ARM: imx: imx8mm: Add missing clock entries for FEC clock

All the FEC ethernet clock entries for iMX8MM are missing, while they
are already present on iMX8MQ. Fill in the nodes on iMX8MM, as the FEC
ethernet gets bogus clock information otherwise which makes ethernet
inoperable.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Reviewed-by: Fabio Estevam <festevam@gmail.com>

2 files changed, 74 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/imx8m/clock_imx8mm.c b/arch/arm/mach-imx/imx8m/clock_imx8mm.c
index c423ac0058..d123ba1625 100644
--- a/arch/arm/mach-imx/imx8m/clock_imx8mm.c
+++ b/arch/arm/mach-imx/imx8m/clock_imx8mm.c
@@ -578,3 +578,52 @@ u32 mxc_get_clock(enum mxc_clock clk)
 
 	return 0;
 }
+
+#ifdef CONFIG_FEC_MXC
+int set_clk_enet(enum enet_freq type)
+{
+	u32 target;
+	u32 enet1_ref;
+
+	switch (type) {
+	case ENET_125MHZ:
+		enet1_ref = ENET1_REF_CLK_ROOT_FROM_PLL_ENET_MAIN_125M_CLK;
+		break;
+	case ENET_50MHZ:
+		enet1_ref = ENET1_REF_CLK_ROOT_FROM_PLL_ENET_MAIN_50M_CLK;
+		break;
+	case ENET_25MHZ:
+		enet1_ref = ENET1_REF_CLK_ROOT_FROM_PLL_ENET_MAIN_25M_CLK;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* disable the clock first */
+	clock_enable(CCGR_ENET1, 0);
+	clock_enable(CCGR_SIM_ENET, 0);
+
+	/* set enet axi clock 266Mhz */
+	target = CLK_ROOT_ON | ENET_AXI_CLK_ROOT_FROM_SYS1_PLL_266M |
+		 CLK_ROOT_PRE_DIV(CLK_ROOT_PRE_DIV1) |
+		 CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV1);
+	clock_set_target_val(ENET_AXI_CLK_ROOT, target);
+
+	target = CLK_ROOT_ON | enet1_ref |
+		 CLK_ROOT_PRE_DIV(CLK_ROOT_PRE_DIV1) |
+		 CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV1);
+	clock_set_target_val(ENET_REF_CLK_ROOT, target);
+
+	target = CLK_ROOT_ON |
+		ENET1_TIME_CLK_ROOT_FROM_PLL_ENET_MAIN_100M_CLK |
+		CLK_ROOT_PRE_DIV(CLK_ROOT_PRE_DIV1) |
+		CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV4);
+	clock_set_target_val(ENET_TIMER_CLK_ROOT, target);
+
+	/* enable clock */
+	clock_enable(CCGR_SIM_ENET, 1);
+	clock_enable(CCGR_ENET1, 1);
+
+	return 0;
+}
+#endif
diff --git a/arch/arm/mach-imx/imx8m/clock_slice.c b/arch/arm/mach-imx/imx8m/clock_slice.c
index 8b7a4dad65..9e84e8d5b1 100644
--- a/arch/arm/mach-imx/imx8m/clock_slice.c
+++ b/arch/arm/mach-imx/imx8m/clock_slice.c
@@ -482,6 +482,16 @@ static struct clk_root_map root_array[] = {
 	  SYSTEM_PLL2_1000M_CLK, SYSTEM_PLL1_800M_CLK,
 	  SYSTEM_PLL1_400M_CLK, AUDIO_PLL1_CLK, SYSTEM_PLL3_CLK}
 	},
+	{MAIN_AXI_CLK_ROOT, BUS_CLOCK_SLICE, 0,
+	 {OSC_24M_CLK, SYSTEM_PLL2_333M_CLK, SYSTEM_PLL1_800M_CLK,
+	  SYSTEM_PLL2_250M_CLK, SYSTEM_PLL2_1000M_CLK,
+	  AUDIO_PLL1_CLK, VIDEO_PLL_CLK, SYSTEM_PLL1_100M_CLK}
+	},
+	{ENET_AXI_CLK_ROOT, BUS_CLOCK_SLICE, 1,
+	 {OSC_24M_CLK, SYSTEM_PLL1_266M_CLK, SYSTEM_PLL1_800M_CLK,
+	  SYSTEM_PLL2_250M_CLK, SYSTEM_PLL2_200M_CLK,
+	  AUDIO_PLL1_CLK, VIDEO_PLL_CLK, SYSTEM_PLL3_CLK}
+	},
 	{NAND_USDHC_BUS_CLK_ROOT, BUS_CLOCK_SLICE, 2,
 	 {OSC_24M_CLK, SYSTEM_PLL1_266M_CLK, SYSTEM_PLL1_800M_CLK,
 	  SYSTEM_PLL2_200M_CLK, SYSTEM_PLL1_133M_CLK,
@@ -509,6 +519,21 @@ static struct clk_root_map root_array[] = {
 	  SYSTEM_PLL1_160M_CLK, SYSTEM_PLL1_800M_CLK,
 	  SYSTEM_PLL3_CLK, SYSTEM_PLL2_250M_CLK, AUDIO_PLL2_CLK}
 	},
+	{ENET_REF_CLK_ROOT, IP_CLOCK_SLICE, 19,
+	 {OSC_24M_CLK, SYSTEM_PLL2_125M_CLK, SYSTEM_PLL2_50M_CLK,
+	  SYSTEM_PLL2_100M_CLK, SYSTEM_PLL1_160M_CLK,
+	  AUDIO_PLL1_CLK, VIDEO_PLL_CLK, EXT_CLK_4}
+	},
+	{ENET_TIMER_CLK_ROOT, IP_CLOCK_SLICE, 20,
+	 {OSC_24M_CLK, SYSTEM_PLL2_100M_CLK, AUDIO_PLL1_CLK,
+	  EXT_CLK_1, EXT_CLK_2, EXT_CLK_3, EXT_CLK_4,
+	  VIDEO_PLL_CLK}
+	},
+	{ENET_PHY_REF_CLK_ROOT, IP_CLOCK_SLICE, 21,
+	 {OSC_24M_CLK, SYSTEM_PLL2_50M_CLK, SYSTEM_PLL2_125M_CLK,
+	  SYSTEM_PLL2_200M_CLK, SYSTEM_PLL2_500M_CLK,
+	  AUDIO_PLL1_CLK, VIDEO_PLL_CLK, AUDIO_PLL2_CLK}
+	},
 	{UART1_CLK_ROOT, IP_CLOCK_SLICE, 30,
 	 {OSC_24M_CLK, SYSTEM_PLL1_80M_CLK, SYSTEM_PLL2_200M_CLK,
 	  SYSTEM_PLL2_100M_CLK, SYSTEM_PLL3_CLK,