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>

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index e02d27a..03664d5 100644 (file)
--- 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;