ARM i.MX6: Fix ethernet PLL clocks

In current code the ethernet PLL is not handled correctly. The PLL runs at 500MHz
and has different outputs. Only the enet reference clock is implemented. This
patch changes the PLL so that it outputs 500MHz and adds the additional outputs
as dividers. This now matches the datasheet which says:

> This PLL synthesizes a low jitter clock from 24 MHz reference clock.
> The PLL outputs a 500 MHz clock. The reference clocks generated by this PLL are:
>  • Ref_PCIe = 125 MHz
>  • Ref_SATA = 100 MHz
>  • Ref_ethernet, which is configurable based on the PLL_ENET[1:0] register field.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>

1 files changed, 19 insertions, 1 deletions

diff --git a/arch/arm/mach-imx/clk-imx6q.c b/arch/arm/mach-imx/clk-imx6q.c
index 0d60cb0e30fb..d8049d3f9801 100644
--- a/arch/arm/mach-imx/clk-imx6q.c
+++ b/arch/arm/mach-imx/clk-imx6q.c
@@ -154,6 +154,7 @@ enum mx6q_clks {
         usdhc4, vdo_axi, vpu_axi, cko1, pll1_sys, pll2_bus, pll3_usb_otg,
         pll4_audio, pll5_video, pll8_mlb, pll7_usb_host, pll6_enet, ssi1_ipg,
         ssi2_ipg, ssi3_ipg, rom, usbphy1, usbphy2, ldb_di0_div_3_5, ldb_di1_div_3_5,
+        sata_ref, sata_ref_100m, pcie_ref, pcie_ref_125m, enet_ref,
         clk_max
 };
 
@@ -164,6 +165,13 @@ static enum mx6q_clks const clks_init_on[] __initconst = {
         mmdc_ch0_axi, rom,
 };
 
+static struct clk_div_table clk_enet_ref_table[] = {
+        { .val = 0, .div = 20, },
+        { .val = 1, .div = 10, },
+        { .val = 2, .div = 5, },
+        { .val = 3, .div = 4, },
+};
+
 int __init mx6q_clocks_init(void)
 {
         struct device_node *np;
@@ -196,13 +204,23 @@ int __init mx6q_clocks_init(void)
         clk[pll3_usb_otg]  = imx_clk_pllv3(IMX_PLLV3_USB,       "pll3_usb_otg", "osc", base + 0x10, 0x2000,   0x3);
         clk[pll4_audio]    = imx_clk_pllv3(IMX_PLLV3_AV,        "pll4_audio",   "osc", base + 0x70, 0x2000,   0x7f);
         clk[pll5_video]    = imx_clk_pllv3(IMX_PLLV3_AV,        "pll5_video",   "osc", base + 0xa0, 0x2000,   0x7f);
-        clk[pll6_enet]     = imx_clk_pllv3(IMX_PLLV3_ENET,      "pll6_enet",    "osc", base + 0xe0, 0x182000, 0x3);
+        clk[pll6_enet]     = imx_clk_pllv3(IMX_PLLV3_ENET,      "pll6_enet",    "osc", base + 0xe0, 0x2000,   0x3);
         clk[pll7_usb_host] = imx_clk_pllv3(IMX_PLLV3_USB,       "pll7_usb_host","osc", base + 0x20, 0x2000,   0x3);
         clk[pll8_mlb]      = imx_clk_pllv3(IMX_PLLV3_MLB,       "pll8_mlb",     "osc", base + 0xd0, 0x2000,   0x0);
 
         clk[usbphy1] = imx_clk_gate("usbphy1", "pll3_usb_otg", base + 0x10, 6);
         clk[usbphy2] = imx_clk_gate("usbphy2", "pll7_usb_host", base + 0x20, 6);
 
+        clk[sata_ref] = imx_clk_fixed_factor("sata_ref", "pll6_enet", 1, 5);
+        clk[pcie_ref] = imx_clk_fixed_factor("pcie_ref", "pll6_enet", 1, 4);
+
+        clk[sata_ref_100m] = imx_clk_gate("sata_ref_100m", "sata_ref", base + 0xe0, 20);
+        clk[pcie_ref_125m] = imx_clk_gate("pcie_ref_125m", "pcie_ref", base + 0xe0, 19);
+
+        clk[enet_ref] = clk_register_divider_table(NULL, "enet_ref", "pll6_enet", 0,
+                        base + 0xe0, 0, 2, 0, clk_enet_ref_table,
+                        &imx_ccm_lock);
+
         /*                                name              parent_name        reg       idx */
         clk[pll2_pfd0_352m] = imx_clk_pfd("pll2_pfd0_352m", "pll2_bus",     base + 0x100, 0);
         clk[pll2_pfd1_594m] = imx_clk_pfd("pll2_pfd1_594m", "pll2_bus",     base + 0x100, 1);