diff options
Diffstat (limited to 'drivers/video')
49 files changed, 2977 insertions, 731 deletions
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 773c4a68de8..3dc10381e0c 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -1511,6 +1511,7 @@ config FB_VIA select FB_CFB_IMAGEBLIT select I2C_ALGOBIT select I2C + select GPIOLIB help This is the frame buffer device driver for Graphics chips of VIA UniChrome (Pro) Family (CLE266,PM800/CN400,P4M800CE/P4M800Pro/ @@ -1520,6 +1521,21 @@ config FB_VIA To compile this driver as a module, choose M here: the module will be called viafb. + +if FB_VIA + +config FB_VIA_DIRECT_PROCFS + bool "direct hardware access via procfs (DEPRECATED)(DANGEROUS)" + depends on FB_VIA + default n + help + Allow direct hardware access to some output registers via procfs. + This is dangerous but may provide the only chance to get the + correct output device configuration. + Its use is strongly discouraged. + +endif + config FB_NEOMAGIC tristate "NeoMagic display support" depends on FB && PCI @@ -2194,7 +2210,6 @@ config FB_MSM select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT - default y config FB_MX3 tristate "MX3 Framebuffer support" diff --git a/drivers/video/aty/radeon_base.c b/drivers/video/aty/radeon_base.c index 6c37e8ee5ef..3c1e13ed1cb 100644 --- a/drivers/video/aty/radeon_base.c +++ b/drivers/video/aty/radeon_base.c @@ -2099,7 +2099,7 @@ static ssize_t radeon_show_one_edid(char *buf, loff_t off, size_t count, const u } -static ssize_t radeon_show_edid1(struct kobject *kobj, +static ssize_t radeon_show_edid1(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { @@ -2112,7 +2112,7 @@ static ssize_t radeon_show_edid1(struct kobject *kobj, } -static ssize_t radeon_show_edid2(struct kobject *kobj, +static ssize_t radeon_show_edid2(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { diff --git a/drivers/video/cobalt_lcdfb.c b/drivers/video/cobalt_lcdfb.c index 5eb61b5adfe..42fe155aba0 100644 --- a/drivers/video/cobalt_lcdfb.c +++ b/drivers/video/cobalt_lcdfb.c @@ -123,7 +123,7 @@ static void lcd_clear(struct fb_info *info) lcd_write_control(info, LCD_RESET); } -static struct fb_fix_screeninfo cobalt_lcdfb_fix __initdata = { +static struct fb_fix_screeninfo cobalt_lcdfb_fix __devinitdata = { .id = "cobalt-lcd", .type = FB_TYPE_TEXT, .type_aux = FB_AUX_TEXT_MDA, diff --git a/drivers/video/efifb.c b/drivers/video/efifb.c index ecf405562f5..4a56f46af40 100644 --- a/drivers/video/efifb.c +++ b/drivers/video/efifb.c @@ -168,7 +168,7 @@ static void efifb_destroy(struct fb_info *info) { if (info->screen_base) iounmap(info->screen_base); - release_mem_region(info->aperture_base, info->aperture_size); + release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size); framebuffer_release(info); } @@ -292,8 +292,13 @@ static int __devinit efifb_probe(struct platform_device *dev) info->pseudo_palette = info->par; info->par = NULL; - info->aperture_base = efifb_fix.smem_start; - info->aperture_size = size_remap; + info->apertures = alloc_apertures(1); + if (!info->apertures) { + err = -ENOMEM; + goto err_release_fb; + } + info->apertures->ranges[0].base = efifb_fix.smem_start; + info->apertures->ranges[0].size = size_remap; info->screen_base = ioremap(efifb_fix.smem_start, efifb_fix.smem_len); if (!info->screen_base) { diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index a15b44e9c00..731fce64df9 100644 --- a/drivers/video/fbmem.c +++ b/drivers/video/fbmem.c @@ -1468,16 +1468,70 @@ static int fb_check_foreignness(struct fb_info *fi) return 0; } -static bool fb_do_apertures_overlap(struct fb_info *gen, struct fb_info *hw) +static bool apertures_overlap(struct aperture *gen, struct aperture *hw) { /* is the generic aperture base the same as the HW one */ - if (gen->aperture_base == hw->aperture_base) + if (gen->base == hw->base) return true; /* is the generic aperture base inside the hw base->hw base+size */ - if (gen->aperture_base > hw->aperture_base && gen->aperture_base <= hw->aperture_base + hw->aperture_size) + if (gen->base > hw->base && gen->base <= hw->base + hw->size) return true; return false; } + +static bool fb_do_apertures_overlap(struct apertures_struct *gena, + struct apertures_struct *hwa) +{ + int i, j; + if (!hwa || !gena) + return false; + + for (i = 0; i < hwa->count; ++i) { + struct aperture *h = &hwa->ranges[i]; + for (j = 0; j < gena->count; ++j) { + struct aperture *g = &gena->ranges[j]; + printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n", + (unsigned long long)g->base, + (unsigned long long)g->size, + (unsigned long long)h->base, + (unsigned long long)h->size); + if (apertures_overlap(g, h)) + return true; + } + } + + return false; +} + +#define VGA_FB_PHYS 0xA0000 +void remove_conflicting_framebuffers(struct apertures_struct *a, + const char *name, bool primary) +{ + int i; + + /* check all firmware fbs and kick off if the base addr overlaps */ + for (i = 0 ; i < FB_MAX; i++) { + struct apertures_struct *gen_aper; + if (!registered_fb[i]) + continue; + + if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE)) + continue; + + gen_aper = registered_fb[i]->apertures; + if (fb_do_apertures_overlap(gen_aper, a) || + (primary && gen_aper && gen_aper->count && + gen_aper->ranges[0].base == VGA_FB_PHYS)) { + + printk(KERN_ERR "fb: conflicting fb hw usage " + "%s vs %s - removing generic driver\n", + name, registered_fb[i]->fix.id); + unregister_framebuffer(registered_fb[i]); + } + } +} +EXPORT_SYMBOL(remove_conflicting_framebuffers); + /** * register_framebuffer - registers a frame buffer device * @fb_info: frame buffer info structure @@ -1501,21 +1555,8 @@ register_framebuffer(struct fb_info *fb_info) if (fb_check_foreignness(fb_info)) return -ENOSYS; - /* check all firmware fbs and kick off if the base addr overlaps */ - for (i = 0 ; i < FB_MAX; i++) { - if (!registered_fb[i]) - continue; - - if (registered_fb[i]->flags & FBINFO_MISC_FIRMWARE) { - if (fb_do_apertures_overlap(registered_fb[i], fb_info)) { - printk(KERN_ERR "fb: conflicting fb hw usage " - "%s vs %s - removing generic driver\n", - fb_info->fix.id, - registered_fb[i]->fix.id); - unregister_framebuffer(registered_fb[i]); - } - } - } + remove_conflicting_framebuffers(fb_info->apertures, fb_info->fix.id, + fb_is_primary_device(fb_info)); num_registered_fb++; for (i = 0 ; i < FB_MAX; i++) diff --git a/drivers/video/fbsysfs.c b/drivers/video/fbsysfs.c index 81aa3129c17..0a08f134122 100644 --- a/drivers/video/fbsysfs.c +++ b/drivers/video/fbsysfs.c @@ -80,6 +80,7 @@ EXPORT_SYMBOL(framebuffer_alloc); */ void framebuffer_release(struct fb_info *info) { + kfree(info->apertures); kfree(info); } EXPORT_SYMBOL(framebuffer_release); diff --git a/drivers/video/mx3fb.c b/drivers/video/mx3fb.c index 772ba3f45e6..7cfc170bce1 100644 --- a/drivers/video/mx3fb.c +++ b/drivers/video/mx3fb.c @@ -387,7 +387,8 @@ static void sdc_disable_channel(struct mx3fb_info *mx3_fbi) spin_unlock_irqrestore(&mx3fb->lock, flags); - mx3_fbi->txd->chan->device->device_terminate_all(mx3_fbi->txd->chan); + mx3_fbi->txd->chan->device->device_control(mx3_fbi->txd->chan, + DMA_TERMINATE_ALL, 0); mx3_fbi->txd = NULL; mx3_fbi->cookie = -EINVAL; } diff --git a/drivers/video/offb.c b/drivers/video/offb.c index 61f8b8f919b..46dda7d8aae 100644 --- a/drivers/video/offb.c +++ b/drivers/video/offb.c @@ -285,7 +285,7 @@ static void offb_destroy(struct fb_info *info) { if (info->screen_base) iounmap(info->screen_base); - release_mem_region(info->aperture_base, info->aperture_size); + release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size); framebuffer_release(info); } @@ -491,8 +491,11 @@ static void __init offb_init_fb(const char *name, const char *full_name, var->vmode = FB_VMODE_NONINTERLACED; /* set offb aperture size for generic probing */ - info->aperture_base = address; - info->aperture_size = fix->smem_len; + info->apertures = alloc_apertures(1); + if (!info->apertures) + goto out_aper; + info->apertures->ranges[0].base = address; + info->apertures->ranges[0].size = fix->smem_len; info->fbops = &offb_ops; info->screen_base = ioremap(address, fix->smem_len); @@ -501,17 +504,20 @@ static void __init offb_init_fb(const char *name, const char *full_name, fb_alloc_cmap(&info->cmap, 256, 0); - if (register_framebuffer(info) < 0) { - iounmap(par->cmap_adr); - par->cmap_adr = NULL; - iounmap(info->screen_base); - framebuffer_release(info); - release_mem_region(res_start, res_size); - return; - } + if (register_framebuffer(info) < 0) + goto out_err; printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n", info->node, full_name); + return; + +out_err: + iounmap(info->screen_base); +out_aper: + iounmap(par->cmap_adr); + par->cmap_adr = NULL; + framebuffer_release(info); + release_mem_region(res_start, res_size); } diff --git a/drivers/video/omap2/displays/Kconfig b/drivers/video/omap2/displays/Kconfig index dfb57ee5086..881c9f77c75 100644 --- a/drivers/video/omap2/displays/Kconfig +++ b/drivers/video/omap2/displays/Kconfig @@ -10,6 +10,7 @@ config PANEL_GENERIC config PANEL_SHARP_LS037V7DW01 tristate "Sharp LS037V7DW01 LCD Panel" depends on OMAP2_DSS + select BACKLIGHT_CLASS_DEVICE help LCD Panel used in TI's SDP3430 and EVM boards @@ -33,8 +34,14 @@ config PANEL_TOPPOLY_TDO35S config PANEL_TPO_TD043MTEA1 tristate "TPO TD043MTEA1 LCD Panel" - depends on OMAP2_DSS && I2C + depends on OMAP2_DSS && SPI help LCD Panel used in OMAP3 Pandora +config PANEL_ACX565AKM + tristate "ACX565AKM Panel" + depends on OMAP2_DSS_SDI + select BACKLIGHT_CLASS_DEVICE + help + This is the LCD panel used on Nokia N900 endmenu diff --git a/drivers/video/omap2/displays/Makefile b/drivers/video/omap2/displays/Makefile index e2bb32168de..aa386095d7c 100644 --- a/drivers/video/omap2/displays/Makefile +++ b/drivers/video/omap2/displays/Makefile @@ -5,3 +5,4 @@ obj-$(CONFIG_PANEL_SHARP_LQ043T1DG01) += panel-sharp-lq043t1dg01.o obj-$(CONFIG_PANEL_TAAL) += panel-taal.o obj-$(CONFIG_PANEL_TOPPOLY_TDO35S) += panel-toppoly-tdo35s.o obj-$(CONFIG_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o +obj-$(CONFIG_PANEL_ACX565AKM) += panel-acx565akm.o diff --git a/drivers/video/omap2/displays/panel-acx565akm.c b/drivers/video/omap2/displays/panel-acx565akm.c new file mode 100644 index 00000000000..1f8eb70e293 --- /dev/null +++ b/drivers/video/omap2/displays/panel-acx565akm.c @@ -0,0 +1,819 @@ +/* + * Support for ACX565AKM LCD Panel used on Nokia N900 + * + * Copyright (C) 2010 Nokia Corporation + * + * Original Driver Author: Imre Deak <imre.deak@nokia.com> + * Based on panel-generic.c by Tomi Valkeinen <tomi.valkeinen@nokia.com> + * Adapted to new DSS2 framework: Roger Quadros <roger.quadros@nokia.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/delay.h> +#include <linux/spi/spi.h> +#include <linux/jiffies.h> +#include <linux/sched.h> +#include <linux/backlight.h> +#include <linux/fb.h> + +#include <plat/display.h> + +#define MIPID_CMD_READ_DISP_ID 0x04 +#define MIPID_CMD_READ_RED 0x06 +#define MIPID_CMD_READ_GREEN 0x07 +#define MIPID_CMD_READ_BLUE 0x08 +#define MIPID_CMD_READ_DISP_STATUS 0x09 +#define MIPID_CMD_RDDSDR 0x0F +#define MIPID_CMD_SLEEP_IN 0x10 +#define MIPID_CMD_SLEEP_OUT 0x11 +#define MIPID_CMD_DISP_OFF 0x28 +#define MIPID_CMD_DISP_ON 0x29 +#define MIPID_CMD_WRITE_DISP_BRIGHTNESS 0x51 +#define MIPID_CMD_READ_DISP_BRIGHTNESS 0x52 +#define MIPID_CMD_WRITE_CTRL_DISP 0x53 + +#define CTRL_DISP_BRIGHTNESS_CTRL_ON (1 << 5) +#define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON (1 << 4) +#define CTRL_DISP_BACKLIGHT_ON (1 << 2) +#define CTRL_DISP_AUTO_BRIGHTNESS_ON (1 << 1) + +#define MIPID_CMD_READ_CTRL_DISP 0x54 +#define MIPID_CMD_WRITE_CABC 0x55 +#define MIPID_CMD_READ_CABC 0x56 + +#define MIPID_VER_LPH8923 3 +#define MIPID_VER_LS041Y3 4 +#define MIPID_VER_L4F00311 8 +#define MIPID_VER_ACX565AKM 9 + +struct acx565akm_device { + char *name; + int enabled; + int model; + int revision; + u8 display_id[3]; + unsigned has_bc:1; + unsigned has_cabc:1; + unsigned cabc_mode; + unsigned long hw_guard_end; /* next value of jiffies + when we can issue the + next sleep in/out command */ + unsigned long hw_guard_wait; /* max guard time in jiffies */ + + struct spi_device *spi; + struct mutex mutex; + + struct omap_dss_device *dssdev; + struct backlight_device *bl_dev; +}; + +static struct acx565akm_device acx_dev; +static int acx565akm_bl_update_status(struct backlight_device *dev); + +/*--------------------MIPID interface-----------------------------*/ + +static void acx565akm_transfer(struct acx565akm_device *md, int cmd, + const u8 *wbuf, int wlen, u8 *rbuf, int rlen) +{ + struct spi_message m; + struct spi_transfer *x, xfer[5]; + int r; + + BUG_ON(md->spi == NULL); + + spi_message_init(&m); + + memset(xfer, 0, sizeof(xfer)); + x = &xfer[0]; + + cmd &= 0xff; + x->tx_buf = &cmd; + x->bits_per_word = 9; + x->len = 2; + + if (rlen > 1 && wlen == 0) { + /* + * Between the command and the response data there is a + * dummy clock cycle. Add an extra bit after the command + * word to account for this. + */ + x->bits_per_word = 10; + cmd <<= 1; + } + spi_message_add_tail(x, &m); + + if (wlen) { + x++; + x->tx_buf = wbuf; + x->len = wlen; + x->bits_per_word = 9; + spi_message_add_tail(x, &m); + } + + if (rlen) { + x++; + x->rx_buf = rbuf; + x->len = rlen; + spi_message_add_tail(x, &m); + } + + r = spi_sync(md->spi, &m); + if (r < 0) + dev_dbg(&md->spi->dev, "spi_sync %d\n", r); +} + +static inline void acx565akm_cmd(struct acx565akm_device *md, int cmd) +{ + acx565akm_transfer(md, cmd, NULL, 0, NULL, 0); +} + +static inline void acx565akm_write(struct acx565akm_device *md, + int reg, const u8 *buf, int len) +{ + acx565akm_transfer(md, reg, buf, len, NULL, 0); +} + +static inline void acx565akm_read(struct acx565akm_device *md, + int reg, u8 *buf, int len) +{ + acx565akm_transfer(md, reg, NULL, 0, buf, len); +} + +static void hw_guard_start(struct acx565akm_device *md, int guard_msec) +{ + md->hw_guard_wait = msecs_to_jiffies(guard_msec); + md->hw_guard_end = jiffies + md->hw_guard_wait; +} + +static void hw_guard_wait(struct acx565akm_device *md) +{ + unsigned long wait = md->hw_guard_end - jiffies; + + if ((long)wait > 0 && wait <= md->hw_guard_wait) { + set_current_state(TASK_UNINTERRUPTIBLE); + schedule_timeout(wait); + } +} + +/*----------------------MIPID wrappers----------------------------*/ + +static void set_sleep_mode(struct acx565akm_device *md, int on) +{ + int cmd; + + if (on) + cmd = MIPID_CMD_SLEEP_IN; + else + cmd = MIPID_CMD_SLEEP_OUT; + /* + * We have to keep 120msec between sleep in/out commands. + * (8.2.15, 8.2.16). + */ + hw_guard_wait(md); + acx565akm_cmd(md, cmd); + hw_guard_start(md, 120); +} + +static void set_display_state(struct acx565akm_device *md, int enabled) +{ + int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF; + + acx565akm_cmd(md, cmd); +} + +static int panel_enabled(struct acx565akm_device *md) +{ + u32 disp_status; + int enabled; + + acx565akm_read(md, MIPID_CMD_READ_DISP_STATUS, (u8 *)&disp_status, 4); + disp_status = __be32_to_cpu(disp_status); + enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10)); + dev_dbg(&md->spi->dev, + "LCD panel %senabled by bootloader (status 0x%04x)\n", + enabled ? "" : "not ", disp_status); + return enabled; +} + +static int panel_detect(struct acx565akm_device *md) +{ + acx565akm_read(md, MIPID_CMD_READ_DISP_ID, md->display_id, 3); + dev_dbg(&md->spi->dev, "MIPI display ID: %02x%02x%02x\n", + md->display_id[0], md->display_id[1], md->display_id[2]); + + switch (md->display_id[0]) { + case 0x10: + md->model = MIPID_VER_ACX565AKM; + md->name = "acx565akm"; + md->has_bc = 1; + md->has_cabc = 1; + break; + case 0x29: + md->model = MIPID_VER_L4F00311; + md->name = "l4f00311"; + break; + case 0x45: + md->model = MIPID_VER_LPH8923; + md->name = "lph8923"; + break; + case 0x83: + md->model = MIPID_VER_LS041Y3; + md->name = "ls041y3"; + break; + default: + md->name = "unknown"; + dev_err(&md->spi->dev, "invalid display ID\n"); + return -ENODEV; + } + + md->revision = md->display_id[1]; + + dev_info(&md->spi->dev, "omapfb: %s rev %02x LCD detected\n", + md->name, md->revision); + + return 0; +} + +/*----------------------Backlight Control-------------------------*/ + +static void enable_backlight_ctrl(struct acx565akm_device *md, int enable) +{ + u16 ctrl; + + acx565akm_read(md, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1); + if (enable) { + ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON | + CTRL_DISP_BACKLIGHT_ON; + } else { + ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON | + CTRL_DISP_BACKLIGHT_ON); + } + + ctrl |= 1 << 8; + acx565akm_write(md, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2); +} + +static void set_cabc_mode(struct acx565akm_device *md, unsigned mode) +{ + u16 cabc_ctrl; + + md->cabc_mode = mode; + if (!md->enabled) + return; + cabc_ctrl = 0; + acx565akm_read(md, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1); + cabc_ctrl &= ~3; + cabc_ctrl |= (1 << 8) | (mode & 3); + acx565akm_write(md, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2); +} + +static unsigned get_cabc_mode(struct acx565akm_device *md) +{ + return md->cabc_mode; +} + +static unsigned get_hw_cabc_mode(struct acx565akm_device *md) +{ + u8 cabc_ctrl; + + acx565akm_read(md, MIPID_CMD_READ_CABC, &cabc_ctrl, 1); + return cabc_ctrl & 3; +} + +static void acx565akm_set_brightness(struct acx565akm_device *md, int level) +{ + int bv; + + bv = level | (1 << 8); + acx565akm_write(md, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2); + + if (level) + enable_backlight_ctrl(md, 1); + else + enable_backlight_ctrl(md, 0); +} + +static int acx565akm_get_actual_brightness(struct acx565akm_device *md) +{ + u8 bv; + + acx565akm_read(md, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1); + + return bv; +} + + +static int acx565akm_bl_update_status(struct backlight_device *dev) +{ + struct acx565akm_device *md = dev_get_drvdata(&dev->dev); + int r; + int level; + + dev_dbg(&md->spi->dev, "%s\n", __func__); + + mutex_lock(&md->mutex); + + if (dev->props.fb_blank == FB_BLANK_UNBLANK && + dev->props.power == FB_BLANK_UNBLANK) + level = dev->props.brightness; + else + level = 0; + + r = 0; + if (md->has_bc) + acx565akm_set_brightness(md, level); + else if (md->dssdev->set_backlight) + r = md->dssdev->set_backlight(md->dssdev, level); + else + r = -ENODEV; + + mutex_unlock(&md->mutex); + + return r; +} + +static int acx565akm_bl_get_intensity(struct backlight_device *dev) +{ + struct acx565akm_device *md = dev_get_drvdata(&dev->dev); + + dev_dbg(&dev->dev, "%s\n", __func__); + + if (!md->has_bc && md->dssdev->set_backlight == NULL) + return -ENODEV; + + if (dev->props.fb_blank == FB_BLANK_UNBLANK && + dev->props.power == FB_BLANK_UNBLANK) { + if (md->has_bc) + return acx565akm_get_actual_brightness(md); + else + return dev->props.brightness; + } + + return 0; +} + +static const struct backlight_ops acx565akm_bl_ops = { + .get_brightness = acx565akm_bl_get_intensity, + .update_status = acx565akm_bl_update_status, +}; + +/*--------------------Auto Brightness control via Sysfs---------------------*/ + +static const char *cabc_modes[] = { + "off", /* always used when CABC is not supported */ + "ui", + "still-image", + "moving-image", +}; + +static ssize_t show_cabc_mode(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct acx565akm_device *md = dev_get_drvdata(dev); + const char *mode_str; + int mode; + int len; + + if (!md->has_cabc) + mode = 0; + else + mode = get_cabc_mode(md); + mode_str = "unknown"; + if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes)) + mode_str = cabc_modes[mode]; + len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str); + + return len < PAGE_SIZE - 1 ? len : |