From: David Lechner <david@lechnology.com> To: nsekhar@ti.com, khilman@kernel.org Cc: David Lechner <david@lechnology.com>, petr@barix.com, sergei.shtylyov@cogentembedded.com, Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>, Mark Rutland <mark.rutland@arm.com>, Ian Campbell <ijc+devicetree@hellion.org.uk>, Kumar Gala <galak@codeaurora.org>, Kishon Vijay Abraham I <kishon@ti.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Alan Stern <stern@rowland.harvard.edu>, Bin Liu <b-liu@ti.com>, Lee Jones <lee.jones@linaro.org>, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Subject: [PATCH v5 1/5] ARM: davinci: da8xx: add usb phy clocks Date: Mon, 9 May 2016 18:46:48 -0500 [thread overview] Message-ID: <1462837612-7803-2-git-send-email-david@lechnology.com> (raw) In-Reply-To: <1462837612-7803-1-git-send-email-david@lechnology.com> Up to this point, the USB phy clock configuration was handled manually in the board files and in the usb drivers. This adds proper clocks so that the usb drivers can use clk_get and clk_enable and not have to worry about the details. Also, the related code is removed from the board files and replaced with the new clock registration functions. Signed-off-by: David Lechner <david@lechnology.com> --- arch/arm/mach-davinci/board-da830-evm.c | 22 ++- arch/arm/mach-davinci/board-omapl138-hawk.c | 16 +- arch/arm/mach-davinci/include/mach/da8xx.h | 3 + arch/arm/mach-davinci/usb-da8xx.c | 219 +++++++++++++++++++++++++++- 4 files changed, 239 insertions(+), 21 deletions(-) diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c index 3d8cf8c..605d444 100644 --- a/arch/arm/mach-davinci/board-da830-evm.c +++ b/arch/arm/mach-davinci/board-da830-evm.c @@ -115,18 +115,6 @@ static __init void da830_evm_usb_init(void) */ cfgchip2 = __raw_readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); - /* USB2.0 PHY reference clock is 24 MHz */ - cfgchip2 &= ~CFGCHIP2_REFFREQ; - cfgchip2 |= CFGCHIP2_REFFREQ_24MHZ; - - /* - * Select internal reference clock for USB 2.0 PHY - * and use it as a clock source for USB 1.1 PHY - * (this is the default setting anyway). - */ - cfgchip2 &= ~CFGCHIP2_USB1PHYCLKMUX; - cfgchip2 |= CFGCHIP2_USB2PHYCLKMUX; - /* * We have to override VBUS/ID signals when MUSB is configured into the * host-only mode -- ID pin will float if no cable is connected, so the @@ -143,6 +131,16 @@ static __init void da830_evm_usb_init(void) __raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); /* USB_REFCLKIN is not used. */ + ret = da8xx_register_usb20_phy_clk(false); + if (ret) + pr_warn("%s: USB 2.0 PHY CLK registration failed: %d\n", + __func__, ret); + + ret = da8xx_register_usb11_phy_clk(false); + if (ret) + pr_warn("%s: USB 1.1 PHY CLK registration failed: %d\n", + __func__, ret); + ret = davinci_cfg_reg(DA830_USB0_DRVVBUS); if (ret) pr_warn("%s: USB 2.0 PinMux setup failed: %d\n", __func__, ret); diff --git a/arch/arm/mach-davinci/board-omapl138-hawk.c b/arch/arm/mach-davinci/board-omapl138-hawk.c index ee62486..d4930b6 100644 --- a/arch/arm/mach-davinci/board-omapl138-hawk.c +++ b/arch/arm/mach-davinci/board-omapl138-hawk.c @@ -243,7 +243,6 @@ static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id) static __init void omapl138_hawk_usb_init(void) { int ret; - u32 cfgchip2; ret = davinci_cfg_reg_list(da850_hawk_usb11_pins); if (ret) { @@ -251,12 +250,15 @@ static __init void omapl138_hawk_usb_init(void) return; } - /* Setup the Ref. clock frequency for the HAWK at 24 MHz. */ - - cfgchip2 = __raw_readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); - cfgchip2 &= ~CFGCHIP2_REFFREQ; - cfgchip2 |= CFGCHIP2_REFFREQ_24MHZ; - __raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + /* USB_REFCLKIN is not used. */ + ret = da8xx_register_usb20_phy_clk(false); + if (ret) + pr_warn("%s: USB 2.0 PHY CLK registration failed: %d\n", + __func__, ret); + ret = da8xx_register_usb11_phy_clk(false); + if (ret) + pr_warn("%s: USB 1.1 PHY CLK registration failed: %d\n", + __func__, ret); ret = gpio_request_one(DA850_USB1_VBUS_PIN, GPIOF_DIR_OUT, "USB1 VBUS"); diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h b/arch/arm/mach-davinci/include/mach/da8xx.h index f9f9713..c367530 100644 --- a/arch/arm/mach-davinci/include/mach/da8xx.h +++ b/arch/arm/mach-davinci/include/mach/da8xx.h @@ -88,6 +88,9 @@ int da850_register_edma(struct edma_rsv_info *rsv[2]); int da8xx_register_i2c(int instance, struct davinci_i2c_platform_data *pdata); int da8xx_register_spi_bus(int instance, unsigned num_chipselect); int da8xx_register_watchdog(void); +int da8xx_register_usb_refclkin(int rate); +int da8xx_register_usb20_phy_clk(bool use_usb_refclkin); +int da8xx_register_usb11_phy_clk(bool use_usb_refclkin); int da8xx_register_usb20(unsigned mA, unsigned potpgt); int da8xx_register_usb11(struct da8xx_ohci_root_hub *pdata); int da8xx_register_emac(void); diff --git a/arch/arm/mach-davinci/usb-da8xx.c b/arch/arm/mach-davinci/usb-da8xx.c index f141f51..c524d9e 100644 --- a/arch/arm/mach-davinci/usb-da8xx.c +++ b/arch/arm/mach-davinci/usb-da8xx.c @@ -1,20 +1,235 @@ /* * DA8xx USB */ -#include <linux/dma-mapping.h> +#include <linux/clk.h> +#include <linux/delay.h> #include <linux/init.h> #include <linux/platform_data/usb-davinci.h> #include <linux/platform_device.h> +#include <linux/mfd/da8xx-cfgchip.h> #include <linux/usb/musb.h> +#include <mach/clock.h> #include <mach/common.h> #include <mach/cputype.h> #include <mach/da8xx.h> -#include <mach/irqs.h> + +#include "clock.h" #define DA8XX_USB0_BASE 0x01e00000 #define DA8XX_USB1_BASE 0x01e25000 +static struct clk usb_refclkin = { + .name = "usb_refclkin", + .set_rate = davinci_simple_set_rate, +}; + +static struct clk_lookup usb_refclkin_lookup = + CLK(NULL, "usb_refclkin", &usb_refclkin); + +/** + * da8xx_register_usb_refclkin - register USB_REFCLKIN clock + * + * @rate: The clock rate in Hz + * + * This clock is only needed if the board provides an external USB_REFCLKIN + * signal, in which case it will be used as the parent of usb20_phy_clk and/or + * usb11_phy_clk. + */ +int __init da8xx_register_usb_refclkin(int rate) +{ + int ret; + + usb_refclkin.rate = rate; + ret = clk_register(&usb_refclkin); + if (ret) + return ret; + + clkdev_add(&usb_refclkin_lookup); + + return 0; +} + +static void usb20_phy_clk_enable(struct clk *clk) +{ + u32 val; + u32 timeout = 500000; /* 500 msec */ + + val = readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + + /* + * Turn on the USB 2.0 PHY, but just the PLL, and not OTG. The USB 1.1 + * host may use the PLL clock without USB 2.0 OTG being used. + */ + val &= ~(CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN); + val |= CFGCHIP2_PHY_PLLON; + + writel(val, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + + while (--timeout) { + val = readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + if (val & CFGCHIP2_PHYCLKGD) + return; + udelay(1); + } + + pr_err("Timeout waiting for USB 2.0 PHY clock good.\n"); +} + +static void usb20_phy_clk_disable(struct clk *clk) +{ + u32 val; + + val = readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + val |= CFGCHIP2_PHYPWRDN; + writel(val, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); +} + +static int usb20_phy_clk_set_parent(struct clk *clk, struct clk *parent) +{ + u32 val; + + val = readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + + /* Set the mux depending on the parent clock. */ + if (parent == &usb_refclkin) { + val &= ~CFGCHIP2_USB2PHYCLKMUX; + } else if (strcmp(parent->name, "pll0_aux_clk") == 0) { + val |= CFGCHIP2_USB2PHYCLKMUX; + } else { + pr_err("Bad parent on USB 2.0 PHY clock.\n"); + return -EINVAL; + } + + /* reference frequency also comes from parent clock */ + val &= ~CFGCHIP2_REFFREQ_MASK; + switch (clk_get_rate(parent)) { + case 12000000: + val |= CFGCHIP2_REFFREQ_12MHZ; + break; + case 13000000: + val |= CFGCHIP2_REFFREQ_13MHZ; + break; + case 19200000: + val |= CFGCHIP2_REFFREQ_19_2MHZ; + break; + case 20000000: + val |= CFGCHIP2_REFFREQ_20MHZ; + break; + case 24000000: + val |= CFGCHIP2_REFFREQ_24MHZ; + break; + case 26000000: + val |= CFGCHIP2_REFFREQ_26MHZ; + break; + case 38400000: + val |= CFGCHIP2_REFFREQ_38_4MHZ; + break; + case 40000000: + val |= CFGCHIP2_REFFREQ_40MHZ; + break; + case 48000000: + val |= CFGCHIP2_REFFREQ_48MHZ; + break; + default: + pr_err("Bad parent clock rate on USB 2.0 PHY clock.\n"); + return -EINVAL; + } + + writel(val, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + + return 0; +} + +static struct clk usb20_phy_clk = { + .name = "usb20_phy", + .clk_enable = usb20_phy_clk_enable, + .clk_disable = usb20_phy_clk_disable, + .set_parent = usb20_phy_clk_set_parent, +}; + +static struct clk_lookup usb20_phy_clk_lookup = + CLK(NULL, "usb20_phy", &usb20_phy_clk); + +/** + * da8xx_register_usb20_phy_clk - register USB0PHYCLKMUX clock + * + * @use_usb_refclkin: Selects the parent clock - either "usb_refclkin" if true + * or "pll0_aux" if false. + */ +int __init da8xx_register_usb20_phy_clk(bool use_usb_refclkin) +{ + struct clk *parent; + int ret = 0; + + parent = clk_get(NULL, use_usb_refclkin ? "usb_refclkin" : "pll0_aux"); + if (IS_ERR(parent)) + return PTR_ERR(parent); + + usb20_phy_clk.parent = parent; + ret = clk_register(&usb20_phy_clk); + if (!ret) + clkdev_add(&usb20_phy_clk_lookup); + + clk_put(parent); + + return ret; +} + +static int usb11_phy_clk_set_parent(struct clk *clk, struct clk *parent) +{ + u32 val; + + val = readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + + /* Set the USB 1.1 PHY clock mux based on the parent clock. */ + if (parent == &usb20_phy_clk) { + val &= ~CFGCHIP2_USB1PHYCLKMUX; + } else if (parent == &usb_refclkin) { + val |= CFGCHIP2_USB1PHYCLKMUX; + } else { + pr_err("Bad parent on USB 1.1 PHY clock.\n"); + return -EINVAL; + } + + writel(val, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + + return 0; +} + +static struct clk usb11_phy_clk = { + .name = "usb11_phy", + .set_parent = usb11_phy_clk_set_parent, +}; + +static struct clk_lookup usb11_phy_clk_lookup = + CLK(NULL, "usb11_phy", &usb11_phy_clk); + +/** + * da8xx_register_usb11_phy_clk - register USB1PHYCLKMUX clock + * + * @use_usb_refclkin: Selects the parent clock - either "usb_refclkin" if true + * or "usb20_phy" if false. + */ +int __init da8xx_register_usb11_phy_clk(bool use_usb_refclkin) +{ + struct clk *parent; + int ret = 0; + + parent = clk_get(NULL, use_usb_refclkin ? "usb_refclkin" : "usb20_phy"); + if (IS_ERR(parent)) + return PTR_ERR(parent); + + usb11_phy_clk.parent = parent; + ret = clk_register(&usb11_phy_clk); + if (!ret) + clkdev_add(&usb11_phy_clk_lookup); + + clk_put(parent); + + return ret; +} + #if IS_ENABLED(CONFIG_USB_MUSB_HDRC) static struct musb_hdrc_config musb_config = { -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: David Lechner <david-nq/r/kbU++upp/zk7JDF2g@public.gmane.org> To: nsekhar-l0cyMroinI0@public.gmane.org, khilman-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org Cc: David Lechner <david-nq/r/kbU++upp/zk7JDF2g@public.gmane.org>, petr-Qh/3xLP0EvwAvxtiuMwx3w@public.gmane.org, sergei.shtylyov-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org, Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, Pawel Moll <pawel.moll-5wv7dgnIgG8@public.gmane.org>, Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>, Ian Campbell <ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>, Kumar Gala <galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>, Kishon Vijay Abraham I <kishon-l0cyMroinI0@public.gmane.org>, Greg Kroah-Hartman <gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>, Alan Stern <stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org>, Bin Liu <b-liu-l0cyMroinI0@public.gmane.org>, Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Subject: [PATCH v5 1/5] ARM: davinci: da8xx: add usb phy clocks Date: Mon, 9 May 2016 18:46:48 -0500 [thread overview] Message-ID: <1462837612-7803-2-git-send-email-david@lechnology.com> (raw) In-Reply-To: <1462837612-7803-1-git-send-email-david-nq/r/kbU++upp/zk7JDF2g@public.gmane.org> Up to this point, the USB phy clock configuration was handled manually in the board files and in the usb drivers. This adds proper clocks so that the usb drivers can use clk_get and clk_enable and not have to worry about the details. Also, the related code is removed from the board files and replaced with the new clock registration functions. Signed-off-by: David Lechner <david-nq/r/kbU++upp/zk7JDF2g@public.gmane.org> --- arch/arm/mach-davinci/board-da830-evm.c | 22 ++- arch/arm/mach-davinci/board-omapl138-hawk.c | 16 +- arch/arm/mach-davinci/include/mach/da8xx.h | 3 + arch/arm/mach-davinci/usb-da8xx.c | 219 +++++++++++++++++++++++++++- 4 files changed, 239 insertions(+), 21 deletions(-) diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c index 3d8cf8c..605d444 100644 --- a/arch/arm/mach-davinci/board-da830-evm.c +++ b/arch/arm/mach-davinci/board-da830-evm.c @@ -115,18 +115,6 @@ static __init void da830_evm_usb_init(void) */ cfgchip2 = __raw_readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); - /* USB2.0 PHY reference clock is 24 MHz */ - cfgchip2 &= ~CFGCHIP2_REFFREQ; - cfgchip2 |= CFGCHIP2_REFFREQ_24MHZ; - - /* - * Select internal reference clock for USB 2.0 PHY - * and use it as a clock source for USB 1.1 PHY - * (this is the default setting anyway). - */ - cfgchip2 &= ~CFGCHIP2_USB1PHYCLKMUX; - cfgchip2 |= CFGCHIP2_USB2PHYCLKMUX; - /* * We have to override VBUS/ID signals when MUSB is configured into the * host-only mode -- ID pin will float if no cable is connected, so the @@ -143,6 +131,16 @@ static __init void da830_evm_usb_init(void) __raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); /* USB_REFCLKIN is not used. */ + ret = da8xx_register_usb20_phy_clk(false); + if (ret) + pr_warn("%s: USB 2.0 PHY CLK registration failed: %d\n", + __func__, ret); + + ret = da8xx_register_usb11_phy_clk(false); + if (ret) + pr_warn("%s: USB 1.1 PHY CLK registration failed: %d\n", + __func__, ret); + ret = davinci_cfg_reg(DA830_USB0_DRVVBUS); if (ret) pr_warn("%s: USB 2.0 PinMux setup failed: %d\n", __func__, ret); diff --git a/arch/arm/mach-davinci/board-omapl138-hawk.c b/arch/arm/mach-davinci/board-omapl138-hawk.c index ee62486..d4930b6 100644 --- a/arch/arm/mach-davinci/board-omapl138-hawk.c +++ b/arch/arm/mach-davinci/board-omapl138-hawk.c @@ -243,7 +243,6 @@ static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id) static __init void omapl138_hawk_usb_init(void) { int ret; - u32 cfgchip2; ret = davinci_cfg_reg_list(da850_hawk_usb11_pins); if (ret) { @@ -251,12 +250,15 @@ static __init void omapl138_hawk_usb_init(void) return; } - /* Setup the Ref. clock frequency for the HAWK at 24 MHz. */ - - cfgchip2 = __raw_readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); - cfgchip2 &= ~CFGCHIP2_REFFREQ; - cfgchip2 |= CFGCHIP2_REFFREQ_24MHZ; - __raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + /* USB_REFCLKIN is not used. */ + ret = da8xx_register_usb20_phy_clk(false); + if (ret) + pr_warn("%s: USB 2.0 PHY CLK registration failed: %d\n", + __func__, ret); + ret = da8xx_register_usb11_phy_clk(false); + if (ret) + pr_warn("%s: USB 1.1 PHY CLK registration failed: %d\n", + __func__, ret); ret = gpio_request_one(DA850_USB1_VBUS_PIN, GPIOF_DIR_OUT, "USB1 VBUS"); diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h b/arch/arm/mach-davinci/include/mach/da8xx.h index f9f9713..c367530 100644 --- a/arch/arm/mach-davinci/include/mach/da8xx.h +++ b/arch/arm/mach-davinci/include/mach/da8xx.h @@ -88,6 +88,9 @@ int da850_register_edma(struct edma_rsv_info *rsv[2]); int da8xx_register_i2c(int instance, struct davinci_i2c_platform_data *pdata); int da8xx_register_spi_bus(int instance, unsigned num_chipselect); int da8xx_register_watchdog(void); +int da8xx_register_usb_refclkin(int rate); +int da8xx_register_usb20_phy_clk(bool use_usb_refclkin); +int da8xx_register_usb11_phy_clk(bool use_usb_refclkin); int da8xx_register_usb20(unsigned mA, unsigned potpgt); int da8xx_register_usb11(struct da8xx_ohci_root_hub *pdata); int da8xx_register_emac(void); diff --git a/arch/arm/mach-davinci/usb-da8xx.c b/arch/arm/mach-davinci/usb-da8xx.c index f141f51..c524d9e 100644 --- a/arch/arm/mach-davinci/usb-da8xx.c +++ b/arch/arm/mach-davinci/usb-da8xx.c @@ -1,20 +1,235 @@ /* * DA8xx USB */ -#include <linux/dma-mapping.h> +#include <linux/clk.h> +#include <linux/delay.h> #include <linux/init.h> #include <linux/platform_data/usb-davinci.h> #include <linux/platform_device.h> +#include <linux/mfd/da8xx-cfgchip.h> #include <linux/usb/musb.h> +#include <mach/clock.h> #include <mach/common.h> #include <mach/cputype.h> #include <mach/da8xx.h> -#include <mach/irqs.h> + +#include "clock.h" #define DA8XX_USB0_BASE 0x01e00000 #define DA8XX_USB1_BASE 0x01e25000 +static struct clk usb_refclkin = { + .name = "usb_refclkin", + .set_rate = davinci_simple_set_rate, +}; + +static struct clk_lookup usb_refclkin_lookup = + CLK(NULL, "usb_refclkin", &usb_refclkin); + +/** + * da8xx_register_usb_refclkin - register USB_REFCLKIN clock + * + * @rate: The clock rate in Hz + * + * This clock is only needed if the board provides an external USB_REFCLKIN + * signal, in which case it will be used as the parent of usb20_phy_clk and/or + * usb11_phy_clk. + */ +int __init da8xx_register_usb_refclkin(int rate) +{ + int ret; + + usb_refclkin.rate = rate; + ret = clk_register(&usb_refclkin); + if (ret) + return ret; + + clkdev_add(&usb_refclkin_lookup); + + return 0; +} + +static void usb20_phy_clk_enable(struct clk *clk) +{ + u32 val; + u32 timeout = 500000; /* 500 msec */ + + val = readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + + /* + * Turn on the USB 2.0 PHY, but just the PLL, and not OTG. The USB 1.1 + * host may use the PLL clock without USB 2.0 OTG being used. + */ + val &= ~(CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN); + val |= CFGCHIP2_PHY_PLLON; + + writel(val, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + + while (--timeout) { + val = readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + if (val & CFGCHIP2_PHYCLKGD) + return; + udelay(1); + } + + pr_err("Timeout waiting for USB 2.0 PHY clock good.\n"); +} + +static void usb20_phy_clk_disable(struct clk *clk) +{ + u32 val; + + val = readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + val |= CFGCHIP2_PHYPWRDN; + writel(val, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); +} + +static int usb20_phy_clk_set_parent(struct clk *clk, struct clk *parent) +{ + u32 val; + + val = readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + + /* Set the mux depending on the parent clock. */ + if (parent == &usb_refclkin) { + val &= ~CFGCHIP2_USB2PHYCLKMUX; + } else if (strcmp(parent->name, "pll0_aux_clk") == 0) { + val |= CFGCHIP2_USB2PHYCLKMUX; + } else { + pr_err("Bad parent on USB 2.0 PHY clock.\n"); + return -EINVAL; + } + + /* reference frequency also comes from parent clock */ + val &= ~CFGCHIP2_REFFREQ_MASK; + switch (clk_get_rate(parent)) { + case 12000000: + val |= CFGCHIP2_REFFREQ_12MHZ; + break; + case 13000000: + val |= CFGCHIP2_REFFREQ_13MHZ; + break; + case 19200000: + val |= CFGCHIP2_REFFREQ_19_2MHZ; + break; + case 20000000: + val |= CFGCHIP2_REFFREQ_20MHZ; + break; + case 24000000: + val |= CFGCHIP2_REFFREQ_24MHZ; + break; + case 26000000: + val |= CFGCHIP2_REFFREQ_26MHZ; + break; + case 38400000: + val |= CFGCHIP2_REFFREQ_38_4MHZ; + break; + case 40000000: + val |= CFGCHIP2_REFFREQ_40MHZ; + break; + case 48000000: + val |= CFGCHIP2_REFFREQ_48MHZ; + break; + default: + pr_err("Bad parent clock rate on USB 2.0 PHY clock.\n"); + return -EINVAL; + } + + writel(val, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + + return 0; +} + +static struct clk usb20_phy_clk = { + .name = "usb20_phy", + .clk_enable = usb20_phy_clk_enable, + .clk_disable = usb20_phy_clk_disable, + .set_parent = usb20_phy_clk_set_parent, +}; + +static struct clk_lookup usb20_phy_clk_lookup = + CLK(NULL, "usb20_phy", &usb20_phy_clk); + +/** + * da8xx_register_usb20_phy_clk - register USB0PHYCLKMUX clock + * + * @use_usb_refclkin: Selects the parent clock - either "usb_refclkin" if true + * or "pll0_aux" if false. + */ +int __init da8xx_register_usb20_phy_clk(bool use_usb_refclkin) +{ + struct clk *parent; + int ret = 0; + + parent = clk_get(NULL, use_usb_refclkin ? "usb_refclkin" : "pll0_aux"); + if (IS_ERR(parent)) + return PTR_ERR(parent); + + usb20_phy_clk.parent = parent; + ret = clk_register(&usb20_phy_clk); + if (!ret) + clkdev_add(&usb20_phy_clk_lookup); + + clk_put(parent); + + return ret; +} + +static int usb11_phy_clk_set_parent(struct clk *clk, struct clk *parent) +{ + u32 val; + + val = readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + + /* Set the USB 1.1 PHY clock mux based on the parent clock. */ + if (parent == &usb20_phy_clk) { + val &= ~CFGCHIP2_USB1PHYCLKMUX; + } else if (parent == &usb_refclkin) { + val |= CFGCHIP2_USB1PHYCLKMUX; + } else { + pr_err("Bad parent on USB 1.1 PHY clock.\n"); + return -EINVAL; + } + + writel(val, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)); + + return 0; +} + +static struct clk usb11_phy_clk = { + .name = "usb11_phy", + .set_parent = usb11_phy_clk_set_parent, +}; + +static struct clk_lookup usb11_phy_clk_lookup = + CLK(NULL, "usb11_phy", &usb11_phy_clk); + +/** + * da8xx_register_usb11_phy_clk - register USB1PHYCLKMUX clock + * + * @use_usb_refclkin: Selects the parent clock - either "usb_refclkin" if true + * or "usb20_phy" if false. + */ +int __init da8xx_register_usb11_phy_clk(bool use_usb_refclkin) +{ + struct clk *parent; + int ret = 0; + + parent = clk_get(NULL, use_usb_refclkin ? "usb_refclkin" : "usb20_phy"); + if (IS_ERR(parent)) + return PTR_ERR(parent); + + usb11_phy_clk.parent = parent; + ret = clk_register(&usb11_phy_clk); + if (!ret) + clkdev_add(&usb11_phy_clk_lookup); + + clk_put(parent); + + return ret; +} + #if IS_ENABLED(CONFIG_USB_MUSB_HDRC) static struct musb_hdrc_config musb_config = { -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2016-05-09 23:48 UTC|newest] Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-05-09 23:46 [PATCH v5 0/5] da8xx USB PHY platform devices and clocks (was "da8xx UBS clocks") David Lechner 2016-05-09 23:46 ` David Lechner 2016-05-09 23:46 ` David Lechner [this message] 2016-05-09 23:46 ` [PATCH v5 1/5] ARM: davinci: da8xx: add usb phy clocks David Lechner 2016-05-09 23:46 ` [PATCH v5 2/5] ARM: davinci: da8xx: Add CFGCHIP syscon platform declaration David Lechner 2016-05-10 11:26 ` Sergei Shtylyov 2016-05-10 16:44 ` David Lechner 2016-05-25 11:15 ` Sekhar Nori 2016-05-25 11:15 ` Sekhar Nori 2016-06-22 17:03 ` David Lechner 2016-06-22 17:03 ` David Lechner 2016-06-22 17:07 ` David Lechner 2016-06-22 17:07 ` David Lechner 2016-06-24 6:15 ` Sekhar Nori 2016-06-24 6:15 ` Sekhar Nori 2016-06-24 16:00 ` David Lechner 2016-06-24 16:00 ` David Lechner 2016-05-09 23:46 ` [PATCH v5 3/5] ARM: davinci: da8xx: Add USB PHY " David Lechner 2016-05-09 23:46 ` David Lechner 2016-05-10 11:24 ` Sergei Shtylyov 2016-06-22 17:08 ` David Lechner 2016-06-22 17:08 ` David Lechner 2016-05-09 23:46 ` [PATCH v5 4/5] ARM: DTS: da850: Add cfgchip syscon node David Lechner 2016-05-09 23:46 ` David Lechner 2016-05-09 23:46 ` [PATCH v5 5/5] ARM: DTS: da850: Add usb phy node David Lechner 2016-05-09 23:46 ` David Lechner 2016-05-23 15:14 ` [PATCH v5 0/5] da8xx USB PHY platform devices and clocks (was "da8xx UBS clocks") David Lechner 2016-05-25 11:18 ` Sekhar Nori 2016-05-25 11:18 ` Sekhar Nori 2016-08-12 21:24 ` Kevin Hilman 2016-08-17 9:35 ` Kishon Vijay Abraham I 2016-08-17 9:35 ` Kishon Vijay Abraham I 2016-08-19 16:40 ` Kevin Hilman 2016-08-19 16:40 ` Kevin Hilman 2016-08-19 16:50 ` David Lechner
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=1462837612-7803-2-git-send-email-david@lechnology.com \ --to=david@lechnology.com \ --cc=b-liu@ti.com \ --cc=devicetree@vger.kernel.org \ --cc=galak@codeaurora.org \ --cc=gregkh@linuxfoundation.org \ --cc=ijc+devicetree@hellion.org.uk \ --cc=khilman@kernel.org \ --cc=kishon@ti.com \ --cc=lee.jones@linaro.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-usb@vger.kernel.org \ --cc=mark.rutland@arm.com \ --cc=nsekhar@ti.com \ --cc=pawel.moll@arm.com \ --cc=petr@barix.com \ --cc=robh+dt@kernel.org \ --cc=sergei.shtylyov@cogentembedded.com \ --cc=stern@rowland.harvard.edu \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.