[RESEND PATCH v3 1/8] mtd: spi-nor: cadence-quadspi: Make driver independent of flash geometry

Vignesh Raghavendra
2020-06-01T07:05:39Z

Drop configuration of Flash size, erase size and page size
configuration. Flash size is needed only if using AHB decoder (BIT 23 of
CONFIG_REG) which is not used by the driver.
Erase size and page size are needed if IP is configured to send WREN
automatically. But since SPI NOR layer takes care of sending WREN, there
is no need to configure these fields either.

Therefore drop these in preparation to move the driver to spi-mem
framework where flash geometry is not visible to controller driver.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
---
.../mtd/spi-nor/controllers/cadence-quadspi.c | 36 +------------------
1 file changed, 1 insertion(+), 35 deletions(-)

diff --git a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
index 494dcab4aaaab..9b8554d44fac8 100644
--- a/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
+++ b/drivers/mtd/spi-nor/controllers/cadence-quadspi.c
@@ -77,9 +77,6 @@ struct cqspi_st {
dma_addr_t mmap_phys_base;

int current_cs;
- int current_page_size;
- int current_erase_size;
- int current_addr_width;
unsigned long master_ref_clk_hz;
bool is_decoded_cs;
u32 fifo_depth;
@@ -736,32 +733,6 @@ static void cqspi_chipselect(struct spi_nor *nor)
writel(reg, reg_base + CQSPI_REG_CONFIG);
}

-static void cqspi_configure_cs_and_sizes(struct spi_nor *nor)
-{
- struct cqspi_flash_pdata *f_pdata = nor->priv;
- struct cqspi_st *cqspi = f_pdata->cqspi;
- void __iomem *iobase = cqspi->iobase;
- unsigned int reg;
-
- /* configure page size and block size. */
- reg = readl(iobase + CQSPI_REG_SIZE);
- reg &= ~(CQSPI_REG_SIZE_PAGE_MASK << CQSPI_REG_SIZE_PAGE_LSB);
- reg &= ~(CQSPI_REG_SIZE_BLOCK_MASK << CQSPI_REG_SIZE_BLOCK_LSB);
- reg &= ~CQSPI_REG_SIZE_ADDRESS_MASK;
- reg |= (nor->page_size << CQSPI_REG_SIZE_PAGE_LSB);
- reg |= (ilog2(nor->mtd.erasesize) << CQSPI_REG_SIZE_BLOCK_LSB);
- reg |= (nor->addr_width - 1);
- writel(reg, iobase + CQSPI_REG_SIZE);
-
- /* configure the chip select */
- cqspi_chipselect(nor);
-
- /* Store the new configuration of the controller */
- cqspi->current_page_size = nor->page_size;
- cqspi->current_erase_size = nor->mtd.erasesize;
- cqspi->current_addr_width = nor->addr_width;
-}
-
static unsigned int calculate_ticks_for_ns(const unsigned int ref_clk_hz,
const unsigned int ns_val)
{
@@ -867,18 +838,13 @@ static void cqspi_configure(struct spi_nor *nor)
int switch_cs = (cqspi->current_cs != f_pdata->cs);
int switch_ck = (cqspi->sclk != sclk);

- if ((cqspi->current_page_size != nor->page_size) ||
- (cqspi->current_erase_size != nor->mtd.erasesize) ||
- (cqspi->current_addr_width != nor->addr_width))
- switch_cs = 1;
-
if (switch_cs || switch_ck)
cqspi_controller_enable(cqspi, 0);

/* Switch chip select. */
if (switch_cs) {
cqspi->current_cs = f_pdata->cs;
- cqspi_configure_cs_and_sizes(nor);
+ cqspi_chipselect(nor);
}

/* Setup baudrate divisor and delays */
--
2.26.2