[PATCH 11/15] mtd: rawnand: tegra: Stop implementing ->select_chip()

Boris Brezillon
2018-10-23T18:51:14Z

Now that the CS to be selected is kept in chip->cur_cs and passed
in nand_operation->cs, we can get rid of the ->select_chip()
implementation and replace it by an internal function which is called
from the chip->exec_op() and chip->ecc.read/write_xxx() hooks.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
---
drivers/mtd/nand/raw/tegra_nand.c | 28 ++++++++++++----------------
1 file changed, 12 insertions(+), 16 deletions(-)

diff --git a/drivers/mtd/nand/raw/tegra_nand.c b/drivers/mtd/nand/raw/tegra_nand.c
index 9767e29d74e2..590393d93ffc 100644
--- a/drivers/mtd/nand/raw/tegra_nand.c
+++ b/drivers/mtd/nand/raw/tegra_nand.c
@@ -454,29 +454,24 @@ static const struct nand_op_parser tegra_nand_op_parser = NAND_OP_PARSER(
NAND_OP_PARSER_PAT_DATA_IN_ELEM(true, 4)),
);

+static void tegra_nand_select_target(struct nand_chip *chip,
+ unsigned int die_nr)
+{
+ struct tegra_nand_chip *nand = to_tegra_chip(chip);
+ struct tegra_nand_controller *ctrl = to_tegra_ctrl(chip->controller);
+
+ ctrl->cur_cs = nand->cs[die_nr];
+}
+
static int tegra_nand_exec_op(struct nand_chip *chip,
const struct nand_operation *op,
bool check_only)
{
+ tegra_nand_select_target(chip, op->cs);
return nand_op_parser_exec_op(chip, &tegra_nand_op_parser, op,
check_only);
}

-static void tegra_nand_select_chip(struct nand_chip *chip, int die_nr)
-{
- struct tegra_nand_chip *nand = to_tegra_chip(chip);
- struct tegra_nand_controller *ctrl = to_tegra_ctrl(chip->controller);
-
- WARN_ON(die_nr >= (int)ARRAY_SIZE(nand->cs));
-
- if (die_nr < 0 || die_nr > 0) {
- ctrl->cur_cs = -1;
- return;
- }
-
- ctrl->cur_cs = nand->cs[die_nr];
-}
-
static void tegra_nand_hw_ecc(struct tegra_nand_controller *ctrl,
struct nand_chip *chip, bool enable)
{
@@ -503,6 +498,8 @@ static int tegra_nand_page_xfer(struct mtd_info *mtd, struct nand_chip *chip,
u32 addr1, cmd, dma_ctrl;
int ret;

+ tegra_nand_select_target(chip, chip->cur_cs);
+
if (read) {
writel_relaxed(NAND_CMD_READ0, ctrl->regs + CMD_REG1);
writel_relaxed(NAND_CMD_READSTART, ctrl->regs + CMD_REG2);
@@ -1116,7 +1113,6 @@ static int tegra_nand_chips_init(struct device *dev,

chip->options = NAND_NO_SUBPAGE_WRITE | NAND_USE_BOUNCE_BUFFER;
chip->exec_op = tegra_nand_exec_op;
- chip->select_chip = tegra_nand_select_chip;
chip->setup_data_interface = tegra_nand_setup_data_interface;

ret = nand_scan(chip, 1);
--
2.17.1