diff options
Diffstat (limited to 'drivers/spi/spi-sun6i.c')
| -rw-r--r-- | drivers/spi/spi-sun6i.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/spi/spi-sun6i.c b/drivers/spi/spi-sun6i.c index 9918a57a6a6e..e3114832c485 100644 --- a/drivers/spi/spi-sun6i.c +++ b/drivers/spi/spi-sun6i.c @@ -17,6 +17,7 @@ #include <linux/interrupt.h> #include <linux/io.h> #include <linux/module.h> +#include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/reset.h> @@ -24,6 +25,7 @@ #include <linux/spi/spi.h> #define SUN6I_FIFO_DEPTH 128 +#define SUN8I_FIFO_DEPTH 64 #define SUN6I_GBL_CTL_REG 0x04 #define SUN6I_GBL_CTL_BUS_ENABLE BIT(0) @@ -90,6 +92,7 @@ struct sun6i_spi { const u8 *tx_buf; u8 *rx_buf; int len; + unsigned long fifo_depth; }; static inline u32 sun6i_spi_read(struct sun6i_spi *sspi, u32 reg) @@ -155,7 +158,9 @@ static void sun6i_spi_set_cs(struct spi_device *spi, bool enable) static size_t sun6i_spi_max_transfer_size(struct spi_device *spi) { - return SUN6I_FIFO_DEPTH - 1; + struct sun6i_spi *sspi = spi_master_get_devdata(spi->master); + + return sspi->fifo_depth - 1; } static int sun6i_spi_transfer_one(struct spi_master *master, @@ -170,7 +175,7 @@ static int sun6i_spi_transfer_one(struct spi_master *master, u32 reg; /* We don't support transfer larger than the FIFO */ - if (tfr->len > SUN6I_FIFO_DEPTH) + if (tfr->len > sspi->fifo_depth) return -EINVAL; reinit_completion(&sspi->done); @@ -265,7 +270,7 @@ static int sun6i_spi_transfer_one(struct spi_master *master, SUN6I_BURST_CTL_CNT_STC(tx_len)); /* Fill the TX FIFO */ - sun6i_spi_fill_fifo(sspi, SUN6I_FIFO_DEPTH); + sun6i_spi_fill_fifo(sspi, sspi->fifo_depth); /* Enable the interrupts */ sun6i_spi_write(sspi, SUN6I_INT_CTL_REG, SUN6I_INT_CTL_TC); @@ -288,7 +293,7 @@ static int sun6i_spi_transfer_one(struct spi_master *master, goto out; } - sun6i_spi_drain_fifo(sspi, SUN6I_FIFO_DEPTH); + sun6i_spi_drain_fifo(sspi, sspi->fifo_depth); out: sun6i_spi_write(sspi, SUN6I_INT_CTL_REG, 0); @@ -398,6 +403,8 @@ static int sun6i_spi_probe(struct platform_device *pdev) } sspi->master = master; + sspi->fifo_depth = (unsigned long)of_device_get_match_data(&pdev->dev); + master->max_speed_hz = 100 * 1000 * 1000; master->min_speed_hz = 3 * 1000; master->set_cs = sun6i_spi_set_cs; @@ -470,7 +477,8 @@ static int sun6i_spi_remove(struct platform_device *pdev) } static const struct of_device_id sun6i_spi_match[] = { - { .compatible = "allwinner,sun6i-a31-spi", }, + { .compatible = "allwinner,sun6i-a31-spi", .data = (void *)SUN6I_FIFO_DEPTH }, + { .compatible = "allwinner,sun8i-h3-spi", .data = (void *)SUN8I_FIFO_DEPTH }, {} }; MODULE_DEVICE_TABLE(of, sun6i_spi_match); |