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Wed, 23 Oct 2019 03:10:01 -0700 (PDT) Received: from pi3 ([194.230.155.217]) by smtp.googlemail.com with ESMTPSA id o31sm851700edd.17.2019.10.23.03.09.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Oct 2019 03:10:00 -0700 (PDT) Date: Wed, 23 Oct 2019 12:09:58 +0200 From: Krzysztof Kozlowski To: Arnd Bergmann Subject: Re: [PATCH 04/36] usb: gadget: s3c-hsudc: remove platform header dependency Message-ID: <20191023100958.GB10630@pi3> References: <20191010202802.1132272-1-arnd@arndb.de> <20191010203043.1241612-1-arnd@arndb.de> <20191010203043.1241612-4-arnd@arndb.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191010203043.1241612-4-arnd@arndb.de> User-Agent: Mutt/1.12.1 (2019-06-15) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191023_031006_877427_F9E693AB X-CRM114-Status: GOOD ( 19.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Felipe Balbi , linux-samsung-soc@vger.kernel.org, Greg Kroah-Hartman , linus.walleij@linaro.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Kukjin Kim , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Oct 10, 2019 at 10:29:48PM +0200, Arnd Bergmann wrote: > There is no real phy driver, so s3c-hsudc just pokes the registers > itself. Improve this a little by making it a platform data callback > like we do for gpios. > > There is only one board using this driver, and it's unlikely > that another would be added, so this is a minimal workaround. > > Signed-off-by: Arnd Bergmann > --- > .../include/mach/regs-s3c2443-clock.h | 49 +++++++++++++++++ > arch/arm/plat-samsung/devs.c | 3 + > drivers/usb/gadget/udc/s3c-hsudc.c | 55 ++----------------- > include/linux/platform_data/s3c-hsudc.h | 2 + > 4 files changed, 58 insertions(+), 51 deletions(-) > > diff --git a/arch/arm/mach-s3c24xx/include/mach/regs-s3c2443-clock.h b/arch/arm/mach-s3c24xx/include/mach/regs-s3c2443-clock.h > index 6bf924612b06..682759549e63 100644 > --- a/arch/arm/mach-s3c24xx/include/mach/regs-s3c2443-clock.h > +++ b/arch/arm/mach-s3c24xx/include/mach/regs-s3c2443-clock.h > @@ -10,6 +10,8 @@ > #ifndef __ASM_ARM_REGS_S3C2443_CLOCK > #define __ASM_ARM_REGS_S3C2443_CLOCK > > +#include > + > #define S3C2443_CLKREG(x) ((x) + S3C24XX_VA_CLKPWR) > > #define S3C2443_PLLCON_MDIVSHIFT 16 > @@ -184,5 +186,52 @@ s3c2443_get_epll(unsigned int pllval, unsigned int baseclk) > return (unsigned int)fvco; > } > > +static inline void s3c_hsudc_init_phy(void) > +{ > + u32 cfg; > + > + cfg = readl(S3C2443_PWRCFG) | S3C2443_PWRCFG_USBPHY; > + writel(cfg, S3C2443_PWRCFG); > + > + cfg = readl(S3C2443_URSTCON); > + cfg |= (S3C2443_URSTCON_FUNCRST | S3C2443_URSTCON_PHYRST); > + writel(cfg, S3C2443_URSTCON); > + mdelay(1); > + > + cfg = readl(S3C2443_URSTCON); > + cfg &= ~(S3C2443_URSTCON_FUNCRST | S3C2443_URSTCON_PHYRST); > + writel(cfg, S3C2443_URSTCON); > + > + cfg = readl(S3C2443_PHYCTRL); > + cfg &= ~(S3C2443_PHYCTRL_CLKSEL | S3C2443_PHYCTRL_DSPORT); > + cfg |= (S3C2443_PHYCTRL_EXTCLK | S3C2443_PHYCTRL_PLLSEL); > + writel(cfg, S3C2443_PHYCTRL); > + > + cfg = readl(S3C2443_PHYPWR); > + cfg &= ~(S3C2443_PHYPWR_FSUSPEND | S3C2443_PHYPWR_PLL_PWRDN | > + S3C2443_PHYPWR_XO_ON | S3C2443_PHYPWR_PLL_REFCLK | > + S3C2443_PHYPWR_ANALOG_PD); > + cfg |= S3C2443_PHYPWR_COMMON_ON; > + writel(cfg, S3C2443_PHYPWR); > + > + cfg = readl(S3C2443_UCLKCON); > + cfg |= (S3C2443_UCLKCON_DETECT_VBUS | S3C2443_UCLKCON_FUNC_CLKEN | > + S3C2443_UCLKCON_TCLKEN); > + writel(cfg, S3C2443_UCLKCON); > +} > + > +static inline void s3c_hsudc_uninit_phy(void) > +{ > + u32 cfg; > + > + cfg = readl(S3C2443_PWRCFG) & ~S3C2443_PWRCFG_USBPHY; > + writel(cfg, S3C2443_PWRCFG); > + > + writel(S3C2443_PHYPWR_FSUSPEND, S3C2443_PHYPWR); > + > + cfg = readl(S3C2443_UCLKCON) & ~S3C2443_UCLKCON_FUNC_CLKEN; > + writel(cfg, S3C2443_UCLKCON); > +} > + > #endif /* __ASM_ARM_REGS_S3C2443_CLOCK */ > > diff --git a/arch/arm/plat-samsung/devs.c b/arch/arm/plat-samsung/devs.c > index 1d1fa068d228..6e4c1cb07104 100644 > --- a/arch/arm/plat-samsung/devs.c > +++ b/arch/arm/plat-samsung/devs.c > @@ -40,6 +40,7 @@ > #include > #include > #include > +#include > > #include > #include > @@ -1038,6 +1039,8 @@ struct platform_device s3c_device_usb_hsudc = { > void __init s3c24xx_hsudc_set_platdata(struct s3c24xx_hsudc_platdata *pd) > { > s3c_set_platdata(pd, sizeof(*pd), &s3c_device_usb_hsudc); > + pd->phy_init = s3c_hsudc_init_phy; > + pd->phy_uninit = s3c_hsudc_uninit_phy; > } > #endif /* CONFIG_PLAT_S3C24XX */ > > diff --git a/drivers/usb/gadget/udc/s3c-hsudc.c b/drivers/usb/gadget/udc/s3c-hsudc.c > index 858993c73442..d482cbb4bb4d 100644 > --- a/drivers/usb/gadget/udc/s3c-hsudc.c > +++ b/drivers/usb/gadget/udc/s3c-hsudc.c > @@ -30,8 +30,6 @@ > #include > #include > > -#include > - > #define S3C_HSUDC_REG(x) (x) > > /* Non-Indexed Registers */ > @@ -186,53 +184,6 @@ static inline void __orr32(void __iomem *ptr, u32 val) > writel(readl(ptr) | val, ptr); > } > > -static void s3c_hsudc_init_phy(void) > -{ > - u32 cfg; > - > - cfg = readl(S3C2443_PWRCFG) | S3C2443_PWRCFG_USBPHY; > - writel(cfg, S3C2443_PWRCFG); > - > - cfg = readl(S3C2443_URSTCON); > - cfg |= (S3C2443_URSTCON_FUNCRST | S3C2443_URSTCON_PHYRST); > - writel(cfg, S3C2443_URSTCON); > - mdelay(1); > - > - cfg = readl(S3C2443_URSTCON); > - cfg &= ~(S3C2443_URSTCON_FUNCRST | S3C2443_URSTCON_PHYRST); > - writel(cfg, S3C2443_URSTCON); > - > - cfg = readl(S3C2443_PHYCTRL); > - cfg &= ~(S3C2443_PHYCTRL_CLKSEL | S3C2443_PHYCTRL_DSPORT); > - cfg |= (S3C2443_PHYCTRL_EXTCLK | S3C2443_PHYCTRL_PLLSEL); > - writel(cfg, S3C2443_PHYCTRL); > - > - cfg = readl(S3C2443_PHYPWR); > - cfg &= ~(S3C2443_PHYPWR_FSUSPEND | S3C2443_PHYPWR_PLL_PWRDN | > - S3C2443_PHYPWR_XO_ON | S3C2443_PHYPWR_PLL_REFCLK | > - S3C2443_PHYPWR_ANALOG_PD); > - cfg |= S3C2443_PHYPWR_COMMON_ON; > - writel(cfg, S3C2443_PHYPWR); > - > - cfg = readl(S3C2443_UCLKCON); > - cfg |= (S3C2443_UCLKCON_DETECT_VBUS | S3C2443_UCLKCON_FUNC_CLKEN | > - S3C2443_UCLKCON_TCLKEN); > - writel(cfg, S3C2443_UCLKCON); > -} > - > -static void s3c_hsudc_uninit_phy(void) > -{ > - u32 cfg; > - > - cfg = readl(S3C2443_PWRCFG) & ~S3C2443_PWRCFG_USBPHY; > - writel(cfg, S3C2443_PWRCFG); > - > - writel(S3C2443_PHYPWR_FSUSPEND, S3C2443_PHYPWR); > - > - cfg = readl(S3C2443_UCLKCON) & ~S3C2443_UCLKCON_FUNC_CLKEN; > - writel(cfg, S3C2443_UCLKCON); > -} > - > /** > * s3c_hsudc_complete_request - Complete a transfer request. > * @hsep: Endpoint to which the request belongs. > @@ -1188,7 +1139,8 @@ static int s3c_hsudc_start(struct usb_gadget *gadget, > > pm_runtime_get_sync(hsudc->dev); > > - s3c_hsudc_init_phy(); > + if (hsudc->pd->phy_init) > + hsudc->pd->gpio_init(); Copy paste error - phy_init(). Are here (and in previous usb gadget patch) any dependencies? If so, I would need an ack to take it through samsung-soc. Best regards, Krzysztof > if (hsudc->pd->gpio_init) > hsudc->pd->gpio_init(); > > @@ -1210,7 +1162,8 @@ static int s3c_hsudc_stop(struct usb_gadget *gadget) > > spin_lock_irqsave(&hsudc->lock, flags); > hsudc->gadget.speed = USB_SPEED_UNKNOWN; > - s3c_hsudc_uninit_phy(); > + if (hsudc->pd->phy_uninit) > + hsudc->pd->phy_uninit(); > > pm_runtime_put(hsudc->dev); > > diff --git a/include/linux/platform_data/s3c-hsudc.h b/include/linux/platform_data/s3c-hsudc.h > index 4dc9b8760166..a170939832d5 100644 > --- a/include/linux/platform_data/s3c-hsudc.h > +++ b/include/linux/platform_data/s3c-hsudc.h > @@ -26,6 +26,8 @@ struct s3c24xx_hsudc_platdata { > unsigned int epnum; > void (*gpio_init)(void); > void (*gpio_uninit)(void); > + void (*phy_init)(void); > + void (*phy_uninit)(void); > }; > > #endif /* __LINUX_USB_S3C_HSUDC_H */ > -- > 2.20.0 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel