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path: root/drivers/spi/spi-s3c64xx.c
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Diffstat (limited to 'drivers/spi/spi-s3c64xx.c')
-rw-r--r--drivers/spi/spi-s3c64xx.c80
1 files changed, 32 insertions, 48 deletions
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index ad93231a8038..8f492ed317cc 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -62,7 +62,7 @@
#define S3C64XX_SPI_CLKSEL_SRCMSK (3<<9)
#define S3C64XX_SPI_CLKSEL_SRCSHFT 9
#define S3C64XX_SPI_ENCLK_ENABLE (1<<8)
-#define S3C64XX_SPI_PSR_MASK 0xff
+#define S3C64XX_SPI_PSR_MASK 0xff
#define S3C64XX_SPI_MODE_CH_TSZ_BYTE (0<<29)
#define S3C64XX_SPI_MODE_CH_TSZ_HALFWORD (1<<29)
@@ -697,7 +697,7 @@ static int s3c64xx_spi_transfer_one_message(struct spi_master *master,
INIT_COMPLETION(sdd->xfer_completion);
/* Only BPW and Speed may change across transfers */
- bpw = xfer->bits_per_word ? : spi->bits_per_word;
+ bpw = xfer->bits_per_word;
speed = xfer->speed_hz ? : spi->max_speed_hz;
if (xfer->len % (bpw / 8)) {
@@ -743,8 +743,7 @@ static int s3c64xx_spi_transfer_one_message(struct spi_master *master,
sdd->regs + S3C64XX_SPI_SLAVE_SEL);
if (status) {
- dev_err(&spi->dev, "I/O Error: "
- "rx-%d tx-%d res:rx-%c tx-%c len-%d\n",
+ dev_err(&spi->dev, "I/O Error: rx-%d tx-%d res:rx-%c tx-%c len-%d\n",
xfer->rx_buf ? 1 : 0, xfer->tx_buf ? 1 : 0,
(sdd->state & RXBUSY) ? 'f' : 'p',
(sdd->state & TXBUSY) ? 'f' : 'p',
@@ -799,7 +798,7 @@ static int s3c64xx_spi_prepare_transfer(struct spi_master *spi)
/* Acquire DMA channels */
while (!acquire_dma(sdd))
- msleep(10);
+ usleep_range(10000, 11000);
pm_runtime_get_sync(&sdd->pdev->dev);
@@ -841,16 +840,14 @@ static struct s3c64xx_spi_csinfo *s3c64xx_get_slave_ctrldata(
cs = kzalloc(sizeof(*cs), GFP_KERNEL);
if (!cs) {
- dev_err(&spi->dev, "could not allocate memory for controller"
- " data\n");
+ dev_err(&spi->dev, "could not allocate memory for controller data\n");
of_node_put(data_np);
return ERR_PTR(-ENOMEM);
}
cs->line = of_get_named_gpio(data_np, "cs-gpio", 0);
if (!gpio_is_valid(cs->line)) {
- dev_err(&spi->dev, "chip select gpio is not specified or "
- "invalid\n");
+ dev_err(&spi->dev, "chip select gpio is not specified or invalid\n");
kfree(cs);
of_node_put(data_np);
return ERR_PTR(-EINVAL);
@@ -957,6 +954,8 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
if (spi->max_speed_hz >= speed) {
spi->max_speed_hz = speed;
} else {
+ dev_err(&spi->dev, "Can't set %dHz transfer speed\n",
+ spi->max_speed_hz);
err = -EINVAL;
goto setup_exit;
}
@@ -1076,8 +1075,8 @@ static int s3c64xx_spi_get_dmares(
if (!sdd->pdev->dev.of_node) {
res = platform_get_resource(pdev, IORESOURCE_DMA, tx ? 0 : 1);
if (!res) {
- dev_err(&pdev->dev, "Unable to get SPI-%s dma "
- "resource\n", chan_str);
+ dev_err(&pdev->dev, "Unable to get SPI-%s dma resource\n",
+ chan_str);
return -ENXIO;
}
dma_data->dmach = res->start;
@@ -1133,8 +1132,7 @@ static void s3c64xx_spi_dt_gpio_free(struct s3c64xx_spi_driver_data *sdd)
gpio_free(sdd->gpios[idx]);
}
-static struct s3c64xx_spi_info * s3c64xx_spi_parse_dt(
- struct device *dev)
+static struct s3c64xx_spi_info *s3c64xx_spi_parse_dt(struct device *dev)
{
struct s3c64xx_spi_info *sci;
u32 temp;
@@ -1146,16 +1144,14 @@ static struct s3c64xx_spi_info * s3c64xx_spi_parse_dt(
}
if (of_property_read_u32(dev->of_node, "samsung,spi-src-clk", &temp)) {
- dev_warn(dev, "spi bus clock parent not specified, using "
- "clock at index 0 as parent\n");
+ dev_warn(dev, "spi bus clock parent not specified, using clock at index 0 as parent\n");
sci->src_clk_nr = 0;
} else {
sci->src_clk_nr = temp;
}
if (of_property_read_u32(dev->of_node, "num-cs", &temp)) {
- dev_warn(dev, "number of chip select lines not specified, "
- "assuming 1 chip select line\n");
+ dev_warn(dev, "number of chip select lines not specified, assuming 1 chip select line\n");
sci->num_cs = 1;
} else {
sci->num_cs = temp;
@@ -1195,7 +1191,7 @@ static inline struct s3c64xx_spi_port_config *s3c64xx_spi_get_port_config(
platform_get_device_id(pdev)->driver_data;
}
-static int __init s3c64xx_spi_probe(struct platform_device *pdev)
+static int s3c64xx_spi_probe(struct platform_device *pdev)
{
struct resource *mem_res;
struct s3c64xx_spi_driver_data *sdd;
@@ -1245,8 +1241,8 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
if (pdev->dev.of_node) {
ret = of_alias_get_id(pdev->dev.of_node, "spi");
if (ret < 0) {
- dev_err(&pdev->dev, "failed to get alias id, "
- "errno %d\n", ret);
+ dev_err(&pdev->dev, "failed to get alias id, errno %d\n",
+ ret);
goto err0;
}
sdd->port_id = ret;
@@ -1280,7 +1276,7 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
if (sdd->regs == NULL) {
dev_err(&pdev->dev, "Unable to remap IO\n");
ret = -ENXIO;
- goto err1;
+ goto err0;
}
if (!sci->cfg_gpio && pdev->dev.of_node) {
@@ -1289,36 +1285,36 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
} else if (sci->cfg_gpio == NULL || sci->cfg_gpio()) {
dev_err(&pdev->dev, "Unable to config gpio\n");
ret = -EBUSY;
- goto err2;
+ goto err0;
}
/* Setup clocks */
- sdd->clk = clk_get(&pdev->dev, "spi");
+ sdd->clk = devm_clk_get(&pdev->dev, "spi");
if (IS_ERR(sdd->clk)) {
dev_err(&pdev->dev, "Unable to acquire clock 'spi'\n");
ret = PTR_ERR(sdd->clk);
- goto err3;
+ goto err1;
}
if (clk_prepare_enable(sdd->clk)) {
dev_err(&pdev->dev, "Couldn't enable clock 'spi'\n");
ret = -EBUSY;
- goto err4;
+ goto err1;
}
sprintf(clk_name, "spi_busclk%d", sci->src_clk_nr);
- sdd->src_clk = clk_get(&pdev->dev, clk_name);
+ sdd->src_clk = devm_clk_get(&pdev->dev, clk_name);
if (IS_ERR(sdd->src_clk)) {
dev_err(&pdev->dev,
"Unable to acquire clock '%s'\n", clk_name);
ret = PTR_ERR(sdd->src_clk);
- goto err5;
+ goto err2;
}
if (clk_prepare_enable(sdd->src_clk)) {
dev_err(&pdev->dev, "Couldn't enable clock '%s'\n", clk_name);
ret = -EBUSY;
- goto err6;
+ goto err2;
}
/* Setup Deufult Mode */
@@ -1328,11 +1324,12 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
init_completion(&sdd->xfer_completion);
INIT_LIST_HEAD(&sdd->queue);
- ret = request_irq(irq, s3c64xx_spi_irq, 0, "spi-s3c64xx", sdd);
+ ret = devm_request_irq(&pdev->dev, irq, s3c64xx_spi_irq, 0,
+ "spi-s3c64xx", sdd);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to request IRQ %d: %d\n",
irq, ret);
- goto err7;
+ goto err3;
}
writel(S3C64XX_SPI_INT_RX_OVERRUN_EN | S3C64XX_SPI_INT_RX_UNDERRUN_EN |
@@ -1342,11 +1339,10 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
if (spi_register_master(master)) {
dev_err(&pdev->dev, "cannot register SPI master\n");
ret = -EBUSY;
- goto err8;
+ goto err3;
}
- dev_dbg(&pdev->dev, "Samsung SoC SPI Driver loaded for Bus SPI-%d "
- "with %d Slaves attached\n",
+ dev_dbg(&pdev->dev, "Samsung SoC SPI Driver loaded for Bus SPI-%d with %d Slaves attached\n",
sdd->port_id, master->num_chipselect);
dev_dbg(&pdev->dev, "\tIOmem=[0x%x-0x%x]\tDMA=[Rx-%d, Tx-%d]\n",
mem_res->end, mem_res->start,
@@ -1356,21 +1352,13 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
return 0;
-err8:
- free_irq(irq, sdd);
-err7:
+err3:
clk_disable_unprepare(sdd->src_clk);
-err6:
- clk_put(sdd->src_clk);
-err5:
+err2:
clk_disable_unprepare(sdd->clk);
-err4:
- clk_put(sdd->clk);
-err3:
+err1:
if (!sdd->cntrlr_info->cfg_gpio && pdev->dev.of_node)
s3c64xx_spi_dt_gpio_free(sdd);
-err2:
-err1:
err0:
platform_set_drvdata(pdev, NULL);
spi_master_put(master);
@@ -1389,13 +1377,9 @@ static int s3c64xx_spi_remove(struct platform_device *pdev)
writel(0, sdd->regs + S3C64XX_SPI_INT_EN);
- free_irq(platform_get_irq(pdev, 0), sdd);
-
clk_disable_unprepare(sdd->src_clk);
- clk_put(sdd->src_clk);
clk_disable_unprepare(sdd->clk);
- clk_put(sdd->clk);
if (!sdd->cntrlr_info->cfg_gpio && pdev->dev.of_node)
s3c64xx_spi_dt_gpio_free(sdd);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.