clk: mvebu: support for 98DX3236 SoC

The 98DX3236, 98DX3336, 98DX4521 and variants have a different TCLK from
the Armada XP (200MHz vs 250MHz). The CPU core clock is fixed at 800MHz.

The clock gating options are a subset of those on the Armada XP.

The core clock divider is different to the Armada XP also.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

diff --git a/Documentation/devicetree/bindings/clock/mvebu-corediv-clock.txt b/Documentation/devicetree/bindings/clock/mvebu-corediv-clock.txt
index 520562a..c7b4e3a 100644 (file)
--- a/Documentation/devicetree/bindings/clock/mvebu-corediv-clock.txt
+++ b/Documentation/devicetree/bindings/clock/mvebu-corediv-clock.txt
@@ -7,6 +7,7 @@ Required properties:
 - compatible : must be "marvell,armada-370-corediv-clock",
                       "marvell,armada-375-corediv-clock",
                       "marvell,armada-380-corediv-clock",
+                       "marvell,mv98dx3236-corediv-clock",
 
 - reg : must be the register address of Core Divider control register
 - #clock-cells : from common clock binding; shall be set to 1

diff --git a/Documentation/devicetree/bindings/clock/mvebu-cpu-clock.txt b/Documentation/devicetree/bindings/clock/mvebu-cpu-clock.txt
index 99c2146..7f28506 100644 (file)
--- a/Documentation/devicetree/bindings/clock/mvebu-cpu-clock.txt
+++ b/Documentation/devicetree/bindings/clock/mvebu-cpu-clock.txt
@@ -3,6 +3,7 @@ Device Tree Clock bindings for cpu clock of Marvell EBU platforms
 Required properties:
 - compatible : shall be one of the following:
        "marvell,armada-xp-cpu-clock" - cpu clocks for Armada XP
+       "marvell,mv98dx3236-cpu-clock" - cpu clocks for 98DX3236 SoC
 - reg : Address and length of the clock complex register set, followed
         by address and length of the PMU DFS registers
 - #clock-cells : should be set to 1.

diff --git a/drivers/clk/mvebu/armada-xp.c b/drivers/clk/mvebu/armada-xp.c
index b309431..890a863 100644 (file)
--- a/drivers/clk/mvebu/armada-xp.c
+++ b/drivers/clk/mvebu/armada-xp.c
@@ -52,6 +52,12 @@ static u32 __init axp_get_tclk_freq(void __iomem *sar)
        return 250000000;
 }
 
+/* MV98DX3236 TCLK frequency is fixed to 200MHz */
+static u32 __init mv98dx3236_get_tclk_freq(void __iomem *sar)
+{
+       return 200000000;
+}
+
 static const u32 axp_cpu_freqs[] __initconst = {
        1000000000,
        1066000000,
@@ -89,6 +95,12 @@ static u32 __init axp_get_cpu_freq(void __iomem *sar)
        return cpu_freq;
 }
 
+/* MV98DX3236 CLK frequency is fixed to 800MHz */
+static u32 __init mv98dx3236_get_cpu_freq(void __iomem *sar)
+{
+       return 800000000;
+}
+
 static const int axp_nbclk_ratios[32][2] __initconst = {
        {0, 1}, {1, 2}, {2, 2}, {2, 2},
        {1, 2}, {1, 2}, {1, 1}, {2, 3},
@@ -158,6 +170,11 @@ static const struct coreclk_soc_desc axp_coreclks = {
        .num_ratios = ARRAY_SIZE(axp_coreclk_ratios),
 };
 
+static const struct coreclk_soc_desc mv98dx3236_coreclks = {
+       .get_tclk_freq = mv98dx3236_get_tclk_freq,
+       .get_cpu_freq = mv98dx3236_get_cpu_freq,
+};
+
 /*
  * Clock Gating Control
  */
@@ -195,6 +212,15 @@ static const struct clk_gating_soc_desc axp_gating_desc[] __initconst = {
        { }
 };
 
+static const struct clk_gating_soc_desc mv98dx3236_gating_desc[] __initconst = {
+       { "ge1", NULL, 3, 0 },
+       { "ge0", NULL, 4, 0 },
+       { "pex00", NULL, 5, 0 },
+       { "sdio", NULL, 17, 0 },
+       { "xor0", NULL, 22, 0 },
+       { }
+};
+
 static void __init axp_clk_init(struct device_node *np)
 {
        struct device_node *cgnp =
@@ -206,3 +232,16 @@ static void __init axp_clk_init(struct device_node *np)
                mvebu_clk_gating_setup(cgnp, axp_gating_desc);
 }
 CLK_OF_DECLARE(axp_clk, "marvell,armada-xp-core-clock", axp_clk_init);
+
+static void __init mv98dx3236_clk_init(struct device_node *np)
+{
+       struct device_node *cgnp =
+               of_find_compatible_node(NULL, NULL, "marvell,armada-xp-gating-clock");
+
+       mvebu_coreclk_setup(np, &mv98dx3236_coreclks);
+
+       if (cgnp)
+               mvebu_clk_gating_setup(cgnp, mv98dx3236_gating_desc);
+}
+CLK_OF_DECLARE(mv98dx3236_clk, "marvell,mv98dx3236-core-clock",
+              mv98dx3236_clk_init);

diff --git a/drivers/clk/mvebu/clk-corediv.c b/drivers/clk/mvebu/clk-corediv.c
index d1e5863..8491979 100644 (file)
--- a/drivers/clk/mvebu/clk-corediv.c
+++ b/drivers/clk/mvebu/clk-corediv.c
@@ -71,6 +71,10 @@ static const struct clk_corediv_desc mvebu_corediv_desc[] = {
        { .mask = 0x3f, .offset = 8, .fieldbit = 1 }, /* NAND clock */
 };
 
+static const struct clk_corediv_desc mv98dx3236_corediv_desc[] = {
+       { .mask = 0x0f, .offset = 6, .fieldbit = 26 }, /* NAND clock */
+};
+
 #define to_corediv_clk(p) container_of(p, struct clk_corediv, hw)
 
 static int clk_corediv_is_enabled(struct clk_hw *hwclk)
@@ -232,6 +236,18 @@ static const struct clk_corediv_soc_desc armada375_corediv_soc = {
        .ratio_offset = 0x4,
 };
 
+static const struct clk_corediv_soc_desc mv98dx3236_corediv_soc = {
+       .descs = mv98dx3236_corediv_desc,
+       .ndescs = ARRAY_SIZE(mv98dx3236_corediv_desc),
+       .ops = {
+               .recalc_rate = clk_corediv_recalc_rate,
+               .round_rate = clk_corediv_round_rate,
+               .set_rate = clk_corediv_set_rate,
+       },
+       .ratio_reload = BIT(10),
+       .ratio_offset = 0x8,
+};
+
 static void __init
 mvebu_corediv_clk_init(struct device_node *node,
                       const struct clk_corediv_soc_desc *soc_desc)
@@ -313,3 +329,10 @@ static void __init armada380_corediv_clk_init(struct device_node *node)
 }
 CLK_OF_DECLARE(armada380_corediv_clk, "marvell,armada-380-corediv-clock",
               armada380_corediv_clk_init);
+
+static void __init mv98dx3236_corediv_clk_init(struct device_node *node)
+{
+       return mvebu_corediv_clk_init(node, &mv98dx3236_corediv_soc);
+}
+CLK_OF_DECLARE(mv98dx3236_corediv_clk, "marvell,mv98dx3236-corediv-clock",
+              mv98dx3236_corediv_clk_init);

diff --git a/drivers/clk/mvebu/clk-cpu.c b/drivers/clk/mvebu/clk-cpu.c
index 5837eb8..044892b 100644 (file)
--- a/drivers/clk/mvebu/clk-cpu.c
+++ b/drivers/clk/mvebu/clk-cpu.c
@@ -245,3 +245,11 @@ cpuclk_out:
 
 CLK_OF_DECLARE(armada_xp_cpu_clock, "marvell,armada-xp-cpu-clock",
                                         of_cpu_clk_setup);
+
+static void __init of_mv98dx3236_cpu_clk_setup(struct device_node *node)
+{
+       of_clk_add_provider(node, of_clk_src_simple_get, NULL);
+}
+
+CLK_OF_DECLARE(mv98dx3236_cpu_clock, "marvell,mv98dx3236-cpu-clock",
+                                        of_mv98dx3236_cpu_clk_setup);