ARM: at91: add Atmel ISI and ov2640 support on sam9m10g45 board

This patch adds:
- ov2640 sensor in at91sam9m10g45ek board
- support to use PCK as ISI_MCK. PCK's parent is managed at
  SoC level, e.g. at91sam9g45_devices.c

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 94 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index 96e2adcd5a84..bd4e68cd3e2f 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -14,6 +14,7 @@
 
 #include <linux/dma-mapping.h>
 #include <linux/gpio.h>
+#include <linux/clk.h>
 #include <linux/platform_device.h>
 #include <linux/i2c-gpio.h>
 #include <linux/atmel-mci.h>
@@ -28,7 +29,10 @@
 #include <mach/at_hdmac.h>
 #include <mach/atmel-mci.h>
 
+#include <media/atmel-isi.h>
+
 #include "generic.h"
+#include "clock.h"
 
 
 /* --------------------------------------------------------------------
@@ -870,6 +874,96 @@ void __init at91_add_device_ac97(struct ac97c_platform_data *data)
 void __init at91_add_device_ac97(struct ac97c_platform_data *data) {}
 #endif
 
+/* --------------------------------------------------------------------
+ *  Image Sensor Interface
+ * -------------------------------------------------------------------- */
+#if defined(CONFIG_VIDEO_ATMEL_ISI) || defined(CONFIG_VIDEO_ATMEL_ISI_MODULE)
+static u64 isi_dmamask = DMA_BIT_MASK(32);
+static struct isi_platform_data isi_data;
+
+struct resource isi_resources[] = {
+        [0] = {
+                .start  = AT91SAM9G45_BASE_ISI,
+                .end    = AT91SAM9G45_BASE_ISI + SZ_16K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = AT91SAM9G45_ID_ISI,
+                .end    = AT91SAM9G45_ID_ISI,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device at91sam9g45_isi_device = {
+        .name           = "atmel_isi",
+        .id             = 0,
+        .dev            = {
+                        .dma_mask               = &isi_dmamask,
+                        .coherent_dma_mask      = DMA_BIT_MASK(32),
+                        .platform_data          = &isi_data,
+        },
+        .resource       = isi_resources,
+        .num_resources  = ARRAY_SIZE(isi_resources),
+};
+
+static struct clk_lookup isi_mck_lookups[] = {
+        CLKDEV_CON_DEV_ID("isi_mck", "atmel_isi.0", NULL),
+};
+
+void __init at91_add_device_isi(struct isi_platform_data *data,
+                bool use_pck_as_mck)
+{
+        struct clk *pck;
+        struct clk *parent;
+
+        if (!data)
+                return;
+        isi_data = *data;
+
+        at91_set_A_periph(AT91_PIN_PB20, 0);    /* ISI_D0 */
+        at91_set_A_periph(AT91_PIN_PB21, 0);    /* ISI_D1 */
+        at91_set_A_periph(AT91_PIN_PB22, 0);    /* ISI_D2 */
+        at91_set_A_periph(AT91_PIN_PB23, 0);    /* ISI_D3 */
+        at91_set_A_periph(AT91_PIN_PB24, 0);    /* ISI_D4 */
+        at91_set_A_periph(AT91_PIN_PB25, 0);    /* ISI_D5 */
+        at91_set_A_periph(AT91_PIN_PB26, 0);    /* ISI_D6 */
+        at91_set_A_periph(AT91_PIN_PB27, 0);    /* ISI_D7 */
+        at91_set_A_periph(AT91_PIN_PB28, 0);    /* ISI_PCK */
+        at91_set_A_periph(AT91_PIN_PB30, 0);    /* ISI_HSYNC */
+        at91_set_A_periph(AT91_PIN_PB29, 0);    /* ISI_VSYNC */
+        at91_set_B_periph(AT91_PIN_PB8, 0);     /* ISI_PD8 */
+        at91_set_B_periph(AT91_PIN_PB9, 0);     /* ISI_PD9 */
+        at91_set_B_periph(AT91_PIN_PB10, 0);    /* ISI_PD10 */
+        at91_set_B_periph(AT91_PIN_PB11, 0);    /* ISI_PD11 */
+
+        platform_device_register(&at91sam9g45_isi_device);
+
+        if (use_pck_as_mck) {
+                at91_set_B_periph(AT91_PIN_PB31, 0);    /* ISI_MCK (PCK1) */
+
+                pck = clk_get(NULL, "pck1");
+                parent = clk_get(NULL, "plla");
+
+                BUG_ON(IS_ERR(pck) || IS_ERR(parent));
+
+                if (clk_set_parent(pck, parent)) {
+                        pr_err("Failed to set PCK's parent\n");
+                } else {
+                        /* Register PCK as ISI_MCK */
+                        isi_mck_lookups[0].clk = pck;
+                        clkdev_add_table(isi_mck_lookups,
+                                        ARRAY_SIZE(isi_mck_lookups));
+                }
+
+                clk_put(pck);
+                clk_put(parent);
+        }
+}
+#else
+void __init at91_add_device_isi(struct isi_platform_data *data,
+                bool use_pck_as_mck) {}
+#endif
+
 
 /* --------------------------------------------------------------------
  *  LCD Controller