Re: [PATCH 1/1] mtd: st fsmc_nand: pass the ale and cmd resource via resource

Vipin Kumar
2012-10-08T04:08:35Z

On 10/4/2012 6:44 PM, Jean-Christophe PLAGNIOL-VILLARD wrote:
> 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<plagnioj@jcrosoft.com>
> Cc: Linus Walleij<linus.walleij@linaro.org>
> Cc: Vipin Kumar<vipin.kumar@st.com>
> Cc: linux-mtd@lists.infradead.org
> ---
> .../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(-)
>
> diff --git a/Documentation/devicetree/bindings/mtd/fsmc-nand.txt b/Documentation/devicetree/bindings/mtd/fsmc-nand.txt
> index e2c663b..e3ea32e 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 f7b84ac..14a6d15 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 ed3627c..bc43638 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 62fc4fb..7840e52 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 1f49d69..5ad8206 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 a3c36e4..4ecc66f 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 ef6f602..527bcc2 100644
> --- a/arch/arm/mach-u300/core.c
> +++ b/arch/arm/mach-u300/core.c
> @@ -252,6 +252,18 @@ static struct resource rtc_resources[] = {
> */
> 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,
> .end = U300_NAND_CS0_PHYS_BASE + SZ_16K - 1,
> @@ -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 38d2624..cb86450 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 b200292..d6ed61e 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);

btw, I also have a few pending patches on this driver which I would be
sending soon

Reviewed By: Vipin Kumar <vipin.kumar@st.com>