diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-hisi-sfc-v3xx.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/spi/spi-hisi-sfc-v3xx.c b/drivers/spi/spi-hisi-sfc-v3xx.c index 832b80e7ef67..385eb7bba05a 100644 --- a/drivers/spi/spi-hisi-sfc-v3xx.c +++ b/drivers/spi/spi-hisi-sfc-v3xx.c @@ -19,6 +19,8 @@ #define HISI_SFC_V3XX_VERSION (0x1f8) +#define HISI_SFC_V3XX_GLB_CFG (0x100) +#define HISI_SFC_V3XX_GLB_CFG_CS0_ADDR_MODE BIT(2) #define HISI_SFC_V3XX_RAW_INT_STAT (0x120) #define HISI_SFC_V3XX_INT_STAT (0x124) #define HISI_SFC_V3XX_INT_MASK (0x128) @@ -75,6 +77,7 @@ struct hisi_sfc_v3xx_host { void __iomem *regbase; int max_cmd_dword; struct completion *completion; + u8 address_mode; int irq; }; @@ -168,10 +171,18 @@ static int hisi_sfc_v3xx_adjust_op_size(struct spi_mem *mem, static bool hisi_sfc_v3xx_supports_op(struct spi_mem *mem, const struct spi_mem_op *op) { + struct spi_device *spi = mem->spi; + struct hisi_sfc_v3xx_host *host; + + host = spi_controller_get_devdata(spi->master); + if (op->data.buswidth > 4 || op->dummy.buswidth > 4 || op->addr.buswidth > 4 || op->cmd.buswidth > 4) return false; + if (op->addr.nbytes != host->address_mode && op->addr.nbytes) + return false; + return spi_mem_default_supports_op(mem, op); } @@ -416,7 +427,7 @@ static int hisi_sfc_v3xx_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct hisi_sfc_v3xx_host *host; struct spi_controller *ctlr; - u32 version; + u32 version, glb_config; int ret; ctlr = spi_alloc_master(&pdev->dev, sizeof(*host)); @@ -463,6 +474,18 @@ static int hisi_sfc_v3xx_probe(struct platform_device *pdev) ctlr->num_chipselect = 1; ctlr->mem_ops = &hisi_sfc_v3xx_mem_ops; + /* + * The address mode of the controller is either 3 or 4, + * which is indicated by the address mode bit in + * the global config register. The register is read only + * for the OS driver. + */ + glb_config = readl(host->regbase + HISI_SFC_V3XX_GLB_CFG); + if (glb_config & HISI_SFC_V3XX_GLB_CFG_CS0_ADDR_MODE) + host->address_mode = 4; + else + host->address_mode = 3; + version = readl(host->regbase + HISI_SFC_V3XX_VERSION); if (version >= 0x351) |