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-rw-r--r--drivers/spi/spi-bcm63xx.c16
-rw-r--r--drivers/spi/spi-omap2-mcspi.c64
-rw-r--r--drivers/spi/spi-pl022.c52
-rw-r--r--drivers/spi/spi-s3c64xx.c34
-rw-r--r--drivers/spi/spi.c5
-rw-r--r--drivers/spi/spidev.c10
6 files changed, 109 insertions, 72 deletions
diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c
index a9f4049c6769..6d97047d9242 100644
--- a/drivers/spi/spi-bcm63xx.c
+++ b/drivers/spi/spi-bcm63xx.c
@@ -36,7 +36,6 @@
#include <bcm63xx_dev_spi.h>
#define PFX KBUILD_MODNAME
-#define DRV_VER "0.1.2"
struct bcm63xx_spi {
struct completion done;
@@ -170,13 +169,6 @@ static int bcm63xx_spi_setup(struct spi_device *spi)
return -EINVAL;
}
- ret = bcm63xx_spi_check_transfer(spi, NULL);
- if (ret < 0) {
- dev_err(&spi->dev, "setup: unsupported mode bits %x\n",
- spi->mode & ~MODEBITS);
- return ret;
- }
-
dev_dbg(&spi->dev, "%s, mode %d, %u bits/w, %u nsec/bit\n",
__func__, spi->mode & MODEBITS, spi->bits_per_word, 0);
@@ -441,8 +433,8 @@ static int __devinit bcm63xx_spi_probe(struct platform_device *pdev)
goto out_clk_disable;
}
- dev_info(dev, "at 0x%08x (irq %d, FIFOs size %d) v%s\n",
- r->start, irq, bs->fifo_size, DRV_VER);
+ dev_info(dev, "at 0x%08x (irq %d, FIFOs size %d)\n",
+ r->start, irq, bs->fifo_size);
return 0;
@@ -485,6 +477,8 @@ static int bcm63xx_spi_suspend(struct device *dev)
platform_get_drvdata(to_platform_device(dev));
struct bcm63xx_spi *bs = spi_master_get_devdata(master);
+ spi_master_suspend(master);
+
clk_disable(bs->clk);
return 0;
@@ -498,6 +492,8 @@ static int bcm63xx_spi_resume(struct device *dev)
clk_enable(bs->clk);
+ spi_master_resume(master);
+
return 0;
}
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
index 3542fdc664b1..643e7e27aa47 100644
--- a/drivers/spi/spi-omap2-mcspi.c
+++ b/drivers/spi/spi-omap2-mcspi.c
@@ -130,6 +130,7 @@ struct omap2_mcspi {
struct omap2_mcspi_dma *dma_channels;
struct device *dev;
struct omap2_mcspi_regs ctx;
+ unsigned int pin_dir:1;
};
struct omap2_mcspi_cs {
@@ -323,18 +324,13 @@ static void omap2_mcspi_tx_dma(struct spi_device *spi,
struct omap2_mcspi *mcspi;
struct omap2_mcspi_dma *mcspi_dma;
unsigned int count;
- u8 * rx;
const u8 * tx;
- void __iomem *chstat_reg;
- struct omap2_mcspi_cs *cs = spi->controller_state;
mcspi = spi_master_get_devdata(spi->master);
mcspi_dma = &mcspi->dma_channels[spi->chip_select];
count = xfer->len;
- rx = xfer->rx_buf;
tx = xfer->tx_buf;
- chstat_reg = cs->base + OMAP2_MCSPI_CHSTAT0;
if (mcspi_dma->dma_tx) {
struct dma_async_tx_descriptor *tx;
@@ -359,19 +355,6 @@ static void omap2_mcspi_tx_dma(struct spi_device *spi,
dma_async_issue_pending(mcspi_dma->dma_tx);
omap2_mcspi_set_dma_req(spi, 0, 1);
- wait_for_completion(&mcspi_dma->dma_tx_completion);
- dma_unmap_single(mcspi->dev, xfer->tx_dma, count,
- DMA_TO_DEVICE);
-
- /* for TX_ONLY mode, be sure all words have shifted out */
- if (rx == NULL) {
- if (mcspi_wait_for_reg_bit(chstat_reg,
- OMAP2_MCSPI_CHSTAT_TXS) < 0)
- dev_err(&spi->dev, "TXS timed out\n");
- else if (mcspi_wait_for_reg_bit(chstat_reg,
- OMAP2_MCSPI_CHSTAT_EOT) < 0)
- dev_err(&spi->dev, "EOT timed out\n");
- }
}
static unsigned
@@ -492,6 +475,7 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer)
struct dma_slave_config cfg;
enum dma_slave_buswidth width;
unsigned es;
+ void __iomem *chstat_reg;
mcspi = spi_master_get_devdata(spi->master);
mcspi_dma = &mcspi->dma_channels[spi->chip_select];
@@ -526,8 +510,24 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer)
omap2_mcspi_tx_dma(spi, xfer, cfg);
if (rx != NULL)
- return omap2_mcspi_rx_dma(spi, xfer, cfg, es);
-
+ count = omap2_mcspi_rx_dma(spi, xfer, cfg, es);
+
+ if (tx != NULL) {
+ chstat_reg = cs->base + OMAP2_MCSPI_CHSTAT0;
+ wait_for_completion(&mcspi_dma->dma_tx_completion);
+ dma_unmap_single(mcspi->dev, xfer->tx_dma, xfer->len,
+ DMA_TO_DEVICE);
+
+ /* for TX_ONLY mode, be sure all words have shifted out */
+ if (rx == NULL) {
+ if (mcspi_wait_for_reg_bit(chstat_reg,
+ OMAP2_MCSPI_CHSTAT_TXS) < 0)
+ dev_err(&spi->dev, "TXS timed out\n");
+ else if (mcspi_wait_for_reg_bit(chstat_reg,
+ OMAP2_MCSPI_CHSTAT_EOT) < 0)
+ dev_err(&spi->dev, "EOT timed out\n");
+ }
+ }
return count;
}
@@ -765,8 +765,15 @@ static int omap2_mcspi_setup_transfer(struct spi_device *spi,
/* standard 4-wire master mode: SCK, MOSI/out, MISO/in, nCS
* REVISIT: this controller could support SPI_3WIRE mode.
*/
- l &= ~(OMAP2_MCSPI_CHCONF_IS|OMAP2_MCSPI_CHCONF_DPE1);
- l |= OMAP2_MCSPI_CHCONF_DPE0;
+ if (mcspi->pin_dir == MCSPI_PINDIR_D0_OUT_D1_IN) {
+ l &= ~OMAP2_MCSPI_CHCONF_IS;
+ l &= ~OMAP2_MCSPI_CHCONF_DPE1;
+ l |= OMAP2_MCSPI_CHCONF_DPE0;
+ } else {
+ l |= OMAP2_MCSPI_CHCONF_IS;
+ l |= OMAP2_MCSPI_CHCONF_DPE1;
+ l &= ~OMAP2_MCSPI_CHCONF_DPE0;
+ }
/* wordlength */
l &= ~OMAP2_MCSPI_CHCONF_WL_MASK;
@@ -1167,6 +1174,11 @@ static int __devinit omap2_mcspi_probe(struct platform_device *pdev)
master->cleanup = omap2_mcspi_cleanup;
master->dev.of_node = node;
+ dev_set_drvdata(&pdev->dev, master);
+
+ mcspi = spi_master_get_devdata(master);
+ mcspi->master = master;
+
match = of_match_device(omap_mcspi_of_match, &pdev->dev);
if (match) {
u32 num_cs = 1; /* default number of chipselect */
@@ -1175,19 +1187,17 @@ static int __devinit omap2_mcspi_probe(struct platform_device *pdev)
of_property_read_u32(node, "ti,spi-num-cs", &num_cs);
master->num_chipselect = num_cs;
master->bus_num = bus_num++;
+ if (of_get_property(node, "ti,pindir-d0-in-d1-out", NULL))
+ mcspi->pin_dir = MCSPI_PINDIR_D0_IN_D1_OUT;
} else {
pdata = pdev->dev.platform_data;
master->num_chipselect = pdata->num_cs;
if (pdev->id != -1)
master->bus_num = pdev->id;
+ mcspi->pin_dir = pdata->pin_dir;
}
regs_offset = pdata->regs_offset;
- dev_set_drvdata(&pdev->dev, master);
-
- mcspi = spi_master_get_devdata(master);
- mcspi->master = master;
-
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (r == NULL) {
status = -ENODEV;
diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
index a1db91a99b89..1361868fced7 100644
--- a/drivers/spi/spi-pl022.c
+++ b/drivers/spi/spi-pl022.c
@@ -371,6 +371,7 @@ struct pl022 {
/* Two optional pin states - default & sleep */
struct pinctrl *pinctrl;
struct pinctrl_state *pins_default;
+ struct pinctrl_state *pins_idle;
struct pinctrl_state *pins_sleep;
struct spi_master *master;
struct pl022_ssp_controller *master_info;
@@ -2116,6 +2117,11 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id)
} else
dev_err(dev, "could not get default pinstate\n");
+ pl022->pins_idle = pinctrl_lookup_state(pl022->pinctrl,
+ PINCTRL_STATE_IDLE);
+ if (IS_ERR(pl022->pins_idle))
+ dev_dbg(dev, "could not get idle pinstate\n");
+
pl022->pins_sleep = pinctrl_lookup_state(pl022->pinctrl,
PINCTRL_STATE_SLEEP);
if (IS_ERR(pl022->pins_sleep))
@@ -2246,10 +2252,9 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id)
pm_runtime_set_autosuspend_delay(dev,
platform_info->autosuspend_delay);
pm_runtime_use_autosuspend(dev);
- pm_runtime_put_autosuspend(dev);
- } else {
- pm_runtime_put(dev);
}
+ pm_runtime_put(dev);
+
return 0;
err_spi_register:
@@ -2303,35 +2308,47 @@ pl022_remove(struct amba_device *adev)
* the runtime counterparts to handle external resources like
* clocks, pins and regulators when going to sleep.
*/
-static void pl022_suspend_resources(struct pl022 *pl022)
+static void pl022_suspend_resources(struct pl022 *pl022, bool runtime)
{
int ret;
+ struct pinctrl_state *pins_state;
clk_disable(pl022->clk);
+ pins_state = runtime ? pl022->pins_idle : pl022->pins_sleep;
/* Optionally let pins go into sleep states */
- if (!IS_ERR(pl022->pins_sleep)) {
- ret = pinctrl_select_state(pl022->pinctrl,
- pl022->pins_sleep);
+ if (!IS_ERR(pins_state)) {
+ ret = pinctrl_select_state(pl022->pinctrl, pins_state);
if (ret)
- dev_err(&pl022->adev->dev,
- "could not set pins to sleep state\n");
+ dev_err(&pl022->adev->dev, "could not set %s pins\n",
+ runtime ? "idle" : "sleep");
}
}
-static void pl022_resume_resources(struct pl022 *pl022)
+static void pl022_resume_resources(struct pl022 *pl022, bool runtime)
{
int ret;
/* Optionaly enable pins to be muxed in and configured */
+ /* First go to the default state */
if (!IS_ERR(pl022->pins_default)) {
- ret = pinctrl_select_state(pl022->pinctrl,
- pl022->pins_default);
+ ret = pinctrl_select_state(pl022->pinctrl, pl022->pins_default);
if (ret)
dev_err(&pl022->adev->dev,
"could not set default pins\n");
}
+ if (!runtime) {
+ /* Then let's idle the pins until the next transfer happens */
+ if (!IS_ERR(pl022->pins_idle)) {
+ ret = pinctrl_select_state(pl022->pinctrl,
+ pl022->pins_idle);
+ if (ret)
+ dev_err(&pl022->adev->dev,
+ "could not set idle pins\n");
+ }
+ }
+
clk_enable(pl022->clk);
}
#endif
@@ -2347,7 +2364,9 @@ static int pl022_suspend(struct device *dev)
dev_warn(dev, "cannot suspend master\n");
return ret;
}
- pl022_suspend_resources(pl022);
+
+ pm_runtime_get_sync(dev);
+ pl022_suspend_resources(pl022, false);
dev_dbg(dev, "suspended\n");
return 0;
@@ -2358,7 +2377,8 @@ static int pl022_resume(struct device *dev)
struct pl022 *pl022 = dev_get_drvdata(dev);
int ret;
- pl022_resume_resources(pl022);
+ pl022_resume_resources(pl022, false);
+ pm_runtime_put(dev);
/* Start the queue running */
ret = spi_master_resume(pl022->master);
@@ -2376,7 +2396,7 @@ static int pl022_runtime_suspend(struct device *dev)
{
struct pl022 *pl022 = dev_get_drvdata(dev);
- pl022_suspend_resources(pl022);
+ pl022_suspend_resources(pl022, true);
return 0;
}
@@ -2384,7 +2404,7 @@ static int pl022_runtime_resume(struct device *dev)
{
struct pl022 *pl022 = dev_get_drvdata(dev);
- pl022_resume_resources(pl022);
+ pl022_resume_resources(pl022, true);
return 0;
}
#endif
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 6e7a805d324d..57900a810bf2 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -516,7 +516,7 @@ static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
/* Disable Clock */
if (sdd->port_conf->clk_from_cmu) {
- clk_disable(sdd->src_clk);
+ clk_disable_unprepare(sdd->src_clk);
} else {
val = readl(regs + S3C64XX_SPI_CLK_CFG);
val &= ~S3C64XX_SPI_ENCLK_ENABLE;
@@ -564,7 +564,7 @@ static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
/* There is half-multiplier before the SPI */
clk_set_rate(sdd->src_clk, sdd->cur_speed * 2);
/* Enable Clock */
- clk_enable(sdd->src_clk);
+ clk_prepare_enable(sdd->src_clk);
} else {
/* Configure Clock */
val = readl(regs + S3C64XX_SPI_CLK_CFG);
@@ -1112,7 +1112,7 @@ static int s3c64xx_spi_parse_dt_gpio(struct s3c64xx_spi_driver_data *sdd)
dev_err(dev, "invalid gpio[%d]: %d\n", idx, gpio);
goto free_gpio;
}
-
+ sdd->gpios[idx] = gpio;
ret = gpio_request(gpio, "spi-bus");
if (ret) {
dev_err(dev, "gpio [%d] request failed: %d\n",
@@ -1302,7 +1302,7 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
goto err3;
}
- if (clk_enable(sdd->clk)) {
+ if (clk_prepare_enable(sdd->clk)) {
dev_err(&pdev->dev, "Couldn't enable clock 'spi'\n");
ret = -EBUSY;
goto err4;
@@ -1317,7 +1317,7 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
goto err5;
}
- if (clk_enable(sdd->src_clk)) {
+ if (clk_prepare_enable(sdd->src_clk)) {
dev_err(&pdev->dev, "Couldn't enable clock '%s'\n", clk_name);
ret = -EBUSY;
goto err6;
@@ -1361,11 +1361,11 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
err8:
free_irq(irq, sdd);
err7:
- clk_disable(sdd->src_clk);
+ clk_disable_unprepare(sdd->src_clk);
err6:
clk_put(sdd->src_clk);
err5:
- clk_disable(sdd->clk);
+ clk_disable_unprepare(sdd->clk);
err4:
clk_put(sdd->clk);
err3:
@@ -1393,10 +1393,10 @@ static int s3c64xx_spi_remove(struct platform_device *pdev)
free_irq(platform_get_irq(pdev, 0), sdd);
- clk_disable(sdd->src_clk);
+ clk_disable_unprepare(sdd->src_clk);
clk_put(sdd->src_clk);
- clk_disable(sdd->clk);
+ clk_disable_unprepare(sdd->clk);
clk_put(sdd->clk);
if (!sdd->cntrlr_info->cfg_gpio && pdev->dev.of_node)
@@ -1417,8 +1417,8 @@ static int s3c64xx_spi_suspend(struct device *dev)
spi_master_suspend(master);
/* Disable the clock */
- clk_disable(sdd->src_clk);
- clk_disable(sdd->clk);
+ clk_disable_unprepare(sdd->src_clk);
+ clk_disable_unprepare(sdd->clk);
if (!sdd->cntrlr_info->cfg_gpio && dev->of_node)
s3c64xx_spi_dt_gpio_free(sdd);
@@ -1440,8 +1440,8 @@ static int s3c64xx_spi_resume(struct device *dev)
sci->cfg_gpio();
/* Enable the clock */
- clk_enable(sdd->src_clk);
- clk_enable(sdd->clk);
+ clk_prepare_enable(sdd->src_clk);
+ clk_prepare_enable(sdd->clk);
s3c64xx_spi_hwinit(sdd, sdd->port_id);
@@ -1457,8 +1457,8 @@ static int s3c64xx_spi_runtime_suspend(struct device *dev)
struct spi_master *master = dev_get_drvdata(dev);
struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master);
- clk_disable(sdd->clk);
- clk_disable(sdd->src_clk);
+ clk_disable_unprepare(sdd->clk);
+ clk_disable_unprepare(sdd->src_clk);
return 0;
}
@@ -1468,8 +1468,8 @@ static int s3c64xx_spi_runtime_resume(struct device *dev)
struct spi_master *master = dev_get_drvdata(dev);
struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master);
- clk_enable(sdd->src_clk);
- clk_enable(sdd->clk);
+ clk_prepare_enable(sdd->src_clk);
+ clk_prepare_enable(sdd->clk);
return 0;
}
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 518e5955664c..9fae4a1ecc5a 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1156,7 +1156,7 @@ EXPORT_SYMBOL_GPL(spi_busnum_to_master);
int spi_setup(struct spi_device *spi)
{
unsigned bad_bits;
- int status;
+ int status = 0;
/* help drivers fail *cleanly* when they need options
* that aren't supported with their current master
@@ -1171,7 +1171,8 @@ int spi_setup(struct spi_device *spi)
if (!spi->bits_per_word)
spi->bits_per_word = 8;
- status = spi->master->setup(spi);
+ if (spi->master->setup)
+ status = spi->master->setup(spi);
dev_dbg(&spi->dev, "setup mode %d, %s%s%s%s"
"%u bits/w, %u Hz max --> %d\n",
diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index 830adbed1d7a..e44abc96cd05 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -31,6 +31,8 @@
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/compat.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/spi/spi.h>
#include <linux/spi/spidev.h>
@@ -642,10 +644,18 @@ static int __devexit spidev_remove(struct spi_device *spi)
return 0;
}
+static const struct of_device_id spidev_dt_ids[] = {
+ { .compatible = "rohm,dh2228fv" },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, spidev_dt_ids);
+
static struct spi_driver spidev_spi_driver = {
.driver = {
.name = "spidev",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(spidev_dt_ids),
},
.probe = spidev_probe,
.remove = __devexit_p(spidev_remove),
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-12 12:47:48 +0000