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[U-Boot,v2,1/3] spi: cadence_qspi: move the sram partition in init

Message ID 1435187779-3382-2-git-send-email-vikas.manocha@st.com
State Superseded
Delegated to: Jagannadha Sutradharudu Teki
Headers show

Commit Message

Vikas MANOCHA June 24, 2015, 11:16 p.m. UTC 
There is no need to re-configure sram partition for every read/write for
better full use of sram for read or write. This patch divides the half
sram for read & half for write once at initialization.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Tested-by: Stefan Roese <sr@denx.de>
---

Changes in v2: None

 drivers/spi/cadence_qspi_apb.c |   16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)
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Patch

diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c
index 00a115f..f2c22af 100644
--- a/drivers/spi/cadence_qspi_apb.c
+++ b/drivers/spi/cadence_qspi_apb.c
@@ -38,10 +38,7 @@ 
 
 /* Controller sram size in word */
 #define CQSPI_REG_SRAM_SIZE_WORD		(128)
-#define CQSPI_REG_SRAM_RESV_WORDS		(2)
-#define CQSPI_REG_SRAM_PARTITION_WR		(1)
-#define CQSPI_REG_SRAM_PARTITION_RD		\
-	(CQSPI_REG_SRAM_SIZE_WORD - CQSPI_REG_SRAM_RESV_WORDS)
+#define CQSPI_REG_SRAM_PARTITION_RD		(CQSPI_REG_SRAM_SIZE_WORD/2)
 #define CQSPI_REG_SRAM_THRESHOLD_WORDS		(50)
 
 /* Transfer mode */
@@ -538,6 +535,10 @@  void cadence_qspi_apb_controller_init(struct cadence_spi_platdata *plat)
 	/* Configure the remap address register, no remap */
 	writel(0, plat->regbase + CQSPI_REG_REMAP);
 
+	/* Indirect mode configurations */
+	writel(CQSPI_REG_SRAM_PARTITION_RD,
+		plat->regbase + CQSPI_REG_SRAMPARTITION);
+
 	/* Disable all interrupts */
 	writel(0, plat->regbase + CQSPI_REG_IRQMASK);
 
@@ -700,10 +701,6 @@  int cadence_qspi_apb_indirect_read_setup(struct cadence_spi_platdata *plat,
 	writel(((u32)plat->ahbbase & CQSPI_INDIRECTTRIGGER_ADDR_MASK),
 	       plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
 
-	/* Configure SRAM partition for read. */
-	writel(CQSPI_REG_SRAM_PARTITION_RD, plat->regbase +
-	       CQSPI_REG_SRAMPARTITION);
-
 	/* Configure the opcode */
 	rd_reg = cmdbuf[0] << CQSPI_REG_RD_INSTR_OPCODE_LSB;
 
@@ -801,9 +798,6 @@  int cadence_qspi_apb_indirect_write_setup(struct cadence_spi_platdata *plat,
 	writel(((u32)plat->ahbbase & CQSPI_INDIRECTTRIGGER_ADDR_MASK),
 	       plat->regbase + CQSPI_REG_INDIRECTTRIGGER);
 
-	writel(CQSPI_REG_SRAM_PARTITION_WR,
-	       plat->regbase + CQSPI_REG_SRAMPARTITION);
-
 	/* Configure the opcode */
 	reg = cmdbuf[0] << CQSPI_REG_WR_INSTR_OPCODE_LSB;
 	writel(reg, plat->regbase + CQSPI_REG_WR_INSTR);