[PATCH v3 02/13] clk: sunxi: Add mod0 and mmc module clock support for A80

Chen-Yu Tsai
2015-01-13T01:37:24Z

The module 0 style clocks, or storage module clocks as named in the
official SDK, are almost the same as the module 0 clocks on earlier
Allwinner SoCs. The only difference is wider mux register bits.

As with earlier Allwinner SoCs, mmc module clocks are a special case
of mod0 clocks, with phase controls for 2 child clocks, output and
sample.

This patch adds support for both.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
Documentation/devicetree/bindings/clock/sunxi.txt | 7 +++--
drivers/clk/sunxi/clk-mod0.c | 32 +++++++++++++++++++++++
2 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/clock/sunxi.txt b/Documentation/devicetree/bindings/clock/sunxi.txt
index e4c42276c577..0dfd018ba47b 100644
--- a/Documentation/devicetree/bindings/clock/sunxi.txt
+++ b/Documentation/devicetree/bindings/clock/sunxi.txt
@@ -56,7 +56,9 @@ Required properties:
"allwinner,sun8i-a23-apb2-gates-clk" - for the APB2 gates on A23
"allwinner,sun5i-a13-mbus-clk" - for the MBUS clock on A13
"allwinner,sun4i-a10-mmc-clk" - for the MMC clock
+ "allwinner,sun9i-a80-mmc-clk" - for mmc module clocks on A80
"allwinner,sun4i-a10-mod0-clk" - for the module 0 family of clocks
+ "allwinner,sun9i-a80-mod0-clk" - for module 0 (storage) clocks on A80
"allwinner,sun8i-a23-mbus-clk" - for the MBUS clock on A23
"allwinner,sun7i-a20-out-clk" - for the external output clocks
"allwinner,sun7i-a20-gmac-clk" - for the GMAC clock module on A20/A31
@@ -72,7 +74,8 @@ Required properties for all clocks:
- #clock-cells : from common clock binding; shall be set to 0 except for
the following compatibles where it shall be set to 1:
"allwinner,*-gates-clk", "allwinner,sun4i-pll5-clk",
- "allwinner,sun4i-pll6-clk", "allwinner,sun6i-a31-pll6-clk"
+ "allwinner,sun4i-pll6-clk", "allwinner,sun6i-a31-pll6-clk",
+ "allwinner,*-usb-clk", "allwinner,*-mmc-clk"
- clock-output-names : shall be the corresponding names of the outputs.
If the clock module only has one output, the name shall be the
module name.
@@ -94,7 +97,7 @@ For "allwinner,sun6i-a31-pll6-clk", there are 2 outputs. The first output
is the normal PLL6 output, or "pll6". The second output is rate doubled
PLL6, or "pll6x2".

-The "allwinner,sun4i-a10-mmc-clk" has three different outputs: the
+The "allwinner,*-mmc-clk" clocks have three different outputs: the
main clock, with the ID 0, and the output and sample clocks, with the
IDs 1 and 2, respectively.

diff --git a/drivers/clk/sunxi/clk-mod0.c b/drivers/clk/sunxi/clk-mod0.c
index 4430d1398ce6..99ff2c7cccf7 100644
--- a/drivers/clk/sunxi/clk-mod0.c
+++ b/drivers/clk/sunxi/clk-mod0.c
@@ -130,6 +130,30 @@ static struct platform_driver sun4i_a10_mod0_clk_driver = {
};
module_platform_driver(sun4i_a10_mod0_clk_driver);

+static const struct factors_data sun9i_a80_mod0_data __initconst = {
+ .enable = 31,
+ .mux = 24,
+ .muxmask = BIT(3) | BIT(2) | BIT(1) | BIT(0),
+ .table = &sun4i_a10_mod0_config,
+ .getter = sun4i_a10_get_mod0_factors,
+};
+
+static void __init sun9i_a80_mod0_setup(struct device_node *node)
+{
+ void __iomem *reg;
+
+ reg = of_io_request_and_map(node, 0, of_node_full_name(node));
+ if (!reg) {
+ pr_err("Could not get registers for mod0-clk: %s\n",
+ node->name);
+ return;
+ }
+
+ sunxi_factors_register(node, &sun9i_a80_mod0_data,
+ &sun4i_a10_mod0_lock, reg);
+}
+CLK_OF_DECLARE(sun9i_a80_mod0, "allwinner,sun9i-a80-mod0-clk", sun9i_a80_mod0_setup);
+
static DEFINE_SPINLOCK(sun5i_a13_mbus_lock);

static void __init sun5i_a13_mbus_setup(struct device_node *node)
@@ -358,3 +382,11 @@ static void __init sun4i_a10_mmc_setup(struct device_node *node)
sunxi_mmc_setup(node, &sun4i_a10_mod0_data, &sun4i_a10_mmc_lock);
}
CLK_OF_DECLARE(sun4i_a10_mmc, "allwinner,sun4i-a10-mmc-clk", sun4i_a10_mmc_setup);
+
+static DEFINE_SPINLOCK(sun9i_a80_mmc_lock);
+
+static void __init sun9i_a80_mmc_setup(struct device_node *node)
+{
+ sunxi_mmc_setup(node, &sun9i_a80_mod0_data, &sun9i_a80_mmc_lock);
+}
+CLK_OF_DECLARE(sun9i_a80_mmc, "allwinner,sun9i-a80-mmc-clk", sun9i_a80_mmc_setup);
--
2.1.4