UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

mtd: rawnand: fsmc: Stop implementing ->select_chip() 

Now that the CS line to assert is directly passed through the
nand_operation struct we can replace the fsmc_select_chip()
implementation by an internal fsmc_ce_ctrl() function which is
directly called from fsmc_exec_op()

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Boris Brezillon 2018-11-11 08:55:17 +01:00 committed by Miquel Raynal
parent 02b4a52604
commit 550b9fc4e3
1 changed files with 12 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/mtd/nand/raw/fsmc_nand.c
View File

@ -609,22 +609,19 @@ static void fsmc_write_buf_dma(struct mtd_info *mtd, const uint8_t *buf,
}
/* fsmc_select_chip - assert or deassert nCE */
static void fsmc_select_chip(struct nand_chip *chip, int chipnr)
static void fsmc_ce_ctrl(struct fsmc_nand_data *host, bool assert)
{
struct fsmc_nand_data *host = mtd_to_fsmc(nand_to_mtd(chip));
u32 pc;
u32 pc = readl(host->regs_va + FSMC_PC);
/* Support only one CS */
if (chipnr > 0)
return;
pc = readl(host->regs_va + FSMC_PC);
if (chipnr < 0)
if (!assert)
writel_relaxed(pc & ~FSMC_ENABLE, host->regs_va + FSMC_PC);
else
writel_relaxed(pc | FSMC_ENABLE, host->regs_va + FSMC_PC);
/* nCE line must be asserted before starting any operation */
/*
* nCE line changes must be applied before returning from this
* function.
*/
mb();
}
@ -645,6 +642,9 @@ static int fsmc_exec_op(struct nand_chip *chip, const struct nand_operation *op,
int i;
pr_debug("Executing operation [%d instructions]:\n", op->ninstrs);
fsmc_ce_ctrl(host, true);
for (op_id = 0; op_id < op->ninstrs; op_id++) {
instr = &op->instrs[op_id];
@ -701,6 +701,8 @@ static int fsmc_exec_op(struct nand_chip *chip, const struct nand_operation *op,
}
}
fsmc_ce_ctrl(host, false);
return ret;
}
@ -1081,7 +1083,6 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
mtd->dev.parent = &pdev->dev;
nand->exec_op = fsmc_exec_op;
nand->select_chip = fsmc_select_chip;
/*
* Setup default ECC mode. nand_dt_init() called from nand_scan_ident()