diff options
Diffstat (limited to 'drivers/clk/clk_zynqmp.c')
| -rw-r--r-- | drivers/clk/clk_zynqmp.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/clk/clk_zynqmp.c b/drivers/clk/clk_zynqmp.c index bcc62904f1..4ef8662af5 100644 --- a/drivers/clk/clk_zynqmp.c +++ b/drivers/clk/clk_zynqmp.c @@ -226,6 +226,18 @@ static u32 zynqmp_clk_get_register(enum zynqmp_clk id) return CRL_APB_CAN0_REF_CTRL; case can1_ref: return CRL_APB_CAN1_REF_CTRL; + case pl0: + return CRL_APB_PL0_REF_CTRL; + case pl1: + return CRL_APB_PL1_REF_CTRL; + case pl2: + return CRL_APB_PL2_REF_CTRL; + case pl3: + return CRL_APB_PL3_REF_CTRL; + case wdt: + return CRF_APB_TOPSW_LSBUS_CTRL; + case iopll_to_fpd: + return CRL_APB_IOPLL_TO_FPD_CTRL; default: debug("Invalid clk id%d\n", id); } @@ -278,6 +290,22 @@ static enum zynqmp_clk zynqmp_clk_get_peripheral_pll(u32 clk_ctrl) } } +static enum zynqmp_clk zynqmp_clk_get_wdt_pll(u32 clk_ctrl) +{ + u32 srcsel = (clk_ctrl & CLK_CTRL_SRCSEL_MASK) >> + CLK_CTRL_SRCSEL_SHIFT; + + switch (srcsel) { + case 2: + return iopll_to_fpd; + case 3: + return dpll; + case 0 ... 1: + default: + return apll; + } +} + static ulong zynqmp_clk_get_pll_src(ulong clk_ctrl, struct zynqmp_clk_priv *priv, bool is_pre_src) @@ -420,6 +448,49 @@ static ulong zynqmp_clk_get_peripheral_rate(struct zynqmp_clk_priv *priv, DIV_ROUND_CLOSEST(pllrate, div0), div1); } +static ulong zynqmp_clk_get_wdt_rate(struct zynqmp_clk_priv *priv, + enum zynqmp_clk id, bool two_divs) +{ + enum zynqmp_clk pll; + u32 clk_ctrl, div0; + u32 div1 = 1; + int ret; + ulong pllrate; + + ret = zynqmp_mmio_read(zynqmp_clk_get_register(id), &clk_ctrl); + if (ret) { + printf("%d %s mio read fail\n", __LINE__, __func__); + return -EIO; + } + + div0 = (clk_ctrl & CLK_CTRL_DIV0_MASK) >> CLK_CTRL_DIV0_SHIFT; + if (!div0) + div0 = 1; + + pll = zynqmp_clk_get_wdt_pll(clk_ctrl); + if (two_divs) { + ret = zynqmp_mmio_read(zynqmp_clk_get_register(pll), &clk_ctrl); + if (ret) { + printf("%d %s mio read fail\n", __LINE__, __func__); + return -EIO; + } + div1 = (clk_ctrl & CLK_CTRL_DIV0_MASK) >> CLK_CTRL_DIV0_SHIFT; + if (!div1) + div1 = 1; + } + + if (pll == iopll_to_fpd) + pll = iopll; + + pllrate = zynqmp_clk_get_pll_rate(priv, pll); + if (IS_ERR_VALUE(pllrate)) + return pllrate; + + return + DIV_ROUND_CLOSEST( + DIV_ROUND_CLOSEST(pllrate, div0), div1); +} + static unsigned long zynqmp_clk_calc_peripheral_two_divs(ulong rate, ulong pll_rate, u32 *div0, u32 *div1) @@ -510,8 +581,12 @@ static ulong zynqmp_clk_get_rate(struct clk *clk) return zynqmp_clk_get_ddr_rate(priv); case gem0_ref ... gem3_ref: case qspi_ref ... can1_ref: + case pl0 ... pl3: two_divs = true; return zynqmp_clk_get_peripheral_rate(priv, id, two_divs); + case wdt: + two_divs = true; + return zynqmp_clk_get_wdt_rate(priv, id, two_divs); default: return -ENXIO; } |