treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / pcmcia / pxa2xx_cm_x270.c
blob36e35da5f887be50c2edb5650719dbb712999278
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/drivers/pcmcia/pxa/pxa_cm_x270.c
5 * Compulab Ltd., 2003, 2007, 2008
6 * Mike Rapoport <mike@compulab.co.il>
7 */
9 #include <linux/platform_device.h>
10 #include <linux/irq.h>
11 #include <linux/delay.h>
12 #include <linux/gpio.h>
13 #include <linux/export.h>
15 #include "soc_common.h"
17 #define GPIO_PCMCIA_S0_CD_VALID (84)
18 #define GPIO_PCMCIA_S0_RDYINT (82)
19 #define GPIO_PCMCIA_RESET (53)
21 static int cmx270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
23 int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset");
24 if (ret)
25 return ret;
26 gpio_direction_output(GPIO_PCMCIA_RESET, 0);
28 skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S0_CD_VALID;
29 skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
30 skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S0_RDYINT;
31 skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
33 return ret;
36 static void cmx270_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
38 gpio_free(GPIO_PCMCIA_RESET);
42 static void cmx270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
43 struct pcmcia_state *state)
45 state->vs_3v = 0;
46 state->vs_Xv = 0;
50 static int cmx270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
51 const socket_state_t *state)
53 switch (skt->nr) {
54 case 0:
55 if (state->flags & SS_RESET) {
56 gpio_set_value(GPIO_PCMCIA_RESET, 1);
57 udelay(10);
58 gpio_set_value(GPIO_PCMCIA_RESET, 0);
60 break;
63 return 0;
66 static struct pcmcia_low_level cmx270_pcmcia_ops __initdata = {
67 .owner = THIS_MODULE,
68 .hw_init = cmx270_pcmcia_hw_init,
69 .hw_shutdown = cmx270_pcmcia_shutdown,
70 .socket_state = cmx270_pcmcia_socket_state,
71 .configure_socket = cmx270_pcmcia_configure_socket,
72 .nr = 1,
75 static struct platform_device *cmx270_pcmcia_device;
77 int __init cmx270_pcmcia_init(void)
79 int ret;
81 cmx270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
83 if (!cmx270_pcmcia_device)
84 return -ENOMEM;
86 ret = platform_device_add_data(cmx270_pcmcia_device, &cmx270_pcmcia_ops,
87 sizeof(cmx270_pcmcia_ops));
89 if (ret == 0) {
90 printk(KERN_INFO "Registering cm-x270 PCMCIA interface.\n");
91 ret = platform_device_add(cmx270_pcmcia_device);
94 if (ret)
95 platform_device_put(cmx270_pcmcia_device);
97 return ret;
100 void __exit cmx270_pcmcia_exit(void)
102 platform_device_unregister(cmx270_pcmcia_device);