diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2012-04-23 09:23:38 (GMT) |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2012-05-14 04:02:37 (GMT) |
| commit | 5e05a2d695f920209991b7a097c2e4ad4d1cdf9e (patch) | |
| tree | 935b01fc2b7f4b68bf472d34f8a4625dc5a85794 /drivers/mtd | |
| parent | 6dcdf99dfab15bebf71ae66ed04cdce05b20779c (diff) | |
| download | linux-5e05a2d695f920209991b7a097c2e4ad4d1cdf9e.tar.xz | |
mtd: mxc_nand: split chip_select function and put it into devtype struct
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/mxc_nand.c | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index e02d27a..03664d5 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; |