Add atmel-ssc for device tree support Match "atmel,at91rm9200-ssc" for using pdc for data transfer Match "atmel,at91sam9g45-ssc" for using pdc for data transfer
Signed-off-by: Bo Shen <[email protected]> Acked-by: Nicolas Ferre <[email protected]> --- Change since v2 No change Change since v1 change the underscore to dash in atmel-ssc binding document --- .../devicetree/bindings/misc/atmel-ssc.txt | 15 ++++++ arch/arm/boot/dts/at91sam9260.dtsi | 8 ++++ arch/arm/boot/dts/at91sam9263.dtsi | 16 +++++++ arch/arm/boot/dts/at91sam9g45.dtsi | 16 +++++++ arch/arm/boot/dts/at91sam9x5.dtsi | 8 ++++ arch/arm/mach-at91/at91rm9200.c | 3 ++ arch/arm/mach-at91/at91sam9260.c | 1 + arch/arm/mach-at91/at91sam9261.c | 3 ++ arch/arm/mach-at91/at91sam9263.c | 2 + arch/arm/mach-at91/at91sam9g45.c | 2 + arch/arm/mach-at91/at91sam9rl.c | 2 + arch/arm/mach-at91/at91sam9x5.c | 1 + drivers/misc/atmel-ssc.c | 49 ++++++++++++++++++-- 13 files changed, 123 insertions(+), 3 deletions(-) create mode 100644 Documentation/devicetree/bindings/misc/atmel-ssc.txt diff --git a/Documentation/devicetree/bindings/misc/atmel-ssc.txt b/Documentation/devicetree/bindings/misc/atmel-ssc.txt new file mode 100644 index 0000000..38e51ad --- /dev/null +++ b/Documentation/devicetree/bindings/misc/atmel-ssc.txt @@ -0,0 +1,15 @@ +* Atmel SSC driver. + +Required properties: +- compatible: "atmel,at91rm9200-ssc" or "atmel,at91sam9g45-ssc" + - atmel,at91rm9200-ssc: support pdc transfer + - atmel,at91sam9g45-ssc: support dma transfer +- reg: Should contain SSC registers location and length +- interrupts: Should contain SSC interrupt + +Example: +ssc0: ssc@fffbc000 { + compatible = "atmel,at91rm9200-ssc"; + reg = <0xfffbc000 0x4000>; + interrupts = <14 4 5>; +}; diff --git a/arch/arm/boot/dts/at91sam9260.dtsi b/arch/arm/boot/dts/at91sam9260.dtsi index d410581..aaa42d8 100644 --- a/arch/arm/boot/dts/at91sam9260.dtsi +++ b/arch/arm/boot/dts/at91sam9260.dtsi @@ -29,6 +29,7 @@ tcb0 = &tcb0; tcb1 = &tcb1; i2c0 = &i2c0; + ssc0 = &ssc0; }; cpus { cpu@0 { @@ -212,6 +213,13 @@ status = "disabled"; }; + ssc0: ssc@fffbc000 { + compatible = "atmel,at91rm9200-ssc"; + reg = <0xfffbc000 0x4000>; + interrupts = <14 4 5>; + status = "disable"; + }; + adc0: adc@fffe0000 { compatible = "atmel,at91sam9260-adc"; reg = <0xfffe0000 0x100>; diff --git a/arch/arm/boot/dts/at91sam9263.dtsi b/arch/arm/boot/dts/at91sam9263.dtsi index 3e6e5c1..3b721ee 100644 --- a/arch/arm/boot/dts/at91sam9263.dtsi +++ b/arch/arm/boot/dts/at91sam9263.dtsi @@ -25,6 +25,8 @@ gpio4 = &pioE; tcb0 = &tcb0; i2c0 = &i2c0; + ssc0 = &ssc0; + ssc1 = &ssc1; }; cpus { cpu@0 { @@ -173,6 +175,20 @@ status = "disabled"; }; + ssc0: ssc@fff98000 { + compatible = "atmel,at91rm9200-ssc"; + reg = <0xfff98000 0x4000>; + interrupts = <16 4 5>; + status = "disable"; + }; + + ssc1: ssc@fff9c000 { + compatible = "atmel,at91rm9200-ssc"; + reg = <0xfff9c000 0x4000>; + interrupts = <17 4 5>; + status = "disable"; + }; + macb0: ethernet@fffbc000 { compatible = "cdns,at32ap7000-macb", "cdns,macb"; reg = <0xfffbc000 0x100>; diff --git a/arch/arm/boot/dts/at91sam9g45.dtsi b/arch/arm/boot/dts/at91sam9g45.dtsi index 3add030..cd9af7c 100644 --- a/arch/arm/boot/dts/at91sam9g45.dtsi +++ b/arch/arm/boot/dts/at91sam9g45.dtsi @@ -31,6 +31,8 @@ tcb1 = &tcb1; i2c0 = &i2c0; i2c1 = &i2c1; + ssc0 = &ssc0; + ssc1 = &ssc1; }; cpus { cpu@0 { @@ -226,6 +228,20 @@ status = "disabled"; }; + ssc0: ssc@fff9c000 { + compatible = "atmel,at91sam9g45-ssc"; + reg = <0xfff9c000 0x4000>; + interrupts = <16 4 5>; + status = "disable"; + }; + + ssc0: ssc@fffa0000 { + compatible = "atmel,at91sam9g45-ssc"; + reg = <0xfffa0000 0x4000>; + interrupts = <17 4 5>; + status = "disable"; + }; + adc0: adc@fffb0000 { compatible = "atmel,at91sam9260-adc"; reg = <0xfffb0000 0x100>; diff --git a/arch/arm/boot/dts/at91sam9x5.dtsi b/arch/arm/boot/dts/at91sam9x5.dtsi index 03fc136..69667d0 100644 --- a/arch/arm/boot/dts/at91sam9x5.dtsi +++ b/arch/arm/boot/dts/at91sam9x5.dtsi @@ -30,6 +30,7 @@ i2c0 = &i2c0; i2c1 = &i2c1; i2c2 = &i2c2; + ssc0 = &ssc0; }; cpus { cpu@0 { @@ -87,6 +88,13 @@ interrupts = <1 4 7>; }; + ssc0: ssc@f0010000 { + compatible = "atmel,at91sam9g45-ssc"; + reg = <0xf0010000 0x4000>; + interrupts = <28 4 5>; + status = "disable"; + }; + tcb0: timer@f8008000 { compatible = "atmel,at91sam9x5-tcb"; reg = <0xf8008000 0x100>; diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c index 85d53c5..6d65feb 100644 --- a/arch/arm/mach-at91/at91rm9200.c +++ b/arch/arm/mach-at91/at91rm9200.c @@ -187,6 +187,9 @@ static struct clk_lookup periph_clocks_lookups[] = { CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk), CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk), CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.2", &ssc2_clk), + CLKDEV_CON_DEV_ID("pclk", "fffd0000.ssc", &ssc0_clk), + CLKDEV_CON_DEV_ID("pclk", "fffd4000.ssc", &ssc1_clk), + CLKDEV_CON_DEV_ID("pclk", "fffd8000.ssc", &ssc2_clk), CLKDEV_CON_DEV_ID(NULL, "i2c-at91rm9200", &twi_clk), /* fake hclk clock */ CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &ohci_clk), diff --git a/arch/arm/mach-at91/at91sam9260.c b/arch/arm/mach-at91/at91sam9260.c index 2c8aab0..54d4aea 100644 --- a/arch/arm/mach-at91/at91sam9260.c +++ b/arch/arm/mach-at91/at91sam9260.c @@ -211,6 +211,7 @@ static struct clk_lookup periph_clocks_lookups[] = { CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.1", &tc4_clk), CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.1", &tc5_clk), CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc_clk), + CLKDEV_CON_DEV_ID("pclk", "fffbc000.ssc", &ssc_clk), CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9260", &twi_clk), CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g20", &twi_clk), /* more usart lookup table for DT entries */ diff --git a/arch/arm/mach-at91/at91sam9261.c b/arch/arm/mach-at91/at91sam9261.c index 4e8c56e..5c7a482 100644 --- a/arch/arm/mach-at91/at91sam9261.c +++ b/arch/arm/mach-at91/at91sam9261.c @@ -177,6 +177,9 @@ static struct clk_lookup periph_clocks_lookups[] = { CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk), CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk), CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.2", &ssc2_clk), + CLKDEV_CON_DEV_ID("pclk", "fffbc000.ssc", &ssc0_clk), + CLKDEV_CON_DEV_ID("pclk", "fffc0000.ssc", &ssc1_clk), + CLKDEV_CON_DEV_ID("pclk", "fffc4000.ssc", &ssc2_clk), CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &hck0), CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9261", &twi_clk), CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g10", &twi_clk), diff --git a/arch/arm/mach-at91/at91sam9263.c b/arch/arm/mach-at91/at91sam9263.c index 95a5471..1f523de 100644 --- a/arch/arm/mach-at91/at91sam9263.c +++ b/arch/arm/mach-at91/at91sam9263.c @@ -188,6 +188,8 @@ static struct clk_lookup periph_clocks_lookups[] = { CLKDEV_CON_ID("hclk", &macb_clk), CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk), CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk), + CLKDEV_CON_DEV_ID("pclk", "fff98000.ssc", &ssc0_clk), + CLKDEV_CON_DEV_ID("pclk", "fff9c000.ssc", &ssc1_clk), CLKDEV_CON_DEV_ID("mci_clk", "atmel_mci.0", &mmc0_clk), CLKDEV_CON_DEV_ID("mci_clk", "atmel_mci.1", &mmc1_clk), CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.0", &spi0_clk), diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c index f4f96a6..a4282d3 100644 --- a/arch/arm/mach-at91/at91sam9g45.c +++ b/arch/arm/mach-at91/at91sam9g45.c @@ -241,6 +241,8 @@ static struct clk_lookup periph_clocks_lookups[] = { CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g10.1", &twi1_clk), CLKDEV_CON_DEV_ID("pclk", "at91sam9g45_ssc.0", &ssc0_clk), CLKDEV_CON_DEV_ID("pclk", "at91sam9g45_ssc.1", &ssc1_clk), + CLKDEV_CON_DEV_ID("pclk", "fff9c000.ssc", &ssc0_clk), + CLKDEV_CON_DEV_ID("pclk", "fffa0000.ssc", &ssc1_clk), CLKDEV_CON_DEV_ID(NULL, "atmel-trng", &trng_clk), CLKDEV_CON_DEV_ID(NULL, "atmel_sha", &aestdessha_clk), CLKDEV_CON_DEV_ID(NULL, "atmel_tdes", &aestdessha_clk), diff --git a/arch/arm/mach-at91/at91sam9rl.c b/arch/arm/mach-at91/at91sam9rl.c index 4110b54..b683fdc 100644 --- a/arch/arm/mach-at91/at91sam9rl.c +++ b/arch/arm/mach-at91/at91sam9rl.c @@ -186,6 +186,8 @@ static struct clk_lookup periph_clocks_lookups[] = { CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk), CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk), CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk), + CLKDEV_CON_DEV_ID("pclk", "fffc0000.ssc", &ssc0_clk), + CLKDEV_CON_DEV_ID("pclk", "fffc4000.ssc", &ssc1_clk), CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g20.0", &twi0_clk), CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g20.1", &twi1_clk), CLKDEV_CON_ID("pioA", &pioA_clk), diff --git a/arch/arm/mach-at91/at91sam9x5.c b/arch/arm/mach-at91/at91sam9x5.c index e503538..18fbbb2 100644 --- a/arch/arm/mach-at91/at91sam9x5.c +++ b/arch/arm/mach-at91/at91sam9x5.c @@ -231,6 +231,7 @@ static struct clk_lookup periph_clocks_lookups[] = { CLKDEV_CON_DEV_ID("t0_clk", "f800c000.timer", &tcb0_clk), CLKDEV_CON_DEV_ID("dma_clk", "ffffec00.dma-controller", &dma0_clk), CLKDEV_CON_DEV_ID("dma_clk", "ffffee00.dma-controller", &dma1_clk), + CLKDEV_CON_DEV_ID("pclk", "f0010000.ssc", &ssc_clk), CLKDEV_CON_DEV_ID(NULL, "f8010000.i2c", &twi0_clk), CLKDEV_CON_DEV_ID(NULL, "f8014000.i2c", &twi1_clk), CLKDEV_CON_DEV_ID(NULL, "f8018000.i2c", &twi2_clk), diff --git a/drivers/misc/atmel-ssc.c b/drivers/misc/atmel-ssc.c index f40abd8..a769719 100644 --- a/drivers/misc/atmel-ssc.c +++ b/drivers/misc/atmel-ssc.c @@ -18,6 +18,8 @@ #include <linux/slab.h> #include <linux/module.h> +#include <linux/of.h> + /* Serialize access to ssc_list and user count */ static DEFINE_SPINLOCK(user_lock); static LIST_HEAD(ssc_list); @@ -29,7 +31,13 @@ struct ssc_device *ssc_request(unsigned int ssc_num) spin_lock(&user_lock); list_for_each_entry(ssc, &ssc_list, list) { - if (ssc->pdev->id == ssc_num) { + if (ssc->pdev->dev.of_node) { + if (of_alias_get_id(ssc->pdev->dev.of_node, "ssc") + == ssc_num) { + ssc_valid = 1; + break; + } + } else if (ssc->pdev->id == ssc_num) { ssc_valid = 1; break; } @@ -88,10 +96,41 @@ static const struct platform_device_id atmel_ssc_devtypes[] = { } }; +#ifdef CONFIG_OF +static const struct of_device_id atmel_ssc_dt_ids[] = { + { + .compatible = "atmel,at91rm9200-ssc", + .data = &at91rm9200_config, + }, { + .compatible = "atmel,at91sam9g45-ssc", + .data = &at91sam9g45_config, + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(of, atmel_ssc_dt_ids); +#endif + +static inline const struct atmel_ssc_platform_data * __init + atmel_ssc_get_driver_data(struct platform_device *pdev) +{ + if (pdev->dev.of_node) { + const struct of_device_id *match; + match = of_match_node(atmel_ssc_dt_ids, pdev->dev.of_node); + if (match == NULL) + return NULL; + return match->data; + } + + return (struct atmel_ssc_platform_data *) + platform_get_device_id(pdev)->driver_data; +} + static int ssc_probe(struct platform_device *pdev) { struct resource *regs; struct ssc_device *ssc; + const struct atmel_ssc_platform_data *plat_dat; ssc = devm_kzalloc(&pdev->dev, sizeof(struct ssc_device), GFP_KERNEL); if (!ssc) { @@ -100,8 +139,11 @@ static int ssc_probe(struct platform_device *pdev) } ssc->pdev = pdev; - ssc->pdata = (struct atmel_ssc_platform_data *) - platform_get_device_id(pdev)->driver_data; + + plat_dat = atmel_ssc_get_driver_data(pdev); + if (!plat_dat) + return -ENODEV; + ssc->pdata = (struct atmel_ssc_platform_data *)plat_dat; regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!regs) { @@ -160,6 +202,7 @@ static struct platform_driver ssc_driver = { .driver = { .name = "ssc", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(atmel_ssc_dt_ids), }, .id_table = atmel_ssc_devtypes, .probe = ssc_probe, -- 1.7.9.5 _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
