[U-Boot] [PATCH v5 0/5] spi: cadence_qspi: optimize & fix indirect rd-writes

[U-Boot] [PATCH v5 0/5] spi: cadence_qspi: optimize & fix indirect rd-writes

[Vikas Manocha]

This patchset:
- fixes trigger base & transfer start address register programming. This fix
superseeds the previous patch "spi: cadence_qspi: Fix the indirect ahb trigger
address setting".
- adds support to get fifo width from device tree

Changes in v5:
- fixed compilation warnings.

Changes in v4:
- fifo-width & trigger address alligned to linux device tree binding.
- removed un-necessary casting.
- renaming of one parameter splitted to separate patch.
- trigger address of socfpga reverted back to 0x0.
- code formatting done to avoid checkpatch CHECKS.

Changes in v3:
- removed two patches which were bypassing the sram level check.
- format string in patch corrected 3/4
- added commit message in patch 1/4

Changes in v2:
- rebased to master.
- removed patch "spi: cadence_qspi: read can be independent of fifo width", it
  was implemented in other patchset, in mainline now.

Vikas Manocha (5):
  spi: cadence_qspi: move trigger base configuration in init
  spi: cadence_qspi: fix indirect read/write start address
  spi: cadence_qspi: fix base trigger address & transfer start address
  spi: cadence_qspi: rename ahbbase to flashbase for clarity
  spi: cadence_qspi: get fifo width from device tree

 arch/arm/dts/socfpga.dtsi      |    2 ++
 arch/arm/dts/stv0991.dts       |    2 ++
 drivers/spi/cadence_qspi.c     |   14 ++++++++------
 drivers/spi/cadence_qspi.h     |    6 ++++--
 drivers/spi/cadence_qspi_apb.c |   42 ++++++++++++++++------------------------
 5 files changed, 33 insertions(+), 33 deletions(-)

-- 
1.7.9.5

[U-Boot] [PATCH v5 1/5] spi: cadence_qspi: move trigger base configuration in init

[Vikas Manocha]

No need to configure indirect trigger address for every read/write.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
---

Changes in v5: fixed type cast compilation warnings.
Changes in v4: removed extra type casts.
Changes in v3: added commit message & removed extra bracket.
Changes in v2: Rebased to master

 drivers/spi/cadence_qspi_apb.c |    9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c
index d053407..d377ad1 100644
--- a/drivers/spi/cadence_qspi_apb.c
+++ b/drivers/spi/cadence_qspi_apb.c
@@ -534,6 +534,8 @@ void cadence_qspi_apb_controller_init(struct cadence_spi_platdata *plat)
 
 	/* Indirect mode configurations */
 	writel((plat->sram_size/2), plat->regbase + CQSPI_REG_SRAMPARTITION);
+	writel((u32)plat->ahbbase & CQSPI_INDIRECTTRIGGER_ADDR_MASK,
+	       plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
 
 	/* Disable all interrupts */
 	writel(0, plat->regbase + CQSPI_REG_IRQMASK);
@@ -693,10 +695,6 @@ int cadence_qspi_apb_indirect_read_setup(struct cadence_spi_platdata *plat,
 		/* for normal read (only ramtron as of now) */
 		addr_bytes = cmdlen - 1;
 
-	/* Setup the indirect trigger address */
-	writel(((u32)plat->ahbbase & CQSPI_INDIRECTTRIGGER_ADDR_MASK),
-	       plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
-
 	/* Configure the opcode */
 	rd_reg = cmdbuf[0] << CQSPI_REG_RD_INSTR_OPCODE_LSB;
 
@@ -790,9 +788,6 @@ int cadence_qspi_apb_indirect_write_setup(struct cadence_spi_platdata *plat,
 		       cmdlen, (unsigned int)cmdbuf);
 		return -EINVAL;
 	}
-	/* Setup the indirect trigger address */
-	writel(((u32)plat->ahbbase & CQSPI_INDIRECTTRIGGER_ADDR_MASK),
-	       plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
 
 	/* Configure the opcode */
 	reg = cmdbuf[0] << CQSPI_REG_WR_INSTR_OPCODE_LSB;
-- 
1.7.9.5

[U-Boot] [PATCH v5 2/5] spi: cadence_qspi: fix indirect read/write start address

[Vikas Manocha]

Indirect read/write start addresses are flash start addresses for indirect read
or write transfers. These should be absolute flash addresses instead of
offsets.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
---

Changes in v5: fixed type cast compilation warnings.
Changes in v4: removed extra type casts.
Changes in v3: none
Changes in v2: Rebased to master

 drivers/spi/cadence_qspi_apb.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c
index d377ad1..c5b14c5 100644
--- a/drivers/spi/cadence_qspi_apb.c
+++ b/drivers/spi/cadence_qspi_apb.c
@@ -705,7 +705,8 @@ int cadence_qspi_apb_indirect_read_setup(struct cadence_spi_platdata *plat,
 
 	/* Get address */
 	addr_value = cadence_qspi_apb_cmd2addr(&cmdbuf[1], addr_bytes);
-	writel(addr_value, plat->regbase + CQSPI_REG_INDIRECTRDSTARTADDR);
+	writel((u32)plat->ahbbase + addr_value,
+	       plat->regbase + CQSPI_REG_INDIRECTRDSTARTADDR);
 
 	/* The remaining lenght is dummy bytes. */
 	dummy_bytes = cmdlen - addr_bytes - 1;
@@ -795,7 +796,8 @@ int cadence_qspi_apb_indirect_write_setup(struct cadence_spi_platdata *plat,
 
 	/* Setup write address. */
 	reg = cadence_qspi_apb_cmd2addr(&cmdbuf[1], addr_bytes);
-	writel(reg, plat->regbase + CQSPI_REG_INDIRECTWRSTARTADDR);
+	writel((u32)plat->ahbbase + reg,
+	       plat->regbase + CQSPI_REG_INDIRECTWRSTARTADDR);
 
 	reg = readl(plat->regbase + CQSPI_REG_SIZE);
 	reg &= ~CQSPI_REG_SIZE_ADDRESS_MASK;
-- 
1.7.9.5

[U-Boot] [PATCH v5 3/5] spi: cadence_qspi: fix base trigger address & transfer start address

[Vikas Manocha]

This patch is to separate the base trigger from the read/write transfer start
addresses.

Base trigger register address (0x1c register) corresponds to the address which
should be put on AHB bus to handle indirect transfer triggered before.

To handle indirect transfer we need to issue addresses from (value of 0x1c) to
(value of 0x1c) + 15*4 ("4" corresponds to size of SRAM location).
There are no obstacles in issuing const address just equal to 0x1c. Important
thing to note is that indirect trigger address has nothing in common with your
physical or mapped NOR Flash address.

Transfer read/write start addresses (offset 0x68/0x78)should be programmed with
the absolute flash address to be read/written.

plat->triggerbase is added in device tree for mapped spi flash address.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
---

Changes in v5: None.
Changes in v4:
- fifo-width & trigger address alligned to linux device tree binding.
- renaming of one parameter moved to separate patch.
- trigger address of socfpga reverted back to 0x0.

Changes in v3: formatted string breaking fixed.
Changes in v2: Rebased to master

 arch/arm/dts/socfpga.dtsi      |    1 +
 arch/arm/dts/stv0991.dts       |    1 +
 drivers/spi/cadence_qspi.c     |    9 +++++----
 drivers/spi/cadence_qspi.h     |    1 +
 drivers/spi/cadence_qspi_apb.c |    7 +++----
 5 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
index 9b12420..fe6ad80 100644
--- a/arch/arm/dts/socfpga.dtsi
+++ b/arch/arm/dts/socfpga.dtsi
@@ -639,6 +639,7 @@
 			ext-decoder = <0>;  /* external decoder */
 			num-cs = <4>;
 			fifo-depth = <128>;
+			cdns,trigger-address = <0x0 0x0010>;
 			sram-size = <128>;
 			bus-num = <2>;
 			status = "disabled";
diff --git a/arch/arm/dts/stv0991.dts b/arch/arm/dts/stv0991.dts
index fa3fd64..192d9e5 100644
--- a/arch/arm/dts/stv0991.dts
+++ b/arch/arm/dts/stv0991.dts
@@ -33,6 +33,7 @@
 				<0x40000000 0x1000000>;
 			clocks = <3750000>;
 			sram-size = <256>;
+			cdns,trigger-address = <0x40000000 0x0000010>;
 			status = "okay";
 
 			flash0: n25q32 at 0 {
diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c
index 34a0f46..0d1abc8 100644
--- a/drivers/spi/cadence_qspi.c
+++ b/drivers/spi/cadence_qspi.c
@@ -290,6 +290,8 @@ static int cadence_spi_ofdata_to_platdata(struct udevice *bus)
 
 	plat->regbase = (void *)data[0];
 	plat->ahbbase = (void *)data[2];
+	plat->trigger_base = (u32 *)fdtdec_get_addr(blob, node,
+						    "cdns,trigger-address");
 
 	/* Use 500KHz as a suitable default */
 	plat->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency",
@@ -311,10 +313,9 @@ static int cadence_spi_ofdata_to_platdata(struct udevice *bus)
 	plat->tslch_ns = fdtdec_get_int(blob, subnode, "tslch-ns", 20);
 	plat->sram_size = fdtdec_get_int(blob, node, "sram-size", 128);
 
-	debug("%s: regbase=%p ahbbase=%p max-frequency=%d page-size=%d\n",
-	      __func__, plat->regbase, plat->ahbbase, plat->max_hz,
-	      plat->page_size);
-
+	debug("%s: regbase=%p ahbbase=%p trigger_base=%p max-frequency=%d page-size=%d\n",
+	      __func__, plat->regbase, plat->ahbbase, plat->trigger_base,
+	      plat->max_hz, plat->page_size);
 	return 0;
 }
 
diff --git a/drivers/spi/cadence_qspi.h b/drivers/spi/cadence_qspi.h
index 98e57aa..2f1bd92 100644
--- a/drivers/spi/cadence_qspi.h
+++ b/drivers/spi/cadence_qspi.h
@@ -18,6 +18,7 @@ struct cadence_spi_platdata {
 	unsigned int	max_hz;
 	void		*regbase;
 	void		*ahbbase;
+	void		*trigger_base;
 
 	u32		page_size;
 	u32		block_size;
diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c
index c5b14c5..8156b2b 100644
--- a/drivers/spi/cadence_qspi_apb.c
+++ b/drivers/spi/cadence_qspi_apb.c
@@ -44,7 +44,6 @@
 #define CQSPI_INST_TYPE_QUAD			(2)
 
 #define CQSPI_STIG_DATA_LEN_MAX			(8)
-#define CQSPI_INDIRECTTRIGGER_ADDR_MASK		(0xFFFFF)
 
 #define CQSPI_DUMMY_CLKS_PER_BYTE		(8)
 #define CQSPI_DUMMY_BYTES_MAX			(4)
@@ -281,7 +280,7 @@ static int qpsi_write_sram_fifo_push(struct cadence_spi_platdata *plat,
 				const void *src_addr, unsigned int num_bytes)
 {
 	const void *reg_base = plat->regbase;
-	void *dest_addr = plat->ahbbase;
+	void *dest_addr = plat->trigger_base;
 	unsigned int retry = CQSPI_REG_RETRY;
 	unsigned int sram_level;
 	unsigned int wr_bytes;
@@ -534,7 +533,7 @@ void cadence_qspi_apb_controller_init(struct cadence_spi_platdata *plat)
 
 	/* Indirect mode configurations */
 	writel((plat->sram_size/2), plat->regbase + CQSPI_REG_SRAMPARTITION);
-	writel((u32)plat->ahbbase & CQSPI_INDIRECTTRIGGER_ADDR_MASK,
+	writel((u32)plat->trigger_base,
 	       plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
 
 	/* Disable all interrupts */
@@ -753,7 +752,7 @@ int cadence_qspi_apb_indirect_read_execute(struct cadence_spi_platdata *plat,
 	       plat->regbase + CQSPI_REG_INDIRECTRD);
 
 	if (qspi_read_sram_fifo_poll(plat->regbase, (void *)rxbuf,
-				     (const void *)plat->ahbbase, rxlen))
+				     (const void *)plat->trigger_base, rxlen))
 		goto failrd;
 
 	/* Check flash indirect controller */
-- 
1.7.9.5

[U-Boot] [PATCH v5 4/5] spi: cadence_qspi: rename ahbbase to flashbase for clarity

[Vikas Manocha]

plat->ahbbase renamed to plat->flashbase for better clarity.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
---

Changes in v5: none
Changes in v4: new

 drivers/spi/cadence_qspi.c     |    8 ++++----
 drivers/spi/cadence_qspi.h     |    4 ++--
 drivers/spi/cadence_qspi_apb.c |    4 ++--
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c
index 0d1abc8..c63f583 100644
--- a/drivers/spi/cadence_qspi.c
+++ b/drivers/spi/cadence_qspi.c
@@ -150,7 +150,7 @@ static int cadence_spi_probe(struct udevice *bus)
 	struct cadence_spi_priv *priv = dev_get_priv(bus);
 
 	priv->regbase = plat->regbase;
-	priv->ahbbase = plat->ahbbase;
+	priv->flashbase = plat->flashbase;
 
 	if (!priv->qspi_is_init) {
 		cadence_qspi_apb_controller_init(plat);
@@ -289,7 +289,7 @@ static int cadence_spi_ofdata_to_platdata(struct udevice *bus)
 	}
 
 	plat->regbase = (void *)data[0];
-	plat->ahbbase = (void *)data[2];
+	plat->flashbase = (void *)data[2];
 	plat->trigger_base = (u32 *)fdtdec_get_addr(blob, node,
 						    "cdns,trigger-address");
 
@@ -313,8 +313,8 @@ static int cadence_spi_ofdata_to_platdata(struct udevice *bus)
 	plat->tslch_ns = fdtdec_get_int(blob, subnode, "tslch-ns", 20);
 	plat->sram_size = fdtdec_get_int(blob, node, "sram-size", 128);
 
-	debug("%s: regbase=%p ahbbase=%p trigger_base=%p max-frequency=%d page-size=%d\n",
-	      __func__, plat->regbase, plat->ahbbase, plat->trigger_base,
+	debug("%s: regbase=%p flashbase=%p trigger_base=%p max-frequency=%d page-size=%d\n",
+	      __func__, plat->regbase, plat->flashbase, plat->trigger_base,
 	      plat->max_hz, plat->page_size);
 	return 0;
 }
diff --git a/drivers/spi/cadence_qspi.h b/drivers/spi/cadence_qspi.h
index 2f1bd92..7341339 100644
--- a/drivers/spi/cadence_qspi.h
+++ b/drivers/spi/cadence_qspi.h
@@ -17,7 +17,7 @@
 struct cadence_spi_platdata {
 	unsigned int	max_hz;
 	void		*regbase;
-	void		*ahbbase;
+	void		*flashbase;
 	void		*trigger_base;
 
 	u32		page_size;
@@ -31,7 +31,7 @@ struct cadence_spi_platdata {
 
 struct cadence_spi_priv {
 	void		*regbase;
-	void		*ahbbase;
+	void		*flashbase;
 	size_t		cmd_len;
 	u8		cmd_buf[32];
 	size_t		data_len;
diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c
index 8156b2b..2638f00 100644
--- a/drivers/spi/cadence_qspi_apb.c
+++ b/drivers/spi/cadence_qspi_apb.c
@@ -704,7 +704,7 @@ int cadence_qspi_apb_indirect_read_setup(struct cadence_spi_platdata *plat,
 
 	/* Get address */
 	addr_value = cadence_qspi_apb_cmd2addr(&cmdbuf[1], addr_bytes);
-	writel((u32)plat->ahbbase + addr_value,
+	writel((u32)plat->flashbase + addr_value,
 	       plat->regbase + CQSPI_REG_INDIRECTRDSTARTADDR);
 
 	/* The remaining lenght is dummy bytes. */
@@ -795,7 +795,7 @@ int cadence_qspi_apb_indirect_write_setup(struct cadence_spi_platdata *plat,
 
 	/* Setup write address. */
 	reg = cadence_qspi_apb_cmd2addr(&cmdbuf[1], addr_bytes);
-	writel((u32)plat->ahbbase + reg,
+	writel((u32)plat->flashbase + reg,
 	       plat->regbase + CQSPI_REG_INDIRECTWRSTARTADDR);
 
 	reg = readl(plat->regbase + CQSPI_REG_SIZE);
-- 
1.7.9.5

[U-Boot] [PATCH v5 5/5] spi: cadence_qspi: get fifo width from device tree

[Vikas Manocha]

Fifo width could be different on different socs, e.g. stv0991 & altera soc
have different fifo width.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
---

Changes in v5: none
Changes in v4: alligned to linux device tree binding.
Changes in v3: none
Changes in v2: Rebased to master

 arch/arm/dts/socfpga.dtsi      |    1 +
 arch/arm/dts/stv0991.dts       |    1 +
 drivers/spi/cadence_qspi.c     |    1 +
 drivers/spi/cadence_qspi.h     |    1 +
 drivers/spi/cadence_qspi_apb.c |   24 ++++++++++--------------
 5 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
index fe6ad80..e976f5a 100644
--- a/arch/arm/dts/socfpga.dtsi
+++ b/arch/arm/dts/socfpga.dtsi
@@ -640,6 +640,7 @@
 			num-cs = <4>;
 			fifo-depth = <128>;
 			cdns,trigger-address = <0x0 0x0010>;
+			cdns,fifo-width = <4>;
 			sram-size = <128>;
 			bus-num = <2>;
 			status = "disabled";
diff --git a/arch/arm/dts/stv0991.dts b/arch/arm/dts/stv0991.dts
index 192d9e5..c31f681 100644
--- a/arch/arm/dts/stv0991.dts
+++ b/arch/arm/dts/stv0991.dts
@@ -34,6 +34,7 @@
 			clocks = <3750000>;
 			sram-size = <256>;
 			cdns,trigger-address = <0x40000000 0x0000010>;
+			cdns,fifo-width = <8>;
 			status = "okay";
 
 			flash0: n25q32 at 0 {
diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c
index c63f583..0430218 100644
--- a/drivers/spi/cadence_qspi.c
+++ b/drivers/spi/cadence_qspi.c
@@ -312,6 +312,7 @@ static int cadence_spi_ofdata_to_platdata(struct udevice *bus)
 	plat->tchsh_ns = fdtdec_get_int(blob, subnode, "tchsh-ns", 20);
 	plat->tslch_ns = fdtdec_get_int(blob, subnode, "tslch-ns", 20);
 	plat->sram_size = fdtdec_get_int(blob, node, "sram-size", 128);
+	plat->fifo_width = fdtdec_get_int(blob, node, "cdns,fifo-width", 4);
 
 	debug("%s: regbase=%p flashbase=%p trigger_base=%p max-frequency=%d page-size=%d\n",
 	      __func__, plat->regbase, plat->flashbase, plat->trigger_base,
diff --git a/drivers/spi/cadence_qspi.h b/drivers/spi/cadence_qspi.h
index 7341339..91f38f1 100644
--- a/drivers/spi/cadence_qspi.h
+++ b/drivers/spi/cadence_qspi.h
@@ -27,6 +27,7 @@ struct cadence_spi_platdata {
 	u32		tchsh_ns;
 	u32		tslch_ns;
 	u32		sram_size;
+	u32		fifo_width;
 };
 
 struct cadence_spi_priv {
diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c
index 2638f00..478b5a0 100644
--- a/drivers/spi/cadence_qspi_apb.c
+++ b/drivers/spi/cadence_qspi_apb.c
@@ -34,8 +34,6 @@
 #define CQSPI_REG_RETRY				(10000)
 #define CQSPI_POLL_IDLE_RETRY			(3)
 
-#define CQSPI_FIFO_WIDTH			(4)
-
 #define CQSPI_REG_SRAM_THRESHOLD_WORDS		(50)
 
 /* Transfer mode */
@@ -48,9 +46,6 @@
 #define CQSPI_DUMMY_CLKS_PER_BYTE		(8)
 #define CQSPI_DUMMY_BYTES_MAX			(4)
 
-
-#define CQSPI_REG_SRAM_FILL_THRESHOLD	\
-	((CQSPI_REG_SRAM_SIZE_WORD / 2) * CQSPI_FIFO_WIDTH)
 /****************************************************************************
  * Controller's configuration and status register (offset from QSPI_BASE)
  ****************************************************************************/
@@ -214,7 +209,7 @@ static void cadence_qspi_apb_read_fifo_data(void *dest,
 }
 
 static void cadence_qspi_apb_write_fifo_data(const void *dest_ahb_addr,
-	const void *src, unsigned int bytes)
+	const void *src, unsigned int fifo_width, unsigned int bytes)
 {
 	unsigned int temp = 0;
 	int i;
@@ -222,11 +217,11 @@ static void cadence_qspi_apb_write_fifo_data(const void *dest_ahb_addr,
 	unsigned int *dest_ptr = (unsigned int *)dest_ahb_addr;
 	unsigned int *src_ptr = (unsigned int *)src;
 
-	while (remaining >= CQSPI_FIFO_WIDTH) {
-		for (i = CQSPI_FIFO_WIDTH/sizeof(src_ptr) - 1; i >= 0; i--)
+	while (remaining >= fifo_width) {
+		for (i = fifo_width/sizeof(src_ptr) - 1; i >= 0; i--)
 			writel(*(src_ptr+i), dest_ptr+i);
-		src_ptr += CQSPI_FIFO_WIDTH/sizeof(src_ptr);
-		remaining -= CQSPI_FIFO_WIDTH;
+		src_ptr += fifo_width/sizeof(src_ptr);
+		remaining -= fifo_width;
 	}
 	if (remaining) {
 		/* dangling bytes */
@@ -241,7 +236,7 @@ static void cadence_qspi_apb_write_fifo_data(const void *dest_ahb_addr,
 
 /* Read from SRAM FIFO with polling SRAM fill level. */
 static int qspi_read_sram_fifo_poll(const void *reg_base, void *dest_addr,
-			const void *src_addr,  unsigned int num_bytes)
+	const void *src_addr, unsigned int fifo_width, unsigned int num_bytes)
 {
 	unsigned int remaining = num_bytes;
 	unsigned int retry;
@@ -263,7 +258,7 @@ static int qspi_read_sram_fifo_poll(const void *reg_base, void *dest_addr,
 			return -1;
 		}
 
-		sram_level *= CQSPI_FIFO_WIDTH;
+		sram_level *= fifo_width;
 		sram_level = sram_level > remaining ? remaining : sram_level;
 
 		/* Read data from FIFO. */
@@ -305,7 +300,8 @@ static int qpsi_write_sram_fifo_push(struct cadence_spi_platdata *plat,
 		wr_bytes = (remaining > page_size) ?
 					page_size : remaining;
 
-		cadence_qspi_apb_write_fifo_data(dest_addr, src, wr_bytes);
+		cadence_qspi_apb_write_fifo_data(dest_addr, src,
+						 plat->fifo_width, wr_bytes);
 		src += wr_bytes;
 		remaining -= wr_bytes;
 	}
@@ -752,7 +748,7 @@ int cadence_qspi_apb_indirect_read_execute(struct cadence_spi_platdata *plat,
 	       plat->regbase + CQSPI_REG_INDIRECTRD);
 
 	if (qspi_read_sram_fifo_poll(plat->regbase, (void *)rxbuf,
-				     (const void *)plat->trigger_base, rxlen))
+		(const void *)plat->trigger_base, plat->fifo_width, rxlen))
 		goto failrd;
 
 	/* Check flash indirect controller */
-- 
1.7.9.5

[U-Boot] [PATCH v5 1/5] spi: cadence_qspi: move trigger base configuration in init

[Marek Vasut]

On Thursday, August 27, 2015 at 12:44:26 AM, Vikas Manocha wrote:
> No need to configure indirect trigger address for every read/write.
> 
> Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
> ---
> 
> Changes in v5: fixed type cast compilation warnings.
> Changes in v4: removed extra type casts.
> Changes in v3: added commit message & removed extra bracket.
> Changes in v2: Rebased to master
> 
>  drivers/spi/cadence_qspi_apb.c |    9 ++-------
>  1 file changed, 2 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/spi/cadence_qspi_apb.c
> b/drivers/spi/cadence_qspi_apb.c index d053407..d377ad1 100644
> --- a/drivers/spi/cadence_qspi_apb.c
> +++ b/drivers/spi/cadence_qspi_apb.c
> @@ -534,6 +534,8 @@ void cadence_qspi_apb_controller_init(struct
> cadence_spi_platdata *plat)
> 
>  	/* Indirect mode configurations */
>  	writel((plat->sram_size/2), plat->regbase + CQSPI_REG_SRAMPARTITION);
> +	writel((u32)plat->ahbbase & CQSPI_INDIRECTTRIGGER_ADDR_MASK,

Why can't you just drop this masking and the cast ?

> +	       plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
> 
>  	/* Disable all interrupts */
>  	writel(0, plat->regbase + CQSPI_REG_IRQMASK);

[...]

Best regards,
Marek Vasut

[U-Boot] [PATCH v5 2/5] spi: cadence_qspi: fix indirect read/write start address

[Marek Vasut]

On Thursday, August 27, 2015 at 12:44:27 AM, Vikas Manocha wrote:
> Indirect read/write start addresses are flash start addresses for indirect
> read or write transfers. These should be absolute flash addresses instead
> of offsets.

Can you elaborate on this "flash address" thing you keep flinging around?
What does that mean exactly ? This is very ambiguous thing.

> Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
> ---
> 
> Changes in v5: fixed type cast compilation warnings.
> Changes in v4: removed extra type casts.
> Changes in v3: none
> Changes in v2: Rebased to master
> 
>  drivers/spi/cadence_qspi_apb.c |    6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/spi/cadence_qspi_apb.c
> b/drivers/spi/cadence_qspi_apb.c index d377ad1..c5b14c5 100644
> --- a/drivers/spi/cadence_qspi_apb.c
> +++ b/drivers/spi/cadence_qspi_apb.c
> @@ -705,7 +705,8 @@ int cadence_qspi_apb_indirect_read_setup(struct
> cadence_spi_platdata *plat,
> 
>  	/* Get address */
>  	addr_value = cadence_qspi_apb_cmd2addr(&cmdbuf[1], addr_bytes);
> -	writel(addr_value, plat->regbase + CQSPI_REG_INDIRECTRDSTARTADDR);
> +	writel((u32)plat->ahbbase + addr_value,

The cast is not needed.

> +	       plat->regbase + CQSPI_REG_INDIRECTRDSTARTADDR);
> 
>  	/* The remaining lenght is dummy bytes. */
>  	dummy_bytes = cmdlen - addr_bytes - 1;
> @@ -795,7 +796,8 @@ int cadence_qspi_apb_indirect_write_setup(struct
> cadence_spi_platdata *plat,
> 
>  	/* Setup write address. */
>  	reg = cadence_qspi_apb_cmd2addr(&cmdbuf[1], addr_bytes);
> -	writel(reg, plat->regbase + CQSPI_REG_INDIRECTWRSTARTADDR);
> +	writel((u32)plat->ahbbase + reg,

DTTO

> +	       plat->regbase + CQSPI_REG_INDIRECTWRSTARTADDR);
> 
>  	reg = readl(plat->regbase + CQSPI_REG_SIZE);
>  	reg &= ~CQSPI_REG_SIZE_ADDRESS_MASK;

Best regards,
Marek Vasut

[U-Boot] [PATCH v5 3/5] spi: cadence_qspi: fix base trigger address & transfer start address

[Marek Vasut]

On Thursday, August 27, 2015 at 12:44:28 AM, Vikas Manocha wrote:
> This patch is to separate the base trigger from the read/write transfer
> start addresses.
> 
> Base trigger register address (0x1c register) corresponds to the address
> which should be put on AHB bus to handle indirect transfer triggered
> before.
> 
> To handle indirect transfer we need to issue addresses from (value of 0x1c)
> to (value of 0x1c) + 15*4 ("4" corresponds to size of SRAM location).
> There are no obstacles in issuing const address just equal to 0x1c.
> Important thing to note is that indirect trigger address has nothing in
> common with your physical or mapped NOR Flash address.
> 
> Transfer read/write start addresses (offset 0x68/0x78)should be programmed
> with the absolute flash address to be read/written.
> 
> plat->triggerbase is added in device tree for mapped spi flash address.
> 
> Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
> ---
> 
> Changes in v5: None.
> Changes in v4:
> - fifo-width & trigger address alligned to linux device tree binding.
> - renaming of one parameter moved to separate patch.
> - trigger address of socfpga reverted back to 0x0.
> 
> Changes in v3: formatted string breaking fixed.
> Changes in v2: Rebased to master
> 
>  arch/arm/dts/socfpga.dtsi      |    1 +
>  arch/arm/dts/stv0991.dts       |    1 +
>  drivers/spi/cadence_qspi.c     |    9 +++++----
>  drivers/spi/cadence_qspi.h     |    1 +
>  drivers/spi/cadence_qspi_apb.c |    7 +++----
>  5 files changed, 11 insertions(+), 8 deletions(-)
> 
> diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
> index 9b12420..fe6ad80 100644
> --- a/arch/arm/dts/socfpga.dtsi
> +++ b/arch/arm/dts/socfpga.dtsi
> @@ -639,6 +639,7 @@
>  			ext-decoder = <0>;  /* external decoder */
>  			num-cs = <4>;
>  			fifo-depth = <128>;
> +			cdns,trigger-address = <0x0 0x0010>;

So you coin this DT prop as a touple here, but in Linux it's has a single
element. This will make dealing with the bindings an outright horror.

>  			sram-size = <128>;
>  			bus-num = <2>;
>  			status = "disabled";
> diff --git a/arch/arm/dts/stv0991.dts b/arch/arm/dts/stv0991.dts
> index fa3fd64..192d9e5 100644
> --- a/arch/arm/dts/stv0991.dts
> +++ b/arch/arm/dts/stv0991.dts
> @@ -33,6 +33,7 @@
>  				<0x40000000 0x1000000>;
>  			clocks = <3750000>;
>  			sram-size = <256>;
> +			cdns,trigger-address = <0x40000000 0x0000010>;
>  			status = "okay";
> 
>  			flash0: n25q32 at 0 {
> diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c
> index 34a0f46..0d1abc8 100644
> --- a/drivers/spi/cadence_qspi.c
> +++ b/drivers/spi/cadence_qspi.c
> @@ -290,6 +290,8 @@ static int cadence_spi_ofdata_to_platdata(struct
> udevice *bus)
> 
>  	plat->regbase = (void *)data[0];
>  	plat->ahbbase = (void *)data[2];
> +	plat->trigger_base = (u32 *)fdtdec_get_addr(blob, node,
> +						    "cdns,trigger-address");

Drop the cast.

>  	/* Use 500KHz as a suitable default */
>  	plat->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency",
> @@ -311,10 +313,9 @@ static int cadence_spi_ofdata_to_platdata(struct
> udevice *bus) plat->tslch_ns = fdtdec_get_int(blob, subnode, "tslch-ns",
> 20);
>  	plat->sram_size = fdtdec_get_int(blob, node, "sram-size", 128);
> 
> -	debug("%s: regbase=%p ahbbase=%p max-frequency=%d page-size=%d\n",
> -	      __func__, plat->regbase, plat->ahbbase, plat->max_hz,
> -	      plat->page_size);
> -
> +	debug("%s: regbase=%p ahbbase=%p trigger_base=%p max-frequency=%d
> page-size=%d\n", +	      __func__, plat->regbase, plat->ahbbase,
> plat->trigger_base, +	      plat->max_hz, plat->page_size);
>  	return 0;
>  }
> 
> diff --git a/drivers/spi/cadence_qspi.h b/drivers/spi/cadence_qspi.h
> index 98e57aa..2f1bd92 100644
> --- a/drivers/spi/cadence_qspi.h
> +++ b/drivers/spi/cadence_qspi.h
> @@ -18,6 +18,7 @@ struct cadence_spi_platdata {
>  	unsigned int	max_hz;
>  	void		*regbase;
>  	void		*ahbbase;
> +	void		*trigger_base;
> 
>  	u32		page_size;
>  	u32		block_size;
> diff --git a/drivers/spi/cadence_qspi_apb.c
> b/drivers/spi/cadence_qspi_apb.c index c5b14c5..8156b2b 100644
> --- a/drivers/spi/cadence_qspi_apb.c
> +++ b/drivers/spi/cadence_qspi_apb.c
> @@ -44,7 +44,6 @@
>  #define CQSPI_INST_TYPE_QUAD			(2)
> 
>  #define CQSPI_STIG_DATA_LEN_MAX			(8)
> -#define CQSPI_INDIRECTTRIGGER_ADDR_MASK		(0xFFFFF)
> 
>  #define CQSPI_DUMMY_CLKS_PER_BYTE		(8)
>  #define CQSPI_DUMMY_BYTES_MAX			(4)
> @@ -281,7 +280,7 @@ static int qpsi_write_sram_fifo_push(struct
> cadence_spi_platdata *plat, const void *src_addr, unsigned int num_bytes)
>  {
>  	const void *reg_base = plat->regbase;
> -	void *dest_addr = plat->ahbbase;
> +	void *dest_addr = plat->trigger_base;

This can be const void *

>  	unsigned int retry = CQSPI_REG_RETRY;
>  	unsigned int sram_level;
>  	unsigned int wr_bytes;
> @@ -534,7 +533,7 @@ void cadence_qspi_apb_controller_init(struct
> cadence_spi_platdata *plat)
> 
>  	/* Indirect mode configurations */
>  	writel((plat->sram_size/2), plat->regbase + CQSPI_REG_SRAMPARTITION);
> -	writel((u32)plat->ahbbase & CQSPI_INDIRECTTRIGGER_ADDR_MASK,
> +	writel((u32)plat->trigger_base,

Drop the cast.

>  	       plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
> 
>  	/* Disable all interrupts */
> @@ -753,7 +752,7 @@ int cadence_qspi_apb_indirect_read_execute(struct
> cadence_spi_platdata *plat, plat->regbase + CQSPI_REG_INDIRECTRD);
> 
>  	if (qspi_read_sram_fifo_poll(plat->regbase, (void *)rxbuf,
> -				     (const void *)plat->ahbbase, rxlen))
> +				     (const void *)plat->trigger_base, rxlen))

Drop the cast.

>  		goto failrd;
> 
>  	/* Check flash indirect controller */

[U-Boot] [PATCH v5 1/5] spi: cadence_qspi: move trigger base configuration in init

[Vikas MANOCHA]

Hi,

> -----Original Message-----
> From: Marek Vasut [mailto:marex at denx.de]
> Sent: Thursday, August 27, 2015 1:36 AM
> To: Vikas MANOCHA
> Cc: u-boot at lists.denx.de; sr at denx.de; grmoore at opensource.altera.com;
> jteki at openedev.com
> Subject: Re: [PATCH v5 1/5] spi: cadence_qspi: move trigger base
> configuration in init
> 
> On Thursday, August 27, 2015 at 12:44:26 AM, Vikas Manocha wrote:
> > No need to configure indirect trigger address for every read/write.
> >
> > Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
> > ---
> >
> > Changes in v5: fixed type cast compilation warnings.
> > Changes in v4: removed extra type casts.
> > Changes in v3: added commit message & removed extra bracket.
> > Changes in v2: Rebased to master
> >
> >  drivers/spi/cadence_qspi_apb.c |    9 ++-------
> >  1 file changed, 2 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/spi/cadence_qspi_apb.c
> > b/drivers/spi/cadence_qspi_apb.c index d053407..d377ad1 100644
> > --- a/drivers/spi/cadence_qspi_apb.c
> > +++ b/drivers/spi/cadence_qspi_apb.c
> > @@ -534,6 +534,8 @@ void cadence_qspi_apb_controller_init(struct
> > cadence_spi_platdata *plat)
> >
> >  	/* Indirect mode configurations */
> >  	writel((plat->sram_size/2), plat->regbase +
> > CQSPI_REG_SRAMPARTITION);
> > +	writel((u32)plat->ahbbase &
> CQSPI_INDIRECTTRIGGER_ADDR_MASK,
> 
> Why can't you just drop this masking and the cast ?

Masking is dropped in another patch in same series.
Casting is required as ahbbase is a pointer.

> 
> > +	       plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
> >
> >  	/* Disable all interrupts */
> >  	writel(0, plat->regbase + CQSPI_REG_IRQMASK);
> 
> [...]
> 
> Best regards,
> Marek Vasut

[U-Boot] [PATCH v5 1/5] spi: cadence_qspi: move trigger base configuration in init

[Marek Vasut]

On Thursday, August 27, 2015 at 05:46:12 PM, Vikas MANOCHA wrote:
> Hi,
> 
> > -----Original Message-----
> > From: Marek Vasut [mailto:marex at denx.de]
> > Sent: Thursday, August 27, 2015 1:36 AM
> > To: Vikas MANOCHA
> > Cc: u-boot at lists.denx.de; sr at denx.de; grmoore at opensource.altera.com;
> > jteki at openedev.com
> > Subject: Re: [PATCH v5 1/5] spi: cadence_qspi: move trigger base
> > configuration in init
> > 
> > On Thursday, August 27, 2015 at 12:44:26 AM, Vikas Manocha wrote:
> > > No need to configure indirect trigger address for every read/write.
> > > 
> > > Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
> > > ---
> > > 
> > > Changes in v5: fixed type cast compilation warnings.
> > > Changes in v4: removed extra type casts.
> > > Changes in v3: added commit message & removed extra bracket.
> > > Changes in v2: Rebased to master
> > > 
> > >  drivers/spi/cadence_qspi_apb.c |    9 ++-------
> > >  1 file changed, 2 insertions(+), 7 deletions(-)
> > > 
> > > diff --git a/drivers/spi/cadence_qspi_apb.c
> > > b/drivers/spi/cadence_qspi_apb.c index d053407..d377ad1 100644
> > > --- a/drivers/spi/cadence_qspi_apb.c
> > > +++ b/drivers/spi/cadence_qspi_apb.c
> > > @@ -534,6 +534,8 @@ void cadence_qspi_apb_controller_init(struct
> > > cadence_spi_platdata *plat)
> > > 
> > >  	/* Indirect mode configurations */
> > >  	writel((plat->sram_size/2), plat->regbase +
> > > 
> > > CQSPI_REG_SRAMPARTITION);
> > > +	writel((u32)plat->ahbbase &
> > 
> > CQSPI_INDIRECTTRIGGER_ADDR_MASK,
> > 
> > Why can't you just drop this masking and the cast ?
> 
> Masking is dropped in another patch in same series.

So you're adding broken code first only to fix it later ? I don't like this.

> Casting is required as ahbbase is a pointer.

ahbbase is used as u32 value all around the place, so just fix it to u32
and drop the cast.

Best regards,
Marek Vasut

[U-Boot] [PATCH v5 1/5] spi: cadence_qspi: move trigger base configuration in init

[Vikas MANOCHA]

Hi,

> -----Original Message-----
> From: Marek Vasut [mailto:marex at denx.de]
> Sent: Thursday, August 27, 2015 8:52 AM
> To: Vikas MANOCHA
> Cc: u-boot at lists.denx.de; sr at denx.de; grmoore at opensource.altera.com;
> jteki at openedev.com
> Subject: Re: [PATCH v5 1/5] spi: cadence_qspi: move trigger base
> configuration in init
> 
> On Thursday, August 27, 2015 at 05:46:12 PM, Vikas MANOCHA wrote:
> > Hi,
> >
> > > -----Original Message-----
> > > From: Marek Vasut [mailto:marex at denx.de]
> > > Sent: Thursday, August 27, 2015 1:36 AM
> > > To: Vikas MANOCHA
> > > Cc: u-boot at lists.denx.de; sr at denx.de;
> grmoore at opensource.altera.com;
> > > jteki at openedev.com
> > > Subject: Re: [PATCH v5 1/5] spi: cadence_qspi: move trigger base
> > > configuration in init
> > >
> > > On Thursday, August 27, 2015 at 12:44:26 AM, Vikas Manocha wrote:
> > > > No need to configure indirect trigger address for every read/write.
> > > >
> > > > Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
> > > > ---
> > > >
> > > > Changes in v5: fixed type cast compilation warnings.
> > > > Changes in v4: removed extra type casts.
> > > > Changes in v3: added commit message & removed extra bracket.
> > > > Changes in v2: Rebased to master
> > > >
> > > >  drivers/spi/cadence_qspi_apb.c |    9 ++-------
> > > >  1 file changed, 2 insertions(+), 7 deletions(-)
> > > >
> > > > diff --git a/drivers/spi/cadence_qspi_apb.c
> > > > b/drivers/spi/cadence_qspi_apb.c index d053407..d377ad1 100644
> > > > --- a/drivers/spi/cadence_qspi_apb.c
> > > > +++ b/drivers/spi/cadence_qspi_apb.c
> > > > @@ -534,6 +534,8 @@ void cadence_qspi_apb_controller_init(struct
> > > > cadence_spi_platdata *plat)
> > > >
> > > >  	/* Indirect mode configurations */
> > > >  	writel((plat->sram_size/2), plat->regbase +
> > > >
> > > > CQSPI_REG_SRAMPARTITION);
> > > > +	writel((u32)plat->ahbbase &
> > >
> > > CQSPI_INDIRECTTRIGGER_ADDR_MASK,
> > >
> > > Why can't you just drop this masking and the cast ?
> >
> > Masking is dropped in another patch in same series.
> 
> So you're adding broken code first only to fix it later ? I don't like this.

Try to understand the code, if you drop masking here, that will break the code.

> 
> > Casting is required as ahbbase is a pointer.
> 
> ahbbase is used as u32 value all around the place, so just fix it to u32 and
> drop the cast.

Check ahbbase, it is declared as pointer. This patch is not to fix ahbbase type.

Cheers,
Vikas

> 
> Best regards,
> Marek Vasut

[U-Boot] [PATCH v5 2/5] spi: cadence_qspi: fix indirect read/write start address

[Vikas MANOCHA]

Hi,

> -----Original Message-----
> From: Marek Vasut [mailto:marex at denx.de]
> Sent: Thursday, August 27, 2015 1:38 AM
> To: Vikas MANOCHA
> Cc: u-boot at lists.denx.de; sr at denx.de; grmoore at opensource.altera.com;
> jteki at openedev.com
> Subject: Re: [PATCH v5 2/5] spi: cadence_qspi: fix indirect read/write start
> address
> 
> On Thursday, August 27, 2015 at 12:44:27 AM, Vikas Manocha wrote:
> > Indirect read/write start addresses are flash start addresses for
> > indirect read or write transfers. These should be absolute flash
> > addresses instead of offsets.
> 
> Can you elaborate on this "flash address" thing you keep flinging around?
> What does that mean exactly ? This is very ambiguous thing.

It's not rocket science, study this  link & you will stop wondering (esp first line of "NOR memories"):
https://en.wikipedia.org/wiki/Flash_memory

> 
> > Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
> > ---
> >
> > Changes in v5: fixed type cast compilation warnings.
> > Changes in v4: removed extra type casts.
> > Changes in v3: none
> > Changes in v2: Rebased to master
> >
> >  drivers/spi/cadence_qspi_apb.c |    6 ++++--
> >  1 file changed, 4 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/spi/cadence_qspi_apb.c
> > b/drivers/spi/cadence_qspi_apb.c index d377ad1..c5b14c5 100644
> > --- a/drivers/spi/cadence_qspi_apb.c
> > +++ b/drivers/spi/cadence_qspi_apb.c
> > @@ -705,7 +705,8 @@ int cadence_qspi_apb_indirect_read_setup(struct
> > cadence_spi_platdata *plat,
> >
> >  	/* Get address */
> >  	addr_value = cadence_qspi_apb_cmd2addr(&cmdbuf[1],
> addr_bytes);
> > -	writel(addr_value, plat->regbase +
> CQSPI_REG_INDIRECTRDSTARTADDR);
> > +	writel((u32)plat->ahbbase + addr_value,
> 
> The cast is not needed.

Again, cast is required as ahbbase is pointer. 

> 
> > +	       plat->regbase + CQSPI_REG_INDIRECTRDSTARTADDR);
> >
> >  	/* The remaining lenght is dummy bytes. */
> >  	dummy_bytes = cmdlen - addr_bytes - 1; @@ -795,7 +796,8 @@ int
> > cadence_qspi_apb_indirect_write_setup(struct
> > cadence_spi_platdata *plat,
> >
> >  	/* Setup write address. */
> >  	reg = cadence_qspi_apb_cmd2addr(&cmdbuf[1], addr_bytes);
> > -	writel(reg, plat->regbase + CQSPI_REG_INDIRECTWRSTARTADDR);
> > +	writel((u32)plat->ahbbase + reg,
> 
> DTTO

Read above.

Cheers,
Vikas

> 
> > +	       plat->regbase + CQSPI_REG_INDIRECTWRSTARTADDR);
> >
> >  	reg = readl(plat->regbase + CQSPI_REG_SIZE);
> >  	reg &= ~CQSPI_REG_SIZE_ADDRESS_MASK;
> 
> Best regards,
> Marek Vasut

[U-Boot] [PATCH v5 3/5] spi: cadence_qspi: fix base trigger address & transfer start address

[Vikas MANOCHA]

Hi,

> -----Original Message-----
> From: Marek Vasut [mailto:marex at denx.de]
> Sent: Thursday, August 27, 2015 1:40 AM
> To: Vikas MANOCHA
> Cc: u-boot at lists.denx.de; sr at denx.de; grmoore at opensource.altera.com;
> jteki at openedev.com
> Subject: Re: [PATCH v5 3/5] spi: cadence_qspi: fix base trigger address &
> transfer start address
> 
> On Thursday, August 27, 2015 at 12:44:28 AM, Vikas Manocha wrote:
> > This patch is to separate the base trigger from the read/write
> > transfer start addresses.
> >
> > Base trigger register address (0x1c register) corresponds to the
> > address which should be put on AHB bus to handle indirect transfer
> > triggered before.
> >
> > To handle indirect transfer we need to issue addresses from (value of
> > 0x1c) to (value of 0x1c) + 15*4 ("4" corresponds to size of SRAM location).
> > There are no obstacles in issuing const address just equal to 0x1c.
> > Important thing to note is that indirect trigger address has nothing
> > in common with your physical or mapped NOR Flash address.
> >
> > Transfer read/write start addresses (offset 0x68/0x78)should be
> > programmed with the absolute flash address to be read/written.
> >
> > plat->triggerbase is added in device tree for mapped spi flash address.
> >
> > Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
> > ---
> >
> > Changes in v5: None.
> > Changes in v4:
> > - fifo-width & trigger address alligned to linux device tree binding.
> > - renaming of one parameter moved to separate patch.
> > - trigger address of socfpga reverted back to 0x0.
> >
> > Changes in v3: formatted string breaking fixed.
> > Changes in v2: Rebased to master
> >
> >  arch/arm/dts/socfpga.dtsi      |    1 +
> >  arch/arm/dts/stv0991.dts       |    1 +
> >  drivers/spi/cadence_qspi.c     |    9 +++++----
> >  drivers/spi/cadence_qspi.h     |    1 +
> >  drivers/spi/cadence_qspi_apb.c |    7 +++----
> >  5 files changed, 11 insertions(+), 8 deletions(-)
> >
> > diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
> > index 9b12420..fe6ad80 100644
> > --- a/arch/arm/dts/socfpga.dtsi
> > +++ b/arch/arm/dts/socfpga.dtsi
> > @@ -639,6 +639,7 @@
> >  			ext-decoder = <0>;  /* external decoder */
> >  			num-cs = <4>;
> >  			fifo-depth = <128>;
> > +			cdns,trigger-address = <0x0 0x0010>;
> 
> So you coin this DT prop as a touple here, but in Linux it's has a single
> element. This will make dealing with the bindings an outright horror.

Nothing is being coined, it is just left here from previous implementation, will remove it.

> 
> >  			sram-size = <128>;
> >  			bus-num = <2>;
> >  			status = "disabled";
> > diff --git a/arch/arm/dts/stv0991.dts b/arch/arm/dts/stv0991.dts index
> > fa3fd64..192d9e5 100644
> > --- a/arch/arm/dts/stv0991.dts
> > +++ b/arch/arm/dts/stv0991.dts
> > @@ -33,6 +33,7 @@
> >  				<0x40000000 0x1000000>;
> >  			clocks = <3750000>;
> >  			sram-size = <256>;
> > +			cdns,trigger-address = <0x40000000 0x0000010>;
> >  			status = "okay";
> >
> >  			flash0: n25q32 at 0 {
> > diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c
> > index 34a0f46..0d1abc8 100644
> > --- a/drivers/spi/cadence_qspi.c
> > +++ b/drivers/spi/cadence_qspi.c
> > @@ -290,6 +290,8 @@ static int cadence_spi_ofdata_to_platdata(struct
> > udevice *bus)
> >
> >  	plat->regbase = (void *)data[0];
> >  	plat->ahbbase = (void *)data[2];
> > +	plat->trigger_base = (u32 *)fdtdec_get_addr(blob, node,
> > +						    "cdns,trigger-address");
> 
> Drop the cast.

Trigger base is pointer.

> 
> >  	/* Use 500KHz as a suitable default */
> >  	plat->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency",
> @@
> > -311,10 +313,9 @@ static int cadence_spi_ofdata_to_platdata(struct
> > udevice *bus) plat->tslch_ns = fdtdec_get_int(blob, subnode,
> > "tslch-ns", 20);
> >  	plat->sram_size = fdtdec_get_int(blob, node, "sram-size", 128);
> >
> > -	debug("%s: regbase=%p ahbbase=%p max-frequency=%d page-
> size=%d\n",
> > -	      __func__, plat->regbase, plat->ahbbase, plat->max_hz,
> > -	      plat->page_size);
> > -
> > +	debug("%s: regbase=%p ahbbase=%p trigger_base=%p max-
> frequency=%d
> > page-size=%d\n", +	      __func__, plat->regbase, plat->ahbbase,
> > plat->trigger_base, +	      plat->max_hz, plat->page_size);
> >  	return 0;
> >  }
> >
> > diff --git a/drivers/spi/cadence_qspi.h b/drivers/spi/cadence_qspi.h
> > index 98e57aa..2f1bd92 100644
> > --- a/drivers/spi/cadence_qspi.h
> > +++ b/drivers/spi/cadence_qspi.h
> > @@ -18,6 +18,7 @@ struct cadence_spi_platdata {
> >  	unsigned int	max_hz;
> >  	void		*regbase;
> >  	void		*ahbbase;
> > +	void		*trigger_base;
> >
> >  	u32		page_size;
> >  	u32		block_size;
> > diff --git a/drivers/spi/cadence_qspi_apb.c
> > b/drivers/spi/cadence_qspi_apb.c index c5b14c5..8156b2b 100644
> > --- a/drivers/spi/cadence_qspi_apb.c
> > +++ b/drivers/spi/cadence_qspi_apb.c
> > @@ -44,7 +44,6 @@
> >  #define CQSPI_INST_TYPE_QUAD			(2)
> >
> >  #define CQSPI_STIG_DATA_LEN_MAX			(8)
> > -#define CQSPI_INDIRECTTRIGGER_ADDR_MASK		(0xFFFFF)
> >
> >  #define CQSPI_DUMMY_CLKS_PER_BYTE		(8)
> >  #define CQSPI_DUMMY_BYTES_MAX			(4)
> > @@ -281,7 +280,7 @@ static int qpsi_write_sram_fifo_push(struct
> > cadence_spi_platdata *plat, const void *src_addr, unsigned int
> > num_bytes)  {
> >  	const void *reg_base = plat->regbase;
> > -	void *dest_addr = plat->ahbbase;
> > +	void *dest_addr = plat->trigger_base;
> 
> This can be const void *

Could be but not relevant to this patch.

> 
> >  	unsigned int retry = CQSPI_REG_RETRY;
> >  	unsigned int sram_level;
> >  	unsigned int wr_bytes;
> > @@ -534,7 +533,7 @@ void cadence_qspi_apb_controller_init(struct
> > cadence_spi_platdata *plat)
> >
> >  	/* Indirect mode configurations */
> >  	writel((plat->sram_size/2), plat->regbase +
> CQSPI_REG_SRAMPARTITION);
> > -	writel((u32)plat->ahbbase &
> CQSPI_INDIRECTTRIGGER_ADDR_MASK,
> > +	writel((u32)plat->trigger_base,
> 
> Drop the cast.

Trigger base is pointer.

> 
> >  	       plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
> >
> >  	/* Disable all interrupts */
> > @@ -753,7 +752,7 @@ int
> cadence_qspi_apb_indirect_read_execute(struct
> > cadence_spi_platdata *plat, plat->regbase + CQSPI_REG_INDIRECTRD);
> >
> >  	if (qspi_read_sram_fifo_poll(plat->regbase, (void *)rxbuf,
> > -				     (const void *)plat->ahbbase, rxlen))
> > +				     (const void *)plat->trigger_base, rxlen))
> 
> Drop the cast.

DITTO

Cheers,
Vikas
> 
> >  		goto failrd;
> >
> >  	/* Check flash indirect controller */

[U-Boot] [PATCH v5 1/5] spi: cadence_qspi: move trigger base configuration in init

[Vikas MANOCHA]

Hi Marek,

> -----Original Message-----
> From: Vikas MANOCHA
> Sent: Thursday, August 27, 2015 9:03 AM
> To: Marek Vasut
> Cc: u-boot at lists.denx.de; sr at denx.de; grmoore at opensource.altera.com;
> jteki at openedev.com
> Subject: RE: [PATCH v5 1/5] spi: cadence_qspi: move trigger base
> configuration in init
> 
> Hi,
> 
> > -----Original Message-----
> > From: Marek Vasut [mailto:marex at denx.de]
> > Sent: Thursday, August 27, 2015 8:52 AM
> > To: Vikas MANOCHA
> > Cc: u-boot at lists.denx.de; sr at denx.de; grmoore at opensource.altera.com;
> > jteki at openedev.com
> > Subject: Re: [PATCH v5 1/5] spi: cadence_qspi: move trigger base
> > configuration in init
> >
> > On Thursday, August 27, 2015 at 05:46:12 PM, Vikas MANOCHA wrote:
> > > Hi,
> > >
> > > > -----Original Message-----
> > > > From: Marek Vasut [mailto:marex at denx.de]
> > > > Sent: Thursday, August 27, 2015 1:36 AM
> > > > To: Vikas MANOCHA
> > > > Cc: u-boot at lists.denx.de; sr at denx.de;
> > grmoore at opensource.altera.com;
> > > > jteki at openedev.com
> > > > Subject: Re: [PATCH v5 1/5] spi: cadence_qspi: move trigger base
> > > > configuration in init
> > > >
> > > > On Thursday, August 27, 2015 at 12:44:26 AM, Vikas Manocha wrote:
> > > > > No need to configure indirect trigger address for every read/write.
> > > > >
> > > > > Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
> > > > > ---
> > > > >
> > > > > Changes in v5: fixed type cast compilation warnings.
> > > > > Changes in v4: removed extra type casts.
> > > > > Changes in v3: added commit message & removed extra bracket.
> > > > > Changes in v2: Rebased to master
> > > > >
> > > > >  drivers/spi/cadence_qspi_apb.c |    9 ++-------
> > > > >  1 file changed, 2 insertions(+), 7 deletions(-)
> > > > >
> > > > > diff --git a/drivers/spi/cadence_qspi_apb.c
> > > > > b/drivers/spi/cadence_qspi_apb.c index d053407..d377ad1 100644
> > > > > --- a/drivers/spi/cadence_qspi_apb.c
> > > > > +++ b/drivers/spi/cadence_qspi_apb.c
> > > > > @@ -534,6 +534,8 @@ void cadence_qspi_apb_controller_init(struct
> > > > > cadence_spi_platdata *plat)
> > > > >
> > > > >  	/* Indirect mode configurations */
> > > > >  	writel((plat->sram_size/2), plat->regbase +
> > > > >
> > > > > CQSPI_REG_SRAMPARTITION);
> > > > > +	writel((u32)plat->ahbbase &
> > > >
> > > > CQSPI_INDIRECTTRIGGER_ADDR_MASK,
> > > >
> > > > Why can't you just drop this masking and the cast ?
> > >
> > > Masking is dropped in another patch in same series.
> >
> > So you're adding broken code first only to fix it later ? I don't like this.
> 
> Try to understand the code, if you drop masking here, that will break the
> code.
> 
> >
> > > Casting is required as ahbbase is a pointer.
> >
> > ahbbase is used as u32 value all around the place, so just fix it to
> > u32 and drop the cast.
> 
> Check ahbbase, it is declared as pointer. This patch is not to fix ahbbase type.

Let me know if you have any more comments for this v5.

Cheers,
Vikas

> 
> Cheers,
> Vikas
> 
> >
> > Best regards,
> > Marek Vasut