diff options
Diffstat (limited to 'drivers/clk/imx/clk-imx6sl.c')
-rw-r--r-- | drivers/clk/imx/clk-imx6sl.c | 102 |
1 files changed, 59 insertions, 43 deletions
diff --git a/drivers/clk/imx/clk-imx6sl.c b/drivers/clk/imx/clk-imx6sl.c index f3d9dc2d2405..17e54ee16a36 100644 --- a/drivers/clk/imx/clk-imx6sl.c +++ b/drivers/clk/imx/clk-imx6sl.c @@ -7,6 +7,7 @@ * */ +#include <linux/busfreq-imx.h> #include <linux/clk.h> #include <linux/clkdev.h> #include <linux/err.h> @@ -20,6 +21,8 @@ #define CCDR 0x4 #define BM_CCM_CCDR_MMDC_CH0_MASK (1 << 17) #define CCSR 0xc +#define CCDR 0x04 +#define CCDR_CH0_HS_BYP 17 #define BM_CCSR_PLL1_SW_CLK_SEL (1 << 2) #define CACRR 0x10 #define CDHIPR 0x48 @@ -57,7 +60,7 @@ static const char *lcdif_pix_sels[] = { "pll2_bus", "pll3_usb_otg", "pll5_video_ static const char *epdc_pix_sels[] = { "pll2_bus", "pll3_usb_otg", "pll5_video_div", "pll2_pfd0", "pll2_pfd1", "pll3_pfd1", }; static const char *audio_sels[] = { "pll4_audio_div", "pll3_pfd2", "pll3_pfd3", "pll3_usb_otg", }; static const char *ecspi_sels[] = { "pll3_60m", "osc", }; -static const char *uart_sels[] = { "pll3_80m", "osc", }; +static const char *uart_sels[] = { "pll3_80m", "uart_osc_4m", }; static const char *lvds_sels[] = { "pll1_sys", "pll2_bus", "pll2_pfd0", "pll2_pfd1", "pll2_pfd2", "dummy", "pll4_audio", "pll5_video", "dummy", "enet_ref", "dummy", "dummy", "pll3_usb_otg", "pll7_usb_host", "pll3_pfd0", "pll3_pfd1", @@ -145,46 +148,39 @@ static int imx6sl_get_arm_divider_for_wait(void) } } -static void imx6sl_enable_pll_arm(bool enable) -{ - static u32 saved_pll_arm; - u32 val; - - if (enable) { - saved_pll_arm = val = readl_relaxed(anatop_base + PLL_ARM); - val |= BM_PLL_ARM_ENABLE; - val &= ~BM_PLL_ARM_POWERDOWN; - writel_relaxed(val, anatop_base + PLL_ARM); - while (!(__raw_readl(anatop_base + PLL_ARM) & BM_PLL_ARM_LOCK)) - ; - } else { - writel_relaxed(saved_pll_arm, anatop_base + PLL_ARM); - } -} - void imx6sl_set_wait_clk(bool enter) { static unsigned long saved_arm_div; + u32 val; int arm_div_for_wait = imx6sl_get_arm_divider_for_wait(); - - /* - * According to hardware design, arm podf change need - * PLL1 clock enabled. - */ - if (arm_div_for_wait == ARM_WAIT_DIV_396M) - imx6sl_enable_pll_arm(true); + int mode = get_bus_freq_mode(); if (enter) { - saved_arm_div = readl_relaxed(ccm_base + CACRR); - writel_relaxed(arm_div_for_wait, ccm_base + CACRR); + /* + * If in this mode, the IPG clock is at 12MHz, we can + * only run ARM at a max 28.8MHz, so we need to run + * from the 24MHz OSC, as there is no way to get + * 28.8MHz, when ARM is sourced from PLl1. + */ + if (mode == BUS_FREQ_LOW) { + val = readl_relaxed(ccm_base + CCSR); + val |= BM_CCSR_PLL1_SW_CLK_SEL; + writel_relaxed(val, ccm_base + CCSR); + } else { + saved_arm_div = readl_relaxed(ccm_base + CACRR); + writel_relaxed(arm_div_for_wait, ccm_base + CACRR); + } } else { - writel_relaxed(saved_arm_div, ccm_base + CACRR); + if (mode == BUS_FREQ_LOW) { + val = readl_relaxed(ccm_base + CCSR); + val &= ~BM_CCSR_PLL1_SW_CLK_SEL; + writel_relaxed(val, ccm_base + CCSR); + } else { + writel_relaxed(saved_arm_div, ccm_base + CACRR); + } } while (__raw_readl(ccm_base + CDHIPR) & BM_CDHIPR_ARM_PODF_BUSY) ; - - if (arm_div_for_wait == ARM_WAIT_DIV_396M) - imx6sl_enable_pll_arm(false); } static struct clk ** const uart_clks[] __initconst = { @@ -197,7 +193,7 @@ static void __init imx6sl_clocks_init(struct device_node *ccm_node) { struct device_node *np; void __iomem *base; - int i; + int i, reg; int ret; clks[IMX6SL_CLK_DUMMY] = imx_clk_fixed("dummy", 0); @@ -229,7 +225,7 @@ static void __init imx6sl_clocks_init(struct device_node *ccm_node) clks[IMX6SL_CLK_PLL7] = imx_clk_pllv3(IMX_PLLV3_USB, "pll7", "osc", base + 0x20, 0x3); clks[IMX6SL_PLL1_BYPASS] = imx_clk_mux_flags("pll1_bypass", base + 0x00, 16, 1, pll1_bypass_sels, ARRAY_SIZE(pll1_bypass_sels), CLK_SET_RATE_PARENT); - clks[IMX6SL_PLL2_BYPASS] = imx_clk_mux_flags("pll2_bypass", base + 0x30, 16, 1, pll2_bypass_sels, ARRAY_SIZE(pll2_bypass_sels), CLK_SET_RATE_PARENT); + clks[IMX6SL_PLL2_BYPASS] = imx_clk_mux_flags_bus("pll2_bypass", base + 0x30, 16, 1, pll2_bypass_sels, ARRAY_SIZE(pll2_bypass_sels), CLK_SET_RATE_PARENT); clks[IMX6SL_PLL3_BYPASS] = imx_clk_mux_flags("pll3_bypass", base + 0x10, 16, 1, pll3_bypass_sels, ARRAY_SIZE(pll3_bypass_sels), CLK_SET_RATE_PARENT); clks[IMX6SL_PLL4_BYPASS] = imx_clk_mux_flags("pll4_bypass", base + 0x70, 16, 1, pll4_bypass_sels, ARRAY_SIZE(pll4_bypass_sels), CLK_SET_RATE_PARENT); clks[IMX6SL_PLL5_BYPASS] = imx_clk_mux_flags("pll5_bypass", base + 0xa0, 16, 1, pll5_bypass_sels, ARRAY_SIZE(pll5_bypass_sels), CLK_SET_RATE_PARENT); @@ -245,7 +241,7 @@ static void __init imx6sl_clocks_init(struct device_node *ccm_node) clk_set_parent(clks[IMX6SL_PLL6_BYPASS], clks[IMX6SL_CLK_PLL6]); clk_set_parent(clks[IMX6SL_PLL7_BYPASS], clks[IMX6SL_CLK_PLL7]); - clks[IMX6SL_CLK_PLL1_SYS] = imx_clk_gate("pll1_sys", "pll1_bypass", base + 0x00, 13); + clks[IMX6SL_CLK_PLL1_SYS] = imx_clk_fixed_factor("pll1_sys", "pll1_bypass", 1, 1); clks[IMX6SL_CLK_PLL2_BUS] = imx_clk_gate("pll2_bus", "pll2_bypass", base + 0x30, 13); clks[IMX6SL_CLK_PLL3_USB_OTG] = imx_clk_gate("pll3_usb_otg", "pll3_bypass", base + 0x10, 13); clks[IMX6SL_CLK_PLL4_AUDIO] = imx_clk_gate("pll4_audio", "pll4_bypass", base + 0x70, 13); @@ -273,7 +269,7 @@ static void __init imx6sl_clocks_init(struct device_node *ccm_node) clks[IMX6SL_CLK_PLL4_POST_DIV] = clk_register_divider_table(NULL, "pll4_post_div", "pll4_audio", CLK_SET_RATE_PARENT, base + 0x70, 19, 2, 0, post_div_table, &imx_ccm_lock); clks[IMX6SL_CLK_PLL4_AUDIO_DIV] = clk_register_divider(NULL, "pll4_audio_div", "pll4_post_div", CLK_SET_RATE_PARENT, base + 0x170, 15, 1, 0, &imx_ccm_lock); clks[IMX6SL_CLK_PLL5_POST_DIV] = clk_register_divider_table(NULL, "pll5_post_div", "pll5_video", CLK_SET_RATE_PARENT, base + 0xa0, 19, 2, 0, post_div_table, &imx_ccm_lock); - clks[IMX6SL_CLK_PLL5_VIDEO_DIV] = clk_register_divider_table(NULL, "pll5_video_div", "pll5_post_div", CLK_SET_RATE_PARENT, base + 0x170, 30, 2, 0, video_div_table, &imx_ccm_lock); + clks[IMX6SL_CLK_PLL5_VIDEO_DIV] = clk_register_divider_table(NULL, "pll5_video_div", "pll5_post_div", CLK_SET_RATE_PARENT | CLK_SET_RATE_GATE, base + 0x170, 30, 2, 0, video_div_table, &imx_ccm_lock); clks[IMX6SL_CLK_ENET_REF] = clk_register_divider_table(NULL, "enet_ref", "pll6_enet", 0, base + 0xe0, 0, 2, 0, clk_enet_ref_table, &imx_ccm_lock); /* name parent_name reg idx */ @@ -290,6 +286,7 @@ static void __init imx6sl_clocks_init(struct device_node *ccm_node) clks[IMX6SL_CLK_PLL3_120M] = imx_clk_fixed_factor("pll3_120m", "pll3_usb_otg", 1, 4); clks[IMX6SL_CLK_PLL3_80M] = imx_clk_fixed_factor("pll3_80m", "pll3_usb_otg", 1, 6); clks[IMX6SL_CLK_PLL3_60M] = imx_clk_fixed_factor("pll3_60m", "pll3_usb_otg", 1, 8); + clks[IMX6SL_CLK_UART_OSC_4M] = imx_clk_fixed_factor("uart_osc_4m", "osc", 1, 6); np = ccm_node; base = of_iomap(np, 0); @@ -298,13 +295,13 @@ static void __init imx6sl_clocks_init(struct device_node *ccm_node) /* name reg shift width parent_names num_parents */ clks[IMX6SL_CLK_STEP] = imx_clk_mux("step", base + 0xc, 8, 1, step_sels, ARRAY_SIZE(step_sels)); - clks[IMX6SL_CLK_PLL1_SW] = imx_clk_mux("pll1_sw", base + 0xc, 2, 1, pll1_sw_sels, ARRAY_SIZE(pll1_sw_sels)); + clks[IMX6SL_CLK_PLL1_SW] = imx_clk_mux_glitchless("pll1_sw", base + 0xc, 2, 1, pll1_sw_sels, ARRAY_SIZE(pll1_sw_sels)); clks[IMX6SL_CLK_OCRAM_ALT_SEL] = imx_clk_mux("ocram_alt_sel", base + 0x14, 7, 1, ocram_alt_sels, ARRAY_SIZE(ocram_alt_sels)); clks[IMX6SL_CLK_OCRAM_SEL] = imx_clk_mux("ocram_sel", base + 0x14, 6, 1, ocram_sels, ARRAY_SIZE(ocram_sels)); - clks[IMX6SL_CLK_PRE_PERIPH2_SEL] = imx_clk_mux("pre_periph2_sel", base + 0x18, 21, 2, pre_periph_sels, ARRAY_SIZE(pre_periph_sels)); - clks[IMX6SL_CLK_PRE_PERIPH_SEL] = imx_clk_mux("pre_periph_sel", base + 0x18, 18, 2, pre_periph_sels, ARRAY_SIZE(pre_periph_sels)); - clks[IMX6SL_CLK_PERIPH2_CLK2_SEL] = imx_clk_mux("periph2_clk2_sel", base + 0x18, 20, 1, periph2_clk2_sels, ARRAY_SIZE(periph2_clk2_sels)); - clks[IMX6SL_CLK_PERIPH_CLK2_SEL] = imx_clk_mux("periph_clk2_sel", base + 0x18, 12, 2, periph_clk2_sels, ARRAY_SIZE(periph_clk2_sels)); + clks[IMX6SL_CLK_PRE_PERIPH2_SEL] = imx_clk_mux_bus("pre_periph2_sel", base + 0x18, 21, 2, pre_periph_sels, ARRAY_SIZE(pre_periph_sels)); + clks[IMX6SL_CLK_PRE_PERIPH_SEL] = imx_clk_mux_bus("pre_periph_sel", base + 0x18, 18, 2, pre_periph_sels, ARRAY_SIZE(pre_periph_sels)); + clks[IMX6SL_CLK_PERIPH2_CLK2_SEL] = imx_clk_mux_bus("periph2_clk2_sel", base + 0x18, 20, 1, periph2_clk2_sels, ARRAY_SIZE(periph2_clk2_sels)); + clks[IMX6SL_CLK_PERIPH_CLK2_SEL] = imx_clk_mux_bus("periph_clk2_sel", base + 0x18, 12, 2, periph_clk2_sels, ARRAY_SIZE(periph_clk2_sels)); clks[IMX6SL_CLK_CSI_SEL] = imx_clk_mux("csi_sel", base + 0x3c, 9, 2, csi_sels, ARRAY_SIZE(csi_sels)); clks[IMX6SL_CLK_LCDIF_AXI_SEL] = imx_clk_mux("lcdif_axi_sel", base + 0x3c, 14, 2, lcdif_axi_sels, ARRAY_SIZE(lcdif_axi_sels)); clks[IMX6SL_CLK_USDHC1_SEL] = imx_clk_fixup_mux("usdhc1_sel", base + 0x1c, 16, 1, usdhc_sels, ARRAY_SIZE(usdhc_sels), imx_cscmr1_fixup); @@ -319,8 +316,8 @@ static void __init imx6sl_clocks_init(struct device_node *ccm_node) clks[IMX6SL_CLK_EPDC_AXI_SEL] = imx_clk_mux("epdc_axi_sel", base + 0x34, 15, 3, epdc_axi_sels, ARRAY_SIZE(epdc_axi_sels)); clks[IMX6SL_CLK_GPU2D_OVG_SEL] = imx_clk_mux("gpu2d_ovg_sel", base + 0x18, 4, 2, gpu2d_ovg_sels, ARRAY_SIZE(gpu2d_ovg_sels)); clks[IMX6SL_CLK_GPU2D_SEL] = imx_clk_mux("gpu2d_sel", base + 0x18, 8, 2, gpu2d_sels, ARRAY_SIZE(gpu2d_sels)); - clks[IMX6SL_CLK_LCDIF_PIX_SEL] = imx_clk_mux("lcdif_pix_sel", base + 0x38, 6, 3, lcdif_pix_sels, ARRAY_SIZE(lcdif_pix_sels)); - clks[IMX6SL_CLK_EPDC_PIX_SEL] = imx_clk_mux("epdc_pix_sel", base + 0x38, 15, 3, epdc_pix_sels, ARRAY_SIZE(epdc_pix_sels)); + clks[IMX6SL_CLK_LCDIF_PIX_SEL] = imx_clk_mux_flags("lcdif_pix_sel", base + 0x38, 6, 3, lcdif_pix_sels, ARRAY_SIZE(lcdif_pix_sels), CLK_SET_RATE_PARENT); + clks[IMX6SL_CLK_EPDC_PIX_SEL] = imx_clk_mux_flags("epdc_pix_sel", base + 0x38, 15, 3, epdc_pix_sels, ARRAY_SIZE(epdc_pix_sels), CLK_SET_RATE_PARENT); clks[IMX6SL_CLK_SPDIF0_SEL] = imx_clk_mux("spdif0_sel", base + 0x30, 20, 2, audio_sels, ARRAY_SIZE(audio_sels)); clks[IMX6SL_CLK_SPDIF1_SEL] = imx_clk_mux("spdif1_sel", base + 0x30, 7, 2, audio_sels, ARRAY_SIZE(audio_sels)); clks[IMX6SL_CLK_EXTERN_AUDIO_SEL] = imx_clk_mux("extern_audio_sel", base + 0x20, 19, 2, audio_sels, ARRAY_SIZE(audio_sels)); @@ -332,7 +329,7 @@ static void __init imx6sl_clocks_init(struct device_node *ccm_node) clks[IMX6SL_CLK_PERIPH2] = imx_clk_busy_mux("periph2", base + 0x14, 26, 1, base + 0x48, 3, periph2_sels, ARRAY_SIZE(periph2_sels)); /* name parent_name reg shift width */ - clks[IMX6SL_CLK_OCRAM_PODF] = imx_clk_divider("ocram_podf", "ocram_sel", base + 0x14, 16, 3); + clks[IMX6SL_CLK_OCRAM_PODF] = imx_clk_busy_divider("ocram_podf", "ocram_sel", base + 0x14, 16, 3, base + 0x48, 0); clks[IMX6SL_CLK_PERIPH_CLK2_PODF] = imx_clk_divider("periph_clk2_podf", "periph_clk2_sel", base + 0x14, 27, 3); clks[IMX6SL_CLK_PERIPH2_CLK2_PODF] = imx_clk_divider("periph2_clk2_podf", "periph2_clk2_sel", base + 0x14, 0, 3); clks[IMX6SL_CLK_IPG] = imx_clk_divider("ipg", "ahb", base + 0x14, 8, 2); @@ -426,6 +423,11 @@ static void __init imx6sl_clocks_init(struct device_node *ccm_node) clk_data.clk_num = ARRAY_SIZE(clks); of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data); + /* Ensure the CH0 handshake is bypassed */ + reg = readl_relaxed(base + CCDR); + reg |= 1 << CCDR_CH0_HS_BYP; + writel_relaxed(reg, base + CCDR); + /* Ensure the AHB clk is at 132MHz. */ ret = clk_set_rate(clks[IMX6SL_CLK_AHB], 132000000); if (ret) @@ -447,6 +449,8 @@ static void __init imx6sl_clocks_init(struct device_node *ccm_node) /* Audio-related clocks configuration */ clk_set_parent(clks[IMX6SL_CLK_SPDIF0_SEL], clks[IMX6SL_CLK_PLL3_PFD3]); + /* Initialize Video PLLs to valid frequency (650MHz). */ + imx_clk_set_rate(clks[IMX6SL_CLK_PLL5_VIDEO_DIV], 650000000); /* set PLL5 video as lcdif pix parent clock */ clk_set_parent(clks[IMX6SL_CLK_LCDIF_PIX_SEL], clks[IMX6SL_CLK_PLL5_VIDEO_DIV]); @@ -454,6 +458,18 @@ static void __init imx6sl_clocks_init(struct device_node *ccm_node) clk_set_parent(clks[IMX6SL_CLK_LCDIF_AXI_SEL], clks[IMX6SL_CLK_PLL2_PFD2]); + /* Configure EPDC clocks */ + clk_set_parent(clks[IMX6SL_CLK_EPDC_PIX_SEL], + clks[IMX6SL_CLK_PLL5_VIDEO_DIV]); + clk_set_parent(clks[IMX6SL_CLK_EPDC_AXI_SEL], + clks[IMX6SL_CLK_PLL2_PFD2]); + clk_set_rate(clks[IMX6SL_CLK_EPDC_AXI], 200000000); + + /* Set the UART parent if needed */ + if (uart_from_osc) + imx_clk_set_parent(clks[IMX6SL_CLK_UART_SEL], clks[IMX6SL_CLK_UART_OSC_4M]); + imx_register_uart_clocks(uart_clks); + } CLK_OF_DECLARE(imx6sl, "fsl,imx6sl-ccm", imx6sl_clocks_init); |