diff options
| -rw-r--r-- | arch/arm/mach-imx/imx8m/clock_imx8mm.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/imx8m/clock_imx8mm.c b/arch/arm/mach-imx/imx8m/clock_imx8mm.c index 68effbd54f..3610f5b2fc 100644 --- a/arch/arm/mach-imx/imx8m/clock_imx8mm.c +++ b/arch/arm/mach-imx/imx8m/clock_imx8mm.c @@ -788,6 +788,96 @@ u32 mxc_get_clock(enum mxc_clock clk) return 0; } +#ifdef CONFIG_DWC_ETH_QOS +int set_clk_eqos(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_QOS_ETHENET, 0); + clock_enable(CCGR_SDMA2, 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_QOS_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_QOS_TIMER_CLK_ROOT, target); + + /* enable clock */ + clock_enable(CCGR_QOS_ETHENET, 1); + clock_enable(CCGR_SDMA2, 1); + + return 0; +} + +int imx_eqos_txclk_set_rate(u32 rate) +{ + u32 val; + u32 eqos_post_div; + + /* disable the clock first */ + clock_enable(CCGR_QOS_ETHENET, 0); + clock_enable(CCGR_SDMA2, 0); + + switch (rate) { + case 125000000: + eqos_post_div = 1; + break; + case 25000000: + eqos_post_div = 125000000 / 25000000; + break; + case 2500000: + eqos_post_div = 125000000 / 2500000; + break; + default: + return -EINVAL; + } + + clock_get_target_val(ENET_QOS_CLK_ROOT, &val); + val &= ~(CLK_ROOT_PRE_DIV_MASK | CLK_ROOT_POST_DIV_MASK); + val |= CLK_ROOT_PRE_DIV(CLK_ROOT_PRE_DIV1) | + CLK_ROOT_POST_DIV(eqos_post_div - 1); + clock_set_target_val(ENET_QOS_CLK_ROOT, val); + + /* enable clock */ + clock_enable(CCGR_QOS_ETHENET, 1); + clock_enable(CCGR_SDMA2, 1); + + return 0; +} + +u32 imx_get_eqos_csr_clk(void) +{ + return get_root_clk(ENET_AXI_CLK_ROOT); +} +#endif + #ifdef CONFIG_FEC_MXC int set_clk_enet(enum enet_freq type) { |