Am Mittwoch, den 06.08.2014, 16:35 +0800 schrieb Shengjiu Wang: > anaclk1 and anaclk2 is the clock source for lvds1_in and lvds2_in. lvds1_in > and lvds2_in can be used to provide external clock source to the internal > pll, such as pll4_audio and pll5_video. > pll4_audio and pll5_video can have multiple source, not only "osc", so > add them. > > Signed-off-by: Nicolin Chen <[email protected]> > Signed-off-by: Shengjiu Wang <[email protected]> > --- > arch/arm/mach-imx/clk-imx6q.c | 12 ++++++++++-- > include/dt-bindings/clock/imx6qdl-clock.h | 8 +++++++- > 2 files changed, 17 insertions(+), 3 deletions(-) > > diff --git a/arch/arm/mach-imx/clk-imx6q.c b/arch/arm/mach-imx/clk-imx6q.c > index 1d6dd59..330aad3 100644 > --- a/arch/arm/mach-imx/clk-imx6q.c > +++ b/arch/arm/mach-imx/clk-imx6q.c > @@ -73,6 +73,7 @@ static const char *lvds_sels[] = { > "pll4_audio", "pll5_video", "pll8_mlb", "enet_ref", > "pcie_ref_125m", "sata_ref_100m", > }; > +static const char *pll_av_sels[] = { "osc", "lvds1_in", "lvds2_in", "dummy", > }; > > static struct clk *clk[IMX6QDL_CLK_END]; > static struct clk_onecell_data clk_data; > @@ -119,6 +120,9 @@ static void __init imx6q_clocks_init(struct device_node > *ccm_node) > clk[IMX6QDL_CLK_CKIL] = imx_obtain_fixed_clock("ckil", 0); > clk[IMX6QDL_CLK_CKIH] = imx_obtain_fixed_clock("ckih1", 0); > clk[IMX6QDL_CLK_OSC] = imx_obtain_fixed_clock("osc", 0); > + /* Clock source from external clock via ANACLK1/2 PADs */ > + clk[IMX6QDL_CLK_ANACLK1] = imx_obtain_fixed_clock("anaclk1", 0); > + clk[IMX6QDL_CLK_ANACLK2] = imx_obtain_fixed_clock("anaclk2", 0); > > np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-anatop"); > base = of_iomap(np, 0); > @@ -136,8 +140,8 @@ static void __init imx6q_clocks_init(struct device_node > *ccm_node) > clk[IMX6QDL_CLK_PLL1_SYS] = imx_clk_pllv3(IMX_PLLV3_SYS, > "pll1_sys", "osc", base, 0x7f); > clk[IMX6QDL_CLK_PLL2_BUS] = imx_clk_pllv3(IMX_PLLV3_GENERIC, > "pll2_bus", "osc", base + 0x30, 0x1); > clk[IMX6QDL_CLK_PLL3_USB_OTG] = imx_clk_pllv3(IMX_PLLV3_USB, > "pll3_usb_otg", "osc", base + 0x10, 0x3); > - clk[IMX6QDL_CLK_PLL4_AUDIO] = imx_clk_pllv3(IMX_PLLV3_AV, > "pll4_audio", "osc", base + 0x70, 0x7f); > - clk[IMX6QDL_CLK_PLL5_VIDEO] = imx_clk_pllv3(IMX_PLLV3_AV, > "pll5_video", "osc", base + 0xa0, 0x7f); > + clk[IMX6QDL_CLK_PLL4_AUDIO] = imx_clk_pllv3(IMX_PLLV3_AV, > "pll4_audio", "pll4_sel", base + 0x70, 0x7f); > + clk[IMX6QDL_CLK_PLL5_VIDEO] = imx_clk_pllv3(IMX_PLLV3_AV, > "pll5_video", "pll5_sel", base + 0xa0, 0x7f); > clk[IMX6QDL_CLK_PLL6_ENET] = imx_clk_pllv3(IMX_PLLV3_ENET, > "pll6_enet", "osc", base + 0xe0, 0x3); > clk[IMX6QDL_CLK_PLL7_USB_HOST] = imx_clk_pllv3(IMX_PLLV3_USB, > "pll7_usb_host","osc", base + 0x20, 0x3); > > @@ -169,6 +173,8 @@ static void __init imx6q_clocks_init(struct device_node > *ccm_node) > > clk[IMX6QDL_CLK_LVDS1_SEL] = imx_clk_mux("lvds1_sel", base + 0x160, 0, > 5, lvds_sels, ARRAY_SIZE(lvds_sels)); > clk[IMX6QDL_CLK_LVDS2_SEL] = imx_clk_mux("lvds2_sel", base + 0x160, 5, > 5, lvds_sels, ARRAY_SIZE(lvds_sels)); > + clk[IMX6QDL_CLK_PLL4_SEL] = imx_clk_mux("pll4_sel", base + 0x70, 14, > 2, pll_av_sels, ARRAY_SIZE(pll_av_sels)); > + clk[IMX6QDL_CLK_PLL5_SEL] = imx_clk_mux("pll5_sel", base + 0xa0, 14, > 2, pll_av_sels, ARRAY_SIZE(pll_av_sels)); > > /* > * lvds1_gate and lvds2_gate are pseudo-gates. Both can be > @@ -178,6 +184,8 @@ static void __init imx6q_clocks_init(struct device_node > *ccm_node) > */ > clk[IMX6QDL_CLK_LVDS1_GATE] = imx_clk_gate("lvds1_gate", "lvds1_sel", > base + 0x160, 10); > clk[IMX6QDL_CLK_LVDS2_GATE] = imx_clk_gate("lvds2_gate", "lvds2_sel", > base + 0x160, 11); > + clk[IMX6QDL_CLK_LVDS1_IN] = imx_clk_gate("lvds1_in", "anaclk1", base + > 0x160, 12); > + clk[IMX6QDL_CLK_LVDS2_IN] = imx_clk_gate("lvds2_in", "anaclk2", base + > 0x160, 13); > I think we need something more clever here. With both lvds in and out modeled as a clock gate it is possible for the user to enable both at the same time. The reference manual on the contrary states that both states are mutually exclusive: "Do not enable input and output buffers simultaneously".
Regards, Lucas -- Pengutronix e.K. | Lucas Stach | Industrial Linux Solutions | http://www.pengutronix.de/ | -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
