diff mbox series

[PATCHv2,06/25] clk: fixed_rate: add API for directly registering fixed rate clocks

Message ID 20201120112326.10350-7-t-kristo@ti.com
State New
Delegated to: Lokesh Vutla
Headers show
Series J72xx: HSM rearch support series | expand

Commit Message

Tero Kristo Nov. 20, 2020, 11:23 a.m. UTC
Current driver only supports registering fixed rate clocks from DT. Add
new API which makes it possible to register fixed rate clocks directly
from e.g. platform specific clock drivers.

Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
---
 drivers/clk/clk_fixed_rate.c | 45 +++++++++++++++++++++++++++++++++++-
 include/linux/clk-provider.h |  3 +++
 2 files changed, 47 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/clk/clk_fixed_rate.c b/drivers/clk/clk_fixed_rate.c
index 55e1f8caa5..5556acaf86 100644
--- a/drivers/clk/clk_fixed_rate.c
+++ b/drivers/clk/clk_fixed_rate.c
@@ -8,6 +8,9 @@ 
 #include <dm.h>
 #include <linux/clk-provider.h>
 
+#define UBOOT_DM_CLK_FIXED_RATE "fixed_rate_clock"
+#define UBOOT_DM_CLK_FIXED_RATE_RAW "fixed_rate_raw_clock"
+
 static ulong clk_fixed_rate_get_rate(struct clk *clk)
 {
 	return to_clk_fixed_rate(clk->dev)->fixed_rate;
@@ -24,6 +27,15 @@  const struct clk_ops clk_fixed_rate_ops = {
 	.enable = dummy_enable,
 };
 
+static ulong clk_fixed_rate_raw_get_rate(struct clk *clk)
+{
+	return container_of(clk, struct clk_fixed_rate, clk)->fixed_rate;
+}
+
+const struct clk_ops clk_fixed_rate_raw_ops = {
+	.get_rate = clk_fixed_rate_raw_get_rate,
+};
+
 static int clk_fixed_rate_ofdata_to_platdata(struct udevice *dev)
 {
 	struct clk *clk = &to_clk_fixed_rate(dev)->clk;
@@ -39,6 +51,30 @@  static int clk_fixed_rate_ofdata_to_platdata(struct udevice *dev)
 	return 0;
 }
 
+struct clk *clk_register_fixed_rate(struct device *dev, const char *name,
+				    ulong rate)
+{
+	struct clk *clk;
+	struct clk_fixed_rate *fixed;
+	int ret;
+
+	fixed = kzalloc(sizeof(*fixed), GFP_KERNEL);
+	if (!fixed)
+		return ERR_PTR(-ENOMEM);
+
+	fixed->fixed_rate = rate;
+
+	clk = &fixed->clk;
+
+	ret = clk_register(clk, UBOOT_DM_CLK_FIXED_RATE_RAW, name, NULL);
+	if (ret) {
+		kfree(fixed);
+		return ERR_PTR(ret);
+	}
+
+	return clk;
+}
+
 static const struct udevice_id clk_fixed_rate_match[] = {
 	{
 		.compatible = "fixed-clock",
@@ -47,7 +83,7 @@  static const struct udevice_id clk_fixed_rate_match[] = {
 };
 
 U_BOOT_DRIVER(clk_fixed_rate) = {
-	.name = "fixed_rate_clock",
+	.name = UBOOT_DM_CLK_FIXED_RATE,
 	.id = UCLASS_CLK,
 	.of_match = clk_fixed_rate_match,
 	.ofdata_to_platdata = clk_fixed_rate_ofdata_to_platdata,
@@ -55,3 +91,10 @@  U_BOOT_DRIVER(clk_fixed_rate) = {
 	.ops = &clk_fixed_rate_ops,
 	.flags = DM_FLAG_PRE_RELOC,
 };
+
+U_BOOT_DRIVER(clk_fixed_rate_raw) = {
+	.name = UBOOT_DM_CLK_FIXED_RATE_RAW,
+	.id = UCLASS_CLK,
+	.ops = &clk_fixed_rate_raw_ops,
+	.flags = DM_FLAG_PRE_RELOC,
+};
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 79dce8f0ad..6b50c42214 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -186,6 +186,9 @@  struct clk *clk_register_mux(struct device *dev, const char *name,
 		void __iomem *reg, u8 shift, u8 width,
 		u8 clk_mux_flags);
 
+struct clk *clk_register_fixed_rate(struct device *dev, const char *name,
+				    ulong rate);
+
 const char *clk_hw_get_name(const struct clk *hw);
 ulong clk_generic_get_rate(struct clk *clk);