ARM: u300: convert MMC/SD clock to device tree
This converts the last of the U300 clocks to being probed from
the device tree.
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/Documentation/devicetree/bindings/clock/ste-u300-syscon-clock.txt b/Documentation/devicetree/bindings/clock/ste-u300-syscon-clock.txt
index b6a30f5..7cafcb9 100644
--- a/Documentation/devicetree/bindings/clock/ste-u300-syscon-clock.txt
+++ b/Documentation/devicetree/bindings/clock/ste-u300-syscon-clock.txt
@@ -55,3 +55,26 @@
(...)
clocks = <&gpio_clk>;
};
+
+
+Bindings for the MMC/SD card clock:
+
+Required properties:
+- compatible: must be "stericsson,u300-syscon-mclk"
+- #clock-cells: must be <0>
+
+Optional properties:
+- clocks: parent clock(s)
+
+mmc_mclk: mmc_mclk {
+ #clock-cells = <0>;
+ compatible = "stericsson,u300-syscon-mclk";
+ clocks = <&mmc_pclk>;
+};
+
+mmcsd: mmcsd@c0001000 {
+ compatible = "arm,pl18x", "arm,primecell";
+ clocks = <&mmc_pclk>, <&mmc_mclk>;
+ clock-names = "apb_pclk", "mclk";
+ (...)
+};
diff --git a/arch/arm/boot/dts/ste-u300.dts b/arch/arm/boot/dts/ste-u300.dts
index 7edc5e5..05a0821 100644
--- a/arch/arm/boot/dts/ste-u300.dts
+++ b/arch/arm/boot/dts/ste-u300.dts
@@ -205,6 +205,11 @@
clock-id = <5>;
clocks = <&fast_clk>;
};
+ mmc_mclk: mmc_mclk {
+ #clock-cells = <0>;
+ compatible = "stericsson,u300-syscon-mclk";
+ clocks = <&mmc_pclk>;
+ };
spi_clk: spi_p_clk@26M {
#clock-cells = <0>;
compatible = "stericsson,u300-syscon-clk";
@@ -433,8 +438,8 @@
reg = <0xc0001000 0x1000>;
interrupt-parent = <&vicb>;
interrupts = <6 7>;
- clocks = <&mmc_pclk>;
- clock-names = "apb_pclk";
+ clocks = <&mmc_pclk>, <&mmc_mclk>;
+ clock-names = "apb_pclk", "mclk";
max-frequency = <24000000>;
bus-width = <4>; // SD-card slot
mmc-cap-mmc-highspeed;
diff --git a/drivers/clk/clk-u300.c b/drivers/clk/clk-u300.c
index 5f234d3..8774e05 100644
--- a/drivers/clk/clk-u300.c
+++ b/drivers/clk/clk-u300.c
@@ -1139,6 +1139,18 @@
return clk;
}
+static void __init of_u300_syscon_mclk_init(struct device_node *np)
+{
+ struct clk *clk = ERR_PTR(-EINVAL);
+ const char *clk_name = np->name;
+ const char *parent_name;
+
+ parent_name = of_clk_get_parent_name(np, 0);
+ clk = mclk_clk_register(NULL, clk_name, parent_name, false);
+ if (!IS_ERR(clk))
+ of_clk_add_provider(np, of_clk_src_simple_get, clk);
+}
+
static const __initconst struct of_device_id u300_clk_match[] = {
{
.compatible = "fixed-clock",
@@ -1152,12 +1164,16 @@
.compatible = "stericsson,u300-syscon-clk",
.data = of_u300_syscon_clk_init,
},
+ {
+ .compatible = "stericsson,u300-syscon-mclk",
+ .data = of_u300_syscon_mclk_init,
+ },
};
+
void __init u300_clk_init(void __iomem *base)
{
u16 val;
- struct clk *clk;
syscon_vbase = base;
@@ -1175,8 +1191,4 @@
writew(val, syscon_vbase + U300_SYSCON_PMCR);
of_clk_init(u300_clk_match);
-
- /* Then this special MMC/SD clock */
- clk = mclk_clk_register(NULL, "mmc_clk", "mmc_p_clk", false);
- clk_register_clkdev(clk, NULL, "mmci");
}