From 12ad2be9d1db3dcce08f29bdc5415db3af58fa60 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Mon, 24 Sep 2012 03:39:39 +0200 Subject: mtd: m25p80: Make fast read configurable via DT Add DT property "m25p,fast-read" that signalises the particular chip supports "fast read" opcode. Signed-off-by: Marek Vasut Signed-off-by: Artem Bityutskiy --- Documentation/devicetree/bindings/mtd/m25p80.txt | 29 ++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 Documentation/devicetree/bindings/mtd/m25p80.txt (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/mtd/m25p80.txt b/Documentation/devicetree/bindings/mtd/m25p80.txt new file mode 100644 index 000000000000..6d3d57609470 --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/m25p80.txt @@ -0,0 +1,29 @@ +* MTD SPI driver for ST M25Pxx (and similar) serial flash chips + +Required properties: +- #address-cells, #size-cells : Must be present if the device has sub-nodes + representing partitions. +- compatible : Should be the manufacturer and the name of the chip. Bear in mind + the DT binding is not Linux-only, but in case of Linux, see the + "m25p_ids" table in drivers/mtd/devices/m25p80.c for the list of + supported chips. +- reg : Chip-Select number +- spi-max-frequency : Maximum frequency of the SPI bus the chip can operate at + +Optional properties: +- m25p,fast-read : Use the "fast read" opcode to read data from the chip instead + of the usual "read" opcode. This opcode is not supported by + all chips and support for it can not be detected at runtime. + Refer to your chips' datasheet to check if this is supported + by your chip. + +Example: + + flash: m25p80@0 { + #address-cells = <1>; + #size-cells = <1>; + compatible = "spansion,m25p80"; + reg = <0>; + spi-max-frequency = <40000000>; + m25p,fast-read; + }; -- cgit v1.2.3 From 30f9f2fb7ba032665c8cea7694c815f18ed47a34 Mon Sep 17 00:00:00 2001 From: Dinh Nguyen Date: Thu, 27 Sep 2012 10:58:06 -0600 Subject: mtd: denali: add a DT driver Add a device tree version of the Denali NAND driver. Based on an original patch from Jamie Iles to add a MMIO version of this driver. Signed-off-by: Dinh Nguyen Signed-off-by: Artem Bityutskiy --- .../devicetree/bindings/mtd/denali-nand.txt | 23 +++ drivers/mtd/nand/Kconfig | 9 +- drivers/mtd/nand/Makefile | 1 + drivers/mtd/nand/denali.h | 1 + drivers/mtd/nand/denali_dt.c | 167 +++++++++++++++++++++ 5 files changed, 200 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/mtd/denali-nand.txt create mode 100644 drivers/mtd/nand/denali_dt.c (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/mtd/denali-nand.txt b/Documentation/devicetree/bindings/mtd/denali-nand.txt new file mode 100644 index 000000000000..b04d03a1d499 --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/denali-nand.txt @@ -0,0 +1,23 @@ +* Denali NAND controller + +Required properties: + - compatible : should be "denali,denali-nand-dt" + - reg : should contain registers location and length for data and reg. + - reg-names: Should contain the reg names "nand_data" and "denali_reg" + - interrupts : The interrupt number. + - dm-mask : DMA bit mask + +The device tree may optionally contain sub-nodes describing partitions of the +address space. See partition.txt for more detail. + +Examples: + +nand: nand@ff900000 { + #address-cells = <1>; + #size-cells = <1>; + compatible = "denali,denali-nand-dt"; + reg = <0xff900000 0x100000>, <0xffb80000 0x10000>; + reg-names = "nand_data", "denali_reg"; + interrupts = <0 144 4>; + dma-mask = <0xffffffff>; +}; diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig index 5102e87f8df0..ee803d611e4e 100644 --- a/drivers/mtd/nand/Kconfig +++ b/drivers/mtd/nand/Kconfig @@ -69,7 +69,14 @@ config MTD_NAND_DENALI_PCI help Enable the driver for NAND flash on Intel Moorestown, using the Denali NAND controller core. - + +config MTD_NAND_DENALI_DT + tristate "Support Denali NAND controller as a DT device" + depends on HAVE_CLK && MTD_NAND_DENALI + help + Enable the driver for NAND flash on platforms using a Denali NAND + controller as a DT device. + config MTD_NAND_DENALI_SCRATCH_REG_ADDR hex "Denali NAND size scratch register address" default "0xFF108018" diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index 96a6171c9d8f..38358c90771e 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -14,6 +14,7 @@ obj-$(CONFIG_MTD_NAND_AMS_DELTA) += ams-delta.o obj-$(CONFIG_MTD_NAND_AUTCPU12) += autcpu12.o obj-$(CONFIG_MTD_NAND_DENALI) += denali.o obj-$(CONFIG_MTD_NAND_DENALI_PCI) += denali_pci.o +obj-$(CONFIG_MTD_NAND_DENALI_DT) += denali_dt.o obj-$(CONFIG_MTD_NAND_AU1550) += au1550nd.o obj-$(CONFIG_MTD_NAND_BF5XX) += bf5xx_nand.o obj-$(CONFIG_MTD_NAND_PPCHAMELEONEVB) += ppchameleonevb.o diff --git a/drivers/mtd/nand/denali.h b/drivers/mtd/nand/denali.h index e5aa99583e43..cec5712862c9 100644 --- a/drivers/mtd/nand/denali.h +++ b/drivers/mtd/nand/denali.h @@ -466,6 +466,7 @@ struct nand_buf { #define INTEL_CE4100 1 #define INTEL_MRST 2 +#define DT 3 struct denali_nand_info { struct mtd_info mtd; diff --git a/drivers/mtd/nand/denali_dt.c b/drivers/mtd/nand/denali_dt.c new file mode 100644 index 000000000000..fbabbaa04374 --- /dev/null +++ b/drivers/mtd/nand/denali_dt.c @@ -0,0 +1,167 @@ +/* + * NAND Flash Controller Device Driver for DT + * + * Copyright © 2011, Picochip. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "denali.h" + +struct denali_dt { + struct denali_nand_info denali; + struct clk *clk; +}; + +static void __iomem *request_and_map(struct device *dev, + const struct resource *res) +{ + void __iomem *ptr; + + if (!devm_request_mem_region(dev, res->start, resource_size(res), + "denali-dt")) { + dev_err(dev, "unable to request %s\n", res->name); + return NULL; + } + + ptr = devm_ioremap_nocache(dev, res->start, resource_size(res)); + if (!res) + dev_err(dev, "ioremap_nocache of %s failed!", res->name); + + return ptr; +} + +static const struct of_device_id denali_nand_dt_ids[] = { + { .compatible = "denali,denali-nand-dt" }, + { /* sentinel */ } + }; + +MODULE_DEVICE_TABLE(of, denali_nand_dt_ids); + +static u64 denali_dma_mask; + +static int __devinit denali_dt_probe(struct platform_device *ofdev) +{ + struct resource *denali_reg, *nand_data; + struct denali_dt *dt; + struct denali_nand_info *denali; + int ret; + const struct of_device_id *of_id; + + of_id = of_match_device(denali_nand_dt_ids, &ofdev->dev); + if (of_id) { + ofdev->id_entry = of_id->data; + } else { + pr_err("Failed to find the right device id.\n"); + return -ENOMEM; + } + + dt = devm_kzalloc(&ofdev->dev, sizeof(*dt), GFP_KERNEL); + if (!dt) + return -ENOMEM; + denali = &dt->denali; + + denali_reg = platform_get_resource_byname(ofdev, IORESOURCE_MEM, "denali_reg"); + nand_data = platform_get_resource_byname(ofdev, IORESOURCE_MEM, "nand_data"); + if (!denali_reg || !nand_data) { + dev_err(&ofdev->dev, "resources not completely defined\n"); + return -EINVAL; + } + + denali->platform = DT; + denali->dev = &ofdev->dev; + denali->irq = platform_get_irq(ofdev, 0); + if (denali->irq < 0) { + dev_err(&ofdev->dev, "no irq defined\n"); + return -ENXIO; + } + + denali->flash_reg = request_and_map(&ofdev->dev, denali_reg); + if (!denali->flash_reg) + return -ENOMEM; + + denali->flash_mem = request_and_map(&ofdev->dev, nand_data); + if (!denali->flash_mem) + return -ENOMEM; + + if (!of_property_read_u32(ofdev->dev.of_node, + "dma-mask", (u32 *)&denali_dma_mask)) { + denali->dev->dma_mask = &denali_dma_mask; + } else { + denali->dev->dma_mask = NULL; + } + + dt->clk = clk_get(&ofdev->dev, NULL); + if (IS_ERR(dt->clk)) { + dev_err(&ofdev->dev, "no clk available\n"); + return PTR_ERR(dt->clk); + } + clk_prepare_enable(dt->clk); + + ret = denali_init(denali); + if (ret) + goto out_disable_clk; + + platform_set_drvdata(ofdev, dt); + return 0; + +out_disable_clk: + clk_disable_unprepare(dt->clk); + clk_put(dt->clk); + + return ret; +} + +static int __devexit denali_dt_remove(struct platform_device *ofdev) +{ + struct denali_dt *dt = platform_get_drvdata(ofdev); + + denali_remove(&dt->denali); + clk_disable(dt->clk); + clk_put(dt->clk); + + return 0; +} + +static struct platform_driver denali_dt_driver = { + .probe = denali_dt_probe, + .remove = __devexit_p(denali_dt_remove), + .driver = { + .name = "denali-nand-dt", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(denali_nand_dt_ids), + }, +}; + +static int __init denali_init_dt(void) +{ + return platform_driver_register(&denali_dt_driver); +} +module_init(denali_init_dt); + +static void __exit denali_exit_dt(void) +{ + platform_driver_unregister(&denali_dt_driver); +} +module_exit(denali_exit_dt); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Jamie Iles"); +MODULE_DESCRIPTION("DT driver for Denali NAND controller"); -- cgit v1.2.3 From 6d7b42a447f92eb3e7e410bbf62042693eb040f7 Mon Sep 17 00:00:00 2001 From: Jean-Christophe PLAGNIOL-VILLARD Date: Thu, 4 Oct 2012 15:14:16 +0200 Subject: mtd: fsmc_nand: pass the ale and cmd resource via resource Do not use the platform_data to pass resource and be smart in the drivers. Just pass it via resource Switch to devm_request_and_ioremap at the sametime Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD Acked-by: Linus Walleij Reviewed-By: Vipin Kumar Signed-off-by: Artem Bityutskiy --- .../devicetree/bindings/mtd/fsmc-nand.txt | 12 +++--- arch/arm/boot/dts/spear13xx.dtsi | 10 ++--- arch/arm/boot/dts/spear300.dtsi | 8 ++-- arch/arm/boot/dts/spear310.dtsi | 8 ++-- arch/arm/boot/dts/spear320.dtsi | 8 ++-- arch/arm/boot/dts/spear600.dtsi | 8 ++-- arch/arm/mach-u300/core.c | 14 ++++++- drivers/mtd/nand/fsmc_nand.c | 44 ++++++---------------- include/linux/mtd/fsmc.h | 3 -- 9 files changed, 49 insertions(+), 66 deletions(-) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/mtd/fsmc-nand.txt b/Documentation/devicetree/bindings/mtd/fsmc-nand.txt index e2c663b354d2..e3ea32e7de3e 100644 --- a/Documentation/devicetree/bindings/mtd/fsmc-nand.txt +++ b/Documentation/devicetree/bindings/mtd/fsmc-nand.txt @@ -3,9 +3,7 @@ Required properties: - compatible : "st,spear600-fsmc-nand" - reg : Address range of the mtd chip -- reg-names: Should contain the reg names "fsmc_regs" and "nand_data" -- st,ale-off : Chip specific offset to ALE -- st,cle-off : Chip specific offset to CLE +- reg-names: Should contain the reg names "fsmc_regs", "nand_data", "nand_addr" and "nand_cmd" Optional properties: - bank-width : Width (in bytes) of the device. If not present, the width @@ -19,10 +17,10 @@ Example: #address-cells = <1>; #size-cells = <1>; reg = <0xd1800000 0x1000 /* FSMC Register */ - 0xd2000000 0x4000>; /* NAND Base */ - reg-names = "fsmc_regs", "nand_data"; - st,ale-off = <0x20000>; - st,cle-off = <0x10000>; + 0xd2000000 0x0010 /* NAND Base DATA */ + 0xd2020000 0x0010 /* NAND Base ADDR */ + 0xd2010000 0x0010>; /* NAND Base CMD */ + reg-names = "fsmc_regs", "nand_data", "nand_addr", "nand_cmd"; bank-width = <1>; nand-skip-bbtscan; diff --git a/arch/arm/boot/dts/spear13xx.dtsi b/arch/arm/boot/dts/spear13xx.dtsi index f7b84aced654..14a6d15c2a81 100644 --- a/arch/arm/boot/dts/spear13xx.dtsi +++ b/arch/arm/boot/dts/spear13xx.dtsi @@ -104,15 +104,15 @@ compatible = "st,spear600-fsmc-nand"; #address-cells = <1>; #size-cells = <1>; - reg = <0xb0000000 0x1000 /* FSMC Register */ - 0xb0800000 0x0010>; /* NAND Base */ - reg-names = "fsmc_regs", "nand_data"; + reg = <0xb0000000 0x1000 /* FSMC Register*/ + 0xb0800000 0x0010 /* NAND Base DATA */ + 0xb0820000 0x0010 /* NAND Base ADDR */ + 0xb0810000 0x0010>; /* NAND Base CMD */ + reg-names = "fsmc_regs", "nand_data", "nand_addr", "nand_cmd"; interrupts = <0 20 0x4 0 21 0x4 0 22 0x4 0 23 0x4>; - st,ale-off = <0x20000>; - st,cle-off = <0x10000>; status = "disabled"; }; diff --git a/arch/arm/boot/dts/spear300.dtsi b/arch/arm/boot/dts/spear300.dtsi index ed3627c116cc..bc436387d7f9 100644 --- a/arch/arm/boot/dts/spear300.dtsi +++ b/arch/arm/boot/dts/spear300.dtsi @@ -38,10 +38,10 @@ #address-cells = <1>; #size-cells = <1>; reg = <0x94000000 0x1000 /* FSMC Register */ - 0x80000000 0x0010>; /* NAND Base */ - reg-names = "fsmc_regs", "nand_data"; - st,ale-off = <0x20000>; - st,cle-off = <0x10000>; + 0x80000000 0x0010 /* NAND Base DATA */ + 0x80020000 0x0010 /* NAND Base ADDR */ + 0x80010000 0x0010>; /* NAND Base CMD */ + reg-names = "fsmc_regs", "nand_data", "nand_addr", "nand_cmd"; status = "disabled"; }; diff --git a/arch/arm/boot/dts/spear310.dtsi b/arch/arm/boot/dts/spear310.dtsi index 62fc4fb3e5f9..7840e529aba2 100644 --- a/arch/arm/boot/dts/spear310.dtsi +++ b/arch/arm/boot/dts/spear310.dtsi @@ -32,10 +32,10 @@ #address-cells = <1>; #size-cells = <1>; reg = <0x44000000 0x1000 /* FSMC Register */ - 0x40000000 0x0010>; /* NAND Base */ - reg-names = "fsmc_regs", "nand_data"; - st,ale-off = <0x10000>; - st,cle-off = <0x20000>; + 0x40000000 0x0010 /* NAND Base DATA */ + 0x40020000 0x0010 /* NAND Base ADDR */ + 0x40010000 0x0010>; /* NAND Base CMD */ + reg-names = "fsmc_regs", "nand_data", "nand_addr", "nand_cmd"; status = "disabled"; }; diff --git a/arch/arm/boot/dts/spear320.dtsi b/arch/arm/boot/dts/spear320.dtsi index 1f49d69595a0..5ad820641ac0 100644 --- a/arch/arm/boot/dts/spear320.dtsi +++ b/arch/arm/boot/dts/spear320.dtsi @@ -38,10 +38,10 @@ #address-cells = <1>; #size-cells = <1>; reg = <0x4c000000 0x1000 /* FSMC Register */ - 0x50000000 0x0010>; /* NAND Base */ - reg-names = "fsmc_regs", "nand_data"; - st,ale-off = <0x20000>; - st,cle-off = <0x10000>; + 0x50000000 0x0010 /* NAND Base DATA */ + 0x50020000 0x0010 /* NAND Base ADDR */ + 0x50010000 0x0010>; /* NAND Base CMD */ + reg-names = "fsmc_regs", "nand_data", "nand_addr", "nand_cmd"; status = "disabled"; }; diff --git a/arch/arm/boot/dts/spear600.dtsi b/arch/arm/boot/dts/spear600.dtsi index a3c36e47d7ef..4ecc66f5ac88 100644 --- a/arch/arm/boot/dts/spear600.dtsi +++ b/arch/arm/boot/dts/spear600.dtsi @@ -67,10 +67,10 @@ #address-cells = <1>; #size-cells = <1>; reg = <0xd1800000 0x1000 /* FSMC Register */ - 0xd2000000 0x4000>; /* NAND Base */ - reg-names = "fsmc_regs", "nand_data"; - st,ale-off = <0x20000>; - st,cle-off = <0x10000>; + 0xd2000000 0x0010 /* NAND Base DATA */ + 0xd2020000 0x0010 /* NAND Base ADDR */ + 0xd2010000 0x0010>; /* NAND Base CMD */ + reg-names = "fsmc_regs", "nand_data", "nand_addr", "nand_cmd"; status = "disabled"; }; diff --git a/arch/arm/mach-u300/core.c b/arch/arm/mach-u300/core.c index b8efac4daed8..f642a1552346 100644 --- a/arch/arm/mach-u300/core.c +++ b/arch/arm/mach-u300/core.c @@ -251,6 +251,18 @@ static struct resource rtc_resources[] = { * but these are not yet used by the driver. */ static struct resource fsmc_resources[] = { + { + .name = "nand_addr", + .start = U300_NAND_CS0_PHYS_BASE + PLAT_NAND_ALE, + .end = U300_NAND_CS0_PHYS_BASE + PLAT_NAND_ALE + SZ_16K - 1, + .flags = IORESOURCE_MEM, + }, + { + .name = "nand_cmd", + .start = U300_NAND_CS0_PHYS_BASE + PLAT_NAND_CLE, + .end = U300_NAND_CS0_PHYS_BASE + PLAT_NAND_CLE + SZ_16K - 1, + .flags = IORESOURCE_MEM, + }, { .name = "nand_data", .start = U300_NAND_CS0_PHYS_BASE, @@ -1496,8 +1508,6 @@ static struct fsmc_nand_platform_data nand_platform_data = { .nr_partitions = ARRAY_SIZE(u300_partitions), .options = NAND_SKIP_BBTSCAN, .width = FSMC_NAND_BW8, - .ale_off = PLAT_NAND_ALE, - .cle_off = PLAT_NAND_CLE, }; static struct platform_device nand_device = { diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c index 38d26240d8b1..cb8645087151 100644 --- a/drivers/mtd/nand/fsmc_nand.c +++ b/drivers/mtd/nand/fsmc_nand.c @@ -876,8 +876,6 @@ static int __devinit fsmc_nand_probe_config_dt(struct platform_device *pdev, return -EINVAL; } } - of_property_read_u32(np, "st,ale-off", &pdata->ale_off); - of_property_read_u32(np, "st,cle-off", &pdata->cle_off); if (of_get_property(np, "nand-skip-bbtscan", NULL)) pdata->options = NAND_SKIP_BBTSCAN; @@ -935,41 +933,28 @@ static int __init fsmc_nand_probe(struct platform_device *pdev) if (!res) return -EINVAL; - if (!devm_request_mem_region(&pdev->dev, res->start, resource_size(res), - pdev->name)) { - dev_err(&pdev->dev, "Failed to get memory data resourse\n"); - return -ENOENT; - } - - host->data_pa = (dma_addr_t)res->start; - host->data_va = devm_ioremap(&pdev->dev, res->start, - resource_size(res)); + host->data_va = devm_request_and_ioremap(&pdev->dev, res); if (!host->data_va) { dev_err(&pdev->dev, "data ioremap failed\n"); return -ENOMEM; } + host->data_pa = (dma_addr_t)res->start; - if (!devm_request_mem_region(&pdev->dev, res->start + pdata->ale_off, - resource_size(res), pdev->name)) { - dev_err(&pdev->dev, "Failed to get memory ale resourse\n"); - return -ENOENT; - } + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_addr"); + if (!res) + return -EINVAL; - host->addr_va = devm_ioremap(&pdev->dev, res->start + pdata->ale_off, - resource_size(res)); + host->addr_va = devm_request_and_ioremap(&pdev->dev, res); if (!host->addr_va) { dev_err(&pdev->dev, "ale ioremap failed\n"); return -ENOMEM; } - if (!devm_request_mem_region(&pdev->dev, res->start + pdata->cle_off, - resource_size(res), pdev->name)) { - dev_err(&pdev->dev, "Failed to get memory cle resourse\n"); - return -ENOENT; - } + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_cmd"); + if (!res) + return -EINVAL; - host->cmd_va = devm_ioremap(&pdev->dev, res->start + pdata->cle_off, - resource_size(res)); + host->cmd_va = devm_request_and_ioremap(&pdev->dev, res); if (!host->cmd_va) { dev_err(&pdev->dev, "ale ioremap failed\n"); return -ENOMEM; @@ -979,14 +964,7 @@ static int __init fsmc_nand_probe(struct platform_device *pdev) if (!res) return -EINVAL; - if (!devm_request_mem_region(&pdev->dev, res->start, resource_size(res), - pdev->name)) { - dev_err(&pdev->dev, "Failed to get memory regs resourse\n"); - return -ENOENT; - } - - host->regs_va = devm_ioremap(&pdev->dev, res->start, - resource_size(res)); + host->regs_va = devm_request_and_ioremap(&pdev->dev, res); if (!host->regs_va) { dev_err(&pdev->dev, "regs ioremap failed\n"); return -ENOMEM; diff --git a/include/linux/mtd/fsmc.h b/include/linux/mtd/fsmc.h index b20029221fb1..d6ed61ef451d 100644 --- a/include/linux/mtd/fsmc.h +++ b/include/linux/mtd/fsmc.h @@ -155,9 +155,6 @@ struct fsmc_nand_platform_data { unsigned int width; unsigned int bank; - /* CLE, ALE offsets */ - unsigned int cle_off; - unsigned int ale_off; enum access_mode mode; void (*select_bank)(uint32_t bank, uint32_t busw); -- cgit v1.2.3 From 7c8f680e96edbd9896b13b5e6ff39bc5852dce2a Mon Sep 17 00:00:00 2001 From: Bastian Hecht Date: Fri, 19 Oct 2012 12:15:36 +0200 Subject: mtd: sh_flctl: Add device tree support The flctl can now be probed via device tree setup in addition to the existing platform data way. SoC specific setup data is set in the .data member of the OF match, so kept within the driver itself, while board/user specific setup - like partitioning - is taken from the device tree. Actual configuration is added for the SoC sh7372. Signed-off-by: Bastian Hecht Signed-off-by: Artem Bityutskiy --- .../devicetree/bindings/mtd/flctl-nand.txt | 49 +++++++++++ drivers/mtd/nand/sh_flctl.c | 94 ++++++++++++++++++++-- 2 files changed, 136 insertions(+), 7 deletions(-) create mode 100644 Documentation/devicetree/bindings/mtd/flctl-nand.txt (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/mtd/flctl-nand.txt b/Documentation/devicetree/bindings/mtd/flctl-nand.txt new file mode 100644 index 000000000000..427f46dc60ad --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/flctl-nand.txt @@ -0,0 +1,49 @@ +FLCTL NAND controller + +Required properties: +- compatible : "renesas,shmobile-flctl-sh7372" +- reg : Address range of the FLCTL +- interrupts : flste IRQ number +- nand-bus-width : bus width to NAND chip + +Optional properties: +- dmas: DMA specifier(s) +- dma-names: name for each DMA specifier. Valid names are + "data_tx", "data_rx", "ecc_tx", "ecc_rx" + +The DMA fields are not used yet in the driver but are listed here for +completing the bindings. + +The device tree may optionally contain sub-nodes describing partitions of the +address space. See partition.txt for more detail. + +Example: + + flctl@e6a30000 { + #address-cells = <1>; + #size-cells = <1>; + compatible = "renesas,shmobile-flctl-sh7372"; + reg = <0xe6a30000 0x100>; + interrupts = <0x0d80>; + + nand-bus-width = <16>; + + dmas = <&dmac 1 /* data_tx */ + &dmac 2;> /* data_rx */ + dma-names = "data_tx", "data_rx"; + + system@0 { + label = "system"; + reg = <0x0 0x8000000>; + }; + + userdata@8000000 { + label = "userdata"; + reg = <0x8000000 0x10000000>; + }; + + cache@18000000 { + label = "cache"; + reg = <0x18000000 0x8000000>; + }; + }; diff --git a/drivers/mtd/nand/sh_flctl.c b/drivers/mtd/nand/sh_flctl.c index 6dc0369aa44b..d51e3c15d379 100644 --- a/drivers/mtd/nand/sh_flctl.c +++ b/drivers/mtd/nand/sh_flctl.c @@ -29,6 +29,9 @@ #include #include #include +#include +#include +#include #include #include #include @@ -1016,6 +1019,73 @@ static irqreturn_t flctl_handle_flste(int irq, void *dev_id) return IRQ_HANDLED; } +#ifdef CONFIG_OF +struct flctl_soc_config { + unsigned long flcmncr_val; + unsigned has_hwecc:1; + unsigned use_holden:1; +}; + +static struct flctl_soc_config flctl_sh7372_config = { + .flcmncr_val = CLK_16B_12L_4H | TYPESEL_SET | SHBUSSEL, + .has_hwecc = 1, + .use_holden = 1, +}; + +static const struct of_device_id of_flctl_match[] = { + { .compatible = "renesas,shmobile-flctl-sh7372", + .data = &flctl_sh7372_config }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_flctl_match); + +static struct sh_flctl_platform_data *flctl_parse_dt(struct device *dev) +{ + const struct of_device_id *match; + struct flctl_soc_config *config; + struct sh_flctl_platform_data *pdata; + struct device_node *dn = dev->of_node; + int ret; + + match = of_match_device(of_flctl_match, dev); + if (match) + config = (struct flctl_soc_config *)match->data; + else { + dev_err(dev, "%s: no OF configuration attached\n", __func__); + return NULL; + } + + pdata = devm_kzalloc(dev, sizeof(struct sh_flctl_platform_data), + GFP_KERNEL); + if (!pdata) { + dev_err(dev, "%s: failed to allocate config data\n", __func__); + return NULL; + } + + /* set SoC specific options */ + pdata->flcmncr_val = config->flcmncr_val; + pdata->has_hwecc = config->has_hwecc; + pdata->use_holden = config->use_holden; + + /* parse user defined options */ + ret = of_get_nand_bus_width(dn); + if (ret == 16) + pdata->flcmncr_val |= SEL_16BIT; + else if (ret != 8) { + dev_err(dev, "%s: invalid bus width\n", __func__); + return NULL; + } + + return pdata; +} +#else /* CONFIG_OF */ +#define of_flctl_match NULL +static struct sh_flctl_platform_data *flctl_parse_dt(struct device *dev) +{ + return NULL; +} +#endif /* CONFIG_OF */ + static int __devinit flctl_probe(struct platform_device *pdev) { struct resource *res; @@ -1025,12 +1095,7 @@ static int __devinit flctl_probe(struct platform_device *pdev) struct sh_flctl_platform_data *pdata; int ret = -ENXIO; int irq; - - pdata = pdev->dev.platform_data; - if (pdata == NULL) { - dev_err(&pdev->dev, "no platform data defined\n"); - return -EINVAL; - } + struct mtd_part_parser_data ppdata = {}; flctl = kzalloc(sizeof(struct sh_flctl), GFP_KERNEL); if (!flctl) { @@ -1062,6 +1127,17 @@ static int __devinit flctl_probe(struct platform_device *pdev) goto err_flste; } + if (pdev->dev.of_node) + pdata = flctl_parse_dt(&pdev->dev); + else + pdata = pdev->dev.platform_data; + + if (!pdata) { + dev_err(&pdev->dev, "no setup data defined\n"); + ret = -EINVAL; + goto err_pdata; + } + platform_set_drvdata(pdev, flctl); flctl_mtd = &flctl->mtd; nand = &flctl->chip; @@ -1104,13 +1180,16 @@ static int __devinit flctl_probe(struct platform_device *pdev) if (ret) goto err_chip; - mtd_device_register(flctl_mtd, pdata->parts, pdata->nr_parts); + ppdata.of_node = pdev->dev.of_node; + ret = mtd_device_parse_register(flctl_mtd, NULL, &ppdata, pdata->parts, + pdata->nr_parts); return 0; err_chip: flctl_release_dma(flctl); pm_runtime_disable(&pdev->dev); +err_pdata: free_irq(irq, flctl); err_flste: iounmap(flctl->reg); @@ -1138,6 +1217,7 @@ static struct platform_driver flctl_driver = { .driver = { .name = "sh_flctl", .owner = THIS_MODULE, + .of_match_table = of_flctl_match, }, }; -- cgit v1.2.3 From 192afdbfbc5c3346e27b3c3e3be8337495b2a41b Mon Sep 17 00:00:00 2001 From: Murali Karicheri Date: Fri, 2 Nov 2012 10:22:41 -0400 Subject: mtd: davinci: add support for parition binding nodes Enhance the driver to support partition subnodes inside the nand device bindings to describe partions on the nand device. Signed-off-by: Murali Karicheri Reviewed-by: Grant Likely Signed-off-by: Artem Bityutskiy --- Documentation/devicetree/bindings/arm/davinci/nand.txt | 8 ++++++++ drivers/mtd/nand/davinci_nand.c | 13 ++++++++++--- 2 files changed, 18 insertions(+), 3 deletions(-) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/arm/davinci/nand.txt b/Documentation/devicetree/bindings/arm/davinci/nand.txt index e37241f1fdd8..4746452c4f5d 100644 --- a/Documentation/devicetree/bindings/arm/davinci/nand.txt +++ b/Documentation/devicetree/bindings/arm/davinci/nand.txt @@ -23,6 +23,9 @@ Recommended properties : - ti,davinci-nand-buswidth: buswidth 8 or 16 - ti,davinci-nand-use-bbt: use flash based bad block table support. +nand device bindings may contain additional sub-nodes describing +partitions of the address space. See partition.txt for more detail. + Example (enbw_cmc board): aemif@60000000 { compatible = "ti,davinci-aemif"; @@ -47,5 +50,10 @@ aemif@60000000 { ti,davinci-ecc-mode = "hw"; ti,davinci-ecc-bits = <4>; ti,davinci-nand-use-bbt; + + partition@180000 { + label = "ubifs"; + reg = <0x180000 0x7e80000>; + }; }; }; diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c index 945047ad0952..3502606f6480 100644 --- a/drivers/mtd/nand/davinci_nand.c +++ b/drivers/mtd/nand/davinci_nand.c @@ -821,9 +821,16 @@ syndrome_done: if (ret < 0) goto err_scan; - ret = mtd_device_parse_register(&info->mtd, NULL, NULL, pdata->parts, - pdata->nr_parts); - + if (pdata->parts) + ret = mtd_device_parse_register(&info->mtd, NULL, NULL, + pdata->parts, pdata->nr_parts); + else { + struct mtd_part_parser_data ppdata; + + ppdata.of_node = pdev->dev.of_node; + ret = mtd_device_parse_register(&info->mtd, NULL, &ppdata, + NULL, 0); + } if (ret < 0) goto err_scan; -- cgit v1.2.3 From d68cbdd4fb04d2b756ad53c22f36943167b16340 Mon Sep 17 00:00:00 2001 From: Jean-Christophe PLAGNIOL-VILLARD Date: Wed, 7 Nov 2012 16:32:16 +0100 Subject: mtd: physmap_of: allow to specify the mtd name for retro compatiblity linux,mtd-name allow to specify the mtd name for retro capability with physmap-flash drivers as boot loader pass the mtd partition via the old device name physmap-flash. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD Signed-off-by: Artem Bityutskiy --- Documentation/devicetree/bindings/mtd/mtd-physmap.txt | 3 +++ drivers/mtd/maps/physmap_of.c | 5 ++++- 2 files changed, 7 insertions(+), 1 deletion(-) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/mtd/mtd-physmap.txt b/Documentation/devicetree/bindings/mtd/mtd-physmap.txt index 94de19b8f16b..dab7847fc800 100644 --- a/Documentation/devicetree/bindings/mtd/mtd-physmap.txt +++ b/Documentation/devicetree/bindings/mtd/mtd-physmap.txt @@ -23,6 +23,9 @@ file systems on embedded devices. unaligned accesses as implemented in the JFFS2 code via memcpy(). By defining "no-unaligned-direct-access", the flash will not be exposed directly to the MTD users (e.g. JFFS2) any more. + - linux,mtd-name: allow to specify the mtd name for retro capability with + physmap-flash drivers as boot loader pass the mtd partition via the old + device name physmap-flash. For JEDEC compatible devices, the following additional properties are defined: diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c index 6f19acadb06c..d7f19bc6de4a 100644 --- a/drivers/mtd/maps/physmap_of.c +++ b/drivers/mtd/maps/physmap_of.c @@ -170,6 +170,7 @@ static int __devinit of_flash_probe(struct platform_device *dev) resource_size_t res_size; struct mtd_part_parser_data ppdata; bool map_indirect; + const char *mtd_name; match = of_match_device(of_flash_match, &dev->dev); if (!match) @@ -178,6 +179,8 @@ static int __devinit of_flash_probe(struct platform_device *dev) reg_tuple_size = (of_n_addr_cells(dp) + of_n_size_cells(dp)) * sizeof(u32); + of_property_read_string(dp, "linux,mtd-name", &mtd_name); + /* * Get number of "reg" tuples. Scan for MTD devices on area's * described by each "reg" region. This makes it possible (including @@ -234,7 +237,7 @@ static int __devinit of_flash_probe(struct platform_device *dev) goto err_out; } - info->list[i].map.name = dev_name(&dev->dev); + info->list[i].map.name = mtd_name ?: dev_name(&dev->dev); info->list[i].map.phys = res.start; info->list[i].map.size = res_size; info->list[i].map.bankwidth = be32_to_cpup(width); -- cgit v1.2.3