diff options
Diffstat (limited to 'drivers/clk/ingenic/x1000-cgu.c')
| -rw-r--r-- | drivers/clk/ingenic/x1000-cgu.c | 123 |
1 files changed, 117 insertions, 6 deletions
diff --git a/drivers/clk/ingenic/x1000-cgu.c b/drivers/clk/ingenic/x1000-cgu.c index b22d87b3f555..453f3323cb99 100644 --- a/drivers/clk/ingenic/x1000-cgu.c +++ b/drivers/clk/ingenic/x1000-cgu.c @@ -1,13 +1,16 @@ // SPDX-License-Identifier: GPL-2.0 /* * X1000 SoC CGU driver - * Copyright (c) 2019 Zhou Yanjie <zhouyanjie@zoho.com> + * Copyright (c) 2019 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com> */ #include <linux/clk-provider.h> #include <linux/delay.h> +#include <linux/io.h> #include <linux/of.h> + #include <dt-bindings/clock/x1000-cgu.h> + #include "cgu.h" #include "pm.h" @@ -18,6 +21,9 @@ #define CGU_REG_CLKGR 0x20 #define CGU_REG_OPCR 0x24 #define CGU_REG_DDRCDR 0x2c +#define CGU_REG_USBPCR 0x3c +#define CGU_REG_USBPCR1 0x48 +#define CGU_REG_USBCDR 0x50 #define CGU_REG_MACCDR 0x54 #define CGU_REG_I2SCDR 0x60 #define CGU_REG_LPCDR 0x64 @@ -38,8 +44,47 @@ #define OPCR_SPENDN0 BIT(7) #define OPCR_SPENDN1 BIT(6) +/* bits within the USBPCR register */ +#define USBPCR_SIDDQ BIT(21) +#define USBPCR_OTG_DISABLE BIT(20) + static struct ingenic_cgu *cgu; +static int x1000_usb_phy_enable(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr = cgu->base + CGU_REG_USBPCR; + + writel(readl(reg_opcr) | OPCR_SPENDN0, reg_opcr); + writel(readl(reg_usbpcr) & ~USBPCR_OTG_DISABLE & ~USBPCR_SIDDQ, reg_usbpcr); + return 0; +} + +static void x1000_usb_phy_disable(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr = cgu->base + CGU_REG_USBPCR; + + writel(readl(reg_opcr) & ~OPCR_SPENDN0, reg_opcr); + writel(readl(reg_usbpcr) | USBPCR_OTG_DISABLE | USBPCR_SIDDQ, reg_usbpcr); +} + +static int x1000_usb_phy_is_enabled(struct clk_hw *hw) +{ + void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR; + void __iomem *reg_usbpcr = cgu->base + CGU_REG_USBPCR; + + return (readl(reg_opcr) & OPCR_SPENDN0) && + !(readl(reg_usbpcr) & USBPCR_SIDDQ) && + !(readl(reg_usbpcr) & USBPCR_OTG_DISABLE); +} + +static const struct clk_ops x1000_otg_phy_ops = { + .enable = x1000_usb_phy_enable, + .disable = x1000_usb_phy_disable, + .is_enabled = x1000_usb_phy_is_enabled, +}; + static const s8 pll_od_encoding[8] = { 0x0, 0x1, -1, 0x2, -1, -1, -1, 0x3, }; @@ -58,6 +103,7 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = { .parents = { X1000_CLK_EXCLK, -1, -1, -1 }, .pll = { .reg = CGU_REG_APLL, + .rate_multiplier = 1, .m_shift = 24, .m_bits = 7, .m_offset = 1, @@ -68,6 +114,7 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = { .od_bits = 2, .od_max = 8, .od_encoding = pll_od_encoding, + .bypass_reg = CGU_REG_APLL, .bypass_bit = 9, .enable_bit = 8, .stable_bit = 10, @@ -79,6 +126,7 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = { .parents = { X1000_CLK_EXCLK, -1, -1, -1 }, .pll = { .reg = CGU_REG_MPLL, + .rate_multiplier = 1, .m_shift = 24, .m_bits = 7, .m_offset = 1, @@ -89,12 +137,22 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = { .od_bits = 2, .od_max = 8, .od_encoding = pll_od_encoding, + .bypass_reg = CGU_REG_MPLL, .bypass_bit = 6, .enable_bit = 7, .stable_bit = 0, }, }, + + /* Custom (SoC-specific) OTG PHY */ + + [X1000_CLK_OTGPHY] = { + "otg_phy", CGU_CLK_CUSTOM, + .parents = { -1, -1, X1000_CLK_EXCLK, -1 }, + .custom = { &x1000_otg_phy_ops }, + }, + /* Muxes & dividers */ [X1000_CLK_SCLKA] = { @@ -110,9 +168,10 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = { }, [X1000_CLK_CPU] = { - "cpu", CGU_CLK_DIV, + "cpu", CGU_CLK_DIV | CGU_CLK_GATE, .parents = { X1000_CLK_CPUMUX, -1, -1, -1 }, .div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 }, + .gate = { CGU_REG_CLKGR, 30 }, }, [X1000_CLK_L2CACHE] = { @@ -141,9 +200,10 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = { }, [X1000_CLK_PCLK] = { - "pclk", CGU_CLK_DIV, + "pclk", CGU_CLK_DIV | CGU_CLK_GATE, .parents = { X1000_CLK_AHB2PMUX, -1, -1, -1 }, .div = { CGU_REG_CPCCR, 16, 1, 4, 20, -1, -1 }, + .gate = { CGU_REG_CLKGR, 28 }, }, [X1000_CLK_DDR] = { @@ -156,12 +216,20 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = { [X1000_CLK_MAC] = { "mac", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, - .parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL}, + .parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL }, .mux = { CGU_REG_MACCDR, 31, 1 }, .div = { CGU_REG_MACCDR, 0, 1, 8, 29, 28, 27 }, .gate = { CGU_REG_CLKGR, 25 }, }, + [X1000_CLK_LCD] = { + "lcd", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE, + .parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL }, + .mux = { CGU_REG_LPCDR, 31, 1 }, + .div = { CGU_REG_LPCDR, 0, 1, 8, 28, 27, 26 }, + .gate = { CGU_REG_CLKGR, 23 }, + }, + [X1000_CLK_MSCMUX] = { "msc_mux", CGU_CLK_MUX, .parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL}, @@ -182,6 +250,15 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = { .gate = { CGU_REG_CLKGR, 5 }, }, + [X1000_CLK_OTG] = { + "otg", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX, + .parents = { X1000_CLK_EXCLK, -1, + X1000_CLK_APLL, X1000_CLK_MPLL }, + .mux = { CGU_REG_USBCDR, 30, 2 }, + .div = { CGU_REG_USBCDR, 0, 1, 8, 29, 28, 27 }, + .gate = { CGU_REG_CLKGR, 3 }, + }, + [X1000_CLK_SSIPLL] = { "ssi_pll", CGU_CLK_MUX | CGU_CLK_DIV, .parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL, -1, -1 }, @@ -189,14 +266,32 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = { .div = { CGU_REG_SSICDR, 0, 1, 8, 29, 28, 27 }, }, + [X1000_CLK_SSIPLL_DIV2] = { + "ssi_pll_div2", CGU_CLK_FIXDIV, + .parents = { X1000_CLK_SSIPLL }, + .fixdiv = { 2 }, + }, + [X1000_CLK_SSIMUX] = { "ssi_mux", CGU_CLK_MUX, - .parents = { X1000_CLK_EXCLK, X1000_CLK_SSIPLL, -1, -1 }, + .parents = { X1000_CLK_EXCLK, X1000_CLK_SSIPLL_DIV2, -1, -1 }, .mux = { CGU_REG_SSICDR, 30, 1 }, }, /* Gate-only clocks */ + [X1000_CLK_EMC] = { + "emc", CGU_CLK_GATE, + .parents = { X1000_CLK_AHB2, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 0 }, + }, + + [X1000_CLK_EFUSE] = { + "efuse", CGU_CLK_GATE, + .parents = { X1000_CLK_AHB2, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 1 }, + }, + [X1000_CLK_SFC] = { "sfc", CGU_CLK_GATE, .parents = { X1000_CLK_SSIPLL, -1, -1, -1 }, @@ -239,12 +334,24 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = { .gate = { CGU_REG_CLKGR, 16 }, }, + [X1000_CLK_TCU] = { + "tcu", CGU_CLK_GATE, + .parents = { X1000_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 18 }, + }, + [X1000_CLK_SSI] = { "ssi", CGU_CLK_GATE, .parents = { X1000_CLK_SSIMUX, -1, -1, -1 }, .gate = { CGU_REG_CLKGR, 19 }, }, + [X1000_CLK_OST] = { + "ost", CGU_CLK_GATE, + .parents = { X1000_CLK_EXCLK, -1, -1, -1 }, + .gate = { CGU_REG_CLKGR, 20 }, + }, + [X1000_CLK_PDMA] = { "pdma", CGU_CLK_GATE, .parents = { X1000_CLK_EXCLK, -1, -1, -1 }, @@ -271,4 +378,8 @@ static void __init x1000_cgu_init(struct device_node *np) ingenic_cgu_register_syscore_ops(cgu); } -CLK_OF_DECLARE(x1000_cgu, "ingenic,x1000-cgu", x1000_cgu_init); +/* + * CGU has some children devices, this is useful for probing children devices + * in the case where the device node is compatible with "simple-mfd". + */ +CLK_OF_DECLARE_DRIVER(x1000_cgu, "ingenic,x1000-cgu", x1000_cgu_init); |