diff mbox series

[v3,3/7] ARM: OMAP1: ams-delta: Provide GPIO lookup table for NAND data port

Message ID 20180813223448.21316-4-jmkrzyszt@gmail.com (mailing list archive)
State New, archived
Headers show
Series [v3,1/7] mtd: rawnand: ams-delta: show parent device in sysfs | expand

Commit Message

Janusz Krzysztofik Aug. 13, 2018, 10:34 p.m. UTC 
Data port used by Amstrad Delta NAND driver is actually an OMAP MPUIO
device, already under control of gpio-omap driver.  The NAND driver
gets access to the port by ioremapping it and performs read/write
operations.  That is done without any proteciton from other users
legally manipulating the port pins over GPIO API.

The plan is to convert the driver to access the port over GPIO consumer
API.  Before that is implemented, the driver can already obtain
exclusive access to the port by requesting an array of its GPIO
descriptors.

Add respective entries to the NAND GPIO lookup table.

Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/arm/mach-omap1/board-ams-delta.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c
index eedacdfe9725..16f7bbe47607 100644
--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c
@@ -337,7 +337,8 @@  static struct platform_device ams_delta_nand_device = {
 	.resource	= ams_delta_nand_resources,
 };
 
-#define OMAP_GPIO_LABEL	"gpio-0-15"
+#define OMAP_GPIO_LABEL		"gpio-0-15"
+#define OMAP_MPUIO_LABEL	"mpuio"
 
 static struct gpiod_lookup_table ams_delta_nand_gpio_table = {
 	.table = {
@@ -349,6 +350,14 @@  static struct gpiod_lookup_table ams_delta_nand_gpio_table = {
 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_NWE, "nwe", 0),
 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_ALE, "ale", 0),
 		GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_CLE, "cle", 0),
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 0, "data", 0, 0),
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 1, "data", 1, 0),
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 2, "data", 2, 0),
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 3, "data", 3, 0),
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 4, "data", 4, 0),
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 5, "data", 5, 0),
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 6, "data", 6, 0),
+		GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 7, "data", 7, 0),
 		{ },
 	},
 };