| spi.c (b5e3cf410b486a2415ff09b12f3ef18aba9f53ff) | spi.c (f9481b08220d7dc1ff21e296a330ee8b721b44e4) |
|---|---|
| 1// SPDX-License-Identifier: GPL-2.0-or-later 2// SPI init/core code 3// 4// Copyright (C) 2005 David Brownell 5// Copyright (C) 2008 Secret Lab Technologies Ltd. 6 7#include <linux/kernel.h> 8#include <linux/device.h> --- 2361 unchanged lines hidden (view full) --- 2370 /* 2371 * Make sure all necessary hooks are implemented before registering 2372 * the SPI controller. 2373 */ 2374 status = spi_controller_check_ops(ctlr); 2375 if (status) 2376 return status; 2377 | 1// SPDX-License-Identifier: GPL-2.0-or-later 2// SPI init/core code 3// 4// Copyright (C) 2005 David Brownell 5// Copyright (C) 2008 Secret Lab Technologies Ltd. 6 7#include <linux/kernel.h> 8#include <linux/device.h> --- 2361 unchanged lines hidden (view full) --- 2370 /* 2371 * Make sure all necessary hooks are implemented before registering 2372 * the SPI controller. 2373 */ 2374 status = spi_controller_check_ops(ctlr); 2375 if (status) 2376 return status; 2377 |
| 2378 /* even if it's just one always-selected device, there must 2379 * be at least one chipselect 2380 */ 2381 if (ctlr->num_chipselect == 0) 2382 return -EINVAL; | |
| 2383 if (ctlr->bus_num >= 0) { 2384 /* devices with a fixed bus num must check-in with the num */ 2385 mutex_lock(&board_lock); 2386 id = idr_alloc(&spi_master_idr, ctlr, ctlr->bus_num, 2387 ctlr->bus_num + 1, GFP_KERNEL); 2388 mutex_unlock(&board_lock); 2389 if (WARN(id < 0, "couldn't get idr")) 2390 return id == -ENOSPC ? -EBUSY : id; --- 54 unchanged lines hidden (view full) --- 2445 } else { 2446 /* Legacy code path for GPIOs from DT */ 2447 status = of_spi_register_master(ctlr); 2448 if (status) 2449 return status; 2450 } 2451 } 2452 | 2378 if (ctlr->bus_num >= 0) { 2379 /* devices with a fixed bus num must check-in with the num */ 2380 mutex_lock(&board_lock); 2381 id = idr_alloc(&spi_master_idr, ctlr, ctlr->bus_num, 2382 ctlr->bus_num + 1, GFP_KERNEL); 2383 mutex_unlock(&board_lock); 2384 if (WARN(id < 0, "couldn't get idr")) 2385 return id == -ENOSPC ? -EBUSY : id; --- 54 unchanged lines hidden (view full) --- 2440 } else { 2441 /* Legacy code path for GPIOs from DT */ 2442 status = of_spi_register_master(ctlr); 2443 if (status) 2444 return status; 2445 } 2446 } 2447 |
| 2448 /* 2449 * Even if it's just one always-selected device, there must 2450 * be at least one chipselect. 2451 */ 2452 if (!ctlr->num_chipselect) 2453 return -EINVAL; 2454 |
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| 2453 status = device_add(&ctlr->dev); 2454 if (status < 0) { 2455 /* free bus id */ 2456 mutex_lock(&board_lock); 2457 idr_remove(&spi_master_idr, ctlr->bus_num); 2458 mutex_unlock(&board_lock); 2459 goto done; 2460 } --- 1389 unchanged lines hidden --- | 2455 status = device_add(&ctlr->dev); 2456 if (status < 0) { 2457 /* free bus id */ 2458 mutex_lock(&board_lock); 2459 idr_remove(&spi_master_idr, ctlr->bus_num); 2460 mutex_unlock(&board_lock); 2461 goto done; 2462 } --- 1389 unchanged lines hidden --- |