brcm63xx: register SPI controllers through DT

Register SPI controllers through device tree. We will wire up the clocks
at a later stage.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

1 files changed, 54 insertions, 13 deletions

diff --git a/target/linux/brcm63xx/patches-4.4/411-MIPS-BCM63XX-Register-SPI-flash-if-present.patch b/target/linux/brcm63xx/patches-4.4/411-MIPS-BCM63XX-Register-SPI-flash-if-present.patch
index 1b844fd7d5..9dfa834b20 100644
--- a/target/linux/brcm63xx/patches-4.4/411-MIPS-BCM63XX-Register-SPI-flash-if-present.patch
+++ b/target/linux/brcm63xx/patches-4.4/411-MIPS-BCM63XX-Register-SPI-flash-if-present.patch
@@ -11,10 +11,11 @@ Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
 
 --- a/arch/mips/bcm63xx/dev-flash.c
 +++ b/arch/mips/bcm63xx/dev-flash.c
-@@ -17,9 +17,12 @@
+@@ -17,9 +17,13 @@
  #include <linux/mtd/partitions.h>
  #include <linux/mtd/physmap.h>
  #include <linux/mtd/spi-nor.h>
++#include <linux/of.h>
 +#include <linux/spi/spi.h>
 +#include <linux/spi/flash.h>
  
@@ -24,7 +25,7 @@ Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
  #include <bcm63xx_regs.h>
  #include <bcm63xx_io.h>
  
-@@ -66,6 +69,21 @@ void __init bcm63xx_flash_force_phys_bas
+@@ -66,6 +70,46 @@ void __init bcm63xx_flash_force_phys_bas
  	mtd_resources[0].end = end;
  }
  
@@ -43,10 +44,35 @@ Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
 +	},
 +};
 +
++static void bcm63xx_of_update_spi_flash_speed(struct device_node *np,
++					       unsigned int new_hz)
++{
++	struct property *max_hz;
++	__be32 *hz;
++
++	max_hz = kzalloc(sizeof(*max_hz) + sizeof(*hz), GFP_KERNEL);
++	if (!max_hz)
++		return;
++
++	max_hz->name = kstrdup("spi-max-frequency", GFP_KERNEL);
++	if (!max_hz->name) {
++		kfree(max_hz);
++		return;
++	}
++
++	max_hz->value = max_hz + 1;
++	max_hz->length = sizeof(*hz);
++
++	hz = max_hz->value;
++	*hz = cpu_to_be32(new_hz);
++
++	of_update_property(np, max_hz);
++}
++
  static int __init bcm63xx_detect_flash_type(void)
  {
  	u32 val;
-@@ -73,9 +91,15 @@ static int __init bcm63xx_detect_flash_t
+@@ -73,9 +117,15 @@ static int __init bcm63xx_detect_flash_t
  	switch (bcm63xx_get_cpu_id()) {
  	case BCM6318_CPU_ID:
  		/* only support serial flash */
@@ -62,7 +88,7 @@ Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
  		if (val & STRAPBUS_6328_BOOT_SEL_SERIAL)
  			return BCM63XX_FLASH_TYPE_SERIAL;
  		else
-@@ -94,12 +118,20 @@ static int __init bcm63xx_detect_flash_t
+@@ -94,12 +144,20 @@ static int __init bcm63xx_detect_flash_t
  			return BCM63XX_FLASH_TYPE_SERIAL;
  	case BCM6362_CPU_ID:
  		val = bcm_misc_readl(MISC_STRAPBUS_6362_REG);
@@ -83,7 +109,7 @@ Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
  		switch (val & STRAPBUS_6368_BOOT_SEL_MASK) {
  		case STRAPBUS_6368_BOOT_SEL_NAND:
  			return BCM63XX_FLASH_TYPE_NAND;
-@@ -110,6 +142,11 @@ static int __init bcm63xx_detect_flash_t
+@@ -110,6 +168,11 @@ static int __init bcm63xx_detect_flash_t
  		}
  	case BCM63268_CPU_ID:
  		val = bcm_misc_readl(MISC_STRAPBUS_63268_REG);
@@ -95,20 +121,35 @@ Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
  		if (val & STRAPBUS_63268_BOOT_SEL_SERIAL)
  			return BCM63XX_FLASH_TYPE_SERIAL;
  		else
-@@ -195,8 +232,14 @@ int __init bcm63xx_flash_register(void)
+@@ -176,6 +239,7 @@ void __init bcm63xx_flash_detect(void)
+ 
+ int __init bcm63xx_flash_register(void)
+ {
++	struct device_node *np;
+ 	u32 val;
+ 
+ 	switch (flash_type) {
+@@ -195,8 +259,21 @@ int __init bcm63xx_flash_register(void)
  
  		return platform_device_register(&mtd_dev);
  	case BCM63XX_FLASH_TYPE_SERIAL:
 -		pr_warn("unsupported serial flash detected\n");
 -		return -ENODEV;
-+		if (BCMCPU_IS_6318() || BCMCPU_IS_6328() || BCMCPU_IS_6362() ||
-+		    BCMCPU_IS_63268()) {
-+			bcm63xx_spi_flash_info[0].bus_num = 1;
-+			bcm63xx_spi_flash_info[0].mode = SPI_RX_DUAL;
-+		}
++		np = of_find_compatible_node(NULL, NULL, "jedec,spi-nor");
++		if (np) {
++			bcm63xx_of_update_spi_flash_speed(np, bcm63xx_spi_flash_info[0].max_speed_hz);
++			of_node_put(np);
++			return 0;
++		} else {
++			if (BCMCPU_IS_6318() || BCMCPU_IS_6328() ||
++			    BCMCPU_IS_6362() || BCMCPU_IS_63268()) {
++				bcm63xx_spi_flash_info[0].bus_num = 1;
++				bcm63xx_spi_flash_info[0].mode = SPI_RX_DUAL;
++			}
 +
-+		return spi_register_board_info(bcm63xx_spi_flash_info,
-+					ARRAY_SIZE(bcm63xx_spi_flash_info));
++			return spi_register_board_info(bcm63xx_spi_flash_info,
++						ARRAY_SIZE(bcm63xx_spi_flash_info));
++		}
  	case BCM63XX_FLASH_TYPE_NAND:
  		pr_warn("unsupported NAND flash detected\n");
  		return -ENODEV;