spi: cadence-qspi: Remove cdns,is-dma property handling

Remove cdns,is-dma DT property handling. Property is not the part of DT
binding and it is also hardcoded to value 1 in all DTs that's why remove it
because none is also testing value 0.
If there is any use case when this configuration should be supported this
patch can be reverted.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/6205c6585589b423692b6ed063506b4c51c04c77.1760006086.git.michal.simek@amd.com

diff --git a/arch/arm/dts/versal-mini-ospi.dtsi b/arch/arm/dts/versal-mini-ospi.dtsi
index eec2a08..6991f6a 100644 (file)
--- a/arch/arm/dts/versal-mini-ospi.dtsi
+++ b/arch/arm/dts/versal-mini-ospi.dtsi
@@ -38,7 +38,6 @@
                num-cs = <1>;
                cdns,fifo-depth = <256>;
                cdns,fifo-width = <4>;
-               cdns,is-dma = <1>;
                cdns,trigger-address = <0xc0000000>;
                #address-cells = <1>;
                #size-cells = <0>;

diff --git a/arch/arm/dts/versal-net-mini-ospi.dtsi b/arch/arm/dts/versal-net-mini-ospi.dtsi
index 1c94b35..d2d5ec8 100644 (file)
--- a/arch/arm/dts/versal-net-mini-ospi.dtsi
+++ b/arch/arm/dts/versal-net-mini-ospi.dtsi
@@ -52,7 +52,6 @@
                num-cs = <1>;
                cdns,fifo-depth = <256>;
                cdns,fifo-width = <4>;
-               cdns,is-dma = <1>;
                cdns,is-stig-pgm = <1>;
                cdns,trigger-address = <0xc0000000>;
                #address-cells = <1>;

diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c
index 599596f..849bd93 100644 (file)
--- a/drivers/spi/cadence_qspi.c
+++ b/drivers/spi/cadence_qspi.c
@@ -210,7 +210,6 @@ static int cadence_spi_probe(struct udevice *bus)
 
        priv->regbase           = plat->regbase;
        priv->ahbbase           = plat->ahbbase;
-       priv->is_dma            = plat->is_dma;
        priv->is_decoded_cs     = plat->is_decoded_cs;
        priv->fifo_depth        = plat->fifo_depth;
        priv->fifo_width        = plat->fifo_width;
@@ -348,10 +347,7 @@ static int cadence_spi_mem_exec_op(struct spi_slave *spi,
        case CQSPI_READ:
                err = cadence_qspi_apb_read_setup(priv, op);
                if (!err) {
-                       if (priv->is_dma)
-                               err = cadence_qspi_apb_dma_read(priv, op);
-                       else
-                               err = cadence_qspi_apb_read_execute(priv, op);
+                       err = cadence_qspi_apb_dma_read(priv, op);
                }
                break;
        case CQSPI_WRITE:
@@ -412,8 +408,6 @@ static int cadence_spi_of_to_plat(struct udevice *bus)
        if (plat->ahbsize >= SZ_8M)
                priv->use_dac_mode = true;
 
-       plat->is_dma = dev_read_bool(bus, "cdns,is-dma");
-
        /* All other parameters are embedded in the child node */
        subnode = cadence_qspi_get_subnode(bus);
        if (!ofnode_valid(subnode)) {

diff --git a/drivers/spi/cadence_qspi.h b/drivers/spi/cadence_qspi.h
index 879e7f8..10c4ad1 100644 (file)
--- a/drivers/spi/cadence_qspi.h
+++ b/drivers/spi/cadence_qspi.h
@@ -223,8 +223,6 @@ struct cadence_spi_plat {
        u32             tchsh_ns;
        u32             tslch_ns;
        u32             quirks;
-
-       bool            is_dma;
 };
 
 struct cadence_spi_priv {
@@ -261,7 +259,6 @@ struct cadence_spi_priv {
        bool            ddr_init;
        bool            is_decoded_cs;
        bool            use_dac_mode;
-       bool            is_dma;
 
        /* Transaction protocol parameters. */
        u8              inst_width;
@@ -292,8 +289,6 @@ int cadence_qspi_apb_command_write(struct cadence_spi_priv *priv,
 
 int cadence_qspi_apb_read_setup(struct cadence_spi_priv *priv,
                                const struct spi_mem_op *op);
-int cadence_qspi_apb_read_execute(struct cadence_spi_priv *priv,
-                                 const struct spi_mem_op *op);
 int cadence_qspi_apb_write_setup(struct cadence_spi_priv *priv,
                                 const struct spi_mem_op *op);
 int cadence_qspi_apb_write_execute(struct cadence_spi_priv *priv,

diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c
index 4696c09..58be017 100644 (file)
--- a/drivers/spi/cadence_qspi_apb.c
+++ b/drivers/spi/cadence_qspi_apb.c
@@ -667,125 +667,6 @@ int cadence_qspi_apb_read_setup(struct cadence_spi_priv *priv,
        return 0;
 }
 
-static u32 cadence_qspi_get_rd_sram_level(struct cadence_spi_priv *priv)
-{
-       u32 reg = readl(priv->regbase + CQSPI_REG_SDRAMLEVEL);
-       reg >>= CQSPI_REG_SDRAMLEVEL_RD_LSB;
-       return reg & CQSPI_REG_SDRAMLEVEL_RD_MASK;
-}
-
-static int cadence_qspi_wait_for_data(struct cadence_spi_priv *priv)
-{
-       unsigned int timeout = 10000;
-       u32 reg;
-
-       while (timeout--) {
-               reg = cadence_qspi_get_rd_sram_level(priv);
-               if (reg)
-                       return reg;
-               udelay(1);
-       }
-
-       return -ETIMEDOUT;
-}
-
-static int
-cadence_qspi_apb_indirect_read_execute(struct cadence_spi_priv *priv,
-                                      unsigned int n_rx, u8 *rxbuf)
-{
-       unsigned int remaining = n_rx;
-       unsigned int bytes_to_read = 0;
-       int ret;
-
-       writel(n_rx, priv->regbase + CQSPI_REG_INDIRECTRDBYTES);
-
-       /* Start the indirect read transfer */
-       writel(CQSPI_REG_INDIRECTRD_START,
-              priv->regbase + CQSPI_REG_INDIRECTRD);
-
-       while (remaining > 0) {
-               ret = cadence_qspi_wait_for_data(priv);
-               if (ret < 0) {
-                       printf("Indirect write timed out (%i)\n", ret);
-                       goto failrd;
-               }
-
-               bytes_to_read = ret;
-
-               while (bytes_to_read != 0) {
-                       bytes_to_read *= priv->fifo_width;
-                       bytes_to_read = bytes_to_read > remaining ?
-                                       remaining : bytes_to_read;
-                       /*
-                        * Handle non-4-byte aligned access to avoid
-                        * data abort.
-                        */
-                       if (((uintptr_t)rxbuf % 4) || (bytes_to_read % 4))
-                               readsb(priv->ahbbase, rxbuf, bytes_to_read);
-                       else
-                               readsl(priv->ahbbase, rxbuf,
-                                      bytes_to_read >> 2);
-                       rxbuf += bytes_to_read;
-                       remaining -= bytes_to_read;
-                       bytes_to_read = cadence_qspi_get_rd_sram_level(priv);
-               }
-       }
-
-       /* Check indirect done status */
-       ret = wait_for_bit_le32(priv->regbase + CQSPI_REG_INDIRECTRD,
-                               CQSPI_REG_INDIRECTRD_DONE, 1, 10, 0);
-       if (ret) {
-               printf("Indirect read completion error (%i)\n", ret);
-               goto failrd;
-       }
-
-       /* Clear indirect completion status */
-       writel(CQSPI_REG_INDIRECTRD_DONE,
-              priv->regbase + CQSPI_REG_INDIRECTRD);
-
-       /* Check indirect done status */
-       ret = wait_for_bit_le32(priv->regbase + CQSPI_REG_INDIRECTRD,
-                               CQSPI_REG_INDIRECTRD_DONE, 0, 10, 0);
-       if (ret) {
-               printf("Indirect read clear completion error (%i)\n", ret);
-               goto failrd;
-       }
-
-       /* Wait til QSPI is idle */
-       if (!cadence_qspi_wait_idle(priv->regbase))
-               return -EIO;
-
-       return 0;
-
-failrd:
-       /* Cancel the indirect read */
-       writel(CQSPI_REG_INDIRECTRD_CANCEL,
-              priv->regbase + CQSPI_REG_INDIRECTRD);
-       return ret;
-}
-
-int cadence_qspi_apb_read_execute(struct cadence_spi_priv *priv,
-                                 const struct spi_mem_op *op)
-{
-       u64 from = op->addr.val;
-       void *buf = op->data.buf.in;
-       size_t len = op->data.nbytes;
-
-       cadence_qspi_apb_enable_linear_mode(true);
-
-       if (priv->use_dac_mode && (from + len < priv->ahbsize)) {
-               if (len < 256 ||
-                   dma_memcpy(buf, priv->ahbbase + from, len) < 0) {
-                       memcpy_fromio(buf, priv->ahbbase + from, len);
-               }
-               if (!cadence_qspi_wait_idle(priv->regbase))
-                       return -EIO;
-               return 0;
-       }
-
-       return cadence_qspi_apb_indirect_read_execute(priv, len, buf);
-}
-
 /* Opcode + Address (3/4 bytes) */
 int cadence_qspi_apb_write_setup(struct cadence_spi_priv *priv,
                                 const struct spi_mem_op *op)