diff options
Diffstat (limited to 'drivers/clk/imx/clk-imx6q.c')
| -rw-r--r-- | drivers/clk/imx/clk-imx6q.c | 103 |
1 files changed, 96 insertions, 7 deletions
diff --git a/drivers/clk/imx/clk-imx6q.c b/drivers/clk/imx/clk-imx6q.c index de36f58d551c..c598f65d7c4e 100644 --- a/drivers/clk/imx/clk-imx6q.c +++ b/drivers/clk/imx/clk-imx6q.c @@ -27,7 +27,8 @@ static const char *periph_clk2_sels[] = { "pll3_usb_otg", "osc", "osc", "dummy", static const char *periph2_clk2_sels[] = { "pll3_usb_otg", "pll2_bus", }; static const char *periph_sels[] = { "periph_pre", "periph_clk2", }; static const char *periph2_sels[] = { "periph2_pre", "periph2_clk2", }; -static const char *axi_sels[] = { "periph", "pll2_pfd2_396m", "periph", "pll3_pfd1_540m", }; +static const char *axi_alt_sels[] = { "pll2_pfd2_396m", "pll3_pfd1_540m", }; +static const char *axi_sels[] = { "periph", "axi_alt_sel", }; static const char *audio_sels[] = { "pll4_audio_div", "pll3_pfd2_508m", "pll3_pfd3_454m", "pll3_usb_otg", }; static const char *gpu_axi_sels[] = { "axi", "ahb", }; static const char *pre_axi_sels[] = { "axi", "ahb", }; @@ -37,15 +38,17 @@ static const char *gpu3d_core_sels[] = { "mmdc_ch0_axi", "pll3_usb_otg", "pll2_p static const char *gpu3d_shader_sels[] = { "mmdc_ch0_axi", "pll3_usb_otg", "pll2_pfd1_594m", "pll3_pfd0_720m", }; static const char *ipu_sels[] = { "mmdc_ch0_axi", "pll2_pfd2_396m", "pll3_120m", "pll3_pfd1_540m", }; static const char *ldb_di_sels[] = { "pll5_video_div", "pll2_pfd0_352m", "pll2_pfd2_396m", "mmdc_ch1_axi", "pll3_usb_otg", }; +static const char *ldb_di0_div_sels[] = { "ldb_di0_div_3_5", "ldb_di0_div_7", }; +static const char *ldb_di1_div_sels[] = { "ldb_di1_div_3_5", "ldb_di1_div_7", }; static const char *ipu_di_pre_sels[] = { "mmdc_ch0_axi", "pll3_usb_otg", "pll5_video_div", "pll2_pfd0_352m", "pll2_pfd2_396m", "pll3_pfd1_540m", }; static const char *ipu1_di0_sels[] = { "ipu1_di0_pre", "dummy", "dummy", "ldb_di0", "ldb_di1", }; static const char *ipu1_di1_sels[] = { "ipu1_di1_pre", "dummy", "dummy", "ldb_di0", "ldb_di1", }; static const char *ipu2_di0_sels[] = { "ipu2_di0_pre", "dummy", "dummy", "ldb_di0", "ldb_di1", }; static const char *ipu2_di1_sels[] = { "ipu2_di1_pre", "dummy", "dummy", "ldb_di0", "ldb_di1", }; -static const char *ipu1_di0_sels_2[] = { "ipu1_di0_pre", "dummy", "dummy", "ldb_di0_podf", "ldb_di1_podf", }; -static const char *ipu1_di1_sels_2[] = { "ipu1_di1_pre", "dummy", "dummy", "ldb_di0_podf", "ldb_di1_podf", }; -static const char *ipu2_di0_sels_2[] = { "ipu2_di0_pre", "dummy", "dummy", "ldb_di0_podf", "ldb_di1_podf", }; -static const char *ipu2_di1_sels_2[] = { "ipu2_di1_pre", "dummy", "dummy", "ldb_di0_podf", "ldb_di1_podf", }; +static const char *ipu1_di0_sels_2[] = { "ipu1_di0_pre", "dummy", "dummy", "ldb_di0_div_sel", "ldb_di1_div_sel", }; +static const char *ipu1_di1_sels_2[] = { "ipu1_di1_pre", "dummy", "dummy", "ldb_di0_div_sel", "ldb_di1_div_sel", }; +static const char *ipu2_di0_sels_2[] = { "ipu2_di0_pre", "dummy", "dummy", "ldb_di0_div_sel", "ldb_di1_div_sel", }; +static const char *ipu2_di1_sels_2[] = { "ipu2_di1_pre", "dummy", "dummy", "ldb_di0_div_sel", "ldb_di1_div_sel", }; static const char *hsi_tx_sels[] = { "pll3_120m", "pll2_pfd2_396m", }; static const char *pcie_axi_sels[] = { "axi", "ahb", }; static const char *ssi_sels[] = { "pll3_pfd2_508m", "pll3_pfd3_454m", "pll4_audio_div", }; @@ -91,6 +94,7 @@ static const char *pll7_bypass_sels[] = { "pll7", "pll7_bypass_src", }; static struct clk_hw **hws; static struct clk_hw_onecell_data *clk_hw_data; +static void __iomem *ccm_base; static struct clk_div_table clk_enet_ref_table[] = { { .val = 0, .div = 20, }, @@ -252,6 +256,11 @@ static bool pll6_bypassed(struct device_node *node) #define CCM_CCSR 0x0c #define CCM_CS2CDR 0x2c +#define CCM_CSCDR3 0x3c +#define CCM_CCGR0 0x68 +#define CCM_CCGR3 0x74 + +#define ANATOP_PLL3_PFD 0xf0 #define CCSR_PLL3_SW_CLK_SEL BIT(0) @@ -388,6 +397,62 @@ static void init_ldb_clks(struct device_node *np, void __iomem *ccm_base) #define PFD2_CLKGATE BIT(23) #define PFD3_CLKGATE BIT(31) +/* + * workaround for ERR010579, when switching the clock source of IPU clock + * root in CCM. even setting CCGR3[CG0]=0x0 to gate off clock before + * switching, IPU may hang due to no IPU clock from CCM. + */ +static void __init init_ipu_clk(void __iomem *anatop_base) +{ + u32 val, origin_podf; + + /* gate off the IPU1_IPU clock */ + val = readl_relaxed(ccm_base + CCM_CCGR3); + val &= ~0x3; + writel_relaxed(val, ccm_base + CCM_CCGR3); + + /* gate off IPU DCIC1/2 clocks */ + val = readl_relaxed(ccm_base + CCM_CCGR0); + val &= ~(0xf << 24); + writel_relaxed(val, ccm_base + CCM_CCGR0); + + /* set IPU_PODF to 3'b000 */ + val = readl_relaxed(ccm_base + CCM_CSCDR3); + origin_podf = val & (0x7 << 11); + val &= ~(0x7 << 11); + writel_relaxed(val, ccm_base + CCM_CSCDR3); + + /* disable PLL3_PFD1 */ + val = readl_relaxed(anatop_base + ANATOP_PLL3_PFD); + val &= ~(0x1 << 15); + writel_relaxed(val, anatop_base + ANATOP_PLL3_PFD); + + /* switch IPU_SEL clock to PLL3_PFD1 */ + val = readl_relaxed(ccm_base + CCM_CSCDR3); + val |= (0x3 << 9); + writel_relaxed(val, ccm_base + CCM_CSCDR3); + + /* restore the IPU PODF*/ + val = readl_relaxed(ccm_base + CCM_CSCDR3); + val |= origin_podf; + writel_relaxed(val, ccm_base + CCM_CSCDR3); + + /* enable PLL3_PFD1 */ + val = readl_relaxed(anatop_base + ANATOP_PLL3_PFD); + val |= (0x1 << 15); + writel_relaxed(val, anatop_base + ANATOP_PLL3_PFD); + + /* enable IPU1_IPU clock */ + val = readl_relaxed(ccm_base + CCM_CCGR3); + val |= 0x3; + writel_relaxed(val, ccm_base + CCM_CCGR3); + + /* enable IPU DCIC1/2 clock */ + val = readl_relaxed(ccm_base + CCM_CCGR0); + val |= (0xf << 24); + writel_relaxed(val, ccm_base + CCM_CCGR0); +} + static void disable_anatop_clocks(void __iomem *anatop_base) { unsigned int reg; @@ -600,6 +665,7 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node) np = ccm_node; base = of_iomap(np, 0); + ccm_base = base; WARN_ON(!base); /* name reg shift width parent_names num_parents */ @@ -609,7 +675,8 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node) hws[IMX6QDL_CLK_PERIPH2_PRE] = imx_clk_hw_mux("periph2_pre", base + 0x18, 21, 2, periph_pre_sels, ARRAY_SIZE(periph_pre_sels)); hws[IMX6QDL_CLK_PERIPH_CLK2_SEL] = imx_clk_hw_mux("periph_clk2_sel", base + 0x18, 12, 2, periph_clk2_sels, ARRAY_SIZE(periph_clk2_sels)); hws[IMX6QDL_CLK_PERIPH2_CLK2_SEL] = imx_clk_hw_mux("periph2_clk2_sel", base + 0x18, 20, 1, periph2_clk2_sels, ARRAY_SIZE(periph2_clk2_sels)); - hws[IMX6QDL_CLK_AXI_SEL] = imx_clk_hw_mux("axi_sel", base + 0x14, 6, 2, axi_sels, ARRAY_SIZE(axi_sels)); + hws[IMX6QDL_CLK_AXI_ALT_SEL] = imx_clk_hw_mux("axi_alt_sel", base + 0x14, 7, 1, axi_alt_sels, ARRAY_SIZE(axi_alt_sels)); + hws[IMX6QDL_CLK_AXI_SEL] = imx_clk_hw_mux("axi_sel", base + 0x14, 6, 1, axi_sels, ARRAY_SIZE(axi_sels)); hws[IMX6QDL_CLK_ESAI_SEL] = imx_clk_hw_mux("esai_sel", base + 0x20, 19, 2, audio_sels, ARRAY_SIZE(audio_sels)); hws[IMX6QDL_CLK_ASRC_SEL] = imx_clk_hw_mux("asrc_sel", base + 0x30, 7, 2, audio_sels, ARRAY_SIZE(audio_sels)); hws[IMX6QDL_CLK_SPDIF_SEL] = imx_clk_hw_mux("spdif_sel", base + 0x30, 20, 2, audio_sels, ARRAY_SIZE(audio_sels)); @@ -655,6 +722,8 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node) hws[IMX6QDL_CLK_LDB_DI1_SEL] = imx_clk_hw_mux_ldb("ldb_di1_sel", base + 0x2c, 12, 3, ldb_di_sels, ARRAY_SIZE(ldb_di_sels)); } + hws[IMX6QDL_CLK_LDB_DI0_DIV_SEL] = imx_clk_hw_mux_flags("ldb_di0_div_sel", base + 0x20, 10, 1, ldb_di0_div_sels, ARRAY_SIZE(ldb_di0_div_sels), CLK_SET_RATE_PARENT); + hws[IMX6QDL_CLK_LDB_DI1_DIV_SEL] = imx_clk_hw_mux_flags("ldb_di1_div_sel", base + 0x20, 11, 1, ldb_di1_div_sels, ARRAY_SIZE(ldb_di1_div_sels), CLK_SET_RATE_PARENT); hws[IMX6QDL_CLK_IPU1_DI0_PRE_SEL] = imx_clk_hw_mux_flags("ipu1_di0_pre_sel", base + 0x34, 6, 3, ipu_di_pre_sels, ARRAY_SIZE(ipu_di_pre_sels), CLK_SET_RATE_PARENT); hws[IMX6QDL_CLK_IPU1_DI1_PRE_SEL] = imx_clk_hw_mux_flags("ipu1_di1_pre_sel", base + 0x34, 15, 3, ipu_di_pre_sels, ARRAY_SIZE(ipu_di_pre_sels), CLK_SET_RATE_PARENT); hws[IMX6QDL_CLK_IPU2_DI0_PRE_SEL] = imx_clk_hw_mux_flags("ipu2_di0_pre_sel", base + 0x38, 6, 3, ipu_di_pre_sels, ARRAY_SIZE(ipu_di_pre_sels), CLK_SET_RATE_PARENT); @@ -723,6 +792,8 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node) hws[IMX6QDL_CLK_UART_SERIAL_PODF] = imx_clk_hw_divider("uart_serial_podf", "uart_sel", base + 0x24, 0, 6); hws[IMX6QDL_CLK_LDB_DI0_DIV_3_5] = imx_clk_hw_fixed_factor("ldb_di0_div_3_5", "ldb_di0", 2, 7); hws[IMX6QDL_CLK_LDB_DI1_DIV_3_5] = imx_clk_hw_fixed_factor("ldb_di1_div_3_5", "ldb_di1", 2, 7); + hws[IMX6QDL_CLK_LDB_DI0_DIV_7] = imx_clk_hw_fixed_factor("ldb_di0_div_7", "ldb_di0", 1, 7); + hws[IMX6QDL_CLK_LDB_DI1_DIV_7] = imx_clk_hw_fixed_factor("ldb_di1_div_7", "ldb_di1", 1, 7); } else { hws[IMX6QDL_CLK_ECSPI_ROOT] = imx_clk_hw_divider("ecspi_root", "pll3_60m", base + 0x38, 19, 6); hws[IMX6QDL_CLK_CAN_ROOT] = imx_clk_hw_divider("can_root", "pll3_60m", base + 0x20, 2, 6); @@ -730,6 +801,8 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node) hws[IMX6QDL_CLK_UART_SERIAL_PODF] = imx_clk_hw_divider("uart_serial_podf", "pll3_80m", base + 0x24, 0, 6); hws[IMX6QDL_CLK_LDB_DI0_DIV_3_5] = imx_clk_hw_fixed_factor("ldb_di0_div_3_5", "ldb_di0_sel", 2, 7); hws[IMX6QDL_CLK_LDB_DI1_DIV_3_5] = imx_clk_hw_fixed_factor("ldb_di1_div_3_5", "ldb_di1_sel", 2, 7); + hws[IMX6QDL_CLK_LDB_DI0_DIV_7] = imx_clk_hw_fixed_factor("ldb_di0_div_7", "ldb_di0_sel", 1, 7); + hws[IMX6QDL_CLK_LDB_DI1_DIV_7] = imx_clk_hw_fixed_factor("ldb_di1_div_7", "ldb_di1_sel", 1, 7); } if (clk_on_imx6dl()) @@ -915,8 +988,24 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node) clk_hw_register_clkdev(hws[IMX6QDL_CLK_ENET_REF], "enet_ref", NULL); clk_set_rate(hws[IMX6QDL_CLK_PLL3_PFD1_540M]->clk, 540000000); - if (clk_on_imx6dl()) + if (clk_on_imx6dl()) { + init_ipu_clk(anatop_base); clk_set_parent(hws[IMX6QDL_CLK_IPU1_SEL]->clk, hws[IMX6QDL_CLK_PLL3_PFD1_540M]->clk); + clk_set_parent(hws[IMX6QDL_CLK_AXI_ALT_SEL]->clk, hws[IMX6QDL_CLK_PLL3_PFD1_540M]->clk); + clk_set_parent(hws[IMX6QDL_CLK_AXI_SEL]->clk, hws[IMX6QDL_CLK_AXI_ALT_SEL]->clk); + /* set eim_slow to 135Mhz */ + clk_set_rate(hws[IMX6QDL_CLK_EIM_SLOW]->clk, 135000000); + + /* set epdc/pxp axi clock to 200Mhz */ + clk_set_parent(hws[IMX6QDL_CLK_IPU2_SEL]->clk, hws[IMX6QDL_CLK_PLL2_PFD2_396M]->clk); + clk_set_rate(hws[IMX6QDL_CLK_IPU2]->clk, 200000000); + } else { + /* set eim_slow to 132Mhz */ + clk_set_rate(hws[IMX6QDL_CLK_EIM_SLOW]->clk, 132000000); + clk_set_parent(hws[IMX6QDL_CLK_IPU1_SEL]->clk, hws[IMX6QDL_CLK_MMDC_CH0_AXI]->clk); + + clk_set_parent(hws[IMX6QDL_CLK_IPU2_SEL]->clk, hws[IMX6QDL_CLK_MMDC_CH0_AXI]->clk); + } clk_set_parent(hws[IMX6QDL_CLK_IPU1_DI0_PRE_SEL]->clk, hws[IMX6QDL_CLK_PLL5_VIDEO_DIV]->clk); clk_set_parent(hws[IMX6QDL_CLK_IPU1_DI1_PRE_SEL]->clk, hws[IMX6QDL_CLK_PLL5_VIDEO_DIV]->clk); |