diff options
| author |   AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> | 2025-03-25 12:07:01 +0100 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2025-05-14 16:59:16 +0200 |
| commit | b70721fd845d7be455fe2a6036b1afa660180a3b (patch) | |
| tree | d0ad70b4e308e6cfcbed0bccfbf3c133c31530fc | |
| parent | mmc: mtk-sd: Do single write in function msdc_new_tx_setting (diff) | |
| download | wireguard-linux-b70721fd845d7be455fe2a6036b1afa660180a3b.tar.xz wireguard-linux-b70721fd845d7be455fe2a6036b1afa660180a3b.zip | |
mmc: mtk-sd: Aggregate R/W for top_base iospace case where possible
In case the controller uses the top_base iospace, most register
read/writes can be changed from multiple RWs to a single read
and a single write.
Where possible, and where it makes sense, aggregate the multiple
reads and writes to just one.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20250325110701.52623-5-angelogioacchino.delregno@collabora.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/host/mtk-sd.c | 52 |
1 files changed, 28 insertions, 24 deletions
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index e9e84b9a65f0..ceeae1aeac94 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -1975,18 +1975,19 @@ static void msdc_init_hw(struct msdc_host *host) if (host->dev_comp->data_tune) { if (host->top_base) { - sdr_set_bits(host->top_base + EMMC_TOP_CONTROL, - PAD_DAT_RD_RXDLY_SEL); - sdr_clr_bits(host->top_base + EMMC_TOP_CONTROL, - DATA_K_VALUE_SEL); - sdr_set_bits(host->top_base + EMMC_TOP_CMD, - PAD_CMD_RD_RXDLY_SEL); + u32 top_ctl_val = readl(host->top_base + EMMC_TOP_CONTROL); + u32 top_cmd_val = readl(host->top_base + EMMC_TOP_CMD); + + top_cmd_val |= PAD_CMD_RD_RXDLY_SEL; + top_ctl_val |= PAD_DAT_RD_RXDLY_SEL; + top_ctl_val &= ~DATA_K_VALUE_SEL; if (host->tuning_step > PAD_DELAY_HALF) { - sdr_set_bits(host->top_base + EMMC_TOP_CONTROL, - PAD_DAT_RD_RXDLY2_SEL); - sdr_set_bits(host->top_base + EMMC_TOP_CMD, - PAD_CMD_RD_RXDLY2_SEL); + top_cmd_val |= PAD_CMD_RD_RXDLY2_SEL; + top_ctl_val |= PAD_DAT_RD_RXDLY2_SEL; } + + writel(top_ctl_val, host->top_base + EMMC_TOP_CONTROL); + writel(top_cmd_val, host->top_base + EMMC_TOP_CMD); } else { sdr_set_bits(host->base + tune_reg, MSDC_PAD_TUNE_RD_SEL | @@ -2196,15 +2197,17 @@ static inline void msdc_set_cmd_delay(struct msdc_host *host, u32 value) u32 tune_reg = host->dev_comp->pad_tune_reg; if (host->top_base) { + u32 regval = readl(host->top_base + EMMC_TOP_CMD); + + regval &= ~(PAD_CMD_RXDLY | PAD_CMD_RXDLY2); + if (value < PAD_DELAY_HALF) { - sdr_set_field(host->top_base + EMMC_TOP_CMD, PAD_CMD_RXDLY, value); - sdr_set_field(host->top_base + EMMC_TOP_CMD, PAD_CMD_RXDLY2, 0); + regval |= FIELD_PREP(PAD_CMD_RXDLY, value); } else { - sdr_set_field(host->top_base + EMMC_TOP_CMD, PAD_CMD_RXDLY, - PAD_DELAY_HALF - 1); - sdr_set_field(host->top_base + EMMC_TOP_CMD, PAD_CMD_RXDLY2, - value - PAD_DELAY_HALF); + regval |= FIELD_PREP(PAD_CMD_RXDLY, PAD_DELAY_HALF - 1); + regval |= FIELD_PREP(PAD_CMD_RXDLY2, value - PAD_DELAY_HALF); } + writel(regval, host->top_base + EMMC_TOP_CMD); } else { if (value < PAD_DELAY_HALF) { sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY, value); @@ -2224,17 +2227,18 @@ static inline void msdc_set_data_delay(struct msdc_host *host, u32 value) u32 tune_reg = host->dev_comp->pad_tune_reg; if (host->top_base) { + u32 regval = readl(host->top_base + EMMC_TOP_CONTROL); + + regval &= ~(PAD_DAT_RD_RXDLY | PAD_DAT_RD_RXDLY2); + if (value < PAD_DELAY_HALF) { - sdr_set_field(host->top_base + EMMC_TOP_CONTROL, - PAD_DAT_RD_RXDLY, value); - sdr_set_field(host->top_base + EMMC_TOP_CONTROL, - PAD_DAT_RD_RXDLY2, 0); + regval |= FIELD_PREP(PAD_DAT_RD_RXDLY, value); + regval |= FIELD_PREP(PAD_DAT_RD_RXDLY2, value); } else { - sdr_set_field(host->top_base + EMMC_TOP_CONTROL, - PAD_DAT_RD_RXDLY, PAD_DELAY_HALF - 1); - sdr_set_field(host->top_base + EMMC_TOP_CONTROL, - PAD_DAT_RD_RXDLY2, value - PAD_DELAY_HALF); + regval |= FIELD_PREP(PAD_DAT_RD_RXDLY, PAD_DELAY_HALF - 1); + regval |= FIELD_PREP(PAD_DAT_RD_RXDLY2, value - PAD_DELAY_HALF); } + writel(regval, host->top_base + EMMC_TOP_CONTROL); } else { if (value < PAD_DELAY_HALF) { sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_DATRRDLY, value); |