mirror of https://gitee.com/openkylin/linux.git
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>
This commit is contained in:
Russell King
parent
7928b2cbe5
commit
7be893aa2d
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@ -31,7 +31,9 @@
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======================================================================*/
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#include <linux/module.h>
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#include <linux/gpio/consumer.h>
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#include <linux/init.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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@ -41,9 +43,61 @@
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#include "sa1100_generic.h"
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static const char *sa11x0_cf_gpio_names[] = {
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[SOC_STAT_CD] = "detect",
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[SOC_STAT_BVD1] = "bvd1",
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[SOC_STAT_BVD2] = "bvd2",
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[SOC_STAT_RDY] = "ready",
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};
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static int sa11x0_cf_hw_init(struct soc_pcmcia_socket *skt)
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{
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struct device *dev = skt->socket.dev.parent;
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int i;
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skt->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
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if (IS_ERR(skt->gpio_reset))
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return PTR_ERR(skt->gpio_reset);
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skt->gpio_bus_enable = devm_gpiod_get_optional(dev, "bus-enable",
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GPIOD_OUT_HIGH);
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if (IS_ERR(skt->gpio_bus_enable))
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return PTR_ERR(skt->gpio_bus_enable);
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skt->vcc.reg = devm_regulator_get_optional(dev, "vcc");
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if (IS_ERR(skt->vcc.reg))
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return PTR_ERR(skt->vcc.reg);
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if (!skt->vcc.reg)
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dev_warn(dev,
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"no Vcc regulator provided, ignoring Vcc controls\n");
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for (i = 0; i < ARRAY_SIZE(sa11x0_cf_gpio_names); i++) {
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skt->stat[i].name = sa11x0_cf_gpio_names[i];
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skt->stat[i].desc = devm_gpiod_get_optional(dev,
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sa11x0_cf_gpio_names[i], GPIOD_IN);
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if (IS_ERR(skt->stat[i].desc))
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return PTR_ERR(skt->stat[i].desc);
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}
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return 0;
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}
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static int sa11x0_cf_configure_socket(struct soc_pcmcia_socket *skt,
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const socket_state_t *state)
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{
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return soc_pcmcia_regulator_set(skt, &skt->vcc, state->Vcc);
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}
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static struct pcmcia_low_level sa11x0_cf_ops = {
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.owner = THIS_MODULE,
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.hw_init = sa11x0_cf_hw_init,
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.socket_state = soc_common_cf_socket_state,
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.configure_socket = sa11x0_cf_configure_socket,
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};
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int __init pcmcia_collie_init(struct device *dev);
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static int (*sa11x0_pcmcia_hw_init[])(struct device *dev) = {
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static int (*sa11x0_pcmcia_legacy_hw_init[])(struct device *dev) = {
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#ifdef CONFIG_SA1100_ASSABET
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pcmcia_assabet_init,
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#endif
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@ -67,15 +121,15 @@ static int (*sa11x0_pcmcia_hw_init[])(struct device *dev) = {
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#endif
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};
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static int sa11x0_drv_pcmcia_probe(struct platform_device *dev)
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static int sa11x0_drv_pcmcia_legacy_probe(struct platform_device *dev)
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{
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int i, ret = -ENODEV;
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/*
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* Initialise any "on-board" PCMCIA sockets.
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*/
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for (i = 0; i < ARRAY_SIZE(sa11x0_pcmcia_hw_init); i++) {
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ret = sa11x0_pcmcia_hw_init[i](&dev->dev);
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for (i = 0; i < ARRAY_SIZE(sa11x0_pcmcia_legacy_hw_init); i++) {
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ret = sa11x0_pcmcia_legacy_hw_init[i](&dev->dev);
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if (ret == 0)
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break;
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}
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@ -83,7 +137,7 @@ static int sa11x0_drv_pcmcia_probe(struct platform_device *dev)
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return ret;
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}
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static int sa11x0_drv_pcmcia_remove(struct platform_device *dev)
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static int sa11x0_drv_pcmcia_legacy_remove(struct platform_device *dev)
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{
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struct skt_dev_info *sinfo = platform_get_drvdata(dev);
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int i;
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@ -96,6 +150,45 @@ static int sa11x0_drv_pcmcia_remove(struct platform_device *dev)
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return 0;
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}
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static int sa11x0_drv_pcmcia_probe(struct platform_device *pdev)
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{
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struct soc_pcmcia_socket *skt;
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struct device *dev = &pdev->dev;
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if (pdev->id == -1)
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return sa11x0_drv_pcmcia_legacy_probe(pdev);
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skt = devm_kzalloc(dev, sizeof(*skt), GFP_KERNEL);
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if (!skt)
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return -ENOMEM;
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platform_set_drvdata(pdev, skt);
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skt->nr = pdev->id;
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skt->clk = devm_clk_get(dev, NULL);
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if (IS_ERR(skt->clk))
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return PTR_ERR(skt->clk);
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sa11xx_drv_pcmcia_ops(&sa11x0_cf_ops);
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soc_pcmcia_init_one(skt, &sa11x0_cf_ops, dev);
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return sa11xx_drv_pcmcia_add_one(skt);
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}
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static int sa11x0_drv_pcmcia_remove(struct platform_device *dev)
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{
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struct soc_pcmcia_socket *skt;
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if (dev->id == -1)
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return sa11x0_drv_pcmcia_legacy_remove(dev);
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skt = platform_get_drvdata(dev);
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soc_pcmcia_remove_one(skt);
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return 0;
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}
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static struct platform_driver sa11x0_pcmcia_driver = {
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.driver = {
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.name = "sa11x0-pcmcia",
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