From mboxrd@z Thu Jan 1 00:00:00 1970 From: nicolas.ferre@atmel.com (Nicolas Ferre) Date: Thu, 21 Mar 2013 12:40:15 +0100 Subject: [PATCH v2 5/7] pcmcia: at91_cf: add support for DT In-Reply-To: References: Message-ID: <78897f40c3e0af827536464e34888413090921e8.1363865228.git.nicolas.ferre@atmel.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Joachim Eastwood Signed-off-by: Joachim Eastwood Signed-off-by: Nicolas Ferre --- .../devicetree/bindings/ata/atmel-at91_cf.txt | 19 +++++++++ drivers/pcmcia/Kconfig | 2 +- drivers/pcmcia/at91_cf.c | 45 +++++++++++++++++++++- 3 files changed, 64 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/ata/atmel-at91_cf.txt diff --git a/Documentation/devicetree/bindings/ata/atmel-at91_cf.txt b/Documentation/devicetree/bindings/ata/atmel-at91_cf.txt new file mode 100644 index 0000000..c1d22b3 --- /dev/null +++ b/Documentation/devicetree/bindings/ata/atmel-at91_cf.txt @@ -0,0 +1,19 @@ +Atmel AT91RM9200 CompactFlash + +Required properties: +- compatible : "atmel,at91rm9200-cf". +- reg : should specify localbus address and size used. +- gpios : specifies the gpio pins to control the CF device. Detect + and reset gpio's are mandatory while irq and vcc gpio's are + optional and may be set to 0 if not present. + +Example: +compact-flash at 50000000 { + compatible = "atmel,at91rm9200-cf"; + reg = <0x50000000 0x30000000>; + gpios = <&pioC 13 0 /* irq */ + &pioC 15 0 /* detect */ + 0 /* vcc */ + &pioC 5 0 /* reset */ + >; +}; diff --git a/drivers/pcmcia/Kconfig b/drivers/pcmcia/Kconfig index b90f85b..80faa56 100644 --- a/drivers/pcmcia/Kconfig +++ b/drivers/pcmcia/Kconfig @@ -288,7 +288,7 @@ config BFIN_CFPCMCIA config AT91_CF tristate "AT91 CompactFlash Controller" - depends on PCMCIA && ARCH_AT91RM9200 + depends on PCMCIA && ARCH_AT91 help Say Y here to support the CompactFlash controller on AT91 chips. Or choose M to compile the driver as a module named "at91_cf". diff --git a/drivers/pcmcia/at91_cf.c b/drivers/pcmcia/at91_cf.c index bce8a64..149b95c 100644 --- a/drivers/pcmcia/at91_cf.c +++ b/drivers/pcmcia/at91_cf.c @@ -20,6 +20,9 @@ #include #include #include +#include +#include +#include #include @@ -211,6 +214,37 @@ static struct pccard_operations at91_cf_ops = { /*--------------------------------------------------------------------------*/ +#if defined(CONFIG_OF) +static const struct of_device_id at91_cf_dt_ids[] = { + { .compatible = "atmel,at91rm9200-cf" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, at91_cf_dt_ids); + +static int at91_cf_dt_init(struct platform_device *pdev) +{ + struct at91_cf_data *board; + + board = devm_kzalloc(&pdev->dev, sizeof(*board), GFP_KERNEL); + if (!board) + return -ENOMEM; + + board->irq_pin = of_get_gpio(pdev->dev.of_node, 0); + board->det_pin = of_get_gpio(pdev->dev.of_node, 1); + board->vcc_pin = of_get_gpio(pdev->dev.of_node, 2); + board->rst_pin = of_get_gpio(pdev->dev.of_node, 3); + + pdev->dev.platform_data = board; + + return 0; +} +#else +static int at91_cf_dt_init(struct platform_device *pdev) +{ + return -ENODEV; +} +#endif + static int __init at91_cf_probe(struct platform_device *pdev) { struct at91_cf_socket *cf; @@ -218,7 +252,15 @@ static int __init at91_cf_probe(struct platform_device *pdev) struct resource *io; int status; - if (!board || !gpio_is_valid(board->det_pin) || !gpio_is_valid(board->rst_pin)) + if (!board) { + status = at91_cf_dt_init(pdev); + if (status) + return status; + + board = pdev->dev.platform_data; + } + + if (!gpio_is_valid(board->det_pin) || !gpio_is_valid(board->rst_pin)) return -ENODEV; io = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -360,6 +402,7 @@ static struct platform_driver at91_cf_driver = { .driver = { .name = "at91_cf", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(at91_cf_dt_ids), }, .remove = __exit_p(at91_cf_remove), .suspend = at91_cf_suspend, -- 1.8.0