clk: imx8mp: Add support for PCIe clocks

Add support for PCIe clocks required to enable PCIe support on
iMX8MP SoC.

Tested-by: Tim Harvey <tharvey@gateworks.com> #imx8mp-venice*
Tested-by: Adam Ford <aford173@gmail.com> #imx8mp-beacon-kit
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>

diff --git a/drivers/clk/imx/clk-imx8mp.c b/drivers/clk/imx/clk-imx8mp.c
index a21a3ce34bbc567f7cb2e41fadec1dcb837665e3..7dfc829df2c44158d8c0d1ab8337ef7ef7a71a43 100644 (file)
--- a/drivers/clk/imx/clk-imx8mp.c
+++ b/drivers/clk/imx/clk-imx8mp.c
@@ -62,6 +62,10 @@ static const char *imx8mp_dram_apb_sels[] = {"clock-osc-24m", "sys_pll2_200m", "
                                             "sys_pll1_160m", "sys_pll1_800m", "sys_pll3_out",
                                             "sys_pll2_250m", "audio_pll2_out", };
 
+static const char * const imx8mp_pcie_aux_sels[] = {"clock-osc-24m", "sys_pll2_200m", "sys_pll2_50m",
+                                                   "sys_pll3_out", "sys_pll2_100m", "sys_pll1_80m",
+                                                   "sys_pll1_160m", "sys_pll1_200m", };
+
 static const char *imx8mp_i2c5_sels[] = {"clock-osc-24m", "sys_pll1_160m", "sys_pll2_50m",
                                         "sys_pll3_out", "audio_pll1_out", "video_pll1_out",
                                         "audio_pll2_out", "sys_pll1_133m", };
@@ -272,6 +276,7 @@ static int imx8mp_clk_probe(struct udevice *dev)
 
        clk_dm(IMX8MP_CLK_DRAM_ALT, imx8m_clk_composite("dram_alt", imx8mp_dram_alt_sels, base + 0xa000));
        clk_dm(IMX8MP_CLK_DRAM_APB, imx8m_clk_composite_critical("dram_apb", imx8mp_dram_apb_sels, base + 0xa080));
+       clk_dm(IMX8MP_CLK_PCIE_AUX, imx8m_clk_composite("pcie_aux", imx8mp_pcie_aux_sels, base + 0xa400));
        clk_dm(IMX8MP_CLK_I2C5, imx8m_clk_composite("i2c5", imx8mp_i2c5_sels, base + 0xa480));
        clk_dm(IMX8MP_CLK_I2C6, imx8m_clk_composite("i2c6", imx8mp_i2c6_sels, base + 0xa500));
        clk_dm(IMX8MP_CLK_ENET_QOS, imx8m_clk_composite("enet_qos", imx8mp_enet_qos_sels, base + 0xa880));
@@ -322,6 +327,7 @@ static int imx8mp_clk_probe(struct udevice *dev)
        clk_dm(IMX8MP_CLK_I2C2_ROOT, imx_clk_gate4("i2c2_root_clk", "i2c2", base + 0x4180, 0));
        clk_dm(IMX8MP_CLK_I2C3_ROOT, imx_clk_gate4("i2c3_root_clk", "i2c3", base + 0x4190, 0));
        clk_dm(IMX8MP_CLK_I2C4_ROOT, imx_clk_gate4("i2c4_root_clk", "i2c4", base + 0x41a0, 0));
+       clk_dm(IMX8MP_CLK_PCIE_ROOT, imx_clk_gate4("pcie_root_clk", "pcie_aux", base + 0x4250, 0));
        clk_dm(IMX8MP_CLK_PWM1_ROOT, imx_clk_gate4("pwm1_root_clk", "pwm1", base + 0x4280, 0));
        clk_dm(IMX8MP_CLK_PWM2_ROOT, imx_clk_gate4("pwm2_root_clk", "pwm2", base + 0x4290, 0));
        clk_dm(IMX8MP_CLK_PWM3_ROOT, imx_clk_gate4("pwm3_root_clk", "pwm3", base + 0x42a0, 0));