debug lk

hc

2024-02-20 e636c8d336489bf3eed5878299e6cc045bbad077

 kernel/drivers/spi/spi-bcm63xx-hsspi.c
..
..
@@ -21,6 +21,7 @@
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21
 #include <linux/mutex.h>
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22
 #include <linux/of.h>
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 #include <linux/reset.h>
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+#include <linux/pm_runtime.h>
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25
 
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 #define HSSPI_GLOBAL_CTRL_REG			0x0
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 #define GLOBAL_CTRL_CS_POLARITY_SHIFT		0
..
..
@@ -162,6 +163,7 @@
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 	int step_size = HSSPI_BUFFER_LEN;
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 	const u8 *tx = t->tx_buf;
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 	u8 *rx = t->rx_buf;
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+	u32 val = 0;
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167
 
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 	bcm63xx_hsspi_set_clk(bs, spi, t->speed_hz);
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 	bcm63xx_hsspi_set_cs(bs, spi->chip_select, true);
..
..
@@ -177,11 +179,16 @@
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 		step_size -= HSSPI_OPCODE_LEN;
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180
 
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 	if ((opcode == HSSPI_OP_READ && t->rx_nbits == SPI_NBITS_DUAL) ||
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-	    (opcode == HSSPI_OP_WRITE && t->tx_nbits == SPI_NBITS_DUAL))
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+	    (opcode == HSSPI_OP_WRITE && t->tx_nbits == SPI_NBITS_DUAL)) {
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 		opcode |= HSSPI_OP_MULTIBIT;
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-	__raw_writel(1 << MODE_CTRL_MULTIDATA_WR_SIZE_SHIFT |
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-		     1 << MODE_CTRL_MULTIDATA_RD_SIZE_SHIFT | 0xff,
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+		if (t->rx_nbits == SPI_NBITS_DUAL)
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+			val |= 1 << MODE_CTRL_MULTIDATA_RD_SIZE_SHIFT;
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+		if (t->tx_nbits == SPI_NBITS_DUAL)
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+			val |= 1 << MODE_CTRL_MULTIDATA_WR_SIZE_SHIFT;
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+	}
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+
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+	__raw_writel(val | 0xff,
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 		     bs->regs + HSSPI_PROFILE_MODE_CTRL_REG(chip_select));
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193
 
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 	while (pending > 0) {
..
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@@ -439,13 +446,17 @@
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 	if (ret)
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 		goto out_put_master;
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448
 
449
+	pm_runtime_enable(&pdev->dev);
450
+
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 	/* register and we are done */
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 	ret = devm_spi_register_master(dev, master);
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 	if (ret)
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-		goto out_put_master;
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+		goto out_pm_disable;
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455
 
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 	return 0;
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457
 
458
+out_pm_disable:
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+	pm_runtime_disable(&pdev->dev);
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 out_put_master:
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 	spi_master_put(master);
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 out_disable_pll_clk: