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authorLinus Walleij <linus.walleij@linaro.org>2014-01-22 14:21:28 +0100
committerLinus Walleij <linus.walleij@linaro.org>2014-08-19 12:14:48 -0500
commit684284b64aae96c8d5de0dc0d6e4b72f8b3502ce (patch)
treecdccfb966afff1c4aea1bf263448f51bdecc7dc3 /arch/arm/mach-integrator
parent7d1311b93e58ed55f3a31cc8f94c4b8fe988a2b9 (diff)
downloadop-kernel-dev-684284b64aae96c8d5de0dc0d6e4b72f8b3502ce.zip
op-kernel-dev-684284b64aae96c8d5de0dc0d6e4b72f8b3502ce.tar.gz
ARM: integrator: add MMCI device to IM-PD1
The IM-PD1 logic module daughterboard holds an MMCI block, which we can now provide using platform resources such as proper GPIO lines etc. We add the GPIO table dynamically and using the new GPIO descriptor mechanism. Tested and hey, it works: root@integrator:/ mount /dev/mmcblk0p1 /mnt/ root@integrator:/ ls /mnt/ ARM U-BOOT.EXE u-boot.bin u-boot.srec u-pad.bin Reviewed-by: Alexandre Courbot <gnurou@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'arch/arm/mach-integrator')
-rw-r--r--arch/arm/mach-integrator/impd1.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/arm/mach-integrator/impd1.c b/arch/arm/mach-integrator/impd1.c
index 3ce8807..38b0da3 100644
--- a/arch/arm/mach-integrator/impd1.c
+++ b/arch/arm/mach-integrator/impd1.c
@@ -20,10 +20,13 @@
#include <linux/mm.h>
#include <linux/amba/bus.h>
#include <linux/amba/clcd.h>
+#include <linux/amba/mmci.h>
+#include <linux/amba/pl061.h>
#include <linux/io.h>
#include <linux/platform_data/clk-integrator.h>
#include <linux/slab.h>
#include <linux/irqchip/arm-vic.h>
+#include <linux/gpio/machine.h>
#include <asm/sizes.h>
#include "lm.h"
@@ -52,6 +55,13 @@ void impd1_tweak_control(struct device *dev, u32 mask, u32 val)
EXPORT_SYMBOL(impd1_tweak_control);
/*
+ * MMC support
+ */
+static struct mmci_platform_data mmc_data = {
+ .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
+};
+
+/*
* CLCD support
*/
#define PANEL PROSPECTOR
@@ -291,6 +301,7 @@ static struct impd1_device impd1_devs[] = {
.offset = 0x00700000,
.irq = { 7, 8 },
.id = 0x00041181,
+ .platform_data = &mmc_data,
}, {
.offset = 0x00800000,
.irq = { 9 },
@@ -372,6 +383,43 @@ static int __init_refok impd1_probe(struct lm_device *dev)
pc_base = dev->resource.start + idev->offset;
snprintf(devname, 32, "lm%x:%5.5lx", dev->id, idev->offset >> 12);
+
+ /* Add GPIO descriptor lookup table for the PL061 block */
+ if (idev->offset == 0x00400000) {
+ struct gpiod_lookup_table *lookup;
+ char *chipname;
+ char *mmciname;
+
+ lookup = devm_kzalloc(&dev->dev,
+ sizeof(*lookup) + 3 * sizeof(struct gpiod_lookup),
+ GFP_KERNEL);
+ chipname = devm_kstrdup(&dev->dev, devname, GFP_KERNEL);
+ mmciname = kasprintf(GFP_KERNEL, "lm%x:00700", dev->id);
+ lookup->dev_id = mmciname;
+ /*
+ * Offsets on GPIO block 1:
+ * 3 = MMC WP (write protect)
+ * 4 = MMC CD (card detect)
+ *
+ * Offsets on GPIO block 2:
+ * 0 = Up key
+ * 1 = Down key
+ * 2 = Left key
+ * 3 = Right key
+ * 4 = Key lower left
+ * 5 = Key lower right
+ */
+ /* We need the two MMCI GPIO entries */
+ lookup->table[0].chip_label = chipname;
+ lookup->table[0].chip_hwnum = 3;
+ lookup->table[0].con_id = "wp";
+ lookup->table[1].chip_label = chipname;
+ lookup->table[1].chip_hwnum = 4;
+ lookup->table[1].con_id = "cd";
+ lookup->table[1].flags = GPIO_ACTIVE_LOW;
+ gpiod_add_lookup_table(lookup);
+ }
+
d = amba_ahb_device_add_res(&dev->dev, devname, pc_base, SZ_4K,
irq1, irq2,
idev->platform_data, idev->id,
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