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[PATCHi v3 0/4] Fixup mediatek spi driver

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  [PATCHi v3 0/4] Fixup mediatek spi driver  Leilk Liu <leilk.liu@mediatek.com> - 2015-08-24 05:50 +0200
    [PATCH v3 2/4] spi: mediatek: replace int with u32, delete TAB and define MTK_SPI_PAUSE_INT_STATUS marco Leilk Liu <leilk.liu@mediatek.com> - 2015-08-24 05:50 +0200
      Re: [PATCH v3 2/4] spi: mediatek: replace int with u32, delete TAB  and define MTK_SPI_PAUSE_INT_STATUS marco Mark Brown <broonie@kernel.org> - 2015-08-25 19:50 +0200
    [PATCH v3 1/4] spi: mediatek: add linux/io.h include file Leilk Liu <leilk.liu@mediatek.com> - 2015-08-24 05:50 +0200
    [PATCH v3 3/4] spi: mediatek: add PM clk_prepare_enable fail flow Leilk Liu <leilk.liu@mediatek.com> - 2015-08-24 05:50 +0200

#1211756 — [PATCHi v3 0/4] Fixup mediatek spi driver

From: Leilk Liu <leilk.liu@mediatek.com>

This series are based on 4.2-rc1 and provide four patches to fix mediatek spi driver.

Change in v3:
1. The follow patches are applied, so remove them from series:
  - spi: mediatek: fix spi incorrect endian usage
  - spi: medaitek: revise quirks compatibility style
  - spi: mediatek: use BIT() to instead of SPI_CMD_*_OFFSET
2. The patch "spi: mediatek: revise coding style" title is not clear, so split it to four patches.

Change in v2:
1. The patch "spi: mediatek: remove redundant clock in prepare_hardware/unprepare_hardware" 
   is applied, so remove it from series.
2. fix incorrect endian usage to support little-endian and big-endian system.
3. revise quirks style to bool.
4. use BIT() to instead of SPI_CMD_*_OFFSET.
5. revise coding style, such as time name, and variable type. 

Leilk Liu (4):
  spi: mediatek: add linux/io.h include file
  spi: mediatek: replace int with u32, delete TAB and define
    MTK_SPI_PAUSE_INT_STATUS marco
  spi: mediatek: add PM clk_prepare_enable fail flow
  spi: mediatek: replace *_time name

 drivers/spi/spi-mt65xx.c | 52 ++++++++++++++++++++++++++++--------------------
 1 file changed, 30 insertions(+), 22 deletions(-)

--
1.8.1.1.dirty

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#1211758 — [PATCH v3 2/4] spi: mediatek: replace int with u32, delete TAB and define MTK_SPI_PAUSE_INT_STATUS marco

this patch replaces int with u32, deletes TAB, and defines
MTK_SPI_PAUSE_INT_STATUS marco.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
---
 drivers/spi/spi-mt65xx.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index fe4eda3..f81618c 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -67,6 +67,8 @@
 
 #define MT8173_SPI_MAX_PAD_SEL 3
 
+#define MTK_SPI_PAUSE_INT_STATUS 0x2
+
 #define MTK_SPI_IDLE 0
 #define MTK_SPI_PAUSED 1
 
@@ -179,7 +181,7 @@ static int mtk_spi_prepare_hardware(struct spi_master *master)
 
 	trans = list_first_entry(&msg->transfers, struct spi_transfer,
 				 transfer_list);
-	if (trans->cs_change == 0) {
+	if (!trans->cs_change) {
 		mdata->state = MTK_SPI_IDLE;
 		mtk_spi_reset(mdata);
 	}
@@ -269,11 +271,11 @@ static void mtk_spi_setup_packet(struct spi_master *master)
 	u32 packet_size, packet_loop, reg_val;
 	struct mtk_spi *mdata = spi_master_get_devdata(master);
 
-	packet_size = min_t(unsigned, mdata->xfer_len, MTK_SPI_PACKET_SIZE);
+	packet_size = min_t(u32, mdata->xfer_len, MTK_SPI_PACKET_SIZE);
 	packet_loop = mdata->xfer_len / packet_size;
 
 	reg_val = readl(mdata->base + SPI_CFG1_REG);
-	reg_val &= ~(SPI_CFG1_PACKET_LENGTH_MASK + SPI_CFG1_PACKET_LOOP_MASK);
+	reg_val &= ~(SPI_CFG1_PACKET_LENGTH_MASK | SPI_CFG1_PACKET_LOOP_MASK);
 	reg_val |= (packet_size - 1) << SPI_CFG1_PACKET_LENGTH_OFFSET;
 	reg_val |= (packet_loop - 1) << SPI_CFG1_PACKET_LOOP_OFFSET;
 	writel(reg_val, mdata->base + SPI_CFG1_REG);
@@ -281,7 +283,7 @@ static void mtk_spi_setup_packet(struct spi_master *master)
 
 static void mtk_spi_enable_transfer(struct spi_master *master)
 {
-	int cmd;
+	u32 cmd;
 	struct mtk_spi *mdata = spi_master_get_devdata(master);
 
 	cmd = readl(mdata->base + SPI_CMD_REG);
@@ -292,9 +294,9 @@ static void mtk_spi_enable_transfer(struct spi_master *master)
 	writel(cmd, mdata->base + SPI_CMD_REG);
 }
 
-static int mtk_spi_get_mult_delta(int xfer_len)
+static int mtk_spi_get_mult_delta(u32 xfer_len)
 {
-	int mult_delta;
+	u32 mult_delta;
 
 	if (xfer_len > MTK_SPI_PACKET_SIZE)
 		mult_delta = xfer_len % MTK_SPI_PACKET_SIZE;
@@ -435,7 +437,7 @@ static irqreturn_t mtk_spi_interrupt(int irq, void *dev_id)
 	struct spi_transfer *trans = mdata->cur_transfer;
 
 	reg_val = readl(mdata->base + SPI_STATUS0_REG);
-	if (reg_val & 0x2)
+	if (reg_val & MTK_SPI_PAUSE_INT_STATUS)
 		mdata->state = MTK_SPI_PAUSED;
 	else
 		mdata->state = MTK_SPI_IDLE;
@@ -498,7 +500,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
 	struct mtk_spi *mdata;
 	const struct of_device_id *of_id;
 	struct resource *res;
-	int	irq, ret;
+	int irq, ret;
 
 	master = spi_alloc_master(&pdev->dev, sizeof(*mdata));
 	if (!master) {
-- 
1.8.1.1.dirty

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#1213206 — Re: [PATCH v3 2/4] spi: mediatek: replace int with u32, delete TAB and define MTK_SPI_PAUSE_INT_STATUS marco

[Multipart message — attachments visible in raw view] — view raw

On Mon, Aug 24, 2015 at 11:45:16AM +0800, Leilk Liu wrote:

> this patch replaces int with u32, deletes TAB, and defines
> MTK_SPI_PAUSE_INT_STATUS marco.

You've listed three changes in one patch and they're not obviously
interrelated.  As has been said before one change per patch please :(

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#1211760 — [PATCH v3 1/4] spi: mediatek: add linux/io.h include file

mediatek spi driver uses readl/writel, so add linux/io.h,
even so it's implicitly imported by spi/spi.h

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
---
 drivers/spi/spi-mt65xx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 43c1dd5..fe4eda3 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -16,6 +16,7 @@
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/interrupt.h>
+#include <linux/io.h>
 #include <linux/ioport.h>
 #include <linux/module.h>
 #include <linux/of.h>
-- 
1.8.1.1.dirty

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#1211761 — [PATCH v3 3/4] spi: mediatek: add PM clk_prepare_enable fail flow

This patch adds PM clk_prepare_enable fail flow.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
---
 drivers/spi/spi-mt65xx.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index f81618c..e14f583 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -665,8 +665,10 @@ static int mtk_spi_resume(struct device *dev)
 
 	if (!pm_runtime_suspended(dev)) {
 		ret = clk_prepare_enable(mdata->spi_clk);
-		if (ret < 0)
+		if (ret < 0) {
+			dev_err(dev, "failed to enable spi_clk (%d)\n", ret);
 			return ret;
+		}
 	}
 
 	ret = spi_master_resume(master);
@@ -692,8 +694,15 @@ static int mtk_spi_runtime_resume(struct device *dev)
 {
 	struct spi_master *master = dev_get_drvdata(dev);
 	struct mtk_spi *mdata = spi_master_get_devdata(master);
+	int ret;
+
+	ret = clk_prepare_enable(mdata->spi_clk);
+	if (ret < 0) {
+		dev_err(dev, "failed to enable spi_clk (%d)\n", ret);
+		return ret;
+	}
 
-	return clk_prepare_enable(mdata->spi_clk);
+	return 0;
 }
 #endif /* CONFIG_PM */
 
-- 
1.8.1.1.dirty

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