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>

1 files changed, 98 insertions, 5 deletions

diff --git a/drivers/pcmcia/sa1100_generic.c b/drivers/pcmcia/sa1100_generic.c
index 66acdc85727c..324e3e631353 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",