[PATCH v1 3/3] clk: mediatek: mt2712: add pll reference support
From: Weiyi Lu <hidden>
Date: 2018-09-20 09:58:09
Also in:
linux-clk, linux-mediatek, lkml
Subsystem:
common clk framework, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Linus Torvalds
For some MT2712 projects, audpll could select another reference clock source if there exists an extra Crystal Oscillators than the default clk26m XTAL. Declare with the property "mediatek,refclk-aud" to switch the audpll reference clock. And also support to modify the reference clock of all PLL with property "mediatek,refclk" instead of the default source "clk26m". Signed-off-by: Weiyi Lu <redacted> --- drivers/clk/mediatek/clk-mt2712.c | 87 ++++++++++++++++++++++++++++++--------- 1 file changed, 68 insertions(+), 19 deletions(-)
diff --git a/drivers/clk/mediatek/clk-mt2712.c b/drivers/clk/mediatek/clk-mt2712.c
index e36f4aab634d..2a4db1718089 100644
--- a/drivers/clk/mediatek/clk-mt2712.c
+++ b/drivers/clk/mediatek/clk-mt2712.c@@ -1174,7 +1174,7 @@ static const struct mtk_gate peri_clks[] = { #define PLL_B(_id, _name, _reg, _pwr_reg, _en_mask, _flags, _pcwbits, \ _pd_reg, _pd_shift, _tuner_reg, _tuner_en_reg, \ _tuner_en_bit, _pcw_reg, _pcw_shift, \ - _div_table) { \ + _div_table, _parent_name) { \ .id = _id, \ .name = _name, \ .reg = _reg, \
@@ -1192,15 +1192,17 @@ static const struct mtk_gate peri_clks[] = { .pcw_reg = _pcw_reg, \ .pcw_shift = _pcw_shift, \ .div_table = _div_table, \ + .parent_name = _parent_name, \ } #define PLL(_id, _name, _reg, _pwr_reg, _en_mask, _flags, _pcwbits, \ _pd_reg, _pd_shift, _tuner_reg, _tuner_en_reg, \ - _tuner_en_bit, _pcw_reg, _pcw_shift) \ + _tuner_en_bit, _pcw_reg, _pcw_shift, \ + _parent_name) \ PLL_B(_id, _name, _reg, _pwr_reg, _en_mask, _flags, \ _pcwbits, _pd_reg, _pd_shift, _tuner_reg, \ _tuner_en_reg, _tuner_en_bit, _pcw_reg, \ - _pcw_shift, NULL) + _pcw_shift, NULL, _parent_name) static const struct mtk_pll_div_table armca35pll_div_table[] = { { .div = 0, .freq = MT2712_PLL_FMAX },
@@ -1229,48 +1231,95 @@ static const struct mtk_pll_div_table mmpll_div_table[] = { { } /* sentinel */ }; -static const struct mtk_pll_data plls[] = { +static struct mtk_pll_data plls[] = { PLL(CLK_APMIXED_MAINPLL, "mainpll", 0x0230, 0x023C, 0xf0000101, - HAVE_RST_BAR, 31, 0x0230, 4, 0, 0, 0, 0x0234, 0), + HAVE_RST_BAR, 31, 0x0230, 4, 0, 0, 0, 0x0234, 0, "clk26m"), PLL(CLK_APMIXED_UNIVPLL, "univpll", 0x0240, 0x024C, 0xfe000101, - HAVE_RST_BAR, 31, 0x0240, 4, 0, 0, 0, 0x0244, 0), + HAVE_RST_BAR, 31, 0x0240, 4, 0, 0, 0, 0x0244, 0, "clk26m"), PLL(CLK_APMIXED_VCODECPLL, "vcodecpll", 0x0320, 0x032C, 0xc0000101, - 0, 31, 0x0320, 4, 0, 0, 0, 0x0324, 0), + 0, 31, 0x0320, 4, 0, 0, 0, 0x0324, 0, "clk26m"), PLL(CLK_APMIXED_VENCPLL, "vencpll", 0x0280, 0x028C, 0x00000101, - 0, 31, 0x0280, 4, 0, 0, 0, 0x0284, 0), + 0, 31, 0x0280, 4, 0, 0, 0, 0x0284, 0, "clk26m"), PLL(CLK_APMIXED_APLL1, "apll1", 0x0330, 0x0340, 0x00000101, - 0, 31, 0x0330, 4, 0x0338, 0x0014, 0, 0x0334, 0), + 0, 31, 0x0330, 4, 0x0338, 0x0014, 0, 0x0334, 0, "clk26m"), PLL(CLK_APMIXED_APLL2, "apll2", 0x0350, 0x0360, 0x00000101, - 0, 31, 0x0350, 4, 0x0358, 0x0014, 1, 0x0354, 0), + 0, 31, 0x0350, 4, 0x0358, 0x0014, 1, 0x0354, 0, "clk26m"), PLL(CLK_APMIXED_LVDSPLL, "lvdspll", 0x0370, 0x037c, 0x00000101, - 0, 31, 0x0370, 4, 0, 0, 0, 0x0374, 0), + 0, 31, 0x0370, 4, 0, 0, 0, 0x0374, 0, "clk26m"), PLL(CLK_APMIXED_LVDSPLL2, "lvdspll2", 0x0390, 0x039C, 0x00000101, - 0, 31, 0x0390, 4, 0, 0, 0, 0x0394, 0), + 0, 31, 0x0390, 4, 0, 0, 0, 0x0394, 0, "clk26m"), PLL(CLK_APMIXED_MSDCPLL, "msdcpll", 0x0270, 0x027C, 0x00000101, - 0, 31, 0x0270, 4, 0, 0, 0, 0x0274, 0), + 0, 31, 0x0270, 4, 0, 0, 0, 0x0274, 0, "clk26m"), PLL(CLK_APMIXED_MSDCPLL2, "msdcpll2", 0x0410, 0x041C, 0x00000101, - 0, 31, 0x0410, 4, 0, 0, 0, 0x0414, 0), + 0, 31, 0x0410, 4, 0, 0, 0, 0x0414, 0, "clk26m"), PLL(CLK_APMIXED_TVDPLL, "tvdpll", 0x0290, 0x029C, 0xc0000101, - 0, 31, 0x0290, 4, 0, 0, 0, 0x0294, 0), + 0, 31, 0x0290, 4, 0, 0, 0, 0x0294, 0, "clk26m"), PLL_B(CLK_APMIXED_MMPLL, "mmpll", 0x0250, 0x0260, 0x00000101, 0, 31, 0x0250, 4, 0, 0, 0, 0x0254, 0, - mmpll_div_table), + mmpll_div_table, "clk26m"), PLL_B(CLK_APMIXED_ARMCA35PLL, "armca35pll", 0x0100, 0x0110, 0xf0000101, HAVE_RST_BAR, 31, 0x0100, 4, 0, 0, 0, 0x0104, 0, - armca35pll_div_table), + armca35pll_div_table, "clk26m"), PLL_B(CLK_APMIXED_ARMCA72PLL, "armca72pll", 0x0210, 0x0220, 0x00000101, 0, 31, 0x0210, 4, 0, 0, 0, 0x0214, 0, - armca72pll_div_table), + armca72pll_div_table, "clk26m"), PLL(CLK_APMIXED_ETHERPLL, "etherpll", 0x0300, 0x030C, 0xc0000101, - 0, 31, 0x0300, 4, 0, 0, 0, 0x0304, 0), + 0, 31, 0x0300, 4, 0, 0, 0, 0x0304, 0, "clk26m"), }; +static void clk_mt2712_set_pll_reference(struct device_node *node, + struct mtk_pll_data *plls, size_t num_plls) +{ + void __iomem *base, *sel_addr; + struct of_phandle_args refclk, refclk_aud; + const char *refclk_name = "clk26m"; + const char *refclk_aud_name; + int rc; + size_t i; + u32 r; + + base = of_iomap(node, 0); + if (base) { + sel_addr = base + 0x40; + } else { + pr_err("%s(): ioremap failed\n", __func__); + return; + } + + rc = of_parse_phandle_with_args(node, "mediatek,refclk", + "#clock-cells", 0, &refclk); + if (!rc) { + of_property_read_string(refclk.np, "clock-output-names", + &refclk_name); + for (i = 0; i < num_plls; i++) + plls[i].parent_name = refclk_name; + } + + rc = of_parse_phandle_with_args(node, "mediatek,refclk-aud", + "#clock-cells", 0, &refclk_aud); + if (!rc) { + of_property_read_string(refclk_aud.np, "clock-output-names", + &refclk_aud_name); + if (strcmp(refclk_name, refclk_aud_name)) { + plls[CLK_APMIXED_APLL1].parent_name = refclk_aud_name; + plls[CLK_APMIXED_APLL2].parent_name = refclk_aud_name; + r = readl(sel_addr) | 0x60000; + } else { + r = readl(sel_addr) & ~0x60000; + } + + writel(r, sel_addr); + } +} + static int clk_mt2712_apmixed_probe(struct platform_device *pdev) { struct clk_onecell_data *clk_data; int r; struct device_node *node = pdev->dev.of_node; + clk_mt2712_set_pll_reference(node, plls, ARRAY_SIZE(plls)); + clk_data = mtk_alloc_clk_data(CLK_APMIXED_NR_CLK); mtk_clk_register_plls(node, plls, ARRAY_SIZE(plls), clk_data);
--
2.12.5.2.gbdf23ab