[PATCH v7 5/7] clk: starfive: jh7110-sys: Add PLL clocks source from DTS

Xingyu Wu
2023-07-17T02:31:04Z

Modify PLL clocks source to be got from DTS or
the fixed factor clocks.

Signed-off-by: Xingyu Wu <xingyu.wu@starfivetech.com>
---
drivers/clk/starfive/Kconfig | 1 +
.../clk/starfive/clk-starfive-jh7110-sys.c | 66 ++++++++++++-------
2 files changed, 45 insertions(+), 22 deletions(-)

diff --git a/drivers/clk/starfive/Kconfig b/drivers/clk/starfive/Kconfig
index 5195f7be5213..978b78ec08b1 100644
--- a/drivers/clk/starfive/Kconfig
+++ b/drivers/clk/starfive/Kconfig
@@ -35,6 +35,7 @@ config CLK_STARFIVE_JH7110_SYS
select AUXILIARY_BUS
select CLK_STARFIVE_JH71X0
select RESET_STARFIVE_JH7110 if RESET_CONTROLLER
+ select CLK_STARFIVE_JH7110_PLL
default ARCH_STARFIVE
help
Say yes here to support the system clock controller on the
diff --git a/drivers/clk/starfive/clk-starfive-jh7110-sys.c b/drivers/clk/starfive/clk-starfive-jh7110-sys.c
index e6031345ef05..3884eff9fe93 100644
--- a/drivers/clk/starfive/clk-starfive-jh7110-sys.c
+++ b/drivers/clk/starfive/clk-starfive-jh7110-sys.c
@@ -7,6 +7,7 @@
*/

#include <linux/auxiliary_bus.h>
+#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/init.h>
#include <linux/io.h>
@@ -389,6 +390,7 @@ static int __init jh7110_syscrg_probe(struct platform_device *pdev)
struct jh71x0_clk_priv *priv;
unsigned int idx;
int ret;
+ struct clk *pllclk;

priv = devm_kzalloc(&pdev->dev,
struct_size(priv, reg, JH7110_SYSCLK_END),
@@ -402,28 +404,42 @@ static int __init jh7110_syscrg_probe(struct platform_device *pdev)
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);

- /*
- * These PLL clocks are not actually fixed factor clocks and can be
- * controlled by the syscon registers of JH7110. They will be dropped
- * and registered in the PLL clock driver instead.
- */
- /* 24MHz -> 1000.0MHz */
- priv->pll[0] = devm_clk_hw_register_fixed_factor(priv->dev, "pll0_out",
- "osc", 0, 125, 3);
- if (IS_ERR(priv->pll[0]))
- return PTR_ERR(priv->pll[0]);
-
- /* 24MHz -> 1066.0MHz */
- priv->pll[1] = devm_clk_hw_register_fixed_factor(priv->dev, "pll1_out",
- "osc", 0, 533, 12);
- if (IS_ERR(priv->pll[1]))
- return PTR_ERR(priv->pll[1]);
-
- /* 24MHz -> 1188.0MHz */
- priv->pll[2] = devm_clk_hw_register_fixed_factor(priv->dev, "pll2_out",
- "osc", 0, 99, 2);
- if (IS_ERR(priv->pll[2]))
- return PTR_ERR(priv->pll[2]);
+ /* Use fixed factor clocks if can not get the PLL clocks from DTS */
+ pllclk = clk_get(priv->dev, "pll0_out");
+ if (IS_ERR(pllclk)) {
+ /* 24MHz -> 1000.0MHz */
+ priv->pll[0] = devm_clk_hw_register_fixed_factor(priv->dev, "pll0_out",
+ "osc", 0, 125, 3);
+ if (IS_ERR(priv->pll[0]))
+ return PTR_ERR(priv->pll[0]);
+ } else {
+ clk_put(pllclk);
+ priv->pll[0] = NULL;
+ }
+
+ pllclk = clk_get(priv->dev, "pll1_out");
+ if (IS_ERR(pllclk)) {
+ /* 24MHz -> 1066.0MHz */
+ priv->pll[1] = devm_clk_hw_register_fixed_factor(priv->dev, "pll1_out",
+ "osc", 0, 533, 12);
+ if (IS_ERR(priv->pll[1]))
+ return PTR_ERR(priv->pll[1]);
+ } else {
+ clk_put(pllclk);
+ priv->pll[1] = NULL;
+ }
+
+ pllclk = clk_get(priv->dev, "pll2_out");
+ if (IS_ERR(pllclk)) {
+ /* 24MHz -> 1188.0MHz */
+ priv->pll[2] = devm_clk_hw_register_fixed_factor(priv->dev, "pll2_out",
+ "osc", 0, 99, 2);
+ if (IS_ERR(priv->pll[2]))
+ return PTR_ERR(priv->pll[2]);
+ } else {
+ clk_put(pllclk);
+ priv->pll[2] = NULL;
+ }

for (idx = 0; idx < JH7110_SYSCLK_END; idx++) {
u32 max = jh7110_sysclk_data[idx].max;
@@ -462,6 +478,12 @@ static int __init jh7110_syscrg_probe(struct platform_device *pdev)
parents[i].fw_name = "tdm_ext";
else if (pidx == JH7110_SYSCLK_MCLK_EXT)
parents[i].fw_name = "mclk_ext";
+ else if (pidx == JH7110_SYSCLK_PLL0_OUT && !priv->pll[0])
+ parents[i].fw_name = "pll0_out";
+ else if (pidx == JH7110_SYSCLK_PLL1_OUT && !priv->pll[1])
+ parents[i].fw_name = "pll1_out";
+ else if (pidx == JH7110_SYSCLK_PLL2_OUT && !priv->pll[2])
+ parents[i].fw_name = "pll2_out";
else
parents[i].hw = priv->pll[pidx - JH7110_SYSCLK_PLL0_OUT];
}
--
2.25.1