13 files changed, 123 insertions, 3 deletions

diff --git a/Documentation/devicetree/bindings/misc/atmel-ssc.txt b/Documentation/devicetree/bindings/misc/atmel-ssc.txt
new file mode 100644
index 000000000000..38e51ad2e07e
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/atmel-ssc.txt
@@ -0,0 +1,15 @@
+* Atmel SSC driver.
+
+Required properties:
+- compatible: "atmel,at91rm9200-ssc" or "atmel,at91sam9g45-ssc"
+        - atmel,at91rm9200-ssc: support pdc transfer
+        - atmel,at91sam9g45-ssc: support dma transfer
+- reg: Should contain SSC registers location and length
+- interrupts: Should contain SSC interrupt
+
+Example:
+ssc0: ssc@fffbc000 {
+        compatible = "atmel,at91rm9200-ssc";
+        reg = <0xfffbc000 0x4000>;
+        interrupts = <14 4 5>;
+};
diff --git a/arch/arm/boot/dts/at91sam9260.dtsi b/arch/arm/boot/dts/at91sam9260.dtsi
index d410581a5a85..aaa42d8d4f88 100644
--- a/arch/arm/boot/dts/at91sam9260.dtsi
+++ b/arch/arm/boot/dts/at91sam9260.dtsi
@@ -29,6 +29,7 @@
                 tcb0 = &tcb0;
                 tcb1 = &tcb1;
                 i2c0 = &i2c0;
+                ssc0 = &ssc0;
         };
         cpus {
                 cpu@0 {
@@ -212,6 +213,13 @@
                                 status = "disabled";
                         };
 
+                        ssc0: ssc@fffbc000 {
+                                compatible = "atmel,at91rm9200-ssc";
+                                reg = <0xfffbc000 0x4000>;
+                                interrupts = <14 4 5>;
+                                status = "disable";
+                        };
+
                         adc0: adc@fffe0000 {
                                 compatible = "atmel,at91sam9260-adc";
                                 reg = <0xfffe0000 0x100>;
diff --git a/arch/arm/boot/dts/at91sam9263.dtsi b/arch/arm/boot/dts/at91sam9263.dtsi
index 3e6e5c1abbf3..3b721ee59b10 100644
--- a/arch/arm/boot/dts/at91sam9263.dtsi
+++ b/arch/arm/boot/dts/at91sam9263.dtsi
@@ -25,6 +25,8 @@
                 gpio4 = &pioE;
                 tcb0 = &tcb0;
                 i2c0 = &i2c0;
+                ssc0 = &ssc0;
+                ssc1 = &ssc1;
         };
         cpus {
                 cpu@0 {
@@ -173,6 +175,20 @@
                                 status = "disabled";
                         };
 
+                        ssc0: ssc@fff98000 {
+                                compatible = "atmel,at91rm9200-ssc";
+                                reg = <0xfff98000 0x4000>;
+                                interrupts = <16 4 5>;
+                                status = "disable";
+                        };
+
+                        ssc1: ssc@fff9c000 {
+                                compatible = "atmel,at91rm9200-ssc";
+                                reg = <0xfff9c000 0x4000>;
+                                interrupts = <17 4 5>;
+                                status = "disable";
+                        };
+
                         macb0: ethernet@fffbc000 {
                                 compatible = "cdns,at32ap7000-macb", "cdns,macb";
                                 reg = <0xfffbc000 0x100>;
diff --git a/arch/arm/boot/dts/at91sam9g45.dtsi b/arch/arm/boot/dts/at91sam9g45.dtsi
index 3add030d61f8..acfa207162ff 100644
--- a/arch/arm/boot/dts/at91sam9g45.dtsi
+++ b/arch/arm/boot/dts/at91sam9g45.dtsi
@@ -31,6 +31,8 @@
                 tcb1 = &tcb1;
                 i2c0 = &i2c0;
                 i2c1 = &i2c1;
+                ssc0 = &ssc0;
+                ssc1 = &ssc1;
         };
         cpus {
                 cpu@0 {
@@ -226,6 +228,20 @@
                                 status = "disabled";
                         };
 
+                        ssc0: ssc@fff9c000 {
+                                compatible = "atmel,at91sam9g45-ssc";
+                                reg = <0xfff9c000 0x4000>;
+                                interrupts = <16 4 5>;
+                                status = "disable";
+                        };
+
+                        ssc1: ssc@fffa0000 {
+                                compatible = "atmel,at91sam9g45-ssc";
+                                reg = <0xfffa0000 0x4000>;
+                                interrupts = <17 4 5>;
+                                status = "disable";
+                        };
+
                         adc0: adc@fffb0000 {
                                 compatible = "atmel,at91sam9260-adc";
                                 reg = <0xfffb0000 0x100>;
diff --git a/arch/arm/boot/dts/at91sam9x5.dtsi b/arch/arm/boot/dts/at91sam9x5.dtsi
index 03fc136421c5..69667d0ac347 100644
--- a/arch/arm/boot/dts/at91sam9x5.dtsi
+++ b/arch/arm/boot/dts/at91sam9x5.dtsi
@@ -30,6 +30,7 @@
                 i2c0 = &i2c0;
                 i2c1 = &i2c1;
                 i2c2 = &i2c2;
+                ssc0 = &ssc0;
         };
         cpus {
                 cpu@0 {
@@ -87,6 +88,13 @@
                                 interrupts = <1 4 7>;
                         };
 
+                        ssc0: ssc@f0010000 {
+                                compatible = "atmel,at91sam9g45-ssc";
+                                reg = <0xf0010000 0x4000>;
+                                interrupts = <28 4 5>;
+                                status = "disable";
+                        };
+
                         tcb0: timer@f8008000 {
                                 compatible = "atmel,at91sam9x5-tcb";
                                 reg = <0xf8008000 0x100>;
diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c
index 400d1a34683c..af47c75db513 100644
--- a/arch/arm/mach-at91/at91rm9200.c
+++ b/arch/arm/mach-at91/at91rm9200.c
@@ -187,6 +187,9 @@ static struct clk_lookup periph_clocks_lookups[] = {
         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk),
         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk),
         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.2", &ssc2_clk),
+        CLKDEV_CON_DEV_ID("pclk", "fffd0000.ssc", &ssc0_clk),
+        CLKDEV_CON_DEV_ID("pclk", "fffd4000.ssc", &ssc1_clk),
+        CLKDEV_CON_DEV_ID("pclk", "fffd8000.ssc", &ssc2_clk),
         CLKDEV_CON_DEV_ID(NULL, "i2c-at91rm9200.0", &twi_clk),
         /* fake hclk clock */
         CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &ohci_clk),
diff --git a/arch/arm/mach-at91/at91sam9260.c b/arch/arm/mach-at91/at91sam9260.c
index d14ab6aea250..a41eb3d23f68 100644
--- a/arch/arm/mach-at91/at91sam9260.c
+++ b/arch/arm/mach-at91/at91sam9260.c
@@ -211,6 +211,7 @@ static struct clk_lookup periph_clocks_lookups[] = {
         CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.1", &tc4_clk),
         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.1", &tc5_clk),
         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc_clk),
+        CLKDEV_CON_DEV_ID("pclk", "fffbc000.ssc", &ssc_clk),
         CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9260.0", &twi_clk),
         CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g20.0", &twi_clk),
         /* more usart lookup table for DT entries */
diff --git a/arch/arm/mach-at91/at91sam9261.c b/arch/arm/mach-at91/at91sam9261.c
index c7b605796dd4..7fcbe0583342 100644
--- a/arch/arm/mach-at91/at91sam9261.c
+++ b/arch/arm/mach-at91/at91sam9261.c
@@ -177,6 +177,9 @@ static struct clk_lookup periph_clocks_lookups[] = {
         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk),
         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk),
         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.2", &ssc2_clk),
+        CLKDEV_CON_DEV_ID("pclk", "fffbc000.ssc", &ssc0_clk),
+        CLKDEV_CON_DEV_ID("pclk", "fffc0000.ssc", &ssc1_clk),
+        CLKDEV_CON_DEV_ID("pclk", "fffc4000.ssc", &ssc2_clk),
         CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &hck0),
         CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9261.0", &twi_clk),
         CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g10.0", &twi_clk),
diff --git a/arch/arm/mach-at91/at91sam9263.c b/arch/arm/mach-at91/at91sam9263.c
index b87be18f08ae..c0f4c8c1f4ed 100644
--- a/arch/arm/mach-at91/at91sam9263.c
+++ b/arch/arm/mach-at91/at91sam9263.c
@@ -188,6 +188,8 @@ static struct clk_lookup periph_clocks_lookups[] = {
         CLKDEV_CON_ID("hclk", &macb_clk),
         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk),
         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk),
+        CLKDEV_CON_DEV_ID("pclk", "fff98000.ssc", &ssc0_clk),
+        CLKDEV_CON_DEV_ID("pclk", "fff9c000.ssc", &ssc1_clk),
         CLKDEV_CON_DEV_ID("mci_clk", "atmel_mci.0", &mmc0_clk),
         CLKDEV_CON_DEV_ID("mci_clk", "atmel_mci.1", &mmc1_clk),
         CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.0", &spi0_clk),
diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c
index f4f96a61e4b8..a4282d3742bf 100644
--- a/arch/arm/mach-at91/at91sam9g45.c
+++ b/arch/arm/mach-at91/at91sam9g45.c
@@ -241,6 +241,8 @@ static struct clk_lookup periph_clocks_lookups[] = {
         CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g10.1", &twi1_clk),
         CLKDEV_CON_DEV_ID("pclk", "at91sam9g45_ssc.0", &ssc0_clk),
         CLKDEV_CON_DEV_ID("pclk", "at91sam9g45_ssc.1", &ssc1_clk),
+        CLKDEV_CON_DEV_ID("pclk", "fff9c000.ssc", &ssc0_clk),
+        CLKDEV_CON_DEV_ID("pclk", "fffa0000.ssc", &ssc1_clk),
         CLKDEV_CON_DEV_ID(NULL, "atmel-trng", &trng_clk),
         CLKDEV_CON_DEV_ID(NULL, "atmel_sha", &aestdessha_clk),
         CLKDEV_CON_DEV_ID(NULL, "atmel_tdes", &aestdessha_clk),
diff --git a/arch/arm/mach-at91/at91sam9rl.c b/arch/arm/mach-at91/at91sam9rl.c
index 4110b5480d49..b683fdc699f1 100644
--- a/arch/arm/mach-at91/at91sam9rl.c
+++ b/arch/arm/mach-at91/at91sam9rl.c
@@ -186,6 +186,8 @@ static struct clk_lookup periph_clocks_lookups[] = {
         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk),
         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk),
         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk),
+        CLKDEV_CON_DEV_ID("pclk", "fffc0000.ssc", &ssc0_clk),
+        CLKDEV_CON_DEV_ID("pclk", "fffc4000.ssc", &ssc1_clk),
         CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g20.0", &twi0_clk),
         CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g20.1", &twi1_clk),
         CLKDEV_CON_ID("pioA", &pioA_clk),
diff --git a/arch/arm/mach-at91/at91sam9x5.c b/arch/arm/mach-at91/at91sam9x5.c
index e5035380dcbc..18fbbb27f97f 100644
--- a/arch/arm/mach-at91/at91sam9x5.c
+++ b/arch/arm/mach-at91/at91sam9x5.c
@@ -231,6 +231,7 @@ static struct clk_lookup periph_clocks_lookups[] = {
         CLKDEV_CON_DEV_ID("t0_clk", "f800c000.timer", &tcb0_clk),
         CLKDEV_CON_DEV_ID("dma_clk", "ffffec00.dma-controller", &dma0_clk),
         CLKDEV_CON_DEV_ID("dma_clk", "ffffee00.dma-controller", &dma1_clk),
+        CLKDEV_CON_DEV_ID("pclk", "f0010000.ssc", &ssc_clk),
         CLKDEV_CON_DEV_ID(NULL, "f8010000.i2c", &twi0_clk),
         CLKDEV_CON_DEV_ID(NULL, "f8014000.i2c", &twi1_clk),
         CLKDEV_CON_DEV_ID(NULL, "f8018000.i2c", &twi2_clk),
diff --git a/drivers/misc/atmel-ssc.c b/drivers/misc/atmel-ssc.c
index f40abd8a6695..a769719e36bf 100644
--- a/drivers/misc/atmel-ssc.c
+++ b/drivers/misc/atmel-ssc.c
@@ -18,6 +18,8 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 
+#include <linux/of.h>
+
 /* Serialize access to ssc_list and user count */
 static DEFINE_SPINLOCK(user_lock);
 static LIST_HEAD(ssc_list);
@@ -29,7 +31,13 @@ struct ssc_device *ssc_request(unsigned int ssc_num)
 
         spin_lock(&user_lock);
         list_for_each_entry(ssc, &ssc_list, list) {
-                if (ssc->pdev->id == ssc_num) {
+                if (ssc->pdev->dev.of_node) {
+                        if (of_alias_get_id(ssc->pdev->dev.of_node, "ssc")
+                                == ssc_num) {
+                                ssc_valid = 1;
+                                break;
+                        }
+                } else if (ssc->pdev->id == ssc_num) {
                         ssc_valid = 1;
                         break;
                 }
@@ -88,10 +96,41 @@ static const struct platform_device_id atmel_ssc_devtypes[] = {
         }
 };
 
+#ifdef CONFIG_OF
+static const struct of_device_id atmel_ssc_dt_ids[] = {
+        {
+                .compatible = "atmel,at91rm9200-ssc",
+                .data = &at91rm9200_config,
+        }, {
+                .compatible = "atmel,at91sam9g45-ssc",
+                .data = &at91sam9g45_config,
+        }, {
+                /* sentinel */
+        }
+};
+MODULE_DEVICE_TABLE(of, atmel_ssc_dt_ids);
+#endif
+
+static inline const struct atmel_ssc_platform_data * __init
+        atmel_ssc_get_driver_data(struct platform_device *pdev)
+{
+        if (pdev->dev.of_node) {
+                const struct of_device_id *match;
+                match = of_match_node(atmel_ssc_dt_ids, pdev->dev.of_node);
+                if (match == NULL)
+                        return NULL;
+                return match->data;
+        }
+
+        return (struct atmel_ssc_platform_data *)
+                platform_get_device_id(pdev)->driver_data;
+}
+
 static int ssc_probe(struct platform_device *pdev)
 {
         struct resource *regs;
         struct ssc_device *ssc;
+        const struct atmel_ssc_platform_data *plat_dat;
 
         ssc = devm_kzalloc(&pdev->dev, sizeof(struct ssc_device), GFP_KERNEL);
         if (!ssc) {
@@ -100,8 +139,11 @@ static int ssc_probe(struct platform_device *pdev)
         }
 
         ssc->pdev = pdev;
-        ssc->pdata = (struct atmel_ssc_platform_data *)
-                        platform_get_device_id(pdev)->driver_data;
+
+        plat_dat = atmel_ssc_get_driver_data(pdev);
+        if (!plat_dat)
+                return -ENODEV;
+        ssc->pdata = (struct atmel_ssc_platform_data *)plat_dat;
 
         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!regs) {
@@ -160,6 +202,7 @@ static struct platform_driver ssc_driver = {
         .driver         = {
                 .name           = "ssc",
                 .owner          = THIS_MODULE,
+                .of_match_table = of_match_ptr(atmel_ssc_dt_ids),
         },
         .id_table       = atmel_ssc_devtypes,
         .probe          = ssc_probe,