diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-01-18 12:37:20 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-02-04 14:32:24 +0000 |
| commit | 76346a4eabf85a44dc425c0197ba46a8884e6090 (patch) | |
| tree | adc6224fe2626cdee005cd7b6589539d2150b2c8 /drivers/pcmcia | |
| parent | 7cf779cb8ddeef797a3a265889c7f088d42a12f7 (diff) | |
| download | lwn-76346a4eabf85a44dc425c0197ba46a8884e6090.tar.gz lwn-76346a4eabf85a44dc425c0197ba46a8884e6090.zip | |
PCMCIA: sa11x0: nanoengine: convert reset handling to use GPIO subsystem
Rather than accessing GPSR and GPCR directly, use the GPIO subsystem
instead.
Acked-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/pcmcia')
| -rw-r--r-- | drivers/pcmcia/sa1100_nanoengine.c | 38 |
1 files changed, 16 insertions, 22 deletions
diff --git a/drivers/pcmcia/sa1100_nanoengine.c b/drivers/pcmcia/sa1100_nanoengine.c index b19b8161395b..cb43e39aef3f 100644 --- a/drivers/pcmcia/sa1100_nanoengine.c +++ b/drivers/pcmcia/sa1100_nanoengine.c @@ -19,6 +19,7 @@ */ #include <linux/device.h> #include <linux/errno.h> +#include <linux/gpio.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/init.h> @@ -37,19 +38,18 @@ struct nanoengine_pins { unsigned output_pins; unsigned clear_outputs; + int gpio_rst; int gpio_cd; int gpio_rdy; }; static struct nanoengine_pins nano_skts[] = { { - .output_pins = GPIO_PC_RESET0, - .clear_outputs = GPIO_PC_RESET0, + .gpio_rst = GPIO_PC_RESET0, .gpio_cd = GPIO_PC_CD0, .gpio_rdy = GPIO_PC_READY0, }, { - .output_pins = GPIO_PC_RESET1, - .clear_outputs = GPIO_PC_RESET1, + .gpio_rst = GPIO_PC_RESET1, .gpio_cd = GPIO_PC_CD1, .gpio_rdy = GPIO_PC_READY1, } @@ -60,12 +60,15 @@ unsigned num_nano_pcmcia_sockets = ARRAY_SIZE(nano_skts); static int nanoengine_pcmcia_hw_init(struct soc_pcmcia_socket *skt) { unsigned i = skt->nr; + int ret; if (i >= num_nano_pcmcia_sockets) return -ENXIO; - GPDR |= nano_skts[i].output_pins; - GPCR = nano_skts[i].clear_outputs; + ret = gpio_request_one(nano_skts[i].gpio_rst, GPIOF_OUT_INIT_LOW, + i ? "PC RST1" : "PC RST0"); + if (ret) + return ret; skt->stat[SOC_STAT_CD].gpio = nano_skts[i].gpio_cd; skt->stat[SOC_STAT_CD].name = i ? "PC CD1" : "PC CD0"; @@ -75,30 +78,20 @@ static int nanoengine_pcmcia_hw_init(struct soc_pcmcia_socket *skt) return 0; } +static void nanoengine_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) +{ + gpio_free(nano_skts[skt->nr].gpio_rst); +} + static int nanoengine_pcmcia_configure_socket( struct soc_pcmcia_socket *skt, const socket_state_t *state) { - unsigned reset; unsigned i = skt->nr; if (i >= num_nano_pcmcia_sockets) return -ENXIO; - switch (i) { - case 0: - reset = GPIO_PC_RESET0; - break; - case 1: - reset = GPIO_PC_RESET1; - break; - default: - return -ENXIO; - } - - if (state->flags & SS_RESET) - GPSR = reset; - else - GPCR = reset; + gpio_set_value(nano_skts[skt->nr].gpio_rst, !!(state->flags & SS_RESET)); return 0; } @@ -122,6 +115,7 @@ static struct pcmcia_low_level nanoengine_pcmcia_ops = { .owner = THIS_MODULE, .hw_init = nanoengine_pcmcia_hw_init, + .hw_shutdown = nanoengine_pcmcia_hw_shutdown, .configure_socket = nanoengine_pcmcia_configure_socket, .socket_state = nanoengine_pcmcia_socket_state, |