[PATCHv3 1/5] clk: mvebu: support for 98DX3236 SoC
From: Chris Packham
Date: Thu Jan 05 2017 - 23:17:20 EST
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@xxxxxxxxxxxxxxxxxxx>
---
Changes in v2:
- Update devicetree binding documentation for new compatible string
Changes in v3:
- Add 98dx3236 support to mvebu/clk-corediv.c rather than creating a new
driver.
- Document mv98dx3236-corediv-clock binding
.../bindings/clock/mvebu-corediv-clock.txt | 1 +
.../devicetree/bindings/clock/mvebu-cpu-clock.txt | 1 +
drivers/clk/mvebu/armada-xp.c | 42 ++++++++++++++++++++++
drivers/clk/mvebu/clk-corediv.c | 23 ++++++++++++
drivers/clk/mvebu/clk-cpu.c | 31 ++++++++++++++--
5 files changed, 96 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/clock/mvebu-corediv-clock.txt b/Documentation/devicetree/bindings/clock/mvebu-corediv-clock.txt
index 520562a7dc2a..c7b4e3a6b2c6 100644
--- 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 99c214660bdc..7f28506eaee7 100644
--- 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 b3094315a3c0..0413bf8284e0 100644
--- 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 +170,14 @@ 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,
+ .get_clk_ratio = NULL,
+ .ratios = NULL,
+ .num_ratios = 0,
+};
+
/*
* Clock Gating Control
*/
@@ -195,6 +215,15 @@ 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 +235,16 @@ 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 d1e5863d3375..8491979f4096 100644
--- 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 5837eb8a212f..3b8f0e14fa01 100644
--- a/drivers/clk/mvebu/clk-cpu.c
+++ b/drivers/clk/mvebu/clk-cpu.c
@@ -165,7 +165,9 @@ static const struct clk_ops cpu_ops = {
.set_rate = clk_cpu_set_rate,
};
-static void __init of_cpu_clk_setup(struct device_node *node)
+/* Add parameter to allow this to support different clock operations. */
+static void __init _of_cpu_clk_setup(struct device_node *node,
+ const struct clk_ops *cpu_clk_ops)
{
struct cpu_clk *cpuclk;
void __iomem *clock_complex_base = of_iomap(node, 0);
@@ -218,7 +220,7 @@ static void __init of_cpu_clk_setup(struct device_node *node)
cpuclk[cpu].hw.init = &init;
init.name = cpuclk[cpu].clk_name;
- init.ops = &cpu_ops;
+ init.ops = cpu_clk_ops;
init.flags = 0;
init.parent_names = &cpuclk[cpu].parent_name;
init.num_parents = 1;
@@ -243,5 +245,30 @@ static void __init of_cpu_clk_setup(struct device_node *node)
iounmap(clock_complex_base);
}
+/* Use this function to call the generic setup with the correct
+ * clock operation
+ */
+static void __init of_cpu_clk_setup(struct device_node *node)
+{
+ _of_cpu_clk_setup(node, &cpu_ops);
+}
+
CLK_OF_DECLARE(armada_xp_cpu_clock, "marvell,armada-xp-cpu-clock",
of_cpu_clk_setup);
+
+/* Define the clock and operations for the mv98dx3236 - it cannot perform
+ * any operations.
+ */
+static const struct clk_ops mv98dx3236_cpu_ops = {
+ .recalc_rate = NULL,
+ .round_rate = NULL,
+ .set_rate = NULL,
+};
+
+static void __init of_mv98dx3236_cpu_clk_setup(struct device_node *node)
+{
+ _of_cpu_clk_setup(node, &mv98dx3236_cpu_ops);
+}
+
+CLK_OF_DECLARE(mv98dx3236_cpu_clock, "marvell,mv98dx3236-cpu-clock",
+ of_mv98dx3236_cpu_clk_setup);
--
2.11.0.24.ge6920cf