On 25/12/2023 08:44, Luo Jie wrote:
The reference clock of CMN PLL block is selectable, the internal
48MHZ is used by default.
The output clock of CMN PLL block is for providing the clock
source of ethernet device(such as qca8084), there are 1 * 25MHZ
and 3 * 50MHZ output clocks available for the ethernet devices.
Signed-off-by: Luo Jie <quic_luoj@xxxxxxxxxxx>
---
drivers/net/mdio/mdio-ipq4019.c | 129 +++++++++++++++++++++++++++++++-
1 file changed, 128 insertions(+), 1 deletion(-)
diff --git a/drivers/net/mdio/mdio-ipq4019.c b/drivers/net/mdio/mdio-ipq4019.c
index e24b0e688b10..e4862ac02026 100644
--- a/drivers/net/mdio/mdio-ipq4019.c
+++ b/drivers/net/mdio/mdio-ipq4019.c
@@ -44,6 +44,17 @@
/* Maximum SOC PCS(uniphy) number on IPQ platform */
#define ETH_LDO_RDY_CNT 3
+#define CMN_PLL_REFERENCE_SOURCE_SEL 0x28
+#define CMN_PLL_REFCLK_SOURCE_DIV GENMASK(9, 8)
+
+#define CMN_PLL_REFERENCE_CLOCK 0x784
+#define CMN_PLL_REFCLK_EXTERNAL BIT(9)
+#define CMN_PLL_REFCLK_DIV GENMASK(8, 4)
+#define CMN_PLL_REFCLK_INDEX GENMASK(3, 0)
+
+#define CMN_PLL_POWER_ON_AND_RESET 0x780
+#define CMN_ANA_EN_SW_RSTN BIT(6)
+
enum mdio_clk_id {
MDIO_CLK_MDIO_AHB,
MDIO_CLK_UNIPHY0_AHB,
@@ -55,6 +66,7 @@ enum mdio_clk_id {
struct ipq4019_mdio_data {
void __iomem *membase;
+ void __iomem *cmn_membase;
void __iomem *eth_ldo_rdy[ETH_LDO_RDY_CNT];
struct clk *clk[MDIO_CLK_CNT];
};
@@ -227,12 +239,116 @@ static int ipq4019_mdio_write_c22(struct mii_bus *bus, int mii_id, int regnum,
return 0;
}
+/* For the CMN PLL block, the reference clock can be configured according to
+ * the device tree property "qcom,cmn-ref-clock-frequency", the internal 48MHZ
+ * is used by default.
+ *
+ * The output clock of CMN PLL block is provided to the ethernet devices,
+ * threre are 4 CMN PLL output clocks (1*25MHZ + 3*50MHZ) enabled by default.
+ *
+ * Such as the output 50M clock for the qca8084 ethernet PHY.
+ */
+static int ipq_cmn_clock_config(struct mii_bus *bus)
+{
+ struct ipq4019_mdio_data *priv;
+ u32 reg_val, src_sel, ref_clk;
+ int ret;
+
+ priv = bus->priv;
+ if (priv->cmn_membase) {
if (!priv->cnm_membase)
return 0;
then move the indentation here one tab left.
---
bod
