~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/linux/mmc/host.h

Version: ~ [ linux-5.6-rc1 ] ~ [ linux-5.5.2 ] ~ [ linux-5.4.17 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.102 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.170 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.213 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.213 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.81 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  *  linux/include/linux/mmc/host.h
  3  *
  4  * This program is free software; you can redistribute it and/or modify
  5  * it under the terms of the GNU General Public License version 2 as
  6  * published by the Free Software Foundation.
  7  *
  8  *  Host driver specific definitions.
  9  */
 10 #ifndef LINUX_MMC_HOST_H
 11 #define LINUX_MMC_HOST_H
 12 
 13 #include <linux/leds.h>
 14 #include <linux/mutex.h>
 15 #include <linux/sched.h>
 16 #include <linux/device.h>
 17 #include <linux/fault-inject.h>
 18 
 19 #include <linux/mmc/core.h>
 20 #include <linux/mmc/pm.h>
 21 
 22 struct mmc_ios {
 23         unsigned int    clock;                  /* clock rate */
 24         unsigned short  vdd;
 25 
 26 /* vdd stores the bit number of the selected voltage range from below. */
 27 
 28         unsigned char   bus_mode;               /* command output mode */
 29 
 30 #define MMC_BUSMODE_OPENDRAIN   1
 31 #define MMC_BUSMODE_PUSHPULL    2
 32 
 33         unsigned char   chip_select;            /* SPI chip select */
 34 
 35 #define MMC_CS_DONTCARE         0
 36 #define MMC_CS_HIGH             1
 37 #define MMC_CS_LOW              2
 38 
 39         unsigned char   power_mode;             /* power supply mode */
 40 
 41 #define MMC_POWER_OFF           0
 42 #define MMC_POWER_UP            1
 43 #define MMC_POWER_ON            2
 44 
 45         unsigned char   bus_width;              /* data bus width */
 46 
 47 #define MMC_BUS_WIDTH_1         0
 48 #define MMC_BUS_WIDTH_4         2
 49 #define MMC_BUS_WIDTH_8         3
 50 
 51         unsigned char   timing;                 /* timing specification used */
 52 
 53 #define MMC_TIMING_LEGACY       0
 54 #define MMC_TIMING_MMC_HS       1
 55 #define MMC_TIMING_SD_HS        2
 56 #define MMC_TIMING_UHS_SDR12    3
 57 #define MMC_TIMING_UHS_SDR25    4
 58 #define MMC_TIMING_UHS_SDR50    5
 59 #define MMC_TIMING_UHS_SDR104   6
 60 #define MMC_TIMING_UHS_DDR50    7
 61 #define MMC_TIMING_MMC_HS200    8
 62 
 63 #define MMC_SDR_MODE            0
 64 #define MMC_1_2V_DDR_MODE       1
 65 #define MMC_1_8V_DDR_MODE       2
 66 #define MMC_1_2V_SDR_MODE       3
 67 #define MMC_1_8V_SDR_MODE       4
 68 
 69         unsigned char   signal_voltage;         /* signalling voltage (1.8V or 3.3V) */
 70 
 71 #define MMC_SIGNAL_VOLTAGE_330  0
 72 #define MMC_SIGNAL_VOLTAGE_180  1
 73 #define MMC_SIGNAL_VOLTAGE_120  2
 74 
 75         unsigned char   drv_type;               /* driver type (A, B, C, D) */
 76 
 77 #define MMC_SET_DRIVER_TYPE_B   0
 78 #define MMC_SET_DRIVER_TYPE_A   1
 79 #define MMC_SET_DRIVER_TYPE_C   2
 80 #define MMC_SET_DRIVER_TYPE_D   3
 81 };
 82 
 83 struct mmc_host_ops {
 84         /*
 85          * 'enable' is called when the host is claimed and 'disable' is called
 86          * when the host is released. 'enable' and 'disable' are deprecated.
 87          */
 88         int (*enable)(struct mmc_host *host);
 89         int (*disable)(struct mmc_host *host);
 90         /*
 91          * It is optional for the host to implement pre_req and post_req in
 92          * order to support double buffering of requests (prepare one
 93          * request while another request is active).
 94          * pre_req() must always be followed by a post_req().
 95          * To undo a call made to pre_req(), call post_req() with
 96          * a nonzero err condition.
 97          */
 98         void    (*post_req)(struct mmc_host *host, struct mmc_request *req,
 99                             int err);
100         void    (*pre_req)(struct mmc_host *host, struct mmc_request *req,
101                            bool is_first_req);
102         void    (*request)(struct mmc_host *host, struct mmc_request *req);
103         /*
104          * Avoid calling these three functions too often or in a "fast path",
105          * since underlaying controller might implement them in an expensive
106          * and/or slow way.
107          *
108          * Also note that these functions might sleep, so don't call them
109          * in the atomic contexts!
110          *
111          * Return values for the get_ro callback should be:
112          *   0 for a read/write card
113          *   1 for a read-only card
114          *   -ENOSYS when not supported (equal to NULL callback)
115          *   or a negative errno value when something bad happened
116          *
117          * Return values for the get_cd callback should be:
118          *   0 for a absent card
119          *   1 for a present card
120          *   -ENOSYS when not supported (equal to NULL callback)
121          *   or a negative errno value when something bad happened
122          */
123         void    (*set_ios)(struct mmc_host *host, struct mmc_ios *ios);
124         int     (*get_ro)(struct mmc_host *host);
125         int     (*get_cd)(struct mmc_host *host);
126 
127         void    (*enable_sdio_irq)(struct mmc_host *host, int enable);
128 
129         /* optional callback for HC quirks */
130         void    (*init_card)(struct mmc_host *host, struct mmc_card *card);
131 
132         int     (*start_signal_voltage_switch)(struct mmc_host *host, struct mmc_ios *ios);
133 
134         /* Check if the card is pulling dat[0:3] low */
135         int     (*card_busy)(struct mmc_host *host);
136 
137         /* The tuning command opcode value is different for SD and eMMC cards */
138         int     (*execute_tuning)(struct mmc_host *host, u32 opcode);
139         int     (*select_drive_strength)(unsigned int max_dtr, int host_drv, int card_drv);
140         void    (*hw_reset)(struct mmc_host *host);
141         void    (*card_event)(struct mmc_host *host);
142 };
143 
144 struct mmc_card;
145 struct device;
146 
147 struct mmc_async_req {
148         /* active mmc request */
149         struct mmc_request      *mrq;
150         /*
151          * Check error status of completed mmc request.
152          * Returns 0 if success otherwise non zero.
153          */
154         int (*err_check) (struct mmc_card *, struct mmc_async_req *);
155 };
156 
157 /**
158  * struct mmc_slot - MMC slot functions
159  *
160  * @cd_irq:             MMC/SD-card slot hotplug detection IRQ or -EINVAL
161  * @lock:               protect the @handler_priv pointer
162  * @handler_priv:       MMC/SD-card slot context
163  *
164  * Some MMC/SD host controllers implement slot-functions like card and
165  * write-protect detection natively. However, a large number of controllers
166  * leave these functions to the CPU. This struct provides a hook to attach
167  * such slot-function drivers.
168  */
169 struct mmc_slot {
170         int cd_irq;
171         struct mutex lock;
172         void *handler_priv;
173 };
174 
175 /**
176  * mmc_context_info - synchronization details for mmc context
177  * @is_done_rcv         wake up reason was done request
178  * @is_new_req          wake up reason was new request
179  * @is_waiting_last_req mmc context waiting for single running request
180  * @wait                wait queue
181  * @lock                lock to protect data fields
182  */
183 struct mmc_context_info {
184         bool                    is_done_rcv;
185         bool                    is_new_req;
186         bool                    is_waiting_last_req;
187         wait_queue_head_t       wait;
188         spinlock_t              lock;
189 };
190 
191 struct regulator;
192 
193 struct mmc_supply {
194         struct regulator *vmmc;         /* Card power supply */
195         struct regulator *vqmmc;        /* Optional Vccq supply */
196 };
197 
198 struct mmc_host {
199         struct device           *parent;
200         struct device           class_dev;
201         int                     index;
202         const struct mmc_host_ops *ops;
203         unsigned int            f_min;
204         unsigned int            f_max;
205         unsigned int            f_init;
206         u32                     ocr_avail;
207         u32                     ocr_avail_sdio; /* SDIO-specific OCR */
208         u32                     ocr_avail_sd;   /* SD-specific OCR */
209         u32                     ocr_avail_mmc;  /* MMC-specific OCR */
210         struct notifier_block   pm_notify;
211         u32                     max_current_330;
212         u32                     max_current_300;
213         u32                     max_current_180;
214 
215 #define MMC_VDD_165_195         0x00000080      /* VDD voltage 1.65 - 1.95 */
216 #define MMC_VDD_20_21           0x00000100      /* VDD voltage 2.0 ~ 2.1 */
217 #define MMC_VDD_21_22           0x00000200      /* VDD voltage 2.1 ~ 2.2 */
218 #define MMC_VDD_22_23           0x00000400      /* VDD voltage 2.2 ~ 2.3 */
219 #define MMC_VDD_23_24           0x00000800      /* VDD voltage 2.3 ~ 2.4 */
220 #define MMC_VDD_24_25           0x00001000      /* VDD voltage 2.4 ~ 2.5 */
221 #define MMC_VDD_25_26           0x00002000      /* VDD voltage 2.5 ~ 2.6 */
222 #define MMC_VDD_26_27           0x00004000      /* VDD voltage 2.6 ~ 2.7 */
223 #define MMC_VDD_27_28           0x00008000      /* VDD voltage 2.7 ~ 2.8 */
224 #define MMC_VDD_28_29           0x00010000      /* VDD voltage 2.8 ~ 2.9 */
225 #define MMC_VDD_29_30           0x00020000      /* VDD voltage 2.9 ~ 3.0 */
226 #define MMC_VDD_30_31           0x00040000      /* VDD voltage 3.0 ~ 3.1 */
227 #define MMC_VDD_31_32           0x00080000      /* VDD voltage 3.1 ~ 3.2 */
228 #define MMC_VDD_32_33           0x00100000      /* VDD voltage 3.2 ~ 3.3 */
229 #define MMC_VDD_33_34           0x00200000      /* VDD voltage 3.3 ~ 3.4 */
230 #define MMC_VDD_34_35           0x00400000      /* VDD voltage 3.4 ~ 3.5 */
231 #define MMC_VDD_35_36           0x00800000      /* VDD voltage 3.5 ~ 3.6 */
232 
233         u32                     caps;           /* Host capabilities */
234 
235 #define MMC_CAP_4_BIT_DATA      (1 << 0)        /* Can the host do 4 bit transfers */
236 #define MMC_CAP_MMC_HIGHSPEED   (1 << 1)        /* Can do MMC high-speed timing */
237 #define MMC_CAP_SD_HIGHSPEED    (1 << 2)        /* Can do SD high-speed timing */
238 #define MMC_CAP_SDIO_IRQ        (1 << 3)        /* Can signal pending SDIO IRQs */
239 #define MMC_CAP_SPI             (1 << 4)        /* Talks only SPI protocols */
240 #define MMC_CAP_NEEDS_POLL      (1 << 5)        /* Needs polling for card-detection */
241 #define MMC_CAP_8_BIT_DATA      (1 << 6)        /* Can the host do 8 bit transfers */
242 
243 #define MMC_CAP_NONREMOVABLE    (1 << 8)        /* Nonremovable e.g. eMMC */
244 #define MMC_CAP_WAIT_WHILE_BUSY (1 << 9)        /* Waits while card is busy */
245 #define MMC_CAP_ERASE           (1 << 10)       /* Allow erase/trim commands */
246 #define MMC_CAP_1_8V_DDR        (1 << 11)       /* can support */
247                                                 /* DDR mode at 1.8V */
248 #define MMC_CAP_1_2V_DDR        (1 << 12)       /* can support */
249                                                 /* DDR mode at 1.2V */
250 #define MMC_CAP_POWER_OFF_CARD  (1 << 13)       /* Can power off after boot */
251 #define MMC_CAP_BUS_WIDTH_TEST  (1 << 14)       /* CMD14/CMD19 bus width ok */
252 #define MMC_CAP_UHS_SDR12       (1 << 15)       /* Host supports UHS SDR12 mode */
253 #define MMC_CAP_UHS_SDR25       (1 << 16)       /* Host supports UHS SDR25 mode */
254 #define MMC_CAP_UHS_SDR50       (1 << 17)       /* Host supports UHS SDR50 mode */
255 #define MMC_CAP_UHS_SDR104      (1 << 18)       /* Host supports UHS SDR104 mode */
256 #define MMC_CAP_UHS_DDR50       (1 << 19)       /* Host supports UHS DDR50 mode */
257 #define MMC_CAP_DRIVER_TYPE_A   (1 << 23)       /* Host supports Driver Type A */
258 #define MMC_CAP_DRIVER_TYPE_C   (1 << 24)       /* Host supports Driver Type C */
259 #define MMC_CAP_DRIVER_TYPE_D   (1 << 25)       /* Host supports Driver Type D */
260 #define MMC_CAP_CMD23           (1 << 30)       /* CMD23 supported. */
261 #define MMC_CAP_HW_RESET        (1 << 31)       /* Hardware reset */
262 
263         u32                     caps2;          /* More host capabilities */
264 
265 #define MMC_CAP2_BOOTPART_NOACC (1 << 0)        /* Boot partition no access */
266 #define MMC_CAP2_CACHE_CTRL     (1 << 1)        /* Allow cache control */
267 #define MMC_CAP2_POWEROFF_NOTIFY (1 << 2)       /* Notify poweroff supported */
268 #define MMC_CAP2_NO_MULTI_READ  (1 << 3)        /* Multiblock reads don't work */
269 #define MMC_CAP2_NO_SLEEP_CMD   (1 << 4)        /* Don't allow sleep command */
270 #define MMC_CAP2_HS200_1_8V_SDR (1 << 5)        /* can support */
271 #define MMC_CAP2_HS200_1_2V_SDR (1 << 6)        /* can support */
272 #define MMC_CAP2_HS200          (MMC_CAP2_HS200_1_8V_SDR | \
273                                  MMC_CAP2_HS200_1_2V_SDR)
274 #define MMC_CAP2_BROKEN_VOLTAGE (1 << 7)        /* Use the broken voltage */
275 #define MMC_CAP2_DETECT_ON_ERR  (1 << 8)        /* On I/O err check card removal */
276 #define MMC_CAP2_HC_ERASE_SZ    (1 << 9)        /* High-capacity erase size */
277 #define MMC_CAP2_CD_ACTIVE_HIGH (1 << 10)       /* Card-detect signal active high */
278 #define MMC_CAP2_RO_ACTIVE_HIGH (1 << 11)       /* Write-protect signal active high */
279 #define MMC_CAP2_PACKED_RD      (1 << 12)       /* Allow packed read */
280 #define MMC_CAP2_PACKED_WR      (1 << 13)       /* Allow packed write */
281 #define MMC_CAP2_PACKED_CMD     (MMC_CAP2_PACKED_RD | \
282                                  MMC_CAP2_PACKED_WR)
283 
284         mmc_pm_flag_t           pm_caps;        /* supported pm features */
285 
286 #ifdef CONFIG_MMC_CLKGATE
287         int                     clk_requests;   /* internal reference counter */
288         unsigned int            clk_delay;      /* number of MCI clk hold cycles */
289         bool                    clk_gated;      /* clock gated */
290         struct delayed_work     clk_gate_work; /* delayed clock gate */
291         unsigned int            clk_old;        /* old clock value cache */
292         spinlock_t              clk_lock;       /* lock for clk fields */
293         struct mutex            clk_gate_mutex; /* mutex for clock gating */
294         struct device_attribute clkgate_delay_attr;
295         unsigned long           clkgate_delay;
296 #endif
297 
298         /* host specific block data */
299         unsigned int            max_seg_size;   /* see blk_queue_max_segment_size */
300         unsigned short          max_segs;       /* see blk_queue_max_segments */
301         unsigned short          unused;
302         unsigned int            max_req_size;   /* maximum number of bytes in one req */
303         unsigned int            max_blk_size;   /* maximum size of one mmc block */
304         unsigned int            max_blk_count;  /* maximum number of blocks in one req */
305         unsigned int            max_discard_to; /* max. discard timeout in ms */
306 
307         /* private data */
308         spinlock_t              lock;           /* lock for claim and bus ops */
309 
310         struct mmc_ios          ios;            /* current io bus settings */
311         u32                     ocr;            /* the current OCR setting */
312 
313         /* group bitfields together to minimize padding */
314         unsigned int            use_spi_crc:1;
315         unsigned int            claimed:1;      /* host exclusively claimed */
316         unsigned int            bus_dead:1;     /* bus has been released */
317 #ifdef CONFIG_MMC_DEBUG
318         unsigned int            removed:1;      /* host is being removed */
319 #endif
320 
321         int                     rescan_disable; /* disable card detection */
322         int                     rescan_entered; /* used with nonremovable devices */
323 
324         struct mmc_card         *card;          /* device attached to this host */
325 
326         wait_queue_head_t       wq;
327         struct task_struct      *claimer;       /* task that has host claimed */
328         int                     claim_cnt;      /* "claim" nesting count */
329 
330         struct delayed_work     detect;
331         int                     detect_change;  /* card detect flag */
332         struct mmc_slot         slot;
333 
334         const struct mmc_bus_ops *bus_ops;      /* current bus driver */
335         unsigned int            bus_refs;       /* reference counter */
336 
337         unsigned int            sdio_irqs;
338         struct task_struct      *sdio_irq_thread;
339         bool                    sdio_irq_pending;
340         atomic_t                sdio_irq_thread_abort;
341 
342         mmc_pm_flag_t           pm_flags;       /* requested pm features */
343 
344 #ifdef CONFIG_LEDS_TRIGGERS
345         struct led_trigger      *led;           /* activity led */
346 #endif
347 
348 #ifdef CONFIG_REGULATOR
349         bool                    regulator_enabled; /* regulator state */
350 #endif
351         struct mmc_supply       supply;
352 
353         struct dentry           *debugfs_root;
354 
355         struct mmc_async_req    *areq;          /* active async req */
356         struct mmc_context_info context_info;   /* async synchronization info */
357 
358 #ifdef CONFIG_FAIL_MMC_REQUEST
359         struct fault_attr       fail_mmc_request;
360 #endif
361 
362         unsigned int            actual_clock;   /* Actual HC clock rate */
363 
364         unsigned long           private[0] ____cacheline_aligned;
365 };
366 
367 struct mmc_host *mmc_alloc_host(int extra, struct device *);
368 int mmc_add_host(struct mmc_host *);
369 void mmc_remove_host(struct mmc_host *);
370 void mmc_free_host(struct mmc_host *);
371 void mmc_of_parse(struct mmc_host *host);
372 
373 static inline void *mmc_priv(struct mmc_host *host)
374 {
375         return (void *)host->private;
376 }
377 
378 #define mmc_host_is_spi(host)   ((host)->caps & MMC_CAP_SPI)
379 
380 #define mmc_dev(x)      ((x)->parent)
381 #define mmc_classdev(x) (&(x)->class_dev)
382 #define mmc_hostname(x) (dev_name(&(x)->class_dev))
383 
384 int mmc_suspend_host(struct mmc_host *);
385 int mmc_resume_host(struct mmc_host *);
386 
387 int mmc_power_save_host(struct mmc_host *host);
388 int mmc_power_restore_host(struct mmc_host *host);
389 
390 void mmc_detect_change(struct mmc_host *, unsigned long delay);
391 void mmc_request_done(struct mmc_host *, struct mmc_request *);
392 
393 int mmc_cache_ctrl(struct mmc_host *, u8);
394 
395 static inline void mmc_signal_sdio_irq(struct mmc_host *host)
396 {
397         host->ops->enable_sdio_irq(host, 0);
398         host->sdio_irq_pending = true;
399         wake_up_process(host->sdio_irq_thread);
400 }
401 
402 #ifdef CONFIG_REGULATOR
403 int mmc_regulator_get_ocrmask(struct regulator *supply);
404 int mmc_regulator_set_ocr(struct mmc_host *mmc,
405                         struct regulator *supply,
406                         unsigned short vdd_bit);
407 int mmc_regulator_get_supply(struct mmc_host *mmc);
408 #else
409 static inline int mmc_regulator_get_ocrmask(struct regulator *supply)
410 {
411         return 0;
412 }
413 
414 static inline int mmc_regulator_set_ocr(struct mmc_host *mmc,
415                                  struct regulator *supply,
416                                  unsigned short vdd_bit)
417 {
418         return 0;
419 }
420 
421 static inline int mmc_regulator_get_supply(struct mmc_host *mmc)
422 {
423         return 0;
424 }
425 #endif
426 
427 int mmc_card_awake(struct mmc_host *host);
428 int mmc_card_sleep(struct mmc_host *host);
429 int mmc_card_can_sleep(struct mmc_host *host);
430 
431 int mmc_pm_notify(struct notifier_block *notify_block, unsigned long, void *);
432 
433 /* Module parameter */
434 extern bool mmc_assume_removable;
435 
436 static inline int mmc_card_is_removable(struct mmc_host *host)
437 {
438         return !(host->caps & MMC_CAP_NONREMOVABLE) && mmc_assume_removable;
439 }
440 
441 static inline int mmc_card_keep_power(struct mmc_host *host)
442 {
443         return host->pm_flags & MMC_PM_KEEP_POWER;
444 }
445 
446 static inline int mmc_card_wake_sdio_irq(struct mmc_host *host)
447 {
448         return host->pm_flags & MMC_PM_WAKE_SDIO_IRQ;
449 }
450 
451 static inline int mmc_host_cmd23(struct mmc_host *host)
452 {
453         return host->caps & MMC_CAP_CMD23;
454 }
455 
456 static inline int mmc_boot_partition_access(struct mmc_host *host)
457 {
458         return !(host->caps2 & MMC_CAP2_BOOTPART_NOACC);
459 }
460 
461 static inline int mmc_host_uhs(struct mmc_host *host)
462 {
463         return host->caps &
464                 (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
465                  MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 |
466                  MMC_CAP_UHS_DDR50);
467 }
468 
469 static inline int mmc_host_packed_wr(struct mmc_host *host)
470 {
471         return host->caps2 & MMC_CAP2_PACKED_WR;
472 }
473 
474 #ifdef CONFIG_MMC_CLKGATE
475 void mmc_host_clk_hold(struct mmc_host *host);
476 void mmc_host_clk_release(struct mmc_host *host);
477 unsigned int mmc_host_clk_rate(struct mmc_host *host);
478 
479 #else
480 static inline void mmc_host_clk_hold(struct mmc_host *host)
481 {
482 }
483 
484 static inline void mmc_host_clk_release(struct mmc_host *host)
485 {
486 }
487 
488 static inline unsigned int mmc_host_clk_rate(struct mmc_host *host)
489 {
490         return host->ios.clock;
491 }
492 #endif
493 #endif /* LINUX_MMC_HOST_H */
494 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp