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ARM: pxa/lubbock: switch PCMCIA to MAX1600 library 

As Lubbock now provides GPIOs via gpiolib for controlling the socket
power, we can use the MAX1600 driver.  Switch Lubbock to use this
driver, which simplifies the code.

Acked-by: Dominik Brodowski <linux@dominikbrodowski.net>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
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 34fdbe6456
commit f1f05ee1b3
3 changed files with 37 additions and 90 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/arm/mach-pxa/lubbock.c
View File

@ -136,10 +136,26 @@ static struct pxa2xx_udc_mach_info udc_info __initdata = {
// no D+ pullup; lubbock can't connect/disconnect in software
};
/* GPIOs for SA1111 PCMCIA */
static struct gpiod_lookup_table sa1111_pcmcia_gpio_table = {
.dev_id = "1800",
.table = {
{ "sa1111", 0, "a0vpp", GPIO_ACTIVE_HIGH },
{ "sa1111", 1, "a1vpp", GPIO_ACTIVE_HIGH },
{ "sa1111", 2, "a0vcc", GPIO_ACTIVE_HIGH },
{ "sa1111", 3, "a1vcc", GPIO_ACTIVE_HIGH },
{ "lubbock", 14, "b0vcc", GPIO_ACTIVE_HIGH },
{ "lubbock", 15, "b1vcc", GPIO_ACTIVE_HIGH },
{ },
},
};
static void lubbock_init_pcmcia(void)
{
struct clk *clk;
gpiod_add_lookup_table(&sa1111_pcmcia_gpio_table);
/* Add an alias for the SA1111 PCMCIA clock */
clk = clk_get_sys("pxa2xx-pcmcia", NULL);
if (!IS_ERR(clk)) {

1
drivers/pcmcia/Kconfig
View File

@ -195,6 +195,7 @@ config PCMCIA_SA1111
select PCMCIA_SA11XX_BASE if ARCH_SA1100
select PCMCIA_PXA2XX if ARCH_LUBBOCK && SA1111
select PCMCIA_MAX1600 if ASSABET_NEPONSET
select PCMCIA_MAX1600 if ARCH_LUBBOCK && SA1111
help
Say Y here to include support for SA1111-based PCMCIA or CF
sockets, found on the Jornada 720, Graphicsmaster and other

110
drivers/pcmcia/sa1111_lubbock.c
View File

@ -24,20 +24,31 @@
#include <mach/hardware.h>
#include <asm/hardware/sa1111.h>
#include <asm/mach-types.h>
#include <mach/lubbock.h>
#include "sa1111_generic.h"
#include "max1600.h"
static int lubbock_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_HIGH);
if (ret == 0)
skt->driver_data = m;
return ret;
}
static int
lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
const socket_state_t *state)
{
struct sa1111_pcmcia_socket *s = to_skt(skt);
unsigned int pa_dwr_mask, pa_dwr_set, misc_mask, misc_set;
struct max1600 *m = skt->driver_data;
int ret = 0;
pa_dwr_mask = pa_dwr_set = misc_mask = misc_set = 0;
/* Lubbock uses the Maxim MAX1602, with the following connections:
*
* Socket 0 (PCMCIA):
@ -71,74 +82,7 @@ lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
again:
switch (skt->nr) {
case 0:
pa_dwr_mask = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3;
switch (state->Vcc) {
case 0: /* Hi-Z */
break;
case 33: /* VY */
pa_dwr_set |= GPIO_A3;
break;
case 50: /* VX */
pa_dwr_set |= GPIO_A2;
break;
default:
printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
__func__, state->Vcc);
ret = -1;
}
switch (state->Vpp) {
case 0: /* Hi-Z */
break;
case 120: /* 12IN */
pa_dwr_set |= GPIO_A1;
break;
default: /* VCC */
if (state->Vpp == state->Vcc)
pa_dwr_set |= GPIO_A0;
else {
printk(KERN_ERR "%s(): unrecognized Vpp %u\n",
__func__, state->Vpp);
ret = -1;
break;
}
}
break;
case 1:
misc_mask = (1 << 15) | (1 << 14);
switch (state->Vcc) {
case 0: /* Hi-Z */
break;
case 33: /* VY */
misc_set |= 1 << 15;
break;
case 50: /* VX */
misc_set |= 1 << 14;
break;
default:
printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
__func__, state->Vcc);
ret = -1;
break;
}
if (state->Vpp != state->Vcc && state->Vpp != 0) {
printk(KERN_ERR "%s(): CF slot cannot support Vpp %u\n",
__func__, state->Vpp);
ret = -1;
break;
}
break;
default:
@ -147,11 +91,8 @@ lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
if (ret == 0)
ret = sa1111_pcmcia_configure_socket(skt, state);
if (ret == 0) {
lubbock_set_misc_wr(misc_mask, misc_set);
sa1111_set_io(s->dev, pa_dwr_mask, pa_dwr_set);
}
if (ret == 0)
ret = max1600_configure(m, state->Vcc, state->Vpp);
#if 1
if (ret == 0 && state->Vcc == 33) {
@ -175,8 +116,7 @@ lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
/*
* Switch to 5V, Configure socket with 5V voltage
*/
lubbock_set_misc_wr(misc_mask, 0);
sa1111_set_io(s->dev, pa_dwr_mask, 0);
max1600_configure(m, 0, 0);
/*
* It takes about 100ms to turn off Vcc.
@ -201,6 +141,7 @@ lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
static struct pcmcia_low_level lubbock_pcmcia_ops = {
.owner = THIS_MODULE,
.hw_init = lubbock_pcmcia_hw_init,
.configure_socket = lubbock_pcmcia_configure_socket,
.first = 0,
.nr = 2,
@ -210,17 +151,6 @@ static struct pcmcia_low_level lubbock_pcmcia_ops = {
int pcmcia_lubbock_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);
/* Set CF Socket 1 power to standby mode. */
lubbock_set_misc_wr((1 << 15) | (1 << 14), 0);
pxa2xx_drv_pcmcia_ops(&lubbock_pcmcia_ops);
pxa2xx_configure_sockets(&sadev->dev, &lubbock_pcmcia_ops);
return sa1111_pcmcia_add(sadev, &lubbock_pcmcia_ops,