diff options
Diffstat (limited to 'arch/mips/ath79/clock.c')
| -rw-r--r-- | arch/mips/ath79/clock.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/arch/mips/ath79/clock.c b/arch/mips/ath79/clock.c index 6b1000b6a6a6..cf9158e3c2d9 100644 --- a/arch/mips/ath79/clock.c +++ b/arch/mips/ath79/clock.c @@ -355,6 +355,91 @@ static void __init ar934x_clocks_init(void) iounmap(dpll_base); } +static void __init qca953x_clocks_init(void) +{ + unsigned long ref_rate; + unsigned long cpu_rate; + unsigned long ddr_rate; + unsigned long ahb_rate; + u32 pll, out_div, ref_div, nint, frac, clk_ctrl, postdiv; + u32 cpu_pll, ddr_pll; + u32 bootstrap; + + bootstrap = ath79_reset_rr(QCA953X_RESET_REG_BOOTSTRAP); + if (bootstrap & QCA953X_BOOTSTRAP_REF_CLK_40) + ref_rate = 40 * 1000 * 1000; + else + ref_rate = 25 * 1000 * 1000; + + pll = ath79_pll_rr(QCA953X_PLL_CPU_CONFIG_REG); + out_div = (pll >> QCA953X_PLL_CPU_CONFIG_OUTDIV_SHIFT) & + QCA953X_PLL_CPU_CONFIG_OUTDIV_MASK; + ref_div = (pll >> QCA953X_PLL_CPU_CONFIG_REFDIV_SHIFT) & + QCA953X_PLL_CPU_CONFIG_REFDIV_MASK; + nint = (pll >> QCA953X_PLL_CPU_CONFIG_NINT_SHIFT) & + QCA953X_PLL_CPU_CONFIG_NINT_MASK; + frac = (pll >> QCA953X_PLL_CPU_CONFIG_NFRAC_SHIFT) & + QCA953X_PLL_CPU_CONFIG_NFRAC_MASK; + + cpu_pll = nint * ref_rate / ref_div; + cpu_pll += frac * (ref_rate >> 6) / ref_div; + cpu_pll /= (1 << out_div); + + pll = ath79_pll_rr(QCA953X_PLL_DDR_CONFIG_REG); + out_div = (pll >> QCA953X_PLL_DDR_CONFIG_OUTDIV_SHIFT) & + QCA953X_PLL_DDR_CONFIG_OUTDIV_MASK; + ref_div = (pll >> QCA953X_PLL_DDR_CONFIG_REFDIV_SHIFT) & + QCA953X_PLL_DDR_CONFIG_REFDIV_MASK; + nint = (pll >> QCA953X_PLL_DDR_CONFIG_NINT_SHIFT) & + QCA953X_PLL_DDR_CONFIG_NINT_MASK; + frac = (pll >> QCA953X_PLL_DDR_CONFIG_NFRAC_SHIFT) & + QCA953X_PLL_DDR_CONFIG_NFRAC_MASK; + + ddr_pll = nint * ref_rate / ref_div; + ddr_pll += frac * (ref_rate >> 6) / (ref_div << 4); + ddr_pll /= (1 << out_div); + + clk_ctrl = ath79_pll_rr(QCA953X_PLL_CLK_CTRL_REG); + + postdiv = (clk_ctrl >> QCA953X_PLL_CLK_CTRL_CPU_POST_DIV_SHIFT) & + QCA953X_PLL_CLK_CTRL_CPU_POST_DIV_MASK; + + if (clk_ctrl & QCA953X_PLL_CLK_CTRL_CPU_PLL_BYPASS) + cpu_rate = ref_rate; + else if (clk_ctrl & QCA953X_PLL_CLK_CTRL_CPUCLK_FROM_CPUPLL) + cpu_rate = cpu_pll / (postdiv + 1); + else + cpu_rate = ddr_pll / (postdiv + 1); + + postdiv = (clk_ctrl >> QCA953X_PLL_CLK_CTRL_DDR_POST_DIV_SHIFT) & + QCA953X_PLL_CLK_CTRL_DDR_POST_DIV_MASK; + + if (clk_ctrl & QCA953X_PLL_CLK_CTRL_DDR_PLL_BYPASS) + ddr_rate = ref_rate; + else if (clk_ctrl & QCA953X_PLL_CLK_CTRL_DDRCLK_FROM_DDRPLL) + ddr_rate = ddr_pll / (postdiv + 1); + else + ddr_rate = cpu_pll / (postdiv + 1); + + postdiv = (clk_ctrl >> QCA953X_PLL_CLK_CTRL_AHB_POST_DIV_SHIFT) & + QCA953X_PLL_CLK_CTRL_AHB_POST_DIV_MASK; + + if (clk_ctrl & QCA953X_PLL_CLK_CTRL_AHB_PLL_BYPASS) + ahb_rate = ref_rate; + else if (clk_ctrl & QCA953X_PLL_CLK_CTRL_AHBCLK_FROM_DDRPLL) + ahb_rate = ddr_pll / (postdiv + 1); + else + ahb_rate = cpu_pll / (postdiv + 1); + + ath79_add_sys_clkdev("ref", ref_rate); + ath79_add_sys_clkdev("cpu", cpu_rate); + ath79_add_sys_clkdev("ddr", ddr_rate); + ath79_add_sys_clkdev("ahb", ahb_rate); + + clk_add_alias("wdt", NULL, "ref", NULL); + clk_add_alias("uart", NULL, "ref", NULL); +} + static void __init qca955x_clocks_init(void) { unsigned long ref_rate; @@ -440,6 +525,110 @@ static void __init qca955x_clocks_init(void) clk_add_alias("uart", NULL, "ref", NULL); } +static void __init qca956x_clocks_init(void) +{ + unsigned long ref_rate; + unsigned long cpu_rate; + unsigned long ddr_rate; + unsigned long ahb_rate; + u32 pll, out_div, ref_div, nint, hfrac, lfrac, clk_ctrl, postdiv; + u32 cpu_pll, ddr_pll; + u32 bootstrap; + + /* + * QCA956x timer init workaround has to be applied right before setting + * up the clock. Else, there will be no jiffies + */ + u32 misc; + + misc = ath79_reset_rr(AR71XX_RESET_REG_MISC_INT_ENABLE); + misc |= MISC_INT_MIPS_SI_TIMERINT_MASK; + ath79_reset_wr(AR71XX_RESET_REG_MISC_INT_ENABLE, misc); + + bootstrap = ath79_reset_rr(QCA956X_RESET_REG_BOOTSTRAP); + if (bootstrap & QCA956X_BOOTSTRAP_REF_CLK_40) + ref_rate = 40 * 1000 * 1000; + else + ref_rate = 25 * 1000 * 1000; + + pll = ath79_pll_rr(QCA956X_PLL_CPU_CONFIG_REG); + out_div = (pll >> QCA956X_PLL_CPU_CONFIG_OUTDIV_SHIFT) & + QCA956X_PLL_CPU_CONFIG_OUTDIV_MASK; + ref_div = (pll >> QCA956X_PLL_CPU_CONFIG_REFDIV_SHIFT) & + QCA956X_PLL_CPU_CONFIG_REFDIV_MASK; + + pll = ath79_pll_rr(QCA956X_PLL_CPU_CONFIG1_REG); + nint = (pll >> QCA956X_PLL_CPU_CONFIG1_NINT_SHIFT) & + QCA956X_PLL_CPU_CONFIG1_NINT_MASK; + hfrac = (pll >> QCA956X_PLL_CPU_CONFIG1_NFRAC_H_SHIFT) & + QCA956X_PLL_CPU_CONFIG1_NFRAC_H_MASK; + lfrac = (pll >> QCA956X_PLL_CPU_CONFIG1_NFRAC_L_SHIFT) & + QCA956X_PLL_CPU_CONFIG1_NFRAC_L_MASK; + + cpu_pll = nint * ref_rate / ref_div; + cpu_pll += (lfrac * ref_rate) / ((ref_div * 25) << 13); + cpu_pll += (hfrac >> 13) * ref_rate / ref_div; + cpu_pll /= (1 << out_div); + + pll = ath79_pll_rr(QCA956X_PLL_DDR_CONFIG_REG); + out_div = (pll >> QCA956X_PLL_DDR_CONFIG_OUTDIV_SHIFT) & + QCA956X_PLL_DDR_CONFIG_OUTDIV_MASK; + ref_div = (pll >> QCA956X_PLL_DDR_CONFIG_REFDIV_SHIFT) & + QCA956X_PLL_DDR_CONFIG_REFDIV_MASK; + pll = ath79_pll_rr(QCA956X_PLL_DDR_CONFIG1_REG); + nint = (pll >> QCA956X_PLL_DDR_CONFIG1_NINT_SHIFT) & + QCA956X_PLL_DDR_CONFIG1_NINT_MASK; + hfrac = (pll >> QCA956X_PLL_DDR_CONFIG1_NFRAC_H_SHIFT) & + QCA956X_PLL_DDR_CONFIG1_NFRAC_H_MASK; + lfrac = (pll >> QCA956X_PLL_DDR_CONFIG1_NFRAC_L_SHIFT) & + QCA956X_PLL_DDR_CONFIG1_NFRAC_L_MASK; + + ddr_pll = nint * ref_rate / ref_div; + ddr_pll += (lfrac * ref_rate) / ((ref_div * 25) << 13); + ddr_pll += (hfrac >> 13) * ref_rate / ref_div; + ddr_pll /= (1 << out_div); + + clk_ctrl = ath79_pll_rr(QCA956X_PLL_CLK_CTRL_REG); + + postdiv = (clk_ctrl >> QCA956X_PLL_CLK_CTRL_CPU_POST_DIV_SHIFT) & + QCA956X_PLL_CLK_CTRL_CPU_POST_DIV_MASK; + + if (clk_ctrl & QCA956X_PLL_CLK_CTRL_CPU_PLL_BYPASS) + cpu_rate = ref_rate; + else if (clk_ctrl & QCA956X_PLL_CLK_CTRL_CPU_DDRCLK_FROM_CPUPLL) + cpu_rate = ddr_pll / (postdiv + 1); + else + cpu_rate = cpu_pll / (postdiv + 1); + + postdiv = (clk_ctrl >> QCA956X_PLL_CLK_CTRL_DDR_POST_DIV_SHIFT) & + QCA956X_PLL_CLK_CTRL_DDR_POST_DIV_MASK; + + if (clk_ctrl & QCA956X_PLL_CLK_CTRL_DDR_PLL_BYPASS) + ddr_rate = ref_rate; + else if (clk_ctrl & QCA956X_PLL_CLK_CTRL_CPU_DDRCLK_FROM_DDRPLL) + ddr_rate = cpu_pll / (postdiv + 1); + else + ddr_rate = ddr_pll / (postdiv + 1); + + postdiv = (clk_ctrl >> QCA956X_PLL_CLK_CTRL_AHB_POST_DIV_SHIFT) & + QCA956X_PLL_CLK_CTRL_AHB_POST_DIV_MASK; + + if (clk_ctrl & QCA956X_PLL_CLK_CTRL_AHB_PLL_BYPASS) + ahb_rate = ref_rate; + else if (clk_ctrl & QCA956X_PLL_CLK_CTRL_AHBCLK_FROM_DDRPLL) + ahb_rate = ddr_pll / (postdiv + 1); + else + ahb_rate = cpu_pll / (postdiv + 1); + + ath79_add_sys_clkdev("ref", ref_rate); + ath79_add_sys_clkdev("cpu", cpu_rate); + ath79_add_sys_clkdev("ddr", ddr_rate); + ath79_add_sys_clkdev("ahb", ahb_rate); + + clk_add_alias("wdt", NULL, "ref", NULL); + clk_add_alias("uart", NULL, "ref", NULL); +} + void __init ath79_clocks_init(void) { if (soc_is_ar71xx()) @@ -450,8 +639,12 @@ void __init ath79_clocks_init(void) ar933x_clocks_init(); else if (soc_is_ar934x()) ar934x_clocks_init(); + else if (soc_is_qca953x()) + qca953x_clocks_init(); else if (soc_is_qca955x()) qca955x_clocks_init(); + else if (soc_is_qca956x() || soc_is_tp9343()) + qca956x_clocks_init(); else BUG(); } |