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| author | Ralf Baechle <ralf@linux-mips.org> | 2013-02-21 12:51:33 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2013-02-21 12:51:33 +0100 |
| commit | 8bfc245f9ad7bd4e461179e4e7852ef99b8b6144 (patch) | |
| tree | 0ad091f645fbc8318634599d278966a53d3922ee /arch/mips/ath79/clock.c | |
| parent | MIPS: Quit exporting kernel internel break codes to uapi/asm/break.h (diff) | |
| parent | MIPS: remove broken conditional inside vpe loader code (diff) | |
| download | linux-8bfc245f9ad7bd4e461179e4e7852ef99b8b6144.tar.xz linux-8bfc245f9ad7bd4e461179e4e7852ef99b8b6144.zip | |
Merge branch 'mips-next-3.9' of git://git.linux-mips.org/pub/scm/john/linux-john into mips-for-linux-next
Diffstat (limited to 'arch/mips/ath79/clock.c')
| -rw-r--r-- | arch/mips/ath79/clock.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/mips/ath79/clock.c b/arch/mips/ath79/clock.c index 8c1b8bf9b32f..765ef30e3e1c 100644 --- a/arch/mips/ath79/clock.c +++ b/arch/mips/ath79/clock.c @@ -295,6 +295,82 @@ static void __init ar934x_clocks_init(void) iounmap(dpll_base); } +static void __init qca955x_clocks_init(void) +{ + u32 pll, out_div, ref_div, nint, frac, clk_ctrl, postdiv; + u32 cpu_pll, ddr_pll; + u32 bootstrap; + + bootstrap = ath79_reset_rr(QCA955X_RESET_REG_BOOTSTRAP); + if (bootstrap & QCA955X_BOOTSTRAP_REF_CLK_40) + ath79_ref_clk.rate = 40 * 1000 * 1000; + else + ath79_ref_clk.rate = 25 * 1000 * 1000; + + pll = ath79_pll_rr(QCA955X_PLL_CPU_CONFIG_REG); + out_div = (pll >> QCA955X_PLL_CPU_CONFIG_OUTDIV_SHIFT) & + QCA955X_PLL_CPU_CONFIG_OUTDIV_MASK; + ref_div = (pll >> QCA955X_PLL_CPU_CONFIG_REFDIV_SHIFT) & + QCA955X_PLL_CPU_CONFIG_REFDIV_MASK; + nint = (pll >> QCA955X_PLL_CPU_CONFIG_NINT_SHIFT) & + QCA955X_PLL_CPU_CONFIG_NINT_MASK; + frac = (pll >> QCA955X_PLL_CPU_CONFIG_NFRAC_SHIFT) & + QCA955X_PLL_CPU_CONFIG_NFRAC_MASK; + + cpu_pll = nint * ath79_ref_clk.rate / ref_div; + cpu_pll += frac * ath79_ref_clk.rate / (ref_div * (1 << 6)); + cpu_pll /= (1 << out_div); + + pll = ath79_pll_rr(QCA955X_PLL_DDR_CONFIG_REG); + out_div = (pll >> QCA955X_PLL_DDR_CONFIG_OUTDIV_SHIFT) & + QCA955X_PLL_DDR_CONFIG_OUTDIV_MASK; + ref_div = (pll >> QCA955X_PLL_DDR_CONFIG_REFDIV_SHIFT) & + QCA955X_PLL_DDR_CONFIG_REFDIV_MASK; + nint = (pll >> QCA955X_PLL_DDR_CONFIG_NINT_SHIFT) & + QCA955X_PLL_DDR_CONFIG_NINT_MASK; + frac = (pll >> QCA955X_PLL_DDR_CONFIG_NFRAC_SHIFT) & + QCA955X_PLL_DDR_CONFIG_NFRAC_MASK; + + ddr_pll = nint * ath79_ref_clk.rate / ref_div; + ddr_pll += frac * ath79_ref_clk.rate / (ref_div * (1 << 10)); + ddr_pll /= (1 << out_div); + + clk_ctrl = ath79_pll_rr(QCA955X_PLL_CLK_CTRL_REG); + + postdiv = (clk_ctrl >> QCA955X_PLL_CLK_CTRL_CPU_POST_DIV_SHIFT) & + QCA955X_PLL_CLK_CTRL_CPU_POST_DIV_MASK; + + if (clk_ctrl & QCA955X_PLL_CLK_CTRL_CPU_PLL_BYPASS) + ath79_cpu_clk.rate = ath79_ref_clk.rate; + else if (clk_ctrl & QCA955X_PLL_CLK_CTRL_CPUCLK_FROM_CPUPLL) + ath79_cpu_clk.rate = ddr_pll / (postdiv + 1); + else + ath79_cpu_clk.rate = cpu_pll / (postdiv + 1); + + postdiv = (clk_ctrl >> QCA955X_PLL_CLK_CTRL_DDR_POST_DIV_SHIFT) & + QCA955X_PLL_CLK_CTRL_DDR_POST_DIV_MASK; + + if (clk_ctrl & QCA955X_PLL_CLK_CTRL_DDR_PLL_BYPASS) + ath79_ddr_clk.rate = ath79_ref_clk.rate; + else if (clk_ctrl & QCA955X_PLL_CLK_CTRL_DDRCLK_FROM_DDRPLL) + ath79_ddr_clk.rate = cpu_pll / (postdiv + 1); + else + ath79_ddr_clk.rate = ddr_pll / (postdiv + 1); + + postdiv = (clk_ctrl >> QCA955X_PLL_CLK_CTRL_AHB_POST_DIV_SHIFT) & + QCA955X_PLL_CLK_CTRL_AHB_POST_DIV_MASK; + + if (clk_ctrl & QCA955X_PLL_CLK_CTRL_AHB_PLL_BYPASS) + ath79_ahb_clk.rate = ath79_ref_clk.rate; + else if (clk_ctrl & QCA955X_PLL_CLK_CTRL_AHBCLK_FROM_DDRPLL) + ath79_ahb_clk.rate = ddr_pll / (postdiv + 1); + else + ath79_ahb_clk.rate = cpu_pll / (postdiv + 1); + + ath79_wdt_clk.rate = ath79_ref_clk.rate; + ath79_uart_clk.rate = ath79_ref_clk.rate; +} + void __init ath79_clocks_init(void) { if (soc_is_ar71xx()) @@ -307,6 +383,8 @@ void __init ath79_clocks_init(void) ar933x_clocks_init(); else if (soc_is_ar934x()) ar934x_clocks_init(); + else if (soc_is_qca955x()) + qca955x_clocks_init(); else BUG(); |