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[109.210.96.69]) by smtp.gmail.com with ESMTPSA id p6sm40652484wrq.97.2019.07.22.06.44.42 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 22 Jul 2019 06:44:42 -0700 (PDT) From: Bartosz Golaszewski To: Sekhar Nori , Kevin Hilman , Bartlomiej Zolnierkiewicz , David Lechner , Linus Walleij Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v2 4/9] fbdev: da8xx: add support for a regulator Date: Mon, 22 Jul 2019 15:44:18 +0200 Message-Id: <20190722134423.26555-5-brgl@bgdev.pl> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190722134423.26555-1-brgl@bgdev.pl> References: <20190722134423.26555-1-brgl@bgdev.pl> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bartosz Golaszewski We want to remove the hacky platform data callback for power control. Add a regulator to the driver data and enable/disable it next to the current panel_power_ctrl() calls. We will use it in subsequent patch on da850-evm. Signed-off-by: Bartosz Golaszewski Acked-by: Bartlomiej Zolnierkiewicz --- drivers/video/fbdev/da8xx-fb.c | 54 ++++++++++++++++++++++++++++++---- 1 file changed, 49 insertions(+), 5 deletions(-) diff --git a/drivers/video/fbdev/da8xx-fb.c b/drivers/video/fbdev/da8xx-fb.c index b1cf248f3291..02dfe9e32eed 100644 --- a/drivers/video/fbdev/da8xx-fb.c +++ b/drivers/video/fbdev/da8xx-fb.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -165,6 +166,7 @@ struct da8xx_fb_par { #endif unsigned int lcdc_clk_rate; void (*panel_power_ctrl)(int); + struct regulator *lcd_supply; u32 pseudo_palette[16]; struct fb_videomode mode; struct lcd_ctrl_config cfg; @@ -1066,6 +1068,7 @@ static void lcd_da8xx_cpufreq_deregister(struct da8xx_fb_par *par) static int fb_remove(struct platform_device *dev) { struct fb_info *info = dev_get_drvdata(&dev->dev); + int ret; if (info) { struct da8xx_fb_par *par = info->par; @@ -1073,8 +1076,13 @@ static int fb_remove(struct platform_device *dev) #ifdef CONFIG_CPU_FREQ lcd_da8xx_cpufreq_deregister(par); #endif - if (par->panel_power_ctrl) + if (par->panel_power_ctrl) { par->panel_power_ctrl(0); + } else if (par->lcd_supply) { + ret = regulator_disable(par->lcd_supply); + if (ret) + return ret; + } lcd_disable_raster(DA8XX_FRAME_WAIT); lcdc_write(0, LCD_RASTER_CTRL_REG); @@ -1179,15 +1187,25 @@ static int cfb_blank(int blank, struct fb_info *info) case FB_BLANK_UNBLANK: lcd_enable_raster(); - if (par->panel_power_ctrl) + if (par->panel_power_ctrl) { par->panel_power_ctrl(1); + } else if (par->lcd_supply) { + ret = regulator_enable(par->lcd_supply); + if (ret) + return ret; + } break; case FB_BLANK_NORMAL: case FB_BLANK_VSYNC_SUSPEND: case FB_BLANK_HSYNC_SUSPEND: case FB_BLANK_POWERDOWN: - if (par->panel_power_ctrl) + if (par->panel_power_ctrl) { par->panel_power_ctrl(0); + } else if (par->lcd_supply) { + ret = regulator_disable(par->lcd_supply); + if (ret) + return ret; + } lcd_disable_raster(DA8XX_FRAME_WAIT); break; @@ -1400,6 +1418,20 @@ static int fb_probe(struct platform_device *device) par->panel_power_ctrl(1); } + par->lcd_supply = devm_regulator_get_optional(&device->dev, "lcd"); + if (IS_ERR(par->lcd_supply)) { + if (PTR_ERR(par->lcd_supply) == -EPROBE_DEFER) { + ret = -EPROBE_DEFER; + goto err_pm_runtime_disable; + } + + par->lcd_supply = NULL; + } else { + ret = regulator_enable(par->lcd_supply); + if (ret) + goto err_pm_runtime_disable; + } + fb_videomode_to_var(&da8xx_fb_var, lcdc_info); par->cfg = *lcd_cfg; @@ -1603,10 +1635,16 @@ static int fb_suspend(struct device *dev) { struct fb_info *info = dev_get_drvdata(dev); struct da8xx_fb_par *par = info->par; + int ret; console_lock(); - if (par->panel_power_ctrl) + if (par->panel_power_ctrl) { par->panel_power_ctrl(0); + } else if (par->lcd_supply) { + ret = regulator_disable(par->lcd_supply); + if (ret) + return ret; + } fb_set_suspend(info, 1); lcd_disable_raster(DA8XX_FRAME_WAIT); @@ -1620,6 +1658,7 @@ static int fb_resume(struct device *dev) { struct fb_info *info = dev_get_drvdata(dev); struct da8xx_fb_par *par = info->par; + int ret; console_lock(); pm_runtime_get_sync(dev); @@ -1627,8 +1666,13 @@ static int fb_resume(struct device *dev) if (par->blank == FB_BLANK_UNBLANK) { lcd_enable_raster(); - if (par->panel_power_ctrl) + if (par->panel_power_ctrl) { par->panel_power_ctrl(1); + } else if (par->lcd_supply) { + ret = regulator_enable(par->lcd_supply); + if (ret) + return ret; + } } fb_set_suspend(info, 0); -- 2.21.0