diff options
Diffstat (limited to 'drivers/clk/ingenic/jz4770-cgu.c')
| -rw-r--r-- | drivers/clk/ingenic/jz4770-cgu.c | 454 |
1 files changed, 454 insertions, 0 deletions
diff --git a/drivers/clk/ingenic/jz4770-cgu.c b/drivers/clk/ingenic/jz4770-cgu.c new file mode 100644 index 000000000..e3057bb5f --- /dev/null +++ b/drivers/clk/ingenic/jz4770-cgu.c @@ -0,0 +1,454 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * JZ4770 SoC CGU driver + * Copyright 2018, Paul Cercueil <paul@crapouillou.net> + */ + +#include <linux/bitops.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/of.h> +#include <linux/syscore_ops.h> +#include <dt-bindings/clock/jz4770-cgu.h> +#include "cgu.h" + +/* + * CPM registers offset address definition + */ +#define CGU_REG_CPCCR 0x00 +#define CGU_REG_LCR 0x04 +#define CGU_REG_CPPCR0 0x10 +#define CGU_REG_CLKGR0 0x20 +#define CGU_REG_OPCR 0x24 +#define CGU_REG_CLKGR1 0x28 +#define CGU_REG_CPPCR1 0x30 +#define CGU_REG_USBPCR1 0x48 +#define CGU_REG_USBCDR 0x50 +#define CGU_REG_I2SCDR 0x60 +#define CGU_REG_LPCDR 0x64 +#define CGU_REG_MSC0CDR 0x68 +#define CGU_REG_UHCCDR 0x6c +#define CGU_REG_SSICDR 0x74 +#define CGU_REG_CIMCDR 0x7c +#define CGU_REG_GPSCDR 0x80 +#define CGU_REG_PCMCDR 0x84 +#define CGU_REG_GPUCDR 0x88 +#define CGU_REG_MSC1CDR 0xA4 +#define CGU_REG_MSC2CDR 0xA8 +#define CGU_REG_BCHCDR 0xAC + +/* bits within the LCR register */ +#define LCR_LPM BIT(0) /* Low Power Mode */ + +/* bits within the OPCR register */ +#define OPCR_SPENDH BIT(5) /* UHC PHY suspend */ + +/* bits within the USBPCR1 register */ +#define USBPCR1_UHC_POWER BIT(5) /* UHC PHY power down */ + +static struct ingenic_cgu *cgu; + +static int jz4770_uhc_phy_enable(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr1 = cgu->base + CGU_REG_USBPCR1; + + writel(readl(reg_opcr) & ~OPCR_SPENDH, reg_opcr); + writel(readl(reg_usbpcr1) | USBPCR1_UHC_POWER, reg_usbpcr1); + return 0; +} + +static void jz4770_uhc_phy_disable(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr1 = cgu->base + CGU_REG_USBPCR1; + + writel(readl(reg_usbpcr1) & ~USBPCR1_UHC_POWER, reg_usbpcr1); + writel(readl(reg_opcr) | OPCR_SPENDH, reg_opcr); +} + +static int jz4770_uhc_phy_is_enabled(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr1 = cgu->base + CGU_REG_USBPCR1; + + return !(readl(reg_opcr) & OPCR_SPENDH) && + (readl(reg_usbpcr1) & USBPCR1_UHC_POWER); +} + +static const struct clk_ops jz4770_uhc_phy_ops = { + .enable = jz4770_uhc_phy_enable, + .disable = jz4770_uhc_phy_disable, + .is_enabled = jz4770_uhc_phy_is_enabled, +}; + +static const s8 pll_od_encoding[8] = { + 0x0, 0x1, -1, 0x2, -1, -1, -1, 0x3, +}; + +static const struct ingenic_cgu_clk_info jz4770_cgu_clocks[] = { + + /* External clocks */ + + [JZ4770_CLK_EXT] = { "ext", CGU_CLK_EXT }, + [JZ4770_CLK_OSC32K] = { "osc32k", CGU_CLK_EXT }, + + /* PLLs */ + + [JZ4770_CLK_PLL0] = { + "pll0", CGU_CLK_PLL, + .parents = { JZ4770_CLK_EXT }, + .pll = { + .reg = CGU_REG_CPPCR0, + .m_shift = 24, + .m_bits = 7, + .m_offset = 1, + .n_shift = 18, + .n_bits = 5, + .n_offset = 1, + .od_shift = 16, + .od_bits = 2, + .od_max = 8, + .od_encoding = pll_od_encoding, + .bypass_bit = 9, + .enable_bit = 8, + .stable_bit = 10, + }, + }, + + [JZ4770_CLK_PLL1] = { + /* TODO: PLL1 can depend on PLL0 */ + "pll1", CGU_CLK_PLL, + .parents = { JZ4770_CLK_EXT }, + .pll = { + .reg = CGU_REG_CPPCR1, + .m_shift = 24, + .m_bits = 7, + .m_offset = 1, + .n_shift = 18, + .n_bits = 5, + .n_offset = 1, + .od_shift = 16, + .od_bits = 2, + .od_max = 8, + .od_encoding = pll_od_encoding, + .enable_bit = 7, + .stable_bit = 6, + .no_bypass_bit = true, + }, + }, + + /* Main clocks */ + + [JZ4770_CLK_CCLK] = { + "cclk", CGU_CLK_DIV, + .parents = { JZ4770_CLK_PLL0, }, + .div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 }, + }, + [JZ4770_CLK_H0CLK] = { + "h0clk", CGU_CLK_DIV, + .parents = { JZ4770_CLK_PLL0, }, + .div = { CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1 }, + }, + [JZ4770_CLK_H1CLK] = { + "h1clk", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4770_CLK_PLL0, }, + .div = { CGU_REG_CPCCR, 24, 1, 4, 22, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 7 }, + }, + [JZ4770_CLK_H2CLK] = { + "h2clk", CGU_CLK_DIV, + .parents = { JZ4770_CLK_PLL0, }, + .div = { CGU_REG_CPCCR, 16, 1, 4, 22, -1, -1 }, + }, + [JZ4770_CLK_C1CLK] = { + "c1clk", CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { JZ4770_CLK_PLL0, }, + .div = { CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1 }, + .gate = { CGU_REG_OPCR, 31, true }, // disable CCLK stop on idle + }, + [JZ4770_CLK_PCLK] = { + "pclk", CGU_CLK_DIV, + .parents = { JZ4770_CLK_PLL0, }, + .div = { CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1 }, + }, + + /* Those divided clocks can connect to PLL0 or PLL1 */ + + [JZ4770_CLK_MMC0_MUX] = { + "mmc0_mux", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_MSC0CDR, 30, 1 }, + .div = { CGU_REG_MSC0CDR, 0, 1, 7, -1, -1, 31 }, + .gate = { CGU_REG_MSC0CDR, 31 }, + }, + [JZ4770_CLK_MMC1_MUX] = { + "mmc1_mux", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_MSC1CDR, 30, 1 }, + .div = { CGU_REG_MSC1CDR, 0, 1, 7, -1, -1, 31 }, + .gate = { CGU_REG_MSC1CDR, 31 }, + }, + [JZ4770_CLK_MMC2_MUX] = { + "mmc2_mux", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_MSC2CDR, 30, 1 }, + .div = { CGU_REG_MSC2CDR, 0, 1, 7, -1, -1, 31 }, + .gate = { CGU_REG_MSC2CDR, 31 }, + }, + [JZ4770_CLK_CIM] = { + "cim", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_CIMCDR, 31, 1 }, + .div = { CGU_REG_CIMCDR, 0, 1, 8, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 26 }, + }, + [JZ4770_CLK_UHC] = { + "uhc", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_UHCCDR, 29, 1 }, + .div = { CGU_REG_UHCCDR, 0, 1, 4, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 24 }, + }, + [JZ4770_CLK_GPU] = { + "gpu", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, -1 }, + .mux = { CGU_REG_GPUCDR, 31, 1 }, + .div = { CGU_REG_GPUCDR, 0, 1, 3, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 9 }, + }, + [JZ4770_CLK_BCH] = { + "bch", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_BCHCDR, 31, 1 }, + .div = { CGU_REG_BCHCDR, 0, 1, 3, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 1 }, + }, + [JZ4770_CLK_LPCLK_MUX] = { + "lpclk", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_LPCDR, 29, 1 }, + .div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 28 }, + }, + [JZ4770_CLK_GPS] = { + "gps", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_PLL0, JZ4770_CLK_PLL1, }, + .mux = { CGU_REG_GPSCDR, 31, 1 }, + .div = { CGU_REG_GPSCDR, 0, 1, 4, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 22 }, + }, + + /* Those divided clocks can connect to EXT, PLL0 or PLL1 */ + + [JZ4770_CLK_SSI_MUX] = { + "ssi_mux", CGU_CLK_DIV | CGU_CLK_MUX, + .parents = { JZ4770_CLK_EXT, -1, + JZ4770_CLK_PLL0, JZ4770_CLK_PLL1 }, + .mux = { CGU_REG_SSICDR, 30, 2 }, + .div = { CGU_REG_SSICDR, 0, 1, 6, -1, -1, -1 }, + }, + [JZ4770_CLK_PCM_MUX] = { + "pcm_mux", CGU_CLK_DIV | CGU_CLK_MUX, + .parents = { JZ4770_CLK_EXT, -1, + JZ4770_CLK_PLL0, JZ4770_CLK_PLL1 }, + .mux = { CGU_REG_PCMCDR, 30, 2 }, + .div = { CGU_REG_PCMCDR, 0, 1, 9, -1, -1, -1 }, + }, + [JZ4770_CLK_I2S] = { + "i2s", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_EXT, -1, + JZ4770_CLK_PLL0, JZ4770_CLK_PLL1 }, + .mux = { CGU_REG_I2SCDR, 30, 2 }, + .div = { CGU_REG_I2SCDR, 0, 1, 9, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR1, 13 }, + }, + [JZ4770_CLK_OTG] = { + "usb", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { JZ4770_CLK_EXT, -1, + JZ4770_CLK_PLL0, JZ4770_CLK_PLL1 }, + .mux = { CGU_REG_USBCDR, 30, 2 }, + .div = { CGU_REG_USBCDR, 0, 1, 8, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR0, 2 }, + }, + + /* Gate-only clocks */ + + [JZ4770_CLK_SSI0] = { + "ssi0", CGU_CLK_GATE, + .parents = { JZ4770_CLK_SSI_MUX, }, + .gate = { CGU_REG_CLKGR0, 4 }, + }, + [JZ4770_CLK_SSI1] = { + "ssi1", CGU_CLK_GATE, + .parents = { JZ4770_CLK_SSI_MUX, }, + .gate = { CGU_REG_CLKGR0, 19 }, + }, + [JZ4770_CLK_SSI2] = { + "ssi2", CGU_CLK_GATE, + .parents = { JZ4770_CLK_SSI_MUX, }, + .gate = { CGU_REG_CLKGR0, 20 }, + }, + [JZ4770_CLK_PCM0] = { + "pcm0", CGU_CLK_GATE, + .parents = { JZ4770_CLK_PCM_MUX, }, + .gate = { CGU_REG_CLKGR1, 8 }, + }, + [JZ4770_CLK_PCM1] = { + "pcm1", CGU_CLK_GATE, + .parents = { JZ4770_CLK_PCM_MUX, }, + .gate = { CGU_REG_CLKGR1, 10 }, + }, + [JZ4770_CLK_DMA] = { + "dma", CGU_CLK_GATE, + .parents = { JZ4770_CLK_H2CLK, }, + .gate = { CGU_REG_CLKGR0, 21 }, + }, + [JZ4770_CLK_I2C0] = { + "i2c0", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 5 }, + }, + [JZ4770_CLK_I2C1] = { + "i2c1", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 6 }, + }, + [JZ4770_CLK_I2C2] = { + "i2c2", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR1, 15 }, + }, + [JZ4770_CLK_UART0] = { + "uart0", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 15 }, + }, + [JZ4770_CLK_UART1] = { + "uart1", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 16 }, + }, + [JZ4770_CLK_UART2] = { + "uart2", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 17 }, + }, + [JZ4770_CLK_UART3] = { + "uart3", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 18 }, + }, + [JZ4770_CLK_IPU] = { + "ipu", CGU_CLK_GATE, + .parents = { JZ4770_CLK_H0CLK, }, + .gate = { CGU_REG_CLKGR0, 29 }, + }, + [JZ4770_CLK_ADC] = { + "adc", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 14 }, + }, + [JZ4770_CLK_AIC] = { + "aic", CGU_CLK_GATE, + .parents = { JZ4770_CLK_EXT, }, + .gate = { CGU_REG_CLKGR0, 8 }, + }, + [JZ4770_CLK_AUX] = { + "aux", CGU_CLK_GATE, + .parents = { JZ4770_CLK_C1CLK, }, + .gate = { CGU_REG_CLKGR1, 14 }, + }, + [JZ4770_CLK_VPU] = { + "vpu", CGU_CLK_GATE, + .parents = { JZ4770_CLK_H1CLK, }, + .gate = { CGU_REG_LCR, 30, false, 150 }, + }, + [JZ4770_CLK_MMC0] = { + "mmc0", CGU_CLK_GATE, + .parents = { JZ4770_CLK_MMC0_MUX, }, + .gate = { CGU_REG_CLKGR0, 3 }, + }, + [JZ4770_CLK_MMC1] = { + "mmc1", CGU_CLK_GATE, + .parents = { JZ4770_CLK_MMC1_MUX, }, + .gate = { CGU_REG_CLKGR0, 11 }, + }, + [JZ4770_CLK_MMC2] = { + "mmc2", CGU_CLK_GATE, + .parents = { JZ4770_CLK_MMC2_MUX, }, + .gate = { CGU_REG_CLKGR0, 12 }, + }, + [JZ4770_CLK_OTG_PHY] = { + "usb_phy", CGU_CLK_GATE, + .parents = { JZ4770_CLK_OTG }, + .gate = { CGU_REG_OPCR, 7, true, 50 }, + }, + + /* Custom clocks */ + + [JZ4770_CLK_UHC_PHY] = { + "uhc_phy", CGU_CLK_CUSTOM, + .parents = { JZ4770_CLK_UHC, -1, -1, -1 }, + .custom = { &jz4770_uhc_phy_ops }, + }, + + [JZ4770_CLK_EXT512] = { + "ext/512", CGU_CLK_FIXDIV, + .parents = { JZ4770_CLK_EXT }, + .fixdiv = { 512 }, + }, + + [JZ4770_CLK_RTC] = { + "rtc", CGU_CLK_MUX, + .parents = { JZ4770_CLK_EXT512, JZ4770_CLK_OSC32K, }, + .mux = { CGU_REG_OPCR, 2, 1}, + }, +}; + +#if IS_ENABLED(CONFIG_PM_SLEEP) +static int jz4770_cgu_pm_suspend(void) +{ + u32 val; + + val = readl(cgu->base + CGU_REG_LCR); + writel(val | LCR_LPM, cgu->base + CGU_REG_LCR); + return 0; +} + +static void jz4770_cgu_pm_resume(void) +{ + u32 val; + + val = readl(cgu->base + CGU_REG_LCR); + writel(val & ~LCR_LPM, cgu->base + CGU_REG_LCR); +} + +static struct syscore_ops jz4770_cgu_pm_ops = { + .suspend = jz4770_cgu_pm_suspend, + .resume = jz4770_cgu_pm_resume, +}; +#endif /* CONFIG_PM_SLEEP */ + +static void __init jz4770_cgu_init(struct device_node *np) +{ + int retval; + + cgu = ingenic_cgu_new(jz4770_cgu_clocks, + ARRAY_SIZE(jz4770_cgu_clocks), np); + if (!cgu) { + pr_err("%s: failed to initialise CGU\n", __func__); + return; + } + + retval = ingenic_cgu_register_clocks(cgu); + if (retval) + pr_err("%s: failed to register CGU Clocks\n", __func__); + +#if IS_ENABLED(CONFIG_PM_SLEEP) + register_syscore_ops(&jz4770_cgu_pm_ops); +#endif +} + +/* We only probe via devicetree, no need for a platform driver */ +CLK_OF_DECLARE(jz4770_cgu, "ingenic,jz4770-cgu", jz4770_cgu_init); |