From 5e05a2d695f920209991b7a097c2e4ad4d1cdf9e Mon Sep 17 00:00:00 2001 From: =?utf8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Mon, 23 Apr 2012 11:23:38 +0200 Subject: [PATCH] mtd: mxc_nand: split chip_select function and put it into devtype struct MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Signed-off-by: Uwe Kleine-König Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- drivers/mtd/nand/mxc_nand.c | 33 ++++++++++++++++++++++++++++----- 1 file changed, 28 insertions(+), 5 deletions(-) diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index e02d27a937c8..03664d5742d9 100644 --- a/drivers/mtd/nand/mxc_nand.c +++ b/drivers/mtd/nand/mxc_nand.c @@ -153,6 +153,7 @@ struct mxc_nand_devtype_data { void (*irq_control)(struct mxc_nand_host *, int); u32 (*get_ecc_status)(struct mxc_nand_host *); struct nand_ecclayout *ecclayout_512, *ecclayout_2k, *ecclayout_4k; + void (*select_chip)(struct mtd_info *mtd, int chip); }; struct mxc_nand_host { @@ -721,7 +722,7 @@ static int mxc_nand_verify_buf(struct mtd_info *mtd, /* This function is used by upper layer for select and * deselect of the NAND chip */ -static void mxc_nand_select_chip(struct mtd_info *mtd, int chip) +static void mxc_nand_select_chip_v1_v3(struct mtd_info *mtd, int chip) { struct nand_chip *nand_chip = mtd->priv; struct mxc_nand_host *host = nand_chip->priv; @@ -740,11 +741,30 @@ static void mxc_nand_select_chip(struct mtd_info *mtd, int chip) clk_enable(host->clk); host->clk_act = 1; } +} + +static void mxc_nand_select_chip_v2(struct mtd_info *mtd, int chip) +{ + struct nand_chip *nand_chip = mtd->priv; + struct mxc_nand_host *host = nand_chip->priv; + + if (chip == -1) { + /* Disable the NFC clock */ + if (host->clk_act) { + clk_disable(host->clk); + host->clk_act = 0; + } + return; + } - if (nfc_is_v21()) { - host->active_cs = chip; - writew(host->active_cs << 4, NFC_V1_V2_BUF_ADDR); + if (!host->clk_act) { + /* Enable the NFC clock */ + clk_enable(host->clk); + host->clk_act = 1; } + + host->active_cs = chip; + writew(host->active_cs << 4, NFC_V1_V2_BUF_ADDR); } /* @@ -1117,6 +1137,7 @@ static const struct mxc_nand_devtype_data imx21_nand_devtype_data = { .ecclayout_512 = &nandv1_hw_eccoob_smallpage, .ecclayout_2k = &nandv1_hw_eccoob_largepage, .ecclayout_4k = &nandv1_hw_eccoob_smallpage, /* XXX: needs fix */ + .select_chip = mxc_nand_select_chip_v1_v3, }; /* v21: i.MX25, i.MX35 */ @@ -1133,6 +1154,7 @@ static const struct mxc_nand_devtype_data imx25_nand_devtype_data = { .ecclayout_512 = &nandv2_hw_eccoob_smallpage, .ecclayout_2k = &nandv2_hw_eccoob_largepage, .ecclayout_4k = &nandv2_hw_eccoob_4k, + .select_chip = mxc_nand_select_chip_v2, }; /* v3: i.MX51, i.MX53 */ @@ -1149,6 +1171,7 @@ static const struct mxc_nand_devtype_data imx51_nand_devtype_data = { .ecclayout_512 = &nandv2_hw_eccoob_smallpage, .ecclayout_2k = &nandv2_hw_eccoob_largepage, .ecclayout_4k = &nandv2_hw_eccoob_smallpage, /* XXX: needs fix */ + .select_chip = mxc_nand_select_chip_v1_v3, }; static int __init mxcnd_probe(struct platform_device *pdev) @@ -1183,7 +1206,6 @@ static int __init mxcnd_probe(struct platform_device *pdev) this->priv = host; this->dev_ready = mxc_nand_dev_ready; this->cmdfunc = mxc_nand_command; - this->select_chip = mxc_nand_select_chip; this->read_byte = mxc_nand_read_byte; this->read_word = mxc_nand_read_word; this->write_buf = mxc_nand_write_buf; @@ -1246,6 +1268,7 @@ static int __init mxcnd_probe(struct platform_device *pdev) } else BUG(); + this->select_chip = host->devtype_data->select_chip; this->ecc.size = 512; this->ecc.layout = host->devtype_data->ecclayout_512; -- 2.20.1