From 363b5db21284b3f44866eaee5d2d34c3c9963f7d Mon Sep 17 00:00:00 2001 From: Boris Brezillon Date: Fri, 1 Apr 2016 14:54:25 +0200 Subject: [PATCH] mtd: nand: davinci: rely on generic DT parsing done in nand_scan_ident() The core now takes care of parsing generic DT properties in nand_scan_ident() when nand_set_flash_node() has been called. Rely on this initialization instead of calling of_get_nand_xxx() manually. Signed-off-by: Boris Brezillon --- drivers/mtd/nand/davinci_nand.c | 83 +++++++++++++++------------------ 1 file changed, 38 insertions(+), 45 deletions(-) diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c index fe3fd29af435..0198536a1944 100644 --- a/drivers/mtd/nand/davinci_nand.c +++ b/drivers/mtd/nand/davinci_nand.c @@ -34,7 +34,6 @@ #include #include #include -#include #include #include @@ -559,8 +558,6 @@ static struct davinci_nand_pdata "ti,davinci-mask-chipsel", &prop)) pdata->mask_chipsel = prop; if (!of_property_read_string(pdev->dev.of_node, - "nand-ecc-mode", &mode) || - !of_property_read_string(pdev->dev.of_node, "ti,davinci-ecc-mode", &mode)) { if (!strncmp("none", mode, 4)) pdata->ecc_mode = NAND_ECC_NONE; @@ -573,14 +570,11 @@ static struct davinci_nand_pdata "ti,davinci-ecc-bits", &prop)) pdata->ecc_bits = prop; - prop = of_get_nand_bus_width(pdev->dev.of_node); - if (0 < prop || !of_property_read_u32(pdev->dev.of_node, - "ti,davinci-nand-buswidth", &prop)) - if (prop == 16) - pdata->options |= NAND_BUSWIDTH_16; + if (!of_property_read_u32(pdev->dev.of_node, + "ti,davinci-nand-buswidth", &prop) && prop == 16) + pdata->options |= NAND_BUSWIDTH_16; + if (of_property_read_bool(pdev->dev.of_node, - "nand-on-flash-bbt") || - of_property_read_bool(pdev->dev.of_node, "ti,davinci-nand-use-bbt")) pdata->bbt_options = NAND_BBT_USE_FLASH; @@ -610,7 +604,6 @@ static int nand_davinci_probe(struct platform_device *pdev) void __iomem *base; int ret; uint32_t val; - nand_ecc_modes_t ecc_mode; struct mtd_info *mtd; pdata = nand_davinci_get_pdata(pdev); @@ -694,10 +687,41 @@ static int nand_davinci_probe(struct platform_device *pdev) info->chip.write_buf = nand_davinci_write_buf; /* Use board-specific ECC config */ - ecc_mode = pdata->ecc_mode; + info->chip.ecc.mode = pdata->ecc_mode; ret = -EINVAL; - switch (ecc_mode) { + + info->clk = devm_clk_get(&pdev->dev, "aemif"); + if (IS_ERR(info->clk)) { + ret = PTR_ERR(info->clk); + dev_dbg(&pdev->dev, "unable to get AEMIF clock, err %d\n", ret); + return ret; + } + + ret = clk_prepare_enable(info->clk); + if (ret < 0) { + dev_dbg(&pdev->dev, "unable to enable AEMIF clock, err %d\n", + ret); + goto err_clk_enable; + } + + spin_lock_irq(&davinci_nand_lock); + + /* put CSxNAND into NAND mode */ + val = davinci_nand_readl(info, NANDFCR_OFFSET); + val |= BIT(info->core_chipsel); + davinci_nand_writel(info, NANDFCR_OFFSET, val); + + spin_unlock_irq(&davinci_nand_lock); + + /* Scan to find existence of the device(s) */ + ret = nand_scan_ident(mtd, pdata->mask_chipsel ? 2 : 1, NULL); + if (ret < 0) { + dev_dbg(&pdev->dev, "no NAND chip(s) found\n"); + goto err; + } + + switch (info->chip.ecc.mode) { case NAND_ECC_NONE: case NAND_ECC_SOFT: pdata->ecc_bits = 0; @@ -736,37 +760,6 @@ static int nand_davinci_probe(struct platform_device *pdev) default: return -EINVAL; } - info->chip.ecc.mode = ecc_mode; - - info->clk = devm_clk_get(&pdev->dev, "aemif"); - if (IS_ERR(info->clk)) { - ret = PTR_ERR(info->clk); - dev_dbg(&pdev->dev, "unable to get AEMIF clock, err %d\n", ret); - return ret; - } - - ret = clk_prepare_enable(info->clk); - if (ret < 0) { - dev_dbg(&pdev->dev, "unable to enable AEMIF clock, err %d\n", - ret); - goto err_clk_enable; - } - - spin_lock_irq(&davinci_nand_lock); - - /* put CSxNAND into NAND mode */ - val = davinci_nand_readl(info, NANDFCR_OFFSET); - val |= BIT(info->core_chipsel); - davinci_nand_writel(info, NANDFCR_OFFSET, val); - - spin_unlock_irq(&davinci_nand_lock); - - /* Scan to find existence of the device(s) */ - ret = nand_scan_ident(mtd, pdata->mask_chipsel ? 2 : 1, NULL); - if (ret < 0) { - dev_dbg(&pdev->dev, "no NAND chip(s) found\n"); - goto err; - } /* Update ECC layout if needed ... for 1-bit HW ECC, the default * is OK, but it allocates 6 bytes when only 3 are needed (for @@ -820,7 +813,7 @@ err: err_clk_enable: spin_lock_irq(&davinci_nand_lock); - if (ecc_mode == NAND_ECC_HW_SYNDROME) + if (info->chip.ecc.mode == NAND_ECC_HW_SYNDROME) ecc4_busy = false; spin_unlock_irq(&davinci_nand_lock); return ret; -- 2.20.1