>
#include <linux/gpio/gpio-reg.h>
#include <linux/gpio/machine.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/irq.h>
@ -96,6 +97,19 @@ struct neponset_drvdata {
struct gpio_chip *gpio[4];
};
static struct gpiod_lookup_table neponset_pcmcia_table = {
.dev_id = "1800",
.table = {
GPIO_LOOKUP("sa1111", 1, "a0vcc", GPIO_ACTIVE_HIGH),
GPIO_LOOKUP("sa1111", 0, "a1vcc", GPIO_ACTIVE_HIGH),
GPIO_LOOKUP("neponset-ncr", 5, "a0vpp", GPIO_ACTIVE_HIGH),
GPIO_LOOKUP("neponset-ncr", 6, "a1vpp", GPIO_ACTIVE_HIGH),
GPIO_LOOKUP("sa1111", 2, "b0vcc", GPIO_ACTIVE_HIGH),
GPIO_LOOKUP("sa1111", 3, "b1vcc", GPIO_ACTIVE_HIGH),
{ },
},
};
static struct neponset_drvdata *nep;
void neponset_ncr_frob(unsigned int mask, unsigned int val)
@ -374,6 +388,8 @@ static int neponset_probe(struct platform_device *dev)
d->base + AUD_CTL, AUD_NGPIO, false,
neponset_aud_names);
gpiod_add_lookup_table(&neponset_pcmcia_table);
/*
* We would set IRQ_GPIO25 to be a wake-up IRQ, but unfortunately
* something on the Neponset activates this IRQ on sleep (eth?)
@ -424,6 +440,9 @@ static int neponset_remove(struct platform_device *dev)
platform_device_unregister(d->sa1111);
if (!IS_ERR(d->smc91x))
platform_device_unregister(d->smc91x);
gpiod_remove_lookup_table(&neponset_pcmcia_table);
irq_set_chained_handler(irq, NULL);
irq_free_descs(d->irq_base, NEP_IRQ_NR);
nep = NULL;

1
drivers/pcmcia/Kconfig
View File

@ -194,6 +194,7 @@ config PCMCIA_SA1111
select PCMCIA_SOC_COMMON
select PCMCIA_SA11XX_BASE if ARCH_SA1100
select PCMCIA_PXA2XX if ARCH_LUBBOCK && SA1111
select PCMCIA_MAX1600 if ASSABET_NEPONSET
help
Say Y here to include support for SA1111-based PCMCIA or CF
sockets, found on the Jornada 720, Graphicsmaster and other

79
drivers/pcmcia/sa1111_neponset.c
View File

@ -10,12 +10,10 @@
#include <linux/errno.h>
#include <linux/init.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <mach/neponset.h>
#include <asm/hardware/sa1111.h>
#include "sa1111_generic.h"
#include "max1600.h"
/*
* Neponset uses the Maxim MAX1600, with the following connections:
@ -40,70 +38,36 @@
* "Standard Intel code" mode. Refer to the Maxim data sheet for
* the corresponding truth table.
*/
static int neponset_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
struct max1600 *m;
int ret;
ret = max1600_init(skt->socket.dev.parent, &m,
skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,
MAX1600_CODE_LOW);
if (ret == 0)
skt->driver_data = m;
return ret;
}
static int
neponset_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
{
struct sa1111_pcmcia_socket *s = to_skt(skt);
unsigned int ncr_mask, ncr_set, pa_dwr_mask, pa_dwr_set;
struct max1600 *m = skt->driver_data;
int ret;
switch (skt->nr) {
case 0:
pa_dwr_mask = GPIO_A0 | GPIO_A1;
ncr_mask = NCR_A0VPP | NCR_A1VPP;
if (state->Vpp == 0)
ncr_set = 0;
else if (state->Vpp == 120)
ncr_set = NCR_A1VPP;
else if (state->Vpp == state->Vcc)
ncr_set = NCR_A0VPP;
else {
printk(KERN_ERR "%s(): unrecognized VPP %u\n",
__func__, state->Vpp);
return -1;
}
break;
case 1:
pa_dwr_mask = GPIO_A2 | GPIO_A3;
ncr_mask = 0;
ncr_set = 0;
if (state->Vpp != state->Vcc && state->Vpp != 0) {
printk(KERN_ERR "%s(): CF slot cannot support VPP %u\n",
__func__, state->Vpp);
return -1;
}
break;
default:
return -1;
}
/*
* pa_dwr_set is the mask for selecting Vcc on both sockets.
* pa_dwr_mask selects which bits (and therefore socket) we change.
*/
switch (state->Vcc) {
default:
case 0: pa_dwr_set = 0; break;
case 33: pa_dwr_set = GPIO_A1|GPIO_A2; break;
case 50: pa_dwr_set = GPIO_A0|GPIO_A3; break;
}
ret = sa1111_pcmcia_configure_socket(skt, state);
if (ret == 0) {
neponset_ncr_frob(ncr_mask, ncr_set);
sa1111_set_io(s->dev, pa_dwr_mask, pa_dwr_set);
}
if (ret == 0)
ret = max1600_configure(m, state->Vcc, state->Vpp);
return ret;
}
static struct pcmcia_low_level neponset_pcmcia_ops = {
.owner = THIS_MODULE,
.hw_init = neponset_pcmcia_hw_init,
.configure_socket = neponset_pcmcia_configure_socket,
.first = 0,
.nr = 2,
@ -111,13 +75,6 @@ static struct pcmcia_low_level neponset_pcmcia_ops = {
int pcmcia_neponset_init(struct sa1111_dev *sadev)
{
/*
* Set GPIO_A<3:0> to be outputs for the MAX1600,
* and switch to standby mode.
*/
sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0);
sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
sa11xx_drv_pcmcia_ops(&neponset_pcmcia_ops);
return sa1111_pcmcia_add(sadev, &neponset_pcmcia_ops,
sa11xx_drv_pcmcia_add_one);