clk: mvebu: armada 370/XP add clock gating control provider for DT

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

2 files changed, 116 insertions, 1 deletions

diff --git a/Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt b/Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt
index 4ad8ccd15e67..7337005ef5e1 100644
--- a/Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt
+++ b/Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt
@@ -6,6 +6,49 @@ the clock ID in its "clocks" phandle cell. The clock ID is directly mapped to
 the corresponding clock gating control bit in HW to ease manual clock lookup
 in datasheet.
 
+The following is a list of provided IDs for Armada 370:
+ID      Clock   Peripheral
+-----------------------------------
+0       Audio   AC97 Cntrl
+1       pex0_en PCIe 0 Clock out
+2       pex1_en PCIe 1 Clock out
+3       ge1     Gigabit Ethernet 1
+4       ge0     Gigabit Ethernet 0
+5       pex0    PCIe Cntrl 0
+9       pex1    PCIe Cntrl 1
+15      sata0   SATA Host 0
+17      sdio    SDHCI Host
+25      tdm     Time Division Mplx
+28      ddr     DDR Cntrl
+30      sata1   SATA Host 0
+
+The following is a list of provided IDs for Armada XP:
+ID      Clock   Peripheral
+-----------------------------------
+0       audio   Audio Cntrl
+1       ge3     Gigabit Ethernet 3
+2       ge2     Gigabit Ethernet 2
+3       ge1     Gigabit Ethernet 1
+4       ge0     Gigabit Ethernet 0
+5       pex0    PCIe Cntrl 0
+6       pex1    PCIe Cntrl 1
+7       pex2    PCIe Cntrl 2
+8       pex3    PCIe Cntrl 3
+13      bp
+14      sata0lnk
+15      sata0   SATA Host 0
+16      lcd     LCD Cntrl
+17      sdio    SDHCI Host
+18      usb0    USB Host 0
+19      usb1    USB Host 1
+20      usb2    USB Host 2
+22      xor0    XOR DMA 0
+23      crypto  CESA engine
+25      tdm     Time Division Mplx
+28      xor1    XOR DMA 1
+29      sata1lnk
+30      sata1   SATA Host 0
+
 The following is a list of provided IDs for Dove:
 ID      Clock   Peripheral
 -----------------------------------
diff --git a/drivers/clk/mvebu/clk-gating-ctrl.c b/drivers/clk/mvebu/clk-gating-ctrl.c
index fa69f87c5797..c6d3c263b070 100644
--- a/drivers/clk/mvebu/clk-gating-ctrl.c
+++ b/drivers/clk/mvebu/clk-gating-ctrl.c
@@ -88,10 +88,21 @@ static void __init mvebu_clk_gating_setup(
         }
 
         for (n = 0; n < ctrl->num_gates; n++) {
+                u8 flags = 0;
                 const char *parent =
                         (descr[n].parent) ? descr[n].parent : default_parent;
+
+                /*
+                 * On Armada 370, the DDR clock is a special case: it
+                 * isn't taken by any driver, but should anyway be
+                 * kept enabled, so we mark it as IGNORE_UNUSED for
+                 * now.
+                 */
+                if (!strcmp(descr[n].name, "ddr"))
+                        flags |= CLK_IGNORE_UNUSED;
+
                 ctrl->gates[n] = clk_register_gate(NULL, descr[n].name, parent,
-                                   0, base, descr[n].bit_idx, 0, &ctrl->lock);
+                                   flags, base, descr[n].bit_idx, 0, &ctrl->lock);
                 WARN_ON(IS_ERR(ctrl->gates[n]));
         }
         of_clk_add_provider(np, mvebu_clk_gating_get_src, ctrl);
@@ -101,6 +112,53 @@ static void __init mvebu_clk_gating_setup(
  * SoC specific clock gating control
  */
 
+#ifdef CONFIG_MACH_ARMADA_370
+static const struct mvebu_soc_descr __initconst armada_370_gating_descr[] = {
+        { "audio", NULL, 0 },
+        { "pex0_en", NULL, 1 },
+        { "pex1_en", NULL,  2 },
+        { "ge1", NULL, 3 },
+        { "ge0", NULL, 4 },
+        { "pex0", NULL, 5 },
+        { "pex1", NULL, 9 },
+        { "sata0", NULL, 15 },
+        { "sdio", NULL, 17 },
+        { "tdm", NULL, 25 },
+        { "ddr", NULL, 28 },
+        { "sata1", NULL, 30 },
+        { }
+};
+#endif
+
+#ifdef CONFIG_MACH_ARMADA_XP
+static const struct mvebu_soc_descr __initconst armada_xp_gating_descr[] = {
+        { "audio", NULL, 0 },
+        { "ge3", NULL, 1 },
+        { "ge2", NULL,  2 },
+        { "ge1", NULL, 3 },
+        { "ge0", NULL, 4 },
+        { "pex0", NULL, 5 },
+        { "pex1", NULL, 6 },
+        { "pex2", NULL, 7 },
+        { "pex3", NULL, 8 },
+        { "bp", NULL, 13 },
+        { "sata0lnk", NULL, 14 },
+        { "sata0", "sata0lnk", 15 },
+        { "lcd", NULL, 16 },
+        { "sdio", NULL, 17 },
+        { "usb0", NULL, 18 },
+        { "usb1", NULL, 19 },
+        { "usb2", NULL, 20 },
+        { "xor0", NULL, 22 },
+        { "crypto", NULL, 23 },
+        { "tdm", NULL, 25 },
+        { "xor1", NULL, 28 },
+        { "sata1lnk", NULL, 29 },
+        { "sata1", "sata1lnk", 30 },
+        { }
+};
+#endif
+
 #ifdef CONFIG_ARCH_DOVE
 static const struct mvebu_soc_descr __initconst dove_gating_descr[] = {
         { "usb0", NULL, 0 },
@@ -147,6 +205,20 @@ static const struct mvebu_soc_descr __initconst kirkwood_gating_descr[] = {
 #endif
 
 static const __initdata struct of_device_id clk_gating_match[] = {
+#ifdef CONFIG_MACH_ARMADA_370
+        {
+                .compatible = "marvell,armada-370-gating-clock",
+                .data = armada_370_gating_descr,
+        },
+#endif
+
+#ifdef CONFIG_MACH_ARMADA_XP
+        {
+                .compatible = "marvell,armada-xp-gating-clock",
+                .data = armada_xp_gating_descr,
+        },
+#endif
+
 #ifdef CONFIG_ARCH_DOVE
         {
                 .compatible = "marvell,dove-gating-clock",