From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Reinecke Subject: [PATCH] spi-orion: convert to new infrastructure Date: Tue, 12 Jun 2012 15:57:40 +0200 Message-ID: <1339509460-62258-1-git-send-email-hare@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, Hannes Reinecke To: Grant Likely Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: spi-devel-general-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-spi.vger.kernel.org Get rid of the 'master is unqueued' warning messages during boot. Signed-off-by: Hannes Reinecke --- drivers/spi/spi-orion.c | 147 ++++++++++++++++------------------------------- 1 files changed, 49 insertions(+), 98 deletions(-) diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c index dfd04e9..58e703f 100644 --- a/drivers/spi/spi-orion.c +++ b/drivers/spi/spi-orion.c @@ -35,22 +35,14 @@ #define ORION_SPI_CLK_PRESCALE_MASK 0x1F struct orion_spi { - struct work_struct work; - - /* Lock access to transfer list. */ - spinlock_t lock; - - struct list_head msg_queue; struct spi_master *master; void __iomem *base; unsigned int max_speed; unsigned int min_speed; struct orion_spi_info *spi_info; - struct clk *clk; + struct clk *clk; }; -static struct workqueue_struct *orion_spi_wq; - static inline void __iomem *spi_reg(struct orion_spi *orion_spi, u32 reg) { return orion_spi->base + reg; @@ -277,73 +269,53 @@ out: } -static void orion_spi_work(struct work_struct *work) +static void orion_spi_work(struct orion_spi *orion_spi, struct spi_message *m) { - struct orion_spi *orion_spi = - container_of(work, struct orion_spi, work); - - spin_lock_irq(&orion_spi->lock); - while (!list_empty(&orion_spi->msg_queue)) { - struct spi_message *m; - struct spi_device *spi; - struct spi_transfer *t = NULL; - int par_override = 0; - int status = 0; - int cs_active = 0; - - m = container_of(orion_spi->msg_queue.next, struct spi_message, - queue); - - list_del_init(&m->queue); - spin_unlock_irq(&orion_spi->lock); - - spi = m->spi; - - /* Load defaults */ - status = orion_spi_setup_transfer(spi, NULL); - - if (status < 0) - goto msg_done; - - list_for_each_entry(t, &m->transfers, transfer_list) { - if (par_override || t->speed_hz || t->bits_per_word) { - par_override = 1; - status = orion_spi_setup_transfer(spi, t); - if (status < 0) - break; - if (!t->speed_hz && !t->bits_per_word) - par_override = 0; - } - - if (!cs_active) { - orion_spi_set_cs(orion_spi, 1); - cs_active = 1; - } - - if (t->len) - m->actual_length += - orion_spi_write_read(spi, t); - - if (t->delay_usecs) - udelay(t->delay_usecs); - - if (t->cs_change) { - orion_spi_set_cs(orion_spi, 0); - cs_active = 0; - } + struct spi_device *spi; + struct spi_transfer *t = NULL; + int par_override = 0; + int status = 0; + int cs_active = 0; + + spi = m->spi; + + /* Load defaults */ + status = orion_spi_setup_transfer(spi, NULL); + if (status < 0) + goto msg_done; + + list_for_each_entry(t, &m->transfers, transfer_list) { + if (par_override || t->speed_hz || t->bits_per_word) { + par_override = 1; + status = orion_spi_setup_transfer(spi, t); + if (status < 0) + break; + if (!t->speed_hz && !t->bits_per_word) + par_override = 0; } -msg_done: - if (cs_active) - orion_spi_set_cs(orion_spi, 0); + if (!cs_active) { + orion_spi_set_cs(orion_spi, 1); + cs_active = 1; + } + + if (t->len) + m->actual_length += orion_spi_write_read(spi, t); - m->status = status; - m->complete(m->context); + if (t->delay_usecs) + udelay(t->delay_usecs); - spin_lock_irq(&orion_spi->lock); + if (t->cs_change) { + orion_spi_set_cs(orion_spi, 0); + cs_active = 0; + } } - spin_unlock_irq(&orion_spi->lock); +msg_done: + if (cs_active) + orion_spi_set_cs(orion_spi, 0); + + m->status = status; } static int __init orion_spi_reset(struct orion_spi *orion_spi) @@ -376,23 +348,22 @@ static int orion_spi_setup(struct spi_device *spi) return 0; } -static int orion_spi_transfer(struct spi_device *spi, struct spi_message *m) +static int orion_spi_transfer_one_message(struct spi_master *spi, + struct spi_message *m) { struct orion_spi *orion_spi; struct spi_transfer *t = NULL; - unsigned long flags; + orion_spi = spi_master_get_devdata(spi); m->actual_length = 0; m->status = 0; /* reject invalid messages and transfers */ - if (list_empty(&m->transfers) || !m->complete) + if (list_empty(&m->transfers)) return -EINVAL; - orion_spi = spi_master_get_devdata(spi->master); - list_for_each_entry(t, &m->transfers, transfer_list) { - unsigned int bits_per_word = spi->bits_per_word; + unsigned int bits_per_word = m->spi->bits_per_word; if (t->tx_buf == NULL && t->rx_buf == NULL && t->len) { dev_err(&spi->dev, @@ -430,18 +401,13 @@ static int orion_spi_transfer(struct spi_device *spi, struct spi_message *m) } } - - spin_lock_irqsave(&orion_spi->lock, flags); - list_add_tail(&m->queue, &orion_spi->msg_queue); - queue_work(orion_spi_wq, &orion_spi->work); - spin_unlock_irqrestore(&orion_spi->lock, flags); + orion_spi_work(orion_spi, m); + spi_finalize_current_message(spi); return 0; msg_rejected: /* Message rejected and not queued */ m->status = -EINVAL; - if (m->complete) - m->complete(m->context); return -EINVAL; } @@ -469,7 +435,7 @@ static int __init orion_spi_probe(struct platform_device *pdev) master->mode_bits = 0; master->setup = orion_spi_setup; - master->transfer = orion_spi_transfer; + master->transfer_one_message = orion_spi_transfer_one_message; master->num_chipselect = ORION_NUM_CHIPSELECTS; dev_set_drvdata(&pdev->dev, master); @@ -503,11 +469,6 @@ static int __init orion_spi_probe(struct platform_device *pdev) } spi->base = ioremap(r->start, SZ_1K); - INIT_WORK(&spi->work, orion_spi_work); - - spin_lock_init(&spi->lock); - INIT_LIST_HEAD(&spi->msg_queue); - if (orion_spi_reset(spi) < 0) goto out_rel_mem; @@ -537,8 +498,6 @@ static int __exit orion_spi_remove(struct platform_device *pdev) master = dev_get_drvdata(&pdev->dev); spi = spi_master_get_devdata(master); - cancel_work_sync(&spi->work); - clk_disable_unprepare(spi->clk); clk_put(spi->clk); @@ -562,21 +521,13 @@ static struct platform_driver orion_spi_driver = { static int __init orion_spi_init(void) { - orion_spi_wq = create_singlethread_workqueue( - orion_spi_driver.driver.name); - if (orion_spi_wq == NULL) - return -ENOMEM; - return platform_driver_probe(&orion_spi_driver, orion_spi_probe); } module_init(orion_spi_init); static void __exit orion_spi_exit(void) { - flush_workqueue(orion_spi_wq); platform_driver_unregister(&orion_spi_driver); - - destroy_workqueue(orion_spi_wq); } module_exit(orion_spi_exit); -- 1.7.4.2 ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. 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