From d1d81802522ade84128a2c66c0d500e372474dca Mon Sep 17 00:00:00 2001 From: Torsten Fleischer Date: Mon, 3 Nov 2014 17:17:55 +0100 Subject: spi: spi-gpio: Add dt support for a single device with no chip select In order to describe a single slave device that has no chip select line the 'num-chipselects' property has to be <0> and the 'cs-gpios' property doesn't need to be set. Signed-off-by: Torsten Fleischer Signed-off-by: Mark Brown --- Documentation/devicetree/bindings/spi/spi-gpio.txt | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/spi/spi-gpio.txt b/Documentation/devicetree/bindings/spi/spi-gpio.txt index 8a824be15754..a95603bcf6ff 100644 --- a/Documentation/devicetree/bindings/spi/spi-gpio.txt +++ b/Documentation/devicetree/bindings/spi/spi-gpio.txt @@ -8,8 +8,10 @@ Required properties: - gpio-sck: GPIO spec for the SCK line to use - gpio-miso: GPIO spec for the MISO line to use - gpio-mosi: GPIO spec for the MOSI line to use - - cs-gpios: GPIOs to use for chipselect lines - - num-chipselects: number of chipselect lines + - cs-gpios: GPIOs to use for chipselect lines. + Not needed if num-chipselects = <0>. + - num-chipselects: Number of chipselect lines. Should be <0> if a single device + with no chip select is connected. Example: -- cgit v1.2.3 From 07a186893af5a274877d11ce9e5d81c142890cf6 Mon Sep 17 00:00:00 2001 From: Andrew Bresticker Date: Fri, 14 Nov 2014 10:48:31 -0800 Subject: spi: Add binding document for IMG SPFI controller The Synchronous Peripheral Flash Interface (SPFI) controller found on IMG SoCs supports single, dual, and (optionally) quad mode SPI transfers. Signed-off-by: Andrew Bresticker Signed-off-by: Mark Brown --- .../devicetree/bindings/spi/spi-img-spfi.txt | 37 ++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/spi-img-spfi.txt (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/spi/spi-img-spfi.txt b/Documentation/devicetree/bindings/spi/spi-img-spfi.txt new file mode 100644 index 000000000000..c7dd50fb8eb2 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/spi-img-spfi.txt @@ -0,0 +1,37 @@ +IMG Synchronous Peripheral Flash Interface (SPFI) controller + +Required properties: +- compatible: Must be "img,spfi". +- reg: Must contain the base address and length of the SPFI registers. +- interrupts: Must contain the SPFI interrupt. +- clocks: Must contain an entry for each entry in clock-names. + See ../clock/clock-bindings.txt for details. +- clock-names: Must include the following entries: + - spfi: SPI operating clock + - sys: SPI system interface clock +- dmas: Must contain an entry for each entry in dma-names. + See ../dma/dma.txt for details. +- dma-names: Must include the following entries: + - rx + - tx +- #address-cells: Must be 1. +- #size-cells: Must be 0. + +Optional properties: +- img,supports-quad-mode: Should be set if the interface supports quad mode + SPI transfers. + +Example: + +spi@18100f00 { + compatible = "img,spfi"; + reg = <0x18100f00 0x100>; + interrupts = ; + clocks = <&spi_clk>, <&system_clk>; + clock-names = "spfi", "sys"; + dmas = <&mdc 9 0xffffffff 0>, <&mdc 10 0xffffffff 0>; + dma-names = "rx", "tx"; + + #address-cells = <1>; + #size-cells = <0>; +}; -- cgit v1.2.3 From 56da2aafe0a6db710c38a2fbf6aa9352a7b9fa4d Mon Sep 17 00:00:00 2001 From: Beniamino Galvani Date: Sat, 22 Nov 2014 16:21:40 +0100 Subject: spi: meson: Add device tree bindings documentation for SPIFC This adds documentation of device tree bindings for the Amlogic Meson SPIFC (SPI Flash Controller). Signed-off-by: Beniamino Galvani Signed-off-by: Mark Brown --- .../devicetree/bindings/spi/spi-meson.txt | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/spi-meson.txt (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/spi/spi-meson.txt b/Documentation/devicetree/bindings/spi/spi-meson.txt new file mode 100644 index 000000000000..bb52a86f3365 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/spi-meson.txt @@ -0,0 +1,22 @@ +Amlogic Meson SPI controllers + +* SPIFC (SPI Flash Controller) + +The Meson SPIFC is a controller optimized for communication with SPI +NOR memories, without DMA support and a 64-byte unified transmit / +receive buffer. + +Required properties: + - compatible: should be "amlogic,meson6-spifc" + - reg: physical base address and length of the controller registers + - clocks: phandle of the input clock for the baud rate generator + - #address-cells: should be 1 + - #size-cells: should be 0 + + spi@c1108c80 { + compatible = "amlogic,meson6-spifc"; + reg = <0xc1108c80 0x80>; + clocks = <&clk81>; + #address-cells = <1>; + #size-cells = <0>; + }; -- cgit v1.2.3 From bf77cba95f8c06bbf76869d3bdfb03e18a33e673 Mon Sep 17 00:00:00 2001 From: Padmavathi Venna Date: Thu, 6 Nov 2014 15:21:49 +0530 Subject: spi: s3c64xx: add support for exynos7 SPI controller Exynos7 SPI controller supports only the auto Selection of CS toggle mode and Exynos7 SoC includes six SPI controllers. Add support for these changes in Exynos7 SPI controller driver. Signed-off-by: Padmavathi Venna Signed-off-by: Mark Brown --- .../devicetree/bindings/spi/spi-samsung.txt | 2 +- drivers/spi/Kconfig | 2 +- drivers/spi/spi-s3c64xx.c | 32 ++++++++++++++++++---- 3 files changed, 29 insertions(+), 7 deletions(-) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/spi/spi-samsung.txt b/Documentation/devicetree/bindings/spi/spi-samsung.txt index 1e8a8578148f..6dbdeb3c361a 100644 --- a/Documentation/devicetree/bindings/spi/spi-samsung.txt +++ b/Documentation/devicetree/bindings/spi/spi-samsung.txt @@ -9,7 +9,7 @@ Required SoC Specific Properties: - samsung,s3c2443-spi: for s3c2443, s3c2416 and s3c2450 platforms - samsung,s3c6410-spi: for s3c6410 platforms - samsung,s5pv210-spi: for s5pv210 and s5pc110 platforms - - samsung,exynos4210-spi: for exynos4 and exynos5 platforms + - samsung,exynos7-spi: for exynos7 platforms - reg: physical base address of the controller and length of memory mapped region. diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 84e7c9e6ccef..de2d33dea8b8 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -444,7 +444,7 @@ config SPI_S3C24XX_FIQ config SPI_S3C64XX tristate "Samsung S3C64XX series type SPI" - depends on PLAT_SAMSUNG + depends on (PLAT_SAMSUNG || ARCH_EXYNOS) select S3C64XX_PL080 if ARCH_S3C64XX help SPI driver for Samsung S3C64XX and newer SoCs. diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 480133ee1eb3..59e07cf31598 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -33,8 +33,9 @@ #include -#define MAX_SPI_PORTS 3 +#define MAX_SPI_PORTS 6 #define S3C64XX_SPI_QUIRK_POLL (1 << 0) +#define S3C64XX_SPI_QUIRK_CS_AUTO (1 << 1) /* Registers and bit-fields */ @@ -78,6 +79,7 @@ #define S3C64XX_SPI_SLAVE_AUTO (1<<1) #define S3C64XX_SPI_SLAVE_SIG_INACT (1<<0) +#define S3C64XX_SPI_SLAVE_NSC_CNT_2 (2<<4) #define S3C64XX_SPI_INT_TRAILING_EN (1<<6) #define S3C64XX_SPI_INT_RX_OVERRUN_EN (1<<5) @@ -717,7 +719,12 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master, enable_datapath(sdd, spi, xfer, use_dma); /* Start the signals */ - writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL); + if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) + writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL); + else + writel(readl(sdd->regs + S3C64XX_SPI_SLAVE_SEL) + | S3C64XX_SPI_SLAVE_AUTO | S3C64XX_SPI_SLAVE_NSC_CNT_2, + sdd->regs + S3C64XX_SPI_SLAVE_SEL); spin_unlock_irqrestore(&sdd->lock, flags); @@ -866,13 +873,15 @@ static int s3c64xx_spi_setup(struct spi_device *spi) } pm_runtime_put(&sdd->pdev->dev); - writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL); + if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) + writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL); return 0; setup_exit: pm_runtime_put(&sdd->pdev->dev); /* setup() returns with device de-selected */ - writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL); + if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) + writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL); if (gpio_is_valid(spi->cs_gpio)) gpio_free(spi->cs_gpio); @@ -946,7 +955,8 @@ static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd, int channel) sdd->cur_speed = 0; - writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL); + if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) + writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL); /* Disable Interrupts - we use Polling if not DMA mode */ writel(0, regs + S3C64XX_SPI_INT_EN); @@ -1341,6 +1351,15 @@ static struct s3c64xx_spi_port_config exynos5440_spi_port_config = { .quirks = S3C64XX_SPI_QUIRK_POLL, }; +static struct s3c64xx_spi_port_config exynos7_spi_port_config = { + .fifo_lvl_mask = { 0x1ff, 0x7F, 0x7F, 0x7F, 0x7F, 0x1ff}, + .rx_lvl_offset = 15, + .tx_st_done = 25, + .high_speed = true, + .clk_from_cmu = true, + .quirks = S3C64XX_SPI_QUIRK_CS_AUTO, +}; + static struct platform_device_id s3c64xx_spi_driver_ids[] = { { .name = "s3c2443-spi", @@ -1374,6 +1393,9 @@ static const struct of_device_id s3c64xx_spi_dt_match[] = { { .compatible = "samsung,exynos5440-spi", .data = (void *)&exynos5440_spi_port_config, }, + { .compatible = "samsung,exynos7-spi", + .data = (void *)&exynos7_spi_port_config, + }, { }, }; MODULE_DEVICE_TABLE(of, s3c64xx_spi_dt_match); -- cgit v1.2.3