From f2eed8caa336e31d672804a8725dadba0415f19d Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Fri, 23 Apr 2021 21:24:28 +0300 Subject: [PATCH 1/6] spi: pxa2xx: Use one point of return when ->probe() fails When we can't allocate SPI controller, jump to the error path rather than return locally. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20210423182441.50272-2-andriy.shevchenko@linux.intel.com Signed-off-by: Mark Brown --- drivers/spi/spi-pxa2xx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index 5e59ba075bc7..2f5618883ac3 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -1705,8 +1705,8 @@ static int pxa2xx_spi_probe(struct platform_device *pdev) if (!controller) { dev_err(&pdev->dev, "cannot alloc spi_controller\n"); - pxa_ssp_free(ssp); - return -ENOMEM; + status = -ENOMEM; + goto out_error_controller_alloc; } drv_data = spi_controller_get_devdata(controller); drv_data->controller = controller; From 9e43c9a8d5de4810ea9688519d55b5e46784d84a Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Fri, 23 Apr 2021 21:24:29 +0300 Subject: [PATCH 2/6] spi: pxa2xx: Utilize MMIO and physical base from struct ssp_device We have a duplication of MMIO and physical base addresses in the struct driver_data, get rid of it and reuse members from struct ssp_device instead. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20210423182441.50272-3-andriy.shevchenko@linux.intel.com Signed-off-by: Mark Brown --- drivers/spi/spi-pxa2xx-dma.c | 4 ++-- drivers/spi/spi-pxa2xx.c | 4 +--- drivers/spi/spi-pxa2xx.h | 14 ++++---------- 3 files changed, 7 insertions(+), 15 deletions(-) diff --git a/drivers/spi/spi-pxa2xx-dma.c b/drivers/spi/spi-pxa2xx-dma.c index 37567bc7a523..3b27f356a18f 100644 --- a/drivers/spi/spi-pxa2xx-dma.c +++ b/drivers/spi/spi-pxa2xx-dma.c @@ -94,14 +94,14 @@ pxa2xx_spi_dma_prepare_one(struct driver_data *drv_data, cfg.direction = dir; if (dir == DMA_MEM_TO_DEV) { - cfg.dst_addr = drv_data->ssdr_physical; + cfg.dst_addr = drv_data->ssp->phys_base + SSDR; cfg.dst_addr_width = width; cfg.dst_maxburst = chip->dma_burst_size; sgt = &xfer->tx_sg; chan = drv_data->controller->dma_tx; } else { - cfg.src_addr = drv_data->ssdr_physical; + cfg.src_addr = drv_data->ssp->phys_base + SSDR; cfg.src_addr_width = width; cfg.src_maxburst = chip->dma_burst_size; diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index 2f5618883ac3..d89db682179d 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -325,7 +325,7 @@ static void lpss_ssp_setup(struct driver_data *drv_data) u32 value; config = lpss_get_config(drv_data); - drv_data->lpss_base = drv_data->ioaddr + config->offset; + drv_data->lpss_base = drv_data->ssp->mmio_base + config->offset; /* Enable software chip select control */ value = __lpss_ssp_read_priv(drv_data, config->reg_cs_ctrl); @@ -1733,8 +1733,6 @@ static int pxa2xx_spi_probe(struct platform_device *pdev) drv_data->ssp_type = ssp->type; - drv_data->ioaddr = ssp->mmio_base; - drv_data->ssdr_physical = ssp->phys_base + SSDR; if (pxa25x_ssp_comp(drv_data)) { switch (drv_data->ssp_type) { case QUARK_X1000_SSP: diff --git a/drivers/spi/spi-pxa2xx.h b/drivers/spi/spi-pxa2xx.h index 1400472bc986..ad9980ebefa6 100644 --- a/drivers/spi/spi-pxa2xx.h +++ b/drivers/spi/spi-pxa2xx.h @@ -33,10 +33,6 @@ struct driver_data { /* PXA hookup */ struct pxa2xx_spi_controller *controller_info; - /* SSP register addresses */ - void __iomem *ioaddr; - phys_addr_t ssdr_physical; - /* SSP masks*/ u32 dma_cr1; u32 int_cr1; @@ -87,16 +83,14 @@ struct chip_data { void (*cs_control)(u32 command); }; -static inline u32 pxa2xx_spi_read(const struct driver_data *drv_data, - unsigned reg) +static inline u32 pxa2xx_spi_read(const struct driver_data *drv_data, u32 reg) { - return __raw_readl(drv_data->ioaddr + reg); + return pxa_ssp_read_reg(drv_data->ssp, reg); } -static inline void pxa2xx_spi_write(const struct driver_data *drv_data, - unsigned reg, u32 val) +static inline void pxa2xx_spi_write(const struct driver_data *drv_data, u32 reg, u32 val) { - __raw_writel(val, drv_data->ioaddr + reg); + pxa_ssp_write_reg(drv_data->ssp, reg, val); } #define DMA_ALIGNMENT 8 From c3dce24c40cc7cd07deca5b81b763eae66f30856 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Fri, 23 Apr 2021 21:24:30 +0300 Subject: [PATCH 3/6] spi: pxa2xx: Utilize struct device from struct ssp_device We have a duplication of struct device in the struct driver_data, get rid of it and reuse member from struct ssp_device instead. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20210423182441.50272-4-andriy.shevchenko@linux.intel.com Signed-off-by: Mark Brown --- drivers/spi/spi-pxa2xx-dma.c | 12 +++++------- drivers/spi/spi-pxa2xx-pci.c | 1 + drivers/spi/spi-pxa2xx.c | 12 +++++------- drivers/spi/spi-pxa2xx.h | 4 ---- 4 files changed, 11 insertions(+), 18 deletions(-) diff --git a/drivers/spi/spi-pxa2xx-dma.c b/drivers/spi/spi-pxa2xx-dma.c index 3b27f356a18f..2e4a49567146 100644 --- a/drivers/spi/spi-pxa2xx-dma.c +++ b/drivers/spi/spi-pxa2xx-dma.c @@ -111,7 +111,7 @@ pxa2xx_spi_dma_prepare_one(struct driver_data *drv_data, ret = dmaengine_slave_config(chan, &cfg); if (ret) { - dev_warn(&drv_data->pdev->dev, "DMA slave config failed\n"); + dev_warn(drv_data->ssp->dev, "DMA slave config failed\n"); return NULL; } @@ -125,7 +125,7 @@ irqreturn_t pxa2xx_spi_dma_transfer(struct driver_data *drv_data) status = pxa2xx_spi_read(drv_data, SSSR) & drv_data->mask_sr; if (status & SSSR_ROR) { - dev_err(&drv_data->pdev->dev, "FIFO overrun\n"); + dev_err(drv_data->ssp->dev, "FIFO overrun\n"); dmaengine_terminate_async(drv_data->controller->dma_rx); dmaengine_terminate_async(drv_data->controller->dma_tx); @@ -145,16 +145,14 @@ int pxa2xx_spi_dma_prepare(struct driver_data *drv_data, tx_desc = pxa2xx_spi_dma_prepare_one(drv_data, DMA_MEM_TO_DEV, xfer); if (!tx_desc) { - dev_err(&drv_data->pdev->dev, - "failed to get DMA TX descriptor\n"); + dev_err(drv_data->ssp->dev, "failed to get DMA TX descriptor\n"); err = -EBUSY; goto err_tx; } rx_desc = pxa2xx_spi_dma_prepare_one(drv_data, DMA_DEV_TO_MEM, xfer); if (!rx_desc) { - dev_err(&drv_data->pdev->dev, - "failed to get DMA RX descriptor\n"); + dev_err(drv_data->ssp->dev, "failed to get DMA RX descriptor\n"); err = -EBUSY; goto err_rx; } @@ -191,8 +189,8 @@ void pxa2xx_spi_dma_stop(struct driver_data *drv_data) int pxa2xx_spi_dma_setup(struct driver_data *drv_data) { struct pxa2xx_spi_controller *pdata = drv_data->controller_info; - struct device *dev = &drv_data->pdev->dev; struct spi_controller *controller = drv_data->controller; + struct device *dev = drv_data->ssp->dev; dma_cap_mask_t mask; dma_cap_zero(mask); diff --git a/drivers/spi/spi-pxa2xx-pci.c b/drivers/spi/spi-pxa2xx-pci.c index 1833f5876e9f..f588fad77fc0 100644 --- a/drivers/spi/spi-pxa2xx-pci.c +++ b/drivers/spi/spi-pxa2xx-pci.c @@ -239,6 +239,7 @@ static int pxa2xx_spi_pci_probe(struct pci_dev *dev, spi_pdata.dma_burst_size = c->dma_burst_size ? c->dma_burst_size : 1; ssp = &spi_pdata.ssp; + ssp->dev = &dev->dev; ssp->phys_base = pci_resource_start(dev, 0); ssp->mmio_base = pcim_iomap_table(dev)[0]; ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn; diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index d89db682179d..0f3f7d725937 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -628,7 +628,7 @@ static void int_error_stop(struct driver_data *drv_data, const char *msg) pxa2xx_spi_flush(drv_data); pxa2xx_spi_off(drv_data); - dev_err(&drv_data->pdev->dev, "%s\n", msg); + dev_err(drv_data->ssp->dev, "%s\n", msg); drv_data->controller->cur_msg->status = -EIO; spi_finalize_current_transfer(drv_data->controller); @@ -731,8 +731,7 @@ static void handle_bad_msg(struct driver_data *drv_data) pxa2xx_spi_write(drv_data, SSTO, 0); write_SSSR_CS(drv_data, drv_data->clear_sr); - dev_err(&drv_data->pdev->dev, - "bad message state in interrupt handler\n"); + dev_err(drv_data->ssp->dev, "bad message state in interrupt handler\n"); } static irqreturn_t ssp_int(int irq, void *dev_id) @@ -748,7 +747,7 @@ static irqreturn_t ssp_int(int irq, void *dev_id) * the IRQ was not for us (we shouldn't be RPM suspended when the * interrupt is enabled). */ - if (pm_runtime_suspended(&drv_data->pdev->dev)) + if (pm_runtime_suspended(drv_data->ssp->dev)) return IRQ_NONE; /* @@ -1158,7 +1157,7 @@ static int pxa2xx_spi_slave_abort(struct spi_controller *controller) pxa2xx_spi_flush(drv_data); pxa2xx_spi_off(drv_data); - dev_dbg(&drv_data->pdev->dev, "transfer aborted\n"); + dev_dbg(drv_data->ssp->dev, "transfer aborted\n"); drv_data->controller->cur_msg->status = -EINTR; spi_finalize_current_transfer(drv_data->controller); @@ -1645,7 +1644,7 @@ static int pxa2xx_spi_fw_translate_cs(struct spi_controller *controller, { struct driver_data *drv_data = spi_controller_get_devdata(controller); - if (has_acpi_companion(&drv_data->pdev->dev)) { + if (has_acpi_companion(drv_data->ssp->dev)) { switch (drv_data->ssp_type) { /* * For Atoms the ACPI DeviceSelection used by the Windows @@ -1711,7 +1710,6 @@ static int pxa2xx_spi_probe(struct platform_device *pdev) drv_data = spi_controller_get_devdata(controller); drv_data->controller = controller; drv_data->controller_info = platform_info; - drv_data->pdev = pdev; drv_data->ssp = ssp; controller->dev.of_node = pdev->dev.of_node; diff --git a/drivers/spi/spi-pxa2xx.h b/drivers/spi/spi-pxa2xx.h index ad9980ebefa6..6724d7e056ce 100644 --- a/drivers/spi/spi-pxa2xx.h +++ b/drivers/spi/spi-pxa2xx.h @@ -12,7 +12,6 @@ #include #include #include -#include #include #include #include @@ -20,9 +19,6 @@ #include struct driver_data { - /* Driver model hookup */ - struct platform_device *pdev; - /* SSP Info */ struct ssp_device *ssp; From 0e4768713e71dd224633fd7e00ad358bc48f433a Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Fri, 23 Apr 2021 21:24:31 +0300 Subject: [PATCH 4/6] spi: pxa2xx: Replace header inclusions by forward declarations When the data structure is only referred by pointer, compiler may not need to see the contents of the data type. Thus, we may replace header inclusions by respective forward declarations. Due to above add missed headers as well. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20210423182441.50272-5-andriy.shevchenko@linux.intel.com Signed-off-by: Mark Brown --- drivers/spi/spi-pxa2xx-dma.c | 4 ++-- drivers/spi/spi-pxa2xx-pci.c | 1 + drivers/spi/spi-pxa2xx.c | 2 ++ drivers/spi/spi-pxa2xx.h | 18 ++++++++++-------- include/linux/spi/pxa2xx_spi.h | 2 ++ 5 files changed, 17 insertions(+), 10 deletions(-) diff --git a/drivers/spi/spi-pxa2xx-dma.c b/drivers/spi/spi-pxa2xx-dma.c index 2e4a49567146..e00dbadd39ec 100644 --- a/drivers/spi/spi-pxa2xx-dma.c +++ b/drivers/spi/spi-pxa2xx-dma.c @@ -9,11 +9,11 @@ #include #include #include -#include #include #include -#include + #include +#include #include "spi-pxa2xx.h" diff --git a/drivers/spi/spi-pxa2xx-pci.c b/drivers/spi/spi-pxa2xx-pci.c index f588fad77fc0..a259be12d326 100644 --- a/drivers/spi/spi-pxa2xx-pci.c +++ b/drivers/spi/spi-pxa2xx-pci.c @@ -8,6 +8,7 @@ #include #include #include + #include #include diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index 0f3f7d725937..1d4c7f4217ed 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -25,6 +26,7 @@ #include #include #include + #include #include diff --git a/drivers/spi/spi-pxa2xx.h b/drivers/spi/spi-pxa2xx.h index 6724d7e056ce..739e264feaa6 100644 --- a/drivers/spi/spi-pxa2xx.h +++ b/drivers/spi/spi-pxa2xx.h @@ -7,16 +7,18 @@ #ifndef SPI_PXA2XX_H #define SPI_PXA2XX_H -#include -#include -#include -#include #include -#include -#include +#include +#include #include -#include -#include + +#include + +struct gpio_desc; +struct pxa2xx_spi_controller; +struct spi_controller; +struct spi_device; +struct spi_transfer; struct driver_data { /* SSP Info */ diff --git a/include/linux/spi/pxa2xx_spi.h b/include/linux/spi/pxa2xx_spi.h index 31f00c7f4f59..1e0e2f136319 100644 --- a/include/linux/spi/pxa2xx_spi.h +++ b/include/linux/spi/pxa2xx_spi.h @@ -5,6 +5,8 @@ #ifndef __linux_pxa2xx_spi_h #define __linux_pxa2xx_spi_h +#include + #include #define PXA2XX_CS_ASSERT (0x01) From 5edc24901f4d469f8fc943004f73655933e89dbf Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Fri, 23 Apr 2021 21:24:32 +0300 Subject: [PATCH 5/6] spi: pxa2xx: Unify ifdeffery used in the headers The two headers have quite different ifdeffery to prevent multiple inclusion. Unify them with the pattern that in particular reflects their location. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20210423182441.50272-6-andriy.shevchenko@linux.intel.com Signed-off-by: Mark Brown --- include/linux/pxa2xx_ssp.h | 6 +++--- include/linux/spi/pxa2xx_spi.h | 7 ++++--- 2 files changed, 7 insertions(+), 6 deletions(-) diff --git a/include/linux/pxa2xx_ssp.h b/include/linux/pxa2xx_ssp.h index 7f73b26ed22e..14b049840faf 100644 --- a/include/linux/pxa2xx_ssp.h +++ b/include/linux/pxa2xx_ssp.h @@ -11,8 +11,8 @@ * PXA3xx SSP1, SSP2, SSP3, SSP4 */ -#ifndef __LINUX_SSP_H -#define __LINUX_SSP_H +#ifndef __LINUX_PXA2XX_SSP_H +#define __LINUX_PXA2XX_SSP_H #include #include @@ -270,4 +270,4 @@ static inline struct ssp_device *pxa_ssp_request_of(const struct device_node *n, static inline void pxa_ssp_free(struct ssp_device *ssp) {} #endif -#endif +#endif /* __LINUX_PXA2XX_SSP_H */ diff --git a/include/linux/spi/pxa2xx_spi.h b/include/linux/spi/pxa2xx_spi.h index 1e0e2f136319..12ef04d0896d 100644 --- a/include/linux/spi/pxa2xx_spi.h +++ b/include/linux/spi/pxa2xx_spi.h @@ -2,8 +2,8 @@ /* * Copyright (C) 2005 Stephen Street / StreetFire Sound Labs */ -#ifndef __linux_pxa2xx_spi_h -#define __linux_pxa2xx_spi_h +#ifndef __LINUX_SPI_PXA2XX_SPI_H +#define __LINUX_SPI_PXA2XX_SPI_H #include @@ -51,4 +51,5 @@ struct pxa2xx_spi_chip { extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_controller *info); #endif -#endif + +#endif /* __LINUX_SPI_PXA2XX_SPI_H */ From 1beb37b0e3f98708bfb37778049764b4500756da Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Fri, 23 Apr 2021 21:24:33 +0300 Subject: [PATCH 6/6] spi: pxa2xx: Group Intel Quark specific definitions DDS_RATE is Intel Quark specific definition. Move it to the rest Intel Quark related. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20210423182441.50272-7-andriy.shevchenko@linux.intel.com Signed-off-by: Mark Brown --- include/linux/pxa2xx_ssp.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/include/linux/pxa2xx_ssp.h b/include/linux/pxa2xx_ssp.h index 14b049840faf..1b6c1a0922bd 100644 --- a/include/linux/pxa2xx_ssp.h +++ b/include/linux/pxa2xx_ssp.h @@ -38,7 +38,6 @@ struct device_node; #define SSDR (0x10) /* SSP Data Write/Data Read Register */ #define SSTO (0x28) /* SSP Time Out Register */ -#define DDS_RATE (0x28) /* SSP DDS Clock Rate Register (Intel Quark) */ #define SSPSP (0x2C) /* SSP Programmable Serial Protocol */ #define SSTSA (0x30) /* SSP Tx Timeslot Active */ #define SSRSA (0x34) /* SSP Rx Timeslot Active */ @@ -105,6 +104,9 @@ struct device_node; #define CE4100_SSCR1_RFT GENMASK(11, 10) /* Receive FIFO Threshold (mask) */ #define CE4100_SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..4] */ +/* Intel Quark X1000 */ +#define DDS_RATE 0x28 /* SSP DDS Clock Rate Register */ + /* QUARK_X1000 SSCR0 bit definition */ #define QUARK_X1000_SSCR0_DSS GENMASK(4, 0) /* Data Size Select (mask) */ #define QUARK_X1000_SSCR0_DataSize(x) ((x) - 1) /* Data Size Select [4..32] */