ARM: dove: switch to DT clock providers

With true DT clock providers available switch Dove clock setup in DT-
enabled boards. While AUXDATA can be removed completely from bus probing,
some devices still don't know about DT at all. Therefore, some clock
aliases are created until the devices also move to DT.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

4 files changed, 71 insertions, 15 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ade7e924bef..05900997af9 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -533,6 +533,7 @@ config ARCH_IXP4XX
 config ARCH_DOVE
         bool "Marvell Dove"
         select ARCH_REQUIRE_GPIOLIB
+        select COMMON_CLK_DOVE
         select CPU_V7
         select GENERIC_CLOCKEVENTS
         select MIGHT_HAVE_PCI
diff --git a/arch/arm/boot/dts/dove.dtsi b/arch/arm/boot/dts/dove.dtsi
index 5a00022383e..b524ee377f8 100644
--- a/arch/arm/boot/dts/dove.dtsi
+++ b/arch/arm/boot/dts/dove.dtsi
@@ -31,6 +31,19 @@
                         reg = <0x20204 0x04>, <0x20214 0x04>;
                 };
 
+                core_clk: core-clocks@d0214 {
+                        compatible = "marvell,dove-core-clock";
+                        reg = <0xd0214 0x4>;
+                        #clock-cells = <1>;
+                };
+
+                gate_clk: clock-gating-control@d0038 {
+                        compatible = "marvell,dove-gating-clock";
+                        reg = <0xd0038 0x4>;
+                        clocks = <&core_clk 0>;
+                        #clock-cells = <1>;
+                };
+
                 uart0: serial@12000 {
                         compatible = "ns16550a";
                         reg = <0x12000 0x100>;
@@ -100,6 +113,7 @@
                         cell-index = <0>;
                         interrupts = <6>;
                         reg = <0x10600 0x28>;
+                        clocks = <&core_clk 0>;
                         status = "disabled";
                 };
 
@@ -110,6 +124,7 @@
                         cell-index = <1>;
                         interrupts = <5>;
                         reg = <0x14600 0x28>;
+                        clocks = <&core_clk 0>;
                         status = "disabled";
                 };
 
@@ -121,6 +136,7 @@
                         interrupts = <11>;
                         clock-frequency = <400000>;
                         timeout-ms = <1000>;
+                        clocks = <&core_clk 0>;
                         status = "disabled";
                 };
 
@@ -128,6 +144,7 @@
                         compatible = "marvell,dove-sdhci";
                         reg = <0x92000 0x100>;
                         interrupts = <35>, <37>;
+                        clocks = <&gate_clk 8>;
                         status = "disabled";
                 };
 
@@ -135,6 +152,7 @@
                         compatible = "marvell,dove-sdhci";
                         reg = <0x90000 0x100>;
                         interrupts = <36>, <38>;
+                        clocks = <&gate_clk 9>;
                         status = "disabled";
                 };
 
@@ -142,6 +160,7 @@
                         compatible = "marvell,orion-sata";
                         reg = <0xa0000 0x2400>;
                         interrupts = <62>;
+                        clocks = <&gate_clk 3>;
                         nr-ports = <1>;
                         status = "disabled";
                 };
@@ -152,6 +171,7 @@
                               <0xc8000000 0x800>;
                         reg-names = "regs", "sram";
                         interrupts = <31>;
+                        clocks = <&gate_clk 15>;
                         status = "okay";
                 };
         };
diff --git a/arch/arm/mach-dove/Kconfig b/arch/arm/mach-dove/Kconfig
index 00154e74ce6..603c5fd99e8 100644
--- a/arch/arm/mach-dove/Kconfig
+++ b/arch/arm/mach-dove/Kconfig
@@ -17,6 +17,8 @@ config MACH_CM_A510
 
 config MACH_DOVE_DT
         bool "Marvell Dove Flattened Device Tree"
+        select MVEBU_CLK_CORE
+        select MVEBU_CLK_GATING
         select USE_OF
         help
           Say 'Y' here if you want your kernel to support the
diff --git a/arch/arm/mach-dove/common.c b/arch/arm/mach-dove/common.c
index f723fe13d0f..6a2c4dc413a 100644
--- a/arch/arm/mach-dove/common.c
+++ b/arch/arm/mach-dove/common.c
@@ -14,6 +14,7 @@
 #include <linux/platform_device.h>
 #include <linux/pci.h>
 #include <linux/clk-provider.h>
+#include <linux/clk/mvebu.h>
 #include <linux/ata_platform.h>
 #include <linux/gpio.h>
 #include <linux/of.h>
@@ -376,19 +377,52 @@ void dove_restart(char mode, const char *cmd)
 
 #if defined(CONFIG_MACH_DOVE_DT)
 /*
- * Auxdata required until real OF clock provider
+ * There are still devices that doesn't even know about DT,
+ * get clock gates here and add a clock lookup.
  */
-struct of_dev_auxdata dove_auxdata_lookup[] __initdata = {
-        OF_DEV_AUXDATA("marvell,orion-spi", 0xf1010600, "orion_spi.0", NULL),
-        OF_DEV_AUXDATA("marvell,orion-spi", 0xf1014600, "orion_spi.1", NULL),
-        OF_DEV_AUXDATA("marvell,orion-wdt", 0xf1020300, "orion_wdt", NULL),
-        OF_DEV_AUXDATA("marvell,mv64xxx-i2c", 0xf1011000, "mv64xxx_i2c.0",
-                       NULL),
-        OF_DEV_AUXDATA("marvell,orion-sata", 0xf10a0000, "sata_mv.0", NULL),
-        OF_DEV_AUXDATA("marvell,dove-sdhci", 0xf1092000, "sdhci-dove.0", NULL),
-        OF_DEV_AUXDATA("marvell,dove-sdhci", 0xf1090000, "sdhci-dove.1", NULL),
-        {},
-};
+static void __init dove_legacy_clk_init(void)
+{
+        struct device_node *np = of_find_compatible_node(NULL, NULL,
+                                         "marvell,dove-gating-clock");
+        struct of_phandle_args clkspec;
+
+        clkspec.np = np;
+        clkspec.args_count = 1;
+
+        clkspec.args[0] = CLOCK_GATING_BIT_USB0;
+        orion_clkdev_add(NULL, "orion-ehci.0",
+                         of_clk_get_from_provider(&clkspec));
+
+        clkspec.args[0] = CLOCK_GATING_BIT_USB1;
+        orion_clkdev_add(NULL, "orion-ehci.1",
+                         of_clk_get_from_provider(&clkspec));
+
+        clkspec.args[0] = CLOCK_GATING_BIT_GBE;
+        orion_clkdev_add(NULL, "mv643xx_eth_port.0",
+                         of_clk_get_from_provider(&clkspec));
+
+        clkspec.args[0] = CLOCK_GATING_BIT_PCIE0;
+        orion_clkdev_add("0", "pcie",
+                         of_clk_get_from_provider(&clkspec));
+
+        clkspec.args[0] = CLOCK_GATING_BIT_PCIE1;
+        orion_clkdev_add("1", "pcie",
+                         of_clk_get_from_provider(&clkspec));
+
+        clkspec.args[0] = CLOCK_GATING_BIT_XOR0;
+        orion_clkdev_add(NULL, "mv_xor_shared.0",
+                         of_clk_get_from_provider(&clkspec));
+
+        clkspec.args[0] = CLOCK_GATING_BIT_XOR1;
+        orion_clkdev_add(NULL, "mv_xor_shared.1",
+                         of_clk_get_from_provider(&clkspec));
+}
+
+static void __init dove_of_clk_init(void)
+{
+        mvebu_clocks_init();
+        dove_legacy_clk_init();
+}
 
 static struct mv643xx_eth_platform_data dove_dt_ge00_data = {
         .phy_addr = MV643XX_ETH_PHY_ADDR_DEFAULT,
@@ -405,7 +439,7 @@ static void __init dove_dt_init(void)
         dove_setup_cpu_mbus();
 
         /* Setup root of clk tree */
-        dove_clk_init();
+        dove_of_clk_init();
 
         /* Internal devices not ported to DT yet */
         dove_rtc_init();
@@ -417,8 +451,7 @@ static void __init dove_dt_init(void)
         dove_ehci1_init();
         dove_pcie_init(1, 1);
 
-        of_platform_populate(NULL, of_default_bus_match_table,
-                             dove_auxdata_lookup, NULL);
+        of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 }
 
 static const char * const dove_dt_board_compat[] = {