[PATCH 1/1 v2] MTD: atmel nand: fix gpio missing request
Jean-Christophe PLAGNIOL-VILLARD
plagnioj at jcrosoft.com
Thu Jul 12 04:31:08 EDT 2012
without this the gpio will not be muxed as a gpio by the current custom pinmux
or later by the pinctrl
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre at atmel.com>
---
V2:
set the direction too
today this is invisible as you mostly boot from nand and the
bootloader configured them but if you load the kernel via nor you need
to do it
Best Regards,
J.
drivers/mtd/nand/atmel_nand.c | 56 ++++++++++++++++++++++++++++++++++++++++-
1 file changed, 55 insertions(+), 1 deletion(-)
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index 97ac671..eef9f80 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -583,8 +583,39 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
nand_chip->IO_ADDR_W = host->io_base;
nand_chip->cmd_ctrl = atmel_nand_cmd_ctrl;
- if (gpio_is_valid(host->board.rdy_pin))
+ if (gpio_is_valid(host->board.rdy_pin)) {
+ res = gpio_request(host->board.rdy_pin, "nand_rdy");
+ if (res < 0) {
+ dev_err(&pdev->dev,
+ "can't request rdy gpio %d\n", host->board.rdy_pin);
+ goto err_ecc_ioremap;
+ }
+
+ res = gpio_direction_input(host->board.rdy_pin);
+ if (res < 0) {
+ dev_err(&pdev->dev,
+ "can't request input direction rdy gpio %d\n", host->board.rdy_pin);
+ goto err_ecc_ioremap;
+ }
+
nand_chip->dev_ready = atmel_nand_device_ready;
+ }
+
+ if (gpio_is_valid(host->board.enable_pin)) {
+ res = gpio_request(host->board.enable_pin, "nand_enable");
+ if (res < 0) {
+ dev_err(&pdev->dev,
+ "can't request enable gpio %d\n", host->board.enable_pin);
+ goto err_ecc_ioremap;
+ }
+
+ res = gpio_direction_output(host->board.enable_pin, 1);
+ if (res < 0) {
+ dev_err(&pdev->dev,
+ "can't request output direction enable gpio %d\n", host->board.enable_pin);
+ goto err_ecc_ioremap;
+ }
+ }
nand_chip->ecc.mode = host->board.ecc_mode;
@@ -622,6 +653,20 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
atmel_nand_enable(host);
if (gpio_is_valid(host->board.det_pin)) {
+ res = gpio_request(host->board.det_pin, "nand_det");
+ if (res < 0) {
+ dev_err(&pdev->dev,
+ "can't request det gpio %d\n", host->board.det_pin);
+ goto err_no_card;
+ }
+
+ res = gpio_direction_input(host->board.det_pin);
+ if (res < 0) {
+ dev_err(&pdev->dev,
+ "can't request input direction det gpio %d\n", host->board.det_pin);
+ goto err_no_card;
+ }
+
if (gpio_get_value(host->board.det_pin)) {
printk(KERN_INFO "No SmartMedia card inserted.\n");
res = -ENXIO;
@@ -738,6 +783,15 @@ static int __exit atmel_nand_remove(struct platform_device *pdev)
atmel_nand_disable(host);
+ if (gpio_is_valid(host->board.det_pin))
+ gpio_free(host->board.det_pin);
+
+ if (gpio_is_valid(host->board.enable_pin))
+ gpio_free(host->board.enable_pin);
+
+ if (gpio_is_valid(host->board.rdy_pin))
+ gpio_free(host->board.rdy_pin);
+
if (host->ecc)
iounmap(host->ecc);
--
1.7.10
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