clk: qcom: sm8550: add support for PCIe clocks

Add the PCIe clocks for the SM8550 GCC.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20241125-topic-pcie-clk-v1-2-4315d1e4e164@linaro.org
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>

diff --git a/drivers/clk/qcom/clock-sm8550.c b/drivers/clk/qcom/clock-sm8550.c
index c024992..62b5a40 100644 (file)
--- a/drivers/clk/qcom/clock-sm8550.c
+++ b/drivers/clk/qcom/clock-sm8550.c
@@ -57,6 +57,16 @@ static const struct freq_tbl ftbl_gcc_usb30_prim_master_clk_src[] = {
        { }
 };
 
+static const struct freq_tbl ftbl_gcc_pcie_0_aux_clk_src[] = {
+       F(19200000, CFG_CLK_SRC_CXO, 1, 0, 0),
+       { }
+};
+
+static const struct freq_tbl ftbl_gcc_pcie_0_phy_rchng_clk_src[] = {
+       F(100000000, CFG_CLK_SRC_GPLL0_EVEN, 3, 0, 0),
+       { }
+};
+
 static ulong sm8550_set_rate(struct clk *clk, ulong rate)
 {
        struct msm_clk_priv *priv = dev_get_priv(clk->dev);
@@ -84,6 +94,24 @@ static ulong sm8550_set_rate(struct clk *clk, ulong rate)
        case GCC_USB3_PRIM_PHY_AUX_CLK_SRC:
                clk_rcg_set_rate(priv->base, 0x39070, 0, 0);
                return TCXO_DIV2_RATE;
+       case GCC_PCIE_0_AUX_CLK:
+               freq = qcom_find_freq(ftbl_gcc_pcie_0_aux_clk_src, rate);
+               clk_rcg_set_rate_mnd(priv->base, 0x6b074,
+                                    freq->pre_div, freq->m, freq->n, freq->src, 16);
+               return freq->freq;
+       case GCC_PCIE_1_AUX_CLK:
+               freq = qcom_find_freq(ftbl_gcc_pcie_0_aux_clk_src, rate);
+               clk_rcg_set_rate_mnd(priv->base, 0x8d07c,
+                                    freq->pre_div, freq->m, freq->n, freq->src, 16);
+               return freq->freq;
+       case GCC_PCIE_0_PHY_RCHNG_CLK:
+               freq = qcom_find_freq(ftbl_gcc_pcie_0_phy_rchng_clk_src, rate);
+               clk_rcg_set_rate(priv->base, 0x6b058, freq->pre_div, freq->src);
+               return freq->freq;
+       case GCC_PCIE_1_PHY_RCHNG_CLK:
+               freq = qcom_find_freq(ftbl_gcc_pcie_0_phy_rchng_clk_src, rate);
+               clk_rcg_set_rate(priv->base, 0x8d060, freq->pre_div, freq->src);
+               return freq->freq;
        default:
                return 0;
        }
@@ -182,6 +210,14 @@ static int sm8550_enable(struct clk *clk)
                qcom_gate_clk_en(priv, GCC_USB3_PRIM_PHY_AUX_CLK);
                qcom_gate_clk_en(priv, GCC_USB3_PRIM_PHY_COM_AUX_CLK);
                break;
+       case GCC_PCIE_0_PIPE_CLK:
+               // GCC_PCIE_0_PIPE_CLK_SRC
+               clk_phy_mux_enable(priv->base, 0x6b070, true);
+               break;
+       case GCC_PCIE_1_PIPE_CLK:
+               // GCC_PCIE_1_PIPE_CLK_SRC
+               clk_phy_mux_enable(priv->base, 0x8d078, true);
+               break;
        }
 
        qcom_gate_clk_en(priv, clk->id);