diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-axi-spi-engine.c | 40 |
1 files changed, 17 insertions, 23 deletions
diff --git a/drivers/spi/spi-axi-spi-engine.c b/drivers/spi/spi-axi-spi-engine.c index ca66d202f0e2..6177c1a8d56e 100644 --- a/drivers/spi/spi-axi-spi-engine.c +++ b/drivers/spi/spi-axi-spi-engine.c @@ -109,6 +109,7 @@ struct spi_engine { spinlock_t lock; void __iomem *base; + struct spi_engine_message_state msg_state; struct completion msg_complete; unsigned int int_enable; }; @@ -499,17 +500,11 @@ static irqreturn_t spi_engine_irq(int irq, void *devid) return IRQ_HANDLED; } -static int spi_engine_prepare_message(struct spi_controller *host, - struct spi_message *msg) +static int spi_engine_optimize_message(struct spi_message *msg) { struct spi_engine_program p_dry, *p; - struct spi_engine_message_state *st; size_t size; - st = kzalloc(sizeof(*st), GFP_KERNEL); - if (!st) - return -ENOMEM; - spi_engine_precompile_message(msg); p_dry.length = 0; @@ -517,31 +512,22 @@ static int spi_engine_prepare_message(struct spi_controller *host, size = sizeof(*p->instructions) * (p_dry.length + 1); p = kzalloc(sizeof(*p) + size, GFP_KERNEL); - if (!p) { - kfree(st); + if (!p) return -ENOMEM; - } spi_engine_compile_message(msg, false, p); spi_engine_program_add_cmd(p, false, SPI_ENGINE_CMD_SYNC( AXI_SPI_ENGINE_CUR_MSG_SYNC_ID)); - st->p = p; - st->cmd_buf = p->instructions; - st->cmd_length = p->length; - msg->state = st; + msg->opt_state = p; return 0; } -static int spi_engine_unprepare_message(struct spi_controller *host, - struct spi_message *msg) +static int spi_engine_unoptimize_message(struct spi_message *msg) { - struct spi_engine_message_state *st = msg->state; - - kfree(st->p); - kfree(st); + kfree(msg->opt_state); return 0; } @@ -550,10 +536,18 @@ static int spi_engine_transfer_one_message(struct spi_controller *host, struct spi_message *msg) { struct spi_engine *spi_engine = spi_controller_get_devdata(host); - struct spi_engine_message_state *st = msg->state; + struct spi_engine_message_state *st = &spi_engine->msg_state; + struct spi_engine_program *p = msg->opt_state; unsigned int int_enable = 0; unsigned long flags; + /* reinitialize message state for this transfer */ + memset(st, 0, sizeof(*st)); + st->p = p; + st->cmd_buf = p->instructions; + st->cmd_length = p->length; + msg->state = st; + reinit_completion(&spi_engine->msg_complete); spin_lock_irqsave(&spi_engine->lock, flags); @@ -658,8 +652,8 @@ static int spi_engine_probe(struct platform_device *pdev) host->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32); host->max_speed_hz = clk_get_rate(spi_engine->ref_clk) / 2; host->transfer_one_message = spi_engine_transfer_one_message; - host->prepare_message = spi_engine_prepare_message; - host->unprepare_message = spi_engine_unprepare_message; + host->optimize_message = spi_engine_optimize_message; + host->unoptimize_message = spi_engine_unoptimize_message; host->num_chipselect = 8; if (host->max_speed_hz == 0) |