aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/pcmcia
diff options
context:
space:
mode:
authorRussell King <rmk+kernel@armlinux.org.uk>2016-08-31 07:49:47 (GMT)
committerRussell King <rmk+kernel@armlinux.org.uk>2018-03-24 14:16:08 (GMT)
commit7be893aa2d6a11d3ff16fe5f614cb94d1cfc9149 (patch)
tree9ce29352fbb4b2e0cdb92668f89c86b0aad8a23d /drivers/pcmcia
parent7928b2cbe55b2a410a0f5c1f154610059c57b1b2 (diff)
pcmcia: sa1100: provide generic CF support
Provide generic non-voltage sensing socket support for StrongARM platforms using the gpiolib and regulator subsystems to obtain the resources to control the socket. Acked-by: Dominik Brodowski <linux@dominikbrodowski.net> (for drivers/pcmcia) Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'drivers/pcmcia')
-rw-r--r--drivers/pcmcia/sa1100_generic.c103
1 files changed, 98 insertions, 5 deletions
diff --git a/drivers/pcmcia/sa1100_generic.c b/drivers/pcmcia/sa1100_generic.c
index 66acdc8..324e3e6 100644
--- a/drivers/pcmcia/sa1100_generic.c
+++ b/drivers/pcmcia/sa1100_generic.c
@@ -31,7 +31,9 @@
======================================================================*/
#include <linux/module.h>
+#include <linux/gpio/consumer.h>
#include <linux/init.h>
+#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
@@ -41,9 +43,61 @@
#include "sa1100_generic.h"
+static const char *sa11x0_cf_gpio_names[] = {
+ [SOC_STAT_CD] = "detect",
+ [SOC_STAT_BVD1] = "bvd1",
+ [SOC_STAT_BVD2] = "bvd2",
+ [SOC_STAT_RDY] = "ready",
+};
+
+static int sa11x0_cf_hw_init(struct soc_pcmcia_socket *skt)
+{
+ struct device *dev = skt->socket.dev.parent;
+ int i;
+
+ skt->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(skt->gpio_reset))
+ return PTR_ERR(skt->gpio_reset);
+
+ skt->gpio_bus_enable = devm_gpiod_get_optional(dev, "bus-enable",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(skt->gpio_bus_enable))
+ return PTR_ERR(skt->gpio_bus_enable);
+
+ skt->vcc.reg = devm_regulator_get_optional(dev, "vcc");
+ if (IS_ERR(skt->vcc.reg))
+ return PTR_ERR(skt->vcc.reg);
+
+ if (!skt->vcc.reg)
+ dev_warn(dev,
+ "no Vcc regulator provided, ignoring Vcc controls\n");
+
+ for (i = 0; i < ARRAY_SIZE(sa11x0_cf_gpio_names); i++) {
+ skt->stat[i].name = sa11x0_cf_gpio_names[i];
+ skt->stat[i].desc = devm_gpiod_get_optional(dev,
+ sa11x0_cf_gpio_names[i], GPIOD_IN);
+ if (IS_ERR(skt->stat[i].desc))
+ return PTR_ERR(skt->stat[i].desc);
+ }
+ return 0;
+}
+
+static int sa11x0_cf_configure_socket(struct soc_pcmcia_socket *skt,
+ const socket_state_t *state)
+{
+ return soc_pcmcia_regulator_set(skt, &skt->vcc, state->Vcc);
+}
+
+static struct pcmcia_low_level sa11x0_cf_ops = {
+ .owner = THIS_MODULE,
+ .hw_init = sa11x0_cf_hw_init,
+ .socket_state = soc_common_cf_socket_state,
+ .configure_socket = sa11x0_cf_configure_socket,
+};
+
int __init pcmcia_collie_init(struct device *dev);
-static int (*sa11x0_pcmcia_hw_init[])(struct device *dev) = {
+static int (*sa11x0_pcmcia_legacy_hw_init[])(struct device *dev) = {
#ifdef CONFIG_SA1100_ASSABET
pcmcia_assabet_init,
#endif
@@ -67,15 +121,15 @@ static int (*sa11x0_pcmcia_hw_init[])(struct device *dev) = {
#endif
};
-static int sa11x0_drv_pcmcia_probe(struct platform_device *dev)
+static int sa11x0_drv_pcmcia_legacy_probe(struct platform_device *dev)
{
int i, ret = -ENODEV;
/*
* Initialise any "on-board" PCMCIA sockets.
*/
- for (i = 0; i < ARRAY_SIZE(sa11x0_pcmcia_hw_init); i++) {
- ret = sa11x0_pcmcia_hw_init[i](&dev->dev);
+ for (i = 0; i < ARRAY_SIZE(sa11x0_pcmcia_legacy_hw_init); i++) {
+ ret = sa11x0_pcmcia_legacy_hw_init[i](&dev->dev);
if (ret == 0)
break;
}
@@ -83,7 +137,7 @@ static int sa11x0_drv_pcmcia_probe(struct platform_device *dev)
return ret;
}
-static int sa11x0_drv_pcmcia_remove(struct platform_device *dev)
+static int sa11x0_drv_pcmcia_legacy_remove(struct platform_device *dev)
{
struct skt_dev_info *sinfo = platform_get_drvdata(dev);
int i;
@@ -96,6 +150,45 @@ static int sa11x0_drv_pcmcia_remove(struct platform_device *dev)
return 0;
}
+static int sa11x0_drv_pcmcia_probe(struct platform_device *pdev)
+{
+ struct soc_pcmcia_socket *skt;
+ struct device *dev = &pdev->dev;
+
+ if (pdev->id == -1)
+ return sa11x0_drv_pcmcia_legacy_probe(pdev);
+
+ skt = devm_kzalloc(dev, sizeof(*skt), GFP_KERNEL);
+ if (!skt)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, skt);
+
+ skt->nr = pdev->id;
+ skt->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(skt->clk))
+ return PTR_ERR(skt->clk);
+
+ sa11xx_drv_pcmcia_ops(&sa11x0_cf_ops);
+ soc_pcmcia_init_one(skt, &sa11x0_cf_ops, dev);
+
+ return sa11xx_drv_pcmcia_add_one(skt);
+}
+
+static int sa11x0_drv_pcmcia_remove(struct platform_device *dev)
+{
+ struct soc_pcmcia_socket *skt;
+
+ if (dev->id == -1)
+ return sa11x0_drv_pcmcia_legacy_remove(dev);
+
+ skt = platform_get_drvdata(dev);
+
+ soc_pcmcia_remove_one(skt);
+
+ return 0;
+}
+
static struct platform_driver sa11x0_pcmcia_driver = {
.driver = {
.name = "sa11x0-pcmcia",

Privacy Policy