From c0535c0ef0b7e7a3e4c1011266bf26baf94fd4a3 Mon Sep 17 00:00:00 2001 From: Vikas Manocha Date: Thu, 2 Jul 2015 18:29:43 -0700 Subject: [PATCH] spi: cadence_qspi: move the sram partition in init 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 Tested-by: Stefan Roese Reviewed-by: Jagannadh Teki --- drivers/spi/cadence_qspi_apb.c | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-) diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c index 00a115f..fb78892 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); -- 2.7.4