[U-Boot] [v3 00/10] spi: cadence_qspi: sram depth from DT & fix for FIFO width

[U-Boot] [v3 00/10] spi: cadence_qspi: sram depth from DT & fix for FIFO width

[Vikas Manocha]

This patchset adds support to get controller sram size from device tree, fix to
support different FIFO widths & adds dt binding doc.

Also this patchset enables cadence qspi controller for stv0991 soc, saves
environment in spi flash & moves CONFIG_OF in the defconfig file.

Changes in v3:
- Clubbed two patchsets:
	1. [v2 0/3] spi: cadence_qspi: sram depth from DT & fix for FIFO width
	2. [v2 0/6] stv0991: enable cadence qspi controller & spi flash

Changes in v2:
- fix the checkpatch error.

Vikas Manocha (10):
  stv0991: enable saving enrironment in spi flash
  stv0991: move OF_CONTROL config to defconfig
  stv0991: remove define CONFIG_OF_SEPARATE from board file
  stv0991: configure clock & pad muxing for qspi
  stv0991: enable cadence qspi controller & spi flash
  stv0991: configure device tree for cadence qspi & flash
  spi: cadence_qspi: move the sram partition in init
  spi: cadence_qspi: get sram size from device tree
  spi: cadence_qspi: support FIFO width other than 4 bytes
  spi: cadence_qspi: add device tree binding doc

 arch/arm/cpu/armv7/stv0991/clock.c                 |    4 +-
 arch/arm/cpu/armv7/stv0991/pinmux.c                |    5 ++
 arch/arm/dts/socfpga.dtsi                          |    4 +-
 arch/arm/dts/socfpga_cyclone5_socrates.dts         |    1 -
 arch/arm/dts/stv0991.dts                           |   31 ++++++++++
 arch/arm/include/asm/arch-stv0991/stv0991_cgu.h    |   15 +++++
 arch/arm/include/asm/arch-stv0991/stv0991_creg.h   |    9 +++
 arch/arm/include/asm/arch-stv0991/stv0991_periph.h |    2 +
 board/st/stv0991/stv0991.c                         |    8 +++
 configs/stv0991_defconfig                          |    2 +-
 doc/device-tree-bindings/spi/spi-cadence.txt       |   28 +++++++++
 drivers/spi/cadence_qspi.c                         |    1 +
 drivers/spi/cadence_qspi.h                         |    1 +
 drivers/spi/cadence_qspi_apb.c                     |   62 ++++++++------------
 include/configs/stv0991.h                          |   24 +++++++-
 15 files changed, 152 insertions(+), 45 deletions(-)
 create mode 100644 doc/device-tree-bindings/spi/spi-cadence.txt

-- 
1.7.9.5

[U-Boot] [v3 01/10] stv0991: enable saving enrironment in spi flash

[Vikas Manocha]

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

Changes in v3: Rebased to spi-next-dev
Changes in v2: None

 configs/stv0991_defconfig |    1 -
 include/configs/stv0991.h |    4 +++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/configs/stv0991_defconfig b/configs/stv0991_defconfig
index 8e8ce9f..731ede1 100644
--- a/configs/stv0991_defconfig
+++ b/configs/stv0991_defconfig
@@ -7,7 +7,6 @@ CONFIG_AUTOBOOT_KEYED=y
 CONFIG_AUTOBOOT_PROMPT="Hit SPACE in %d seconds to stop autoboot.\n"
 CONFIG_AUTOBOOT_STOP_STR=" "
 # CONFIG_CMD_IMLS is not set
-# CONFIG_CMD_SAVEENV is not set
 # CONFIG_CMD_FLASH is not set
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_NETDEVICES=y
diff --git a/include/configs/stv0991.h b/include/configs/stv0991.h
index 6379fd3..d498c12 100644
--- a/include/configs/stv0991.h
+++ b/include/configs/stv0991.h
@@ -23,7 +23,9 @@
 #define PHYS_SDRAM_1_SIZE			0x00198000
 
 #define CONFIG_ENV_SIZE				0x10000
-#define CONFIG_ENV_IS_IN_FLASH
+#define CONFIG_ENV_IS_IN_SPI_FLASH
+#define CONFIG_ENV_SECT_SIZE			CONFIG_ENV_SIZE
+#define CONFIG_ENV_OFFSET			0x30000
 #define CONFIG_ENV_ADDR				\
 	(PHYS_SDRAM_1_SIZE - CONFIG_ENV_SIZE)
 #define CONFIG_SYS_MAXARGS			16
-- 
1.7.9.5

[U-Boot] [v3 02/10] stv0991: move OF_CONTROL config to defconfig

[Vikas Manocha]

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

Changes in v3: Rebased to spi-next-dev
Changes in v2: None

 configs/stv0991_defconfig |    1 +
 include/configs/stv0991.h |    1 -
 2 files changed, 1 insertion(+), 1 deletion(-)

diff --git a/configs/stv0991_defconfig b/configs/stv0991_defconfig
index 731ede1..3bdb1fc 100644
--- a/configs/stv0991_defconfig
+++ b/configs/stv0991_defconfig
@@ -11,3 +11,4 @@ CONFIG_AUTOBOOT_STOP_STR=" "
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_NETDEVICES=y
 CONFIG_ETH_DESIGNWARE=y
+CONFIG_OF_CONTROL=y
diff --git a/include/configs/stv0991.h b/include/configs/stv0991.h
index d498c12..ff82afc 100644
--- a/include/configs/stv0991.h
+++ b/include/configs/stv0991.h
@@ -75,6 +75,5 @@
 #define CONFIG_BOOTCOMMAND                     "go 0x40040000"
 
 #define CONFIG_OF_SEPARATE
-#define CONFIG_OF_CONTROL
 #define CONFIG_OF_LIBFDT
 #endif /* __CONFIG_H */
-- 
1.7.9.5

[U-Boot] [v3 03/10] stv0991: remove define CONFIG_OF_SEPARATE from board file

[Vikas Manocha]

CONFIG_OF_SEPARATE is default define with CONFIG_OF_CONTROL, removing
this define from the board file to avoid multiple definition warning.

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

Changes in v3: Rebased to spi-next-dev
Changes in v2: None

 include/configs/stv0991.h |    1 -
 1 file changed, 1 deletion(-)

diff --git a/include/configs/stv0991.h b/include/configs/stv0991.h
index ff82afc..718ef40 100644
--- a/include/configs/stv0991.h
+++ b/include/configs/stv0991.h
@@ -74,6 +74,5 @@
 #define CONFIG_BOOTDELAY                       3
 #define CONFIG_BOOTCOMMAND                     "go 0x40040000"
 
-#define CONFIG_OF_SEPARATE
 #define CONFIG_OF_LIBFDT
 #endif /* __CONFIG_H */
-- 
1.7.9.5

[U-Boot] [v3 04/10] stv0991: configure clock & pad muxing for qspi

[Vikas Manocha]

stv0991 has cadence qspi controller for flash interfacing, this
patch configures the device pads & clock for the controller.

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

Changes in v3: Rebased to spi-next-dev
Changes in v2:
- removed checkpatch.pl error.

 arch/arm/cpu/armv7/stv0991/clock.c                 |    4 +++-
 arch/arm/cpu/armv7/stv0991/pinmux.c                |    5 +++++
 arch/arm/include/asm/arch-stv0991/stv0991_cgu.h    |   15 +++++++++++++++
 arch/arm/include/asm/arch-stv0991/stv0991_creg.h   |    9 +++++++++
 arch/arm/include/asm/arch-stv0991/stv0991_periph.h |    2 ++
 board/st/stv0991/stv0991.c                         |    8 ++++++++
 6 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/arch/arm/cpu/armv7/stv0991/clock.c b/arch/arm/cpu/armv7/stv0991/clock.c
index 70b8a8d..26c0d36 100644
--- a/arch/arm/cpu/armv7/stv0991/clock.c
+++ b/arch/arm/cpu/armv7/stv0991/clock.c
@@ -33,7 +33,9 @@ void clock_setup(int peripheral)
 		/* Clock selection for ethernet tx_clk & rx_clk*/
 		writel((readl(&stv0991_cgu_regs->eth_ctrl) & ETH_CLK_MASK)
 				| ETH_CLK_CTRL, &stv0991_cgu_regs->eth_ctrl);
-
+		break;
+	case QSPI_CLOCK_CFG:
+		writel(QSPI_CLK_CTRL, &stv0991_cgu_regs->qspi_freq);
 		break;
 	default:
 		break;
diff --git a/arch/arm/cpu/armv7/stv0991/pinmux.c b/arch/arm/cpu/armv7/stv0991/pinmux.c
index 1d086a2..24c67fa 100644
--- a/arch/arm/cpu/armv7/stv0991/pinmux.c
+++ b/arch/arm/cpu/armv7/stv0991/pinmux.c
@@ -55,6 +55,11 @@ int stv0991_pinmux_config(int peripheral)
 				ETH_M_VDD_CFG, &stv0991_creg->vdd_pad1);
 
 		break;
+	case QSPI_CS_CLK_PAD:
+		writel((readl(&stv0991_creg->mux13) & FLASH_CS_NC_MASK) |
+				CFG_FLASH_CS_NC, &stv0991_creg->mux13);
+		writel((readl(&stv0991_creg->mux13) & FLASH_CLK_MASK) |
+				CFG_FLASH_CLK, &stv0991_creg->mux13);
 	default:
 		break;
 	}
diff --git a/arch/arm/include/asm/arch-stv0991/stv0991_cgu.h b/arch/arm/include/asm/arch-stv0991/stv0991_cgu.h
index ddcbb57..f0045f3 100644
--- a/arch/arm/include/asm/arch-stv0991/stv0991_cgu.h
+++ b/arch/arm/include/asm/arch-stv0991/stv0991_cgu.h
@@ -113,4 +113,19 @@ struct stv0991_cgu_regs {
 
 #define ETH_CLK_CTRL			(ETH_CLK_RX_EXT_PHY << RX_CLK_SHIFT \
 					| ETH_CLK_TX_EXT_PHY)
+/* CGU qspi clock */
+#define DIV_HCLK1_SHIFT			9
+#define DIV_CRYP_SHIFT			6
+#define MDIV_QSPI_SHIFT			3
+
+#define CLK_QSPI_OSC			0
+#define CLK_QSPI_MCLK			1
+#define CLK_QSPI_PLL1			2
+#define CLK_QSPI_PLL2			3
+
+#define QSPI_CLK_CTRL			(3 << DIV_HCLK1_SHIFT \
+					| 1 << DIV_CRYP_SHIFT \
+					| 0 << MDIV_QSPI_SHIFT \
+					| CLK_QSPI_OSC)
+
 #endif
diff --git a/arch/arm/include/asm/arch-stv0991/stv0991_creg.h b/arch/arm/include/asm/arch-stv0991/stv0991_creg.h
index c804eb5..737c952 100644
--- a/arch/arm/include/asm/arch-stv0991/stv0991_creg.h
+++ b/arch/arm/include/asm/arch-stv0991/stv0991_creg.h
@@ -49,6 +49,15 @@ struct stv0991_creg {
 	u32 vdd_comp1;		/* offset 0x400 */
 };
 
+/* CREG MUX 13 register */
+#define FLASH_CS_NC_SHIFT	4
+#define FLASH_CS_NC_MASK	~(7 << FLASH_CS_NC_SHIFT)
+#define CFG_FLASH_CS_NC		(0 << FLASH_CS_NC_SHIFT)
+
+#define FLASH_CLK_SHIFT		0
+#define FLASH_CLK_MASK		~(7 << FLASH_CLK_SHIFT)
+#define CFG_FLASH_CLK		(0 << FLASH_CLK_SHIFT)
+
 /* CREG MUX 12 register */
 #define GPIOC_30_MUX_SHIFT	24
 #define GPIOC_30_MUX_MASK	~(1 << GPIOC_30_MUX_SHIFT)
diff --git a/arch/arm/include/asm/arch-stv0991/stv0991_periph.h b/arch/arm/include/asm/arch-stv0991/stv0991_periph.h
index f728c83..725da83 100644
--- a/arch/arm/include/asm/arch-stv0991/stv0991_periph.h
+++ b/arch/arm/include/asm/arch-stv0991/stv0991_periph.h
@@ -18,6 +18,7 @@ enum periph_id {
 	UART_GPIOC_30_31 = 0,
 	UART_GPIOB_16_17,
 	ETH_GPIOB_10_31_C_0_4,
+	QSPI_CS_CLK_PAD,
 	PERIPH_ID_I2C0,
 	PERIPH_ID_I2C1,
 	PERIPH_ID_I2C2,
@@ -39,6 +40,7 @@ enum periph_id {
 enum periph_clock {
 	UART_CLOCK_CFG = 0,
 	ETH_CLOCK_CFG,
+	QSPI_CLOCK_CFG,
 };
 
 #endif /* __ASM_ARM_ARCH_PERIPH_H */
diff --git a/board/st/stv0991/stv0991.c b/board/st/stv0991/stv0991.c
index 09f973f..add1ce1 100644
--- a/board/st/stv0991/stv0991.c
+++ b/board/st/stv0991/stv0991.c
@@ -55,12 +55,20 @@ int board_eth_enable(void)
 	return 0;
 }
 
+int board_qspi_enable(void)
+{
+	stv0991_pinmux_config(QSPI_CS_CLK_PAD);
+	clock_setup(QSPI_CLOCK_CFG);
+	return 0;
+}
+
 /*
  * Miscellaneous platform dependent initialisations
  */
 int board_init(void)
 {
 	board_eth_enable();
+	board_qspi_enable();
 	return 0;
 }
 
-- 
1.7.9.5

[U-Boot] [v3 05/10] stv0991: enable cadence qspi controller & spi flash

[Vikas Manocha]

This patch does all the board configurations required to use the qspi
controller & attached spi flash memory.

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

Changes in v3: Rebased to spi-next-dev
Changes in v2: None

 include/configs/stv0991.h |   18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/include/configs/stv0991.h b/include/configs/stv0991.h
index 718ef40..a996cd1 100644
--- a/include/configs/stv0991.h
+++ b/include/configs/stv0991.h
@@ -75,4 +75,22 @@
 #define CONFIG_BOOTCOMMAND                     "go 0x40040000"
 
 #define CONFIG_OF_LIBFDT
+
+/*
++ * QSPI support
++ */
+#ifdef CONFIG_OF_CONTROL		/* QSPI is controlled via DT */
+#define CONFIG_DM_SPI
+#define CONFIG_CADENCE_QSPI
+#define CONFIG_CQSPI_DECODER		0
+#define CONFIG_CQSPI_REF_CLK		((30/4)/2)*1000*1000
+#define CONFIG_CMD_SPI
+
+#define CONFIG_SPI_FLASH		/* SPI flash subsystem */
+#define CONFIG_SPI_FLASH_STMICRO	/* Micron/Numonyx flash */
+#define CONFIG_SPI_FLASH_WINBOND	/* WINBOND */
+#define CONFIG_CMD_SF
+#define CONFIG_DM_SPI_FLASH
+#endif
+
 #endif /* __CONFIG_H */
-- 
1.7.9.5

[U-Boot] [v3 06/10] stv0991: configure device tree for cadence qspi & flash

[Vikas Manocha]

This patch add the device tree entry for qspi controller & spi flash
memory.

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

Changes in v3: Rebased to spi-next-dev
Changes in v2: None

 arch/arm/dts/stv0991.dts |   34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/arch/arm/dts/stv0991.dts b/arch/arm/dts/stv0991.dts
index b25c48b..3b1efca 100644
--- a/arch/arm/dts/stv0991.dts
+++ b/arch/arm/dts/stv0991.dts
@@ -20,4 +20,38 @@
 		reg = <0x80406000 0x1000>;
 		clock = <2700000>;
 	};
+
+	aliases {
+		spi0 = "/spi at 80203000";		/* QSPI */
+	};
+
+	qspi: spi at 80203000 {
+			compatible = "cadence,qspi";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x80203000 0x100>,
+				<0x40000000 0x1000000>;
+			clocks = <3750000>;
+			ext-decoder = <0>; /* external decoder */
+			num-cs = <4>;
+			fifo-depth = <256>;
+			bus-num = <0>;
+			status = "okay";
+
+			flash0: n25q32 at 0 {
+				#address-cells = <1>;
+				#size-cells = <1>;
+				compatible = "spi-flash";
+				reg = <0>;		/* chip select */
+				spi-max-frequency = <50000000>;
+				m25p,fast-read;
+				page-size = <256>;
+				block-size = <16>; 	/* 2^16, 64KB */
+				read-delay = <4>;	/* delay value in read data capture register */
+				tshsl-ns = <50>;
+				tsd2d-ns = <50>;
+				tchsh-ns = <4>;
+				tslch-ns = <4>;
+			};
+	};
 };
-- 
1.7.9.5

[U-Boot] [v3 07/10] spi: cadence_qspi: move the sram partition in init

[Vikas Manocha]

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 v3: Rebased to spi-next-dev
Changes in v2: None

 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..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);
-- 
1.7.9.5

[U-Boot] [v3 08/10] spi: cadence_qspi: get sram size from device tree

[Vikas Manocha]

sram size could be different on different socs, e.g. on stv0991 it is 256 while
on altera platform it is 128. It is better to receive it from device tree.

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

Changes in v3: Rebased to spi-next-dev
Changes in v2: None

 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 |    6 +-----
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
index bf791c5..9b12420 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>;
+			sram-size = <128>;
 			bus-num = <2>;
 			status = "disabled";
 		};
diff --git a/arch/arm/dts/stv0991.dts b/arch/arm/dts/stv0991.dts
index 3b1efca..556df82 100644
--- a/arch/arm/dts/stv0991.dts
+++ b/arch/arm/dts/stv0991.dts
@@ -35,6 +35,7 @@
 			ext-decoder = <0>; /* external decoder */
 			num-cs = <4>;
 			fifo-depth = <256>;
+			sram-size = <256>;
 			bus-num = <0>;
 			status = "okay";
 
diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c
index a75fc46..34a0f46 100644
--- a/drivers/spi/cadence_qspi.c
+++ b/drivers/spi/cadence_qspi.c
@@ -309,6 +309,7 @@ static int cadence_spi_ofdata_to_platdata(struct udevice *bus)
 	plat->tsd2d_ns = fdtdec_get_int(blob, subnode, "tsd2d-ns", 255);
 	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);
 
 	debug("%s: regbase=%p ahbbase=%p max-frequency=%d page-size=%d\n",
 	      __func__, plat->regbase, plat->ahbbase, plat->max_hz,
diff --git a/drivers/spi/cadence_qspi.h b/drivers/spi/cadence_qspi.h
index c9a6142..98e57aa 100644
--- a/drivers/spi/cadence_qspi.h
+++ b/drivers/spi/cadence_qspi.h
@@ -25,6 +25,7 @@ struct cadence_spi_platdata {
 	u32		tsd2d_ns;
 	u32		tchsh_ns;
 	u32		tslch_ns;
+	u32		sram_size;
 };
 
 struct cadence_spi_priv {
diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c
index f2c22af..cbf0d42 100644
--- a/drivers/spi/cadence_qspi_apb.c
+++ b/drivers/spi/cadence_qspi_apb.c
@@ -36,9 +36,6 @@
 
 #define CQSPI_FIFO_WIDTH			(4)
 
-/* Controller sram size in word */
-#define CQSPI_REG_SRAM_SIZE_WORD		(128)
-#define CQSPI_REG_SRAM_PARTITION_RD		(CQSPI_REG_SRAM_SIZE_WORD/2)
 #define CQSPI_REG_SRAM_THRESHOLD_WORDS		(50)
 
 /* Transfer mode */
@@ -536,8 +533,7 @@ void cadence_qspi_apb_controller_init(struct cadence_spi_platdata *plat)
 	writel(0, plat->regbase + CQSPI_REG_REMAP);
 
 	/* Indirect mode configurations */
-	writel(CQSPI_REG_SRAM_PARTITION_RD,
-		plat->regbase + CQSPI_REG_SRAMPARTITION);
+	writel((plat->sram_size/2), plat->regbase + CQSPI_REG_SRAMPARTITION);
 
 	/* Disable all interrupts */
 	writel(0, plat->regbase + CQSPI_REG_IRQMASK);
-- 
1.7.9.5

[U-Boot] [v3 09/10] spi: cadence_qspi: support FIFO width other than 4 bytes

[Vikas Manocha]

This patch makes the code compatible with FIFO depths other than 4
bytes. It also simplify read/write FIFO loops.

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

Changes in v3: Rebased to spi-next-dev
Changes in v2: Fixed the checkpatch.pl error

 drivers/spi/cadence_qspi_apb.c |   46 ++++++++++++++++++++--------------------
 1 file changed, 23 insertions(+), 23 deletions(-)

diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c
index cbf0d42..d053407 100644
--- a/drivers/spi/cadence_qspi_apb.c
+++ b/drivers/spi/cadence_qspi_apb.c
@@ -200,18 +200,16 @@ static void cadence_qspi_apb_read_fifo_data(void *dest,
 	unsigned int *dest_ptr = (unsigned int *)dest;
 	unsigned int *src_ptr = (unsigned int *)src_ahb_addr;
 
-	while (remaining > 0) {
-		if (remaining >= CQSPI_FIFO_WIDTH) {
-			*dest_ptr = readl(src_ptr);
-			remaining -= CQSPI_FIFO_WIDTH;
-		} else {
-			/* dangling bytes */
-			temp = readl(src_ptr);
-			memcpy(dest_ptr, &temp, remaining);
-			break;
-		}
+	while (remaining >= sizeof(dest_ptr)) {
+		*dest_ptr = readl(src_ptr);
+		remaining -= sizeof(src_ptr);
 		dest_ptr++;
 	}
+	if (remaining) {
+		/* dangling bytes */
+		temp = readl(src_ptr);
+		memcpy(dest_ptr, &temp, remaining);
+	}
 
 	return;
 }
@@ -219,24 +217,26 @@ 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)
 {
-	unsigned int temp;
+	unsigned int temp = 0;
+	int i;
 	int remaining = bytes;
 	unsigned int *dest_ptr = (unsigned int *)dest_ahb_addr;
 	unsigned int *src_ptr = (unsigned int *)src;
 
-	while (remaining > 0) {
-		if (remaining >= CQSPI_FIFO_WIDTH) {
-			writel(*src_ptr, dest_ptr);
-			remaining -= sizeof(unsigned int);
-		} else {
-			/* dangling bytes */
-			memcpy(&temp, src_ptr, remaining);
-			writel(temp, dest_ptr);
-			break;
-		}
-		src_ptr++;
+	while (remaining >= CQSPI_FIFO_WIDTH) {
+		for (i = CQSPI_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;
+	}
+	if (remaining) {
+		/* dangling bytes */
+		i = remaining/sizeof(dest_ptr);
+		memcpy(&temp, src_ptr+i, remaining % sizeof(dest_ptr));
+		writel(temp, dest_ptr+i);
+		for (--i; i >= 0; i--)
+			writel(*(src_ptr+i), dest_ptr+i);
 	}
-
 	return;
 }
 
-- 
1.7.9.5

[U-Boot] [v3 10/10] spi: cadence_qspi: add device tree binding doc

[Vikas Manocha]

This patch adds the device tree binding doc for the cadence qspi controller &
also removes the not needed properties from the device trees using this
controller.

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

Changes in v3: added new

 arch/arm/dts/socfpga.dtsi                    |    3 ---
 arch/arm/dts/socfpga_cyclone5_socrates.dts   |    1 -
 arch/arm/dts/stv0991.dts                     |    4 ----
 doc/device-tree-bindings/spi/spi-cadence.txt |   28 ++++++++++++++++++++++++++
 4 files changed, 28 insertions(+), 8 deletions(-)
 create mode 100644 doc/device-tree-bindings/spi/spi-cadence.txt

diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
index 9b12420..35e6561 100644
--- a/arch/arm/dts/socfpga.dtsi
+++ b/arch/arm/dts/socfpga.dtsi
@@ -636,9 +636,6 @@
 				<0xffa00000 0x1000>;
 			interrupts = <0 151 4>;
 			clocks = <&qspi_clk>;
-			ext-decoder = <0>;  /* external decoder */
-			num-cs = <4>;
-			fifo-depth = <128>;
 			sram-size = <128>;
 			bus-num = <2>;
 			status = "disabled";
diff --git a/arch/arm/dts/socfpga_cyclone5_socrates.dts b/arch/arm/dts/socfpga_cyclone5_socrates.dts
index ea30483..557787b 100644
--- a/arch/arm/dts/socfpga_cyclone5_socrates.dts
+++ b/arch/arm/dts/socfpga_cyclone5_socrates.dts
@@ -56,7 +56,6 @@
 		m25p,fast-read;
 		page-size = <256>;
 		block-size = <16>; /* 2^16, 64KB */
-		read-delay = <4>;  /* delay value in read data capture register */
 		tshsl-ns = <50>;
 		tsd2d-ns = <50>;
 		tchsh-ns = <4>;
diff --git a/arch/arm/dts/stv0991.dts b/arch/arm/dts/stv0991.dts
index 556df82..601148e 100644
--- a/arch/arm/dts/stv0991.dts
+++ b/arch/arm/dts/stv0991.dts
@@ -32,9 +32,6 @@
 			reg = <0x80203000 0x100>,
 				<0x40000000 0x1000000>;
 			clocks = <3750000>;
-			ext-decoder = <0>; /* external decoder */
-			num-cs = <4>;
-			fifo-depth = <256>;
 			sram-size = <256>;
 			bus-num = <0>;
 			status = "okay";
@@ -48,7 +45,6 @@
 				m25p,fast-read;
 				page-size = <256>;
 				block-size = <16>; 	/* 2^16, 64KB */
-				read-delay = <4>;	/* delay value in read data capture register */
 				tshsl-ns = <50>;
 				tsd2d-ns = <50>;
 				tchsh-ns = <4>;
diff --git a/doc/device-tree-bindings/spi/spi-cadence.txt b/doc/device-tree-bindings/spi/spi-cadence.txt
new file mode 100644
index 0000000..c1e2233
--- /dev/null
+++ b/doc/device-tree-bindings/spi/spi-cadence.txt
@@ -0,0 +1,28 @@
+Cadence QSPI controller device tree bindings
+--------------------------------------------
+
+Required properties:
+- compatible		: should be "cadence,qspi".
+- reg			: 1.Physical base address and size of SPI registers map.
+			  2. Physical base address & size of NOR Flash.
+- clocks		: Clock phandles (see clock bindings for details).
+- sram-size		: spi controller sram size.
+- status		: enable in requried dts.
+
+connected flash properties
+--------------------------
+
+- spi-max-frequency	: Max supported spi frequency.
+- page-size		: Flash page size.
+- block-size		: Flash memory block size.
+- tshsl-ns		: Added delay in master reference clocks (ref_clk) for
+			  the length that the master mode chip select outputs
+			  are de-asserted between transactions.
+- tsd2d-ns		: Delay in master reference clocks (ref_clk) between one
+			  chip select being de-activated and the activation of
+			  another.
+- tchsh-ns		: Delay in master reference clocks between last bit of
+			  current transaction and de-asserting the device chip
+			  select (n_ss_out).
+- tslch-ns		: Delay in master reference clocks between setting
+			  n_ss_out low and first bit transfer
-- 
1.7.9.5

[U-Boot] [v3 08/10] spi: cadence_qspi: get sram size from device tree

[Jagan Teki]

On 30 June 2015 at 02:19, Vikas Manocha <vikas.manocha@st.com> wrote:
> sram size could be different on different socs, e.g. on stv0991 it is 256 while
> on altera platform it is 128. It is better to receive it from device tree.
>
> Signed-off-by: Vikas Manocha <vikas.manocha@st.com>

Still have an issue - unable to apply.

> Tested-by: Stefan Roese <sr@denx.de>
> ---
>
> Changes in v3: Rebased to spi-next-dev
> Changes in v2: None
>
>  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 |    6 +-----
>  5 files changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
> index bf791c5..9b12420 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>;
> +                       sram-size = <128>;
>                         bus-num = <2>;
>                         status = "disabled";
>                 };
> diff --git a/arch/arm/dts/stv0991.dts b/arch/arm/dts/stv0991.dts
> index 3b1efca..556df82 100644
> --- a/arch/arm/dts/stv0991.dts
> +++ b/arch/arm/dts/stv0991.dts
> @@ -35,6 +35,7 @@
>                         ext-decoder = <0>; /* external decoder */
>                         num-cs = <4>;
>                         fifo-depth = <256>;
> +                       sram-size = <256>;
>                         bus-num = <0>;
>                         status = "okay";
>
> diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c
> index a75fc46..34a0f46 100644
> --- a/drivers/spi/cadence_qspi.c
> +++ b/drivers/spi/cadence_qspi.c
> @@ -309,6 +309,7 @@ static int cadence_spi_ofdata_to_platdata(struct udevice *bus)
>         plat->tsd2d_ns = fdtdec_get_int(blob, subnode, "tsd2d-ns", 255);
>         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);
>
>         debug("%s: regbase=%p ahbbase=%p max-frequency=%d page-size=%d\n",
>               __func__, plat->regbase, plat->ahbbase, plat->max_hz,
> diff --git a/drivers/spi/cadence_qspi.h b/drivers/spi/cadence_qspi.h
> index c9a6142..98e57aa 100644
> --- a/drivers/spi/cadence_qspi.h
> +++ b/drivers/spi/cadence_qspi.h
> @@ -25,6 +25,7 @@ struct cadence_spi_platdata {
>         u32             tsd2d_ns;
>         u32             tchsh_ns;
>         u32             tslch_ns;
> +       u32             sram_size;
>  };
>
>  struct cadence_spi_priv {
> diff --git a/drivers/spi/cadence_qspi_apb.c b/drivers/spi/cadence_qspi_apb.c
> index f2c22af..cbf0d42 100644
> --- a/drivers/spi/cadence_qspi_apb.c
> +++ b/drivers/spi/cadence_qspi_apb.c
> @@ -36,9 +36,6 @@
>
>  #define CQSPI_FIFO_WIDTH                       (4)
>
> -/* Controller sram size in word */
> -#define CQSPI_REG_SRAM_SIZE_WORD               (128)
> -#define CQSPI_REG_SRAM_PARTITION_RD            (CQSPI_REG_SRAM_SIZE_WORD/2)
>  #define CQSPI_REG_SRAM_THRESHOLD_WORDS         (50)
>
>  /* Transfer mode */
> @@ -536,8 +533,7 @@ void cadence_qspi_apb_controller_init(struct cadence_spi_platdata *plat)
>         writel(0, plat->regbase + CQSPI_REG_REMAP);
>
>         /* Indirect mode configurations */
> -       writel(CQSPI_REG_SRAM_PARTITION_RD,
> -               plat->regbase + CQSPI_REG_SRAMPARTITION);
> +       writel((plat->sram_size/2), plat->regbase + CQSPI_REG_SRAMPARTITION);
>
>         /* Disable all interrupts */
>         writel(0, plat->regbase + CQSPI_REG_IRQMASK);
> --
> 1.7.9.5

thanks!
-- 
Jagan | openedev.

[U-Boot] [v3 10/10] spi: cadence_qspi: add device tree binding doc

[Jagan Teki]

On 30 June 2015 at 02:19, Vikas Manocha <vikas.manocha@st.com> wrote:
> This patch adds the device tree binding doc for the cadence qspi controller &
> also removes the not needed properties from the device trees using this
> controller.
>
> Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
> ---
>
> Changes in v3: added new
>
>  arch/arm/dts/socfpga.dtsi                    |    3 ---
>  arch/arm/dts/socfpga_cyclone5_socrates.dts   |    1 -
>  arch/arm/dts/stv0991.dts                     |    4 ----
>  doc/device-tree-bindings/spi/spi-cadence.txt |   28 ++++++++++++++++++++++++++
>  4 files changed, 28 insertions(+), 8 deletions(-)
>  create mode 100644 doc/device-tree-bindings/spi/spi-cadence.txt
>
> diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
> index 9b12420..35e6561 100644
> --- a/arch/arm/dts/socfpga.dtsi
> +++ b/arch/arm/dts/socfpga.dtsi
> @@ -636,9 +636,6 @@
>                                 <0xffa00000 0x1000>;
>                         interrupts = <0 151 4>;
>                         clocks = <&qspi_clk>;
> -                       ext-decoder = <0>;  /* external decoder */
> -                       num-cs = <4>;
> -                       fifo-depth = <128>;
>                         sram-size = <128>;
>                         bus-num = <2>;
>                         status = "disabled";
> diff --git a/arch/arm/dts/socfpga_cyclone5_socrates.dts b/arch/arm/dts/socfpga_cyclone5_socrates.dts
> index ea30483..557787b 100644
> --- a/arch/arm/dts/socfpga_cyclone5_socrates.dts
> +++ b/arch/arm/dts/socfpga_cyclone5_socrates.dts
> @@ -56,7 +56,6 @@
>                 m25p,fast-read;
>                 page-size = <256>;
>                 block-size = <16>; /* 2^16, 64KB */
> -               read-delay = <4>;  /* delay value in read data capture register */
>                 tshsl-ns = <50>;
>                 tsd2d-ns = <50>;
>                 tchsh-ns = <4>;
> diff --git a/arch/arm/dts/stv0991.dts b/arch/arm/dts/stv0991.dts
> index 556df82..601148e 100644
> --- a/arch/arm/dts/stv0991.dts
> +++ b/arch/arm/dts/stv0991.dts
> @@ -32,9 +32,6 @@
>                         reg = <0x80203000 0x100>,
>                                 <0x40000000 0x1000000>;
>                         clocks = <3750000>;
> -                       ext-decoder = <0>; /* external decoder */
> -                       num-cs = <4>;
> -                       fifo-depth = <256>;
>                         sram-size = <256>;
>                         bus-num = <0>;
>                         status = "okay";
> @@ -48,7 +45,6 @@
>                                 m25p,fast-read;
>                                 page-size = <256>;
>                                 block-size = <16>;      /* 2^16, 64KB */
> -                               read-delay = <4>;       /* delay value in read data capture register */
>                                 tshsl-ns = <50>;
>                                 tsd2d-ns = <50>;
>                                 tchsh-ns = <4>;
> diff --git a/doc/device-tree-bindings/spi/spi-cadence.txt b/doc/device-tree-bindings/spi/spi-cadence.txt
> new file mode 100644
> index 0000000..c1e2233
> --- /dev/null
> +++ b/doc/device-tree-bindings/spi/spi-cadence.txt
> @@ -0,0 +1,28 @@
> +Cadence QSPI controller device tree bindings
> +--------------------------------------------
> +
> +Required properties:
> +- compatible           : should be "cadence,qspi".
> +- reg                  : 1.Physical base address and size of SPI registers map.
> +                         2. Physical base address & size of NOR Flash.
> +- clocks               : Clock phandles (see clock bindings for details).
> +- sram-size            : spi controller sram size.

? bus-num

> +- status               : enable in requried dts.
> +
> +connected flash properties
> +--------------------------
> +
> +- spi-max-frequency    : Max supported spi frequency.
> +- page-size            : Flash page size.
> +- block-size           : Flash memory block size.
> +- tshsl-ns             : Added delay in master reference clocks (ref_clk) for
> +                         the length that the master mode chip select outputs
> +                         are de-asserted between transactions.
> +- tsd2d-ns             : Delay in master reference clocks (ref_clk) between one
> +                         chip select being de-activated and the activation of
> +                         another.
> +- tchsh-ns             : Delay in master reference clocks between last bit of
> +                         current transaction and de-asserting the device chip
> +                         select (n_ss_out).
> +- tslch-ns             : Delay in master reference clocks between setting
> +                         n_ss_out low and first bit transfer
> --

thanks!
-- 
Jagan | openedev.

[U-Boot] [v3 10/10] spi: cadence_qspi: add device tree binding doc

[Vikas MANOCHA]

Thanks Jagan,

> -----Original Message-----
> From: Jagan Teki [mailto:jteki at openedev.com]
> Sent: Monday, June 29, 2015 11:29 PM
> To: Vikas MANOCHA
> Cc: u-boot at lists.denx.de; Stefan Roese
> Subject: Re: [U-Boot] [v3 10/10] spi: cadence_qspi: add device tree binding
> doc
> 
> On 30 June 2015 at 02:19, Vikas Manocha <vikas.manocha@st.com> wrote:
> > This patch adds the device tree binding doc for the cadence qspi
> > controller & also removes the not needed properties from the device
> > trees using this controller.
> >
> > Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
> > ---
> >
> > Changes in v3: added new
> >
> >  arch/arm/dts/socfpga.dtsi                    |    3 ---
> >  arch/arm/dts/socfpga_cyclone5_socrates.dts   |    1 -
> >  arch/arm/dts/stv0991.dts                     |    4 ----
> >  doc/device-tree-bindings/spi/spi-cadence.txt |   28
> ++++++++++++++++++++++++++
> >  4 files changed, 28 insertions(+), 8 deletions(-)  create mode 100644
> > doc/device-tree-bindings/spi/spi-cadence.txt
> >
> > diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi
> > index 9b12420..35e6561 100644
> > --- a/arch/arm/dts/socfpga.dtsi
> > +++ b/arch/arm/dts/socfpga.dtsi
> > @@ -636,9 +636,6 @@
> >                                 <0xffa00000 0x1000>;
> >                         interrupts = <0 151 4>;
> >                         clocks = <&qspi_clk>;
> > -                       ext-decoder = <0>;  /* external decoder */
> > -                       num-cs = <4>;
> > -                       fifo-depth = <128>;
> >                         sram-size = <128>;
> >                         bus-num = <2>;
> >                         status = "disabled"; diff --git
> > a/arch/arm/dts/socfpga_cyclone5_socrates.dts
> > b/arch/arm/dts/socfpga_cyclone5_socrates.dts
> > index ea30483..557787b 100644
> > --- a/arch/arm/dts/socfpga_cyclone5_socrates.dts
> > +++ b/arch/arm/dts/socfpga_cyclone5_socrates.dts
> > @@ -56,7 +56,6 @@
> >                 m25p,fast-read;
> >                 page-size = <256>;
> >                 block-size = <16>; /* 2^16, 64KB */
> > -               read-delay = <4>;  /* delay value in read data capture register */
> >                 tshsl-ns = <50>;
> >                 tsd2d-ns = <50>;
> >                 tchsh-ns = <4>;
> > diff --git a/arch/arm/dts/stv0991.dts b/arch/arm/dts/stv0991.dts index
> > 556df82..601148e 100644
> > --- a/arch/arm/dts/stv0991.dts
> > +++ b/arch/arm/dts/stv0991.dts
> > @@ -32,9 +32,6 @@
> >                         reg = <0x80203000 0x100>,
> >                                 <0x40000000 0x1000000>;
> >                         clocks = <3750000>;
> > -                       ext-decoder = <0>; /* external decoder */
> > -                       num-cs = <4>;
> > -                       fifo-depth = <256>;
> >                         sram-size = <256>;
> >                         bus-num = <0>;
> >                         status = "okay"; @@ -48,7 +45,6 @@
> >                                 m25p,fast-read;
> >                                 page-size = <256>;
> >                                 block-size = <16>;      /* 2^16, 64KB */
> > -                               read-delay = <4>;       /* delay value in read data capture
> register */
> >                                 tshsl-ns = <50>;
> >                                 tsd2d-ns = <50>;
> >                                 tchsh-ns = <4>; diff --git
> > a/doc/device-tree-bindings/spi/spi-cadence.txt
> > b/doc/device-tree-bindings/spi/spi-cadence.txt
> > new file mode 100644
> > index 0000000..c1e2233
> > --- /dev/null
> > +++ b/doc/device-tree-bindings/spi/spi-cadence.txt
> > @@ -0,0 +1,28 @@
> > +Cadence QSPI controller device tree bindings
> > +--------------------------------------------
> > +
> > +Required properties:
> > +- compatible           : should be "cadence,qspi".
> > +- reg                  : 1.Physical base address and size of SPI registers map.
> > +                         2. Physical base address & size of NOR Flash.
> > +- clocks               : Clock phandles (see clock bindings for details).
> > +- sram-size            : spi controller sram size.
> 
> ? bus-num

It is not being used in the cadence_qspi driver but used on socfpga arch to distinguish between different spi peripherals.

Stefan,
Can you please comment about it. It is ok to remove it from "arch/arm/dts/socfpga.dtsi"

Rgds,
Vikas

> 
> > +- status               : enable in requried dts.
> > +
> > +connected flash properties
> > +--------------------------
> > +
> > +- spi-max-frequency    : Max supported spi frequency.
> > +- page-size            : Flash page size.
> > +- block-size           : Flash memory block size.
> > +- tshsl-ns             : Added delay in master reference clocks (ref_clk) for
> > +                         the length that the master mode chip select outputs
> > +                         are de-asserted between transactions.
> > +- tsd2d-ns             : Delay in master reference clocks (ref_clk) between one
> > +                         chip select being de-activated and the activation of
> > +                         another.
> > +- tchsh-ns             : Delay in master reference clocks between last bit of
> > +                         current transaction and de-asserting the device chip
> > +                         select (n_ss_out).
> > +- tslch-ns             : Delay in master reference clocks between setting
> > +                         n_ss_out low and first bit transfer
> > --
> 
> thanks!
> --
> Jagan | openedev.

[U-Boot] [v3 10/10] spi: cadence_qspi: add device tree binding doc

[Stefan Roese]

Hi Vikas,

On 01.07.2015 00:57, Vikas MANOCHA wrote:
>>> +Cadence QSPI controller device tree bindings
>>> +--------------------------------------------
>>> +
>>> +Required properties:
>>> +- compatible           : should be "cadence,qspi".
>>> +- reg                  : 1.Physical base address and size of SPI registers map.
>>> +                         2. Physical base address & size of NOR Flash.
>>> +- clocks               : Clock phandles (see clock bindings for details).
>>> +- sram-size            : spi controller sram size.
>>
>> ? bus-num
>
> It is not being used in the cadence_qspi driver but used on socfpga
> arch to distinguish between different spi peripherals.
>
> Stefan,
> Can you please comment about it. It is ok to remove it from
> "arch/arm/dts/socfpga.dtsi"

Not sure. Why do we need to remove it? I would prefer to keep it as its 
know to work this way.

BTW: We need to re-sync with the Linux Cadence QSPI NOR driver at some 
time. At least in regard to the device-tree properties. The driver has 
been posted for quite some time now. And I hope it will be accepted 
soon. And as you can see from [1] the bindings / properties differ a bit 
from our currently used ones. So once this driver is accepted in 
kernel.org, we need to re-sync the bindings / dts files again.

Thanks,
Stefan

[1] http://permalink.gmane.org/gmane.linux.drivers.mtd/58159

[U-Boot] [v3 10/10] spi: cadence_qspi: add device tree binding doc

[Vikas MANOCHA]

Hi Jagan,

> -----Original Message-----
> From: Stefan Roese [mailto:sr at denx.de]
> Sent: Thursday, July 02, 2015 3:12 AM
> To: Vikas MANOCHA; Jagan Teki
> Cc: u-boot at lists.denx.de
> Subject: Re: [U-Boot] [v3 10/10] spi: cadence_qspi: add device tree binding
> doc
> 
> Hi Vikas,
> 
> On 01.07.2015 00:57, Vikas MANOCHA wrote:
> >>> +Cadence QSPI controller device tree bindings
> >>> +--------------------------------------------
> >>> +
> >>> +Required properties:
> >>> +- compatible           : should be "cadence,qspi".
> >>> +- reg                  : 1.Physical base address and size of SPI registers map.
> >>> +                         2. Physical base address & size of NOR Flash.
> >>> +- clocks               : Clock phandles (see clock bindings for details).
> >>> +- sram-size            : spi controller sram size.
> >>
> >> ? bus-num
> >
> > It is not being used in the cadence_qspi driver but used on socfpga
> > arch to distinguish between different spi peripherals.
> >
> > Stefan,
> > Can you please comment about it. It is ok to remove it from
> > "arch/arm/dts/socfpga.dtsi"
> 
> Not sure. Why do we need to remove it? I would prefer to keep it as its know
> to work this way.
> 
> BTW: We need to re-sync with the Linux Cadence QSPI NOR driver at some
> time. At least in regard to the device-tree properties. The driver has been
> posted for quite some time now. And I hope it will be accepted soon. And as
> you can see from [1] the bindings / properties differ a bit from our currently
> used ones. So once this driver is accepted in kernel.org, we need to re-sync
> the bindings / dts files again.

Jagan, do you agree not to remove it ?

Rgds,
Vikas

> 
> Thanks,
> Stefan
> 
> [1] http://permalink.gmane.org/gmane.linux.drivers.mtd/58159

[U-Boot] [v3 10/10] spi: cadence_qspi: add device tree binding doc

[Jagan Teki]

On 2 July 2015 at 23:12, Vikas MANOCHA <vikas.manocha@st.com> wrote:
> Hi Jagan,
>
>> -----Original Message-----
>> From: Stefan Roese [mailto:sr at denx.de]
>> Sent: Thursday, July 02, 2015 3:12 AM
>> To: Vikas MANOCHA; Jagan Teki
>> Cc: u-boot at lists.denx.de
>> Subject: Re: [U-Boot] [v3 10/10] spi: cadence_qspi: add device tree binding
>> doc
>>
>> Hi Vikas,
>>
>> On 01.07.2015 00:57, Vikas MANOCHA wrote:
>> >>> +Cadence QSPI controller device tree bindings
>> >>> +--------------------------------------------
>> >>> +
>> >>> +Required properties:
>> >>> +- compatible           : should be "cadence,qspi".
>> >>> +- reg                  : 1.Physical base address and size of SPI registers map.
>> >>> +                         2. Physical base address & size of NOR Flash.
>> >>> +- clocks               : Clock phandles (see clock bindings for details).
>> >>> +- sram-size            : spi controller sram size.
>> >>
>> >> ? bus-num
>> >
>> > It is not being used in the cadence_qspi driver but used on socfpga
>> > arch to distinguish between different spi peripherals.
>> >
>> > Stefan,
>> > Can you please comment about it. It is ok to remove it from
>> > "arch/arm/dts/socfpga.dtsi"
>>
>> Not sure. Why do we need to remove it? I would prefer to keep it as its know
>> to work this way.
>>
>> BTW: We need to re-sync with the Linux Cadence QSPI NOR driver at some
>> time. At least in regard to the device-tree properties. The driver has been
>> posted for quite some time now. And I hope it will be accepted soon. And as
>> you can see from [1] the bindings / properties differ a bit from our currently
>> used ones. So once this driver is accepted in kernel.org, we need to re-sync
>> the bindings / dts files again.
>
> Jagan, do you agree not to remove it ?

Yes, but one think you can do is just add what ever nodes required on your dts
and document the same - don't touch dtsi.

thanks!
-- 
Jagan | openedev.

[U-Boot] [v3 10/10] spi: cadence_qspi: add device tree binding doc

[Vikas MANOCHA]

Thanks Jagan,

> -----Original Message-----
> From: Jagan Teki [mailto:jteki at openedev.com]
> Sent: Thursday, July 02, 2015 10:49 AM
> To: Vikas MANOCHA
> Cc: Stefan Roese; u-boot at lists.denx.de
> Subject: Re: [U-Boot] [v3 10/10] spi: cadence_qspi: add device tree binding
> doc
> 
> On 2 July 2015 at 23:12, Vikas MANOCHA <vikas.manocha@st.com> wrote:
> > Hi Jagan,
> >
> >> -----Original Message-----
> >> From: Stefan Roese [mailto:sr at denx.de]
> >> Sent: Thursday, July 02, 2015 3:12 AM
> >> To: Vikas MANOCHA; Jagan Teki
> >> Cc: u-boot at lists.denx.de
> >> Subject: Re: [U-Boot] [v3 10/10] spi: cadence_qspi: add device tree
> >> binding doc
> >>
> >> Hi Vikas,
> >>
> >> On 01.07.2015 00:57, Vikas MANOCHA wrote:
> >> >>> +Cadence QSPI controller device tree bindings
> >> >>> +--------------------------------------------
> >> >>> +
> >> >>> +Required properties:
> >> >>> +- compatible           : should be "cadence,qspi".
> >> >>> +- reg                  : 1.Physical base address and size of SPI registers map.
> >> >>> +                         2. Physical base address & size of NOR Flash.
> >> >>> +- clocks               : Clock phandles (see clock bindings for details).
> >> >>> +- sram-size            : spi controller sram size.
> >> >>
> >> >> ? bus-num
> >> >
> >> > It is not being used in the cadence_qspi driver but used on socfpga
> >> > arch to distinguish between different spi peripherals.
> >> >
> >> > Stefan,
> >> > Can you please comment about it. It is ok to remove it from
> >> > "arch/arm/dts/socfpga.dtsi"
> >>
> >> Not sure. Why do we need to remove it? I would prefer to keep it as
> >> its know to work this way.
> >>
> >> BTW: We need to re-sync with the Linux Cadence QSPI NOR driver at
> >> some time. At least in regard to the device-tree properties. The
> >> driver has been posted for quite some time now. And I hope it will be
> >> accepted soon. And as you can see from [1] the bindings / properties
> >> differ a bit from our currently used ones. So once this driver is
> >> accepted in kernel.org, we need to re-sync the bindings / dts files again.
> >
> > Jagan, do you agree not to remove it ?
> 
> Yes, but one think you can do is just add what ever nodes required on your
> dts and document the same - don't touch dtsi.

Makes sense, will do it.

Rgds,
Vikas

> 
> thanks!
> --
> Jagan | openedev.