Add Renesas PMIC RAA215300 and built-in RTC

Merge series from Biju Das <biju.das.jz@bp.renesas.com>:

This patch series aims to add support for Renesas PMIC RAA215300 and
built-in RTC found on this PMIC device.

The details of PMIC can be found here[1].

Renesas PMIC RAA215300 exposes two separate i2c devices, one for the main
device and another for rtc device.

6 files changed, 48 insertions, 23 deletions

diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
index 6ddb2dfc0f00..32449bef4415 100644
--- a/drivers/spi/spi-cadence-quadspi.c
+++ b/drivers/spi/spi-cadence-quadspi.c
@@ -1756,8 +1756,11 @@ static int cqspi_probe(struct platform_device *pdev)
 			cqspi->slow_sram = true;
 
 		if (of_device_is_compatible(pdev->dev.of_node,
-					    "xlnx,versal-ospi-1.0"))
-			dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
+					    "xlnx,versal-ospi-1.0")) {
+			ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
+			if (ret)
+				goto probe_reset_failed;
+		}
 	}
 
 	ret = devm_request_irq(dev, irq, cqspi_irq_handler, 0,
diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c
index 5f2aee69c1c1..15f5e9cb54ad 100644
--- a/drivers/spi/spi-dw-mmio.c
+++ b/drivers/spi/spi-dw-mmio.c
@@ -274,7 +274,7 @@ static void dw_spi_elba_set_cs(struct spi_device *spi, bool enable)
 	 */
 	spi_set_chipselect(spi, 0, 0);
 	dw_spi_set_cs(spi, enable);
-	spi_get_chipselect(spi, cs);
+	spi_set_chipselect(spi, 0, cs);
 }
 
 static int dw_spi_elba_init(struct platform_device *pdev,
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index 4339485d202c..674cfe05f411 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -1002,7 +1002,9 @@ static int dspi_transfer_one_message(struct spi_controller *ctlr,
 static int dspi_setup(struct spi_device *spi)
 {
 	struct fsl_dspi *dspi = spi_controller_get_devdata(spi->controller);
+	u32 period_ns = DIV_ROUND_UP(NSEC_PER_SEC, spi->max_speed_hz);
 	unsigned char br = 0, pbr = 0, pcssck = 0, cssck = 0;
+	u32 quarter_period_ns = DIV_ROUND_UP(period_ns, 4);
 	u32 cs_sck_delay = 0, sck_cs_delay = 0;
 	struct fsl_dspi_platform_data *pdata;
 	unsigned char pasc = 0, asc = 0;
@@ -1031,6 +1033,19 @@ static int dspi_setup(struct spi_device *spi)
 		sck_cs_delay = pdata->sck_cs_delay;
 	}
 
+	/* Since tCSC and tASC apply to continuous transfers too, avoid SCK
+	 * glitches of half a cycle by never allowing tCSC + tASC to go below
+	 * half a SCK period.
+	 */
+	if (cs_sck_delay < quarter_period_ns)
+		cs_sck_delay = quarter_period_ns;
+	if (sck_cs_delay < quarter_period_ns)
+		sck_cs_delay = quarter_period_ns;
+
+	dev_dbg(&spi->dev,
+		"DSPI controller timing params: CS-to-SCK delay %u ns, SCK-to-CS delay %u ns\n",
+		cs_sck_delay, sck_cs_delay);
+
 	clkrate = clk_get_rate(dspi->clk);
 	hz_to_spi_baud(&pbr, &br, spi->max_speed_hz, clkrate);
 
diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c
index f2341ab99556..4b70038ceb6b 100644
--- a/drivers/spi/spi-fsl-lpspi.c
+++ b/drivers/spi/spi-fsl-lpspi.c
@@ -910,9 +910,14 @@ static int fsl_lpspi_probe(struct platform_device *pdev)
 	ret = fsl_lpspi_dma_init(&pdev->dev, fsl_lpspi, controller);
 	if (ret == -EPROBE_DEFER)
 		goto out_pm_get;
-
 	if (ret < 0)
 		dev_err(&pdev->dev, "dma setup error %d, use pio\n", ret);
+	else
+		/*
+		 * disable LPSPI module IRQ when enable DMA mode successfully,
+		 * to prevent the unexpected LPSPI module IRQ events.
+		 */
+		disable_irq(irq);
 
 	ret = devm_spi_register_controller(&pdev->dev, controller);
 	if (ret < 0) {
diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 21c321f43766..d7432e2219d8 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -1275,6 +1275,9 @@ static int mtk_spi_remove(struct platform_device *pdev)
 	struct mtk_spi *mdata = spi_master_get_devdata(master);
 	int ret;
 
+	if (mdata->use_spimem && !completion_done(&mdata->spimem_done))
+		complete(&mdata->spimem_done);
+
 	ret = pm_runtime_resume_and_get(&pdev->dev);
 	if (ret < 0)
 		return ret;
diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 944ef6b42bce..00e5e88e72c4 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -1028,23 +1028,8 @@ static int spi_qup_probe(struct platform_device *pdev)
 		return -ENXIO;
 	}
 
-	ret = clk_prepare_enable(cclk);
-	if (ret) {
-		dev_err(dev, "cannot enable core clock\n");
-		return ret;
-	}
-
-	ret = clk_prepare_enable(iclk);
-	if (ret) {
-		clk_disable_unprepare(cclk);
-		dev_err(dev, "cannot enable iface clock\n");
-		return ret;
-	}
-
 	master = spi_alloc_master(dev, sizeof(struct spi_qup));
 	if (!master) {
-		clk_disable_unprepare(cclk);
-		clk_disable_unprepare(iclk);
 		dev_err(dev, "cannot allocate master\n");
 		return -ENOMEM;
 	}
@@ -1092,6 +1077,19 @@ static int spi_qup_probe(struct platform_device *pdev)
 	spin_lock_init(&controller->lock);
 	init_completion(&controller->done);
 
+	ret = clk_prepare_enable(cclk);
+	if (ret) {
+		dev_err(dev, "cannot enable core clock\n");
+		goto error_dma;
+	}
+
+	ret = clk_prepare_enable(iclk);
+	if (ret) {
+		clk_disable_unprepare(cclk);
+		dev_err(dev, "cannot enable iface clock\n");
+		goto error_dma;
+	}
+
 	iomode = readl_relaxed(base + QUP_IO_M_MODES);
 
 	size = QUP_IO_M_OUTPUT_BLOCK_SIZE(iomode);
@@ -1121,7 +1119,7 @@ static int spi_qup_probe(struct platform_device *pdev)
 	ret = spi_qup_set_state(controller, QUP_STATE_RESET);
 	if (ret) {
 		dev_err(dev, "cannot set RESET state\n");
-		goto error_dma;
+		goto error_clk;
 	}
 
 	writel_relaxed(0, base + QUP_OPERATIONAL);
@@ -1145,7 +1143,7 @@ static int spi_qup_probe(struct platform_device *pdev)
 	ret = devm_request_irq(dev, irq, spi_qup_qup_irq,
 			       IRQF_TRIGGER_HIGH, pdev->name, controller);
 	if (ret)
-		goto error_dma;
+		goto error_clk;
 
 	pm_runtime_set_autosuspend_delay(dev, MSEC_PER_SEC);
 	pm_runtime_use_autosuspend(dev);
@@ -1160,11 +1158,12 @@ static int spi_qup_probe(struct platform_device *pdev)
 
 disable_pm:
 	pm_runtime_disable(&pdev->dev);
+error_clk:
+	clk_disable_unprepare(cclk);
+	clk_disable_unprepare(iclk);
 error_dma:
 	spi_qup_release_dma(master);
 error:
-	clk_disable_unprepare(cclk);
-	clk_disable_unprepare(iclk);
 	spi_master_put(master);
 	return ret;
 }