spi: omap2-mcspi: raw read and write endian fix

All OMAP IP blocks expect LE data, but CPU may operate in BE mode.
Need to use endian neutral functions to read/write h/w registers.
I.e instead of __raw_read[lw] and __raw_write[lw] functions code
need to use read[lw]_relaxed and write[lw]_relaxed functions.
If the first simply reads/writes register, the second will byteswap
it if host operates in BE mode.

Changes are trivial sed like replacement of __raw_xxx functions
with xxx_relaxed variant.

Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Signed-off-by: Taras Kondratiuk <taras.kondratiuk@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
index 443df39840bc899fb3525dcb141ed82da87d72f4..a72127f08e39faa04d1433094590094ea1ac357d 100644 (file)
--- a/drivers/spi/spi-omap2-mcspi.c
+++ b/drivers/spi/spi-omap2-mcspi.c
@@ -157,14 +157,14 @@ static inline void mcspi_write_reg(struct spi_master *master,
 {
        struct omap2_mcspi *mcspi = spi_master_get_devdata(master);
 
-       __raw_writel(val, mcspi->base + idx);
+       writel_relaxed(val, mcspi->base + idx);
 }
 
 static inline u32 mcspi_read_reg(struct spi_master *master, int idx)
 {
        struct omap2_mcspi *mcspi = spi_master_get_devdata(master);
 
-       return __raw_readl(mcspi->base + idx);
+       return readl_relaxed(mcspi->base + idx);
 }
 
 static inline void mcspi_write_cs_reg(const struct spi_device *spi,
@@ -172,14 +172,14 @@ static inline void mcspi_write_cs_reg(const struct spi_device *spi,
 {
        struct omap2_mcspi_cs   *cs = spi->controller_state;
 
-       __raw_writel(val, cs->base +  idx);
+       writel_relaxed(val, cs->base +  idx);
 }
 
 static inline u32 mcspi_read_cs_reg(const struct spi_device *spi, int idx)
 {
        struct omap2_mcspi_cs   *cs = spi->controller_state;
 
-       return __raw_readl(cs->base + idx);
+       return readl_relaxed(cs->base + idx);
 }
 
 static inline u32 mcspi_cached_chconf0(const struct spi_device *spi)
@@ -338,7 +338,7 @@ static void omap2_mcspi_restore_ctx(struct omap2_mcspi *mcspi)
        mcspi_write_reg(spi_cntrl, OMAP2_MCSPI_WAKEUPENABLE, ctx->wakeupenable);
 
        list_for_each_entry(cs, &ctx->cs, node)
-               __raw_writel(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0);
+               writel_relaxed(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0);
 }
 
 static int mcspi_wait_for_reg_bit(void __iomem *reg, unsigned long bit)
@@ -346,9 +346,9 @@ static int mcspi_wait_for_reg_bit(void __iomem *reg, unsigned long bit)
        unsigned long timeout;
 
        timeout = jiffies + msecs_to_jiffies(1000);
-       while (!(__raw_readl(reg) & bit)) {
+       while (!(readl_relaxed(reg) & bit)) {
                if (time_after(jiffies, timeout)) {
-                       if (!(__raw_readl(reg) & bit))
+                       if (!(readl_relaxed(reg) & bit))
                                return -ETIMEDOUT;
                        else
                                return 0;
@@ -675,7 +675,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
                                }
                                dev_vdbg(&spi->dev, "write-%d %02x\n",
                                                word_len, *tx);
-                               __raw_writel(*tx++, tx_reg);
+                               writel_relaxed(*tx++, tx_reg);
                        }
                        if (rx != NULL) {
                                if (mcspi_wait_for_reg_bit(chstat_reg,
@@ -687,7 +687,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
                                if (c == 1 && tx == NULL &&
                                    (l & OMAP2_MCSPI_CHCONF_TURBO)) {
                                        omap2_mcspi_set_enable(spi, 0);
-                                       *rx++ = __raw_readl(rx_reg);
+                                       *rx++ = readl_relaxed(rx_reg);
                                        dev_vdbg(&spi->dev, "read-%d %02x\n",
                                                    word_len, *(rx - 1));
                                        if (mcspi_wait_for_reg_bit(chstat_reg,
@@ -701,7 +701,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
                                        omap2_mcspi_set_enable(spi, 0);
                                }
 
-                               *rx++ = __raw_readl(rx_reg);
+                               *rx++ = readl_relaxed(rx_reg);
                                dev_vdbg(&spi->dev, "read-%d %02x\n",
                                                word_len, *(rx - 1));
                        }
@@ -722,7 +722,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
                                }
                                dev_vdbg(&spi->dev, "write-%d %04x\n",
                                                word_len, *tx);
-                               __raw_writel(*tx++, tx_reg);
+                               writel_relaxed(*tx++, tx_reg);
                        }
                        if (rx != NULL) {
                                if (mcspi_wait_for_reg_bit(chstat_reg,
@@ -734,7 +734,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
                                if (c == 2 && tx == NULL &&
                                    (l & OMAP2_MCSPI_CHCONF_TURBO)) {
                                        omap2_mcspi_set_enable(spi, 0);
-                                       *rx++ = __raw_readl(rx_reg);
+                                       *rx++ = readl_relaxed(rx_reg);
                                        dev_vdbg(&spi->dev, "read-%d %04x\n",
                                                    word_len, *(rx - 1));
                                        if (mcspi_wait_for_reg_bit(chstat_reg,
@@ -748,7 +748,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
                                        omap2_mcspi_set_enable(spi, 0);
                                }
 
-                               *rx++ = __raw_readl(rx_reg);
+                               *rx++ = readl_relaxed(rx_reg);
                                dev_vdbg(&spi->dev, "read-%d %04x\n",
                                                word_len, *(rx - 1));
                        }
@@ -769,7 +769,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
                                }
                                dev_vdbg(&spi->dev, "write-%d %08x\n",
                                                word_len, *tx);
-                               __raw_writel(*tx++, tx_reg);
+                               writel_relaxed(*tx++, tx_reg);
                        }
                        if (rx != NULL) {
                                if (mcspi_wait_for_reg_bit(chstat_reg,
@@ -781,7 +781,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
                                if (c == 4 && tx == NULL &&
                                    (l & OMAP2_MCSPI_CHCONF_TURBO)) {
                                        omap2_mcspi_set_enable(spi, 0);
-                                       *rx++ = __raw_readl(rx_reg);
+                                       *rx++ = readl_relaxed(rx_reg);
                                        dev_vdbg(&spi->dev, "read-%d %08x\n",
                                                    word_len, *(rx - 1));
                                        if (mcspi_wait_for_reg_bit(chstat_reg,
@@ -795,7 +795,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
                                        omap2_mcspi_set_enable(spi, 0);
                                }
 
-                               *rx++ = __raw_readl(rx_reg);
+                               *rx++ = readl_relaxed(rx_reg);
                                dev_vdbg(&spi->dev, "read-%d %08x\n",
                                                word_len, *(rx - 1));
                        }
@@ -1107,7 +1107,7 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
 
                        /* RX_ONLY mode needs dummy data in TX reg */
                        if (t->tx_buf == NULL)
-                               __raw_writel(0, cs->base
+                               writel_relaxed(0, cs->base
                                                + OMAP2_MCSPI_TX0);
 
                        if ((mcspi_dma->dma_rx && mcspi_dma->dma_tx) &&
@@ -1470,9 +1470,9 @@ static int omap2_mcspi_resume(struct device *dev)
                         * change in account.
                         */
                        cs->chconf0 |= OMAP2_MCSPI_CHCONF_FORCE;
-                       __raw_writel(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0);
+                       writel_relaxed(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0);
                        cs->chconf0 &= ~OMAP2_MCSPI_CHCONF_FORCE;
-                       __raw_writel(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0);
+                       writel_relaxed(cs->chconf0, cs->base + OMAP2_MCSPI_CHCONF0);
                }
        }
        pm_runtime_mark_last_busy(mcspi->dev);