| Message ID | 20211013114432.31352-3-mika.westerberg@linux.intel.com |
|---|---|
| State | Superseded |
| Delegated to: | Ambarus Tudor |
| Headers | show |
| Series | mtd: spi-nor / spi / MFD: Convert intel-spi to SPI MEM | expand |
On 13/10/21 02:44PM, Mika Westerberg wrote: > The preferred way to implement SPI-NOR controller drivers is through SPI > subsubsystem utilizing the SPI MEM core functions. This converts the > Intel SPI flash controller driver over the SPI MEM by moving the driver > from SPI-NOR subsystem to SPI subsystem and in one go make it use the > SPI MEM functions. The driver name will be changed from intel-spi to > spi-intel to match the convention used in the SPI subsystem. > > Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> > Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > --- > drivers/mtd/spi-nor/controllers/Kconfig | 36 -- > drivers/mtd/spi-nor/controllers/Makefile | 3 - > drivers/mtd/spi-nor/controllers/intel-spi.h | 21 -- > drivers/spi/Kconfig | 39 +++ > drivers/spi/Makefile | 3 + > .../intel-spi-pci.c => spi/spi-intel-pci.c} | 20 +- > .../spi-intel-platform.c} | 21 +- > .../intel-spi.c => spi/spi-intel.c} | 316 +++++++++++------- > drivers/spi/spi-intel.h | 19 ++ > include/linux/mfd/lpc_ich.h | 2 +- > .../x86/{intel-spi.h => spi-intel.h} | 6 +- > 11 files changed, 266 insertions(+), 220 deletions(-) > delete mode 100644 drivers/mtd/spi-nor/controllers/intel-spi.h > rename drivers/{mtd/spi-nor/controllers/intel-spi-pci.c => spi/spi-intel-pci.c} (86%) > rename drivers/{mtd/spi-nor/controllers/intel-spi-platform.c => spi/spi-intel-platform.c} (65%) > rename drivers/{mtd/spi-nor/controllers/intel-spi.c => spi/spi-intel.c} (79%) > create mode 100644 drivers/spi/spi-intel.h > rename include/linux/platform_data/x86/{intel-spi.h => spi-intel.h} (89%) > [...] > +static bool intel_spi_supports_mem_op(struct spi_mem *mem, > + const struct spi_mem_op *op) > +{ > + struct intel_spi *ispi = spi_master_get_devdata(mem->spi->master); > + > + if (op->cmd.dtr) > + return false; > + > + /* > + * The Intel controller supports widths up to 4 but it handles > + * them automatically and does not expose them to software. Here > + * we accept anything up to 4. > + */ > + if (op->cmd.buswidth > 4 || > + (op->addr.nbytes && op->addr.buswidth > 4) || > + (op->dummy.nbytes && op->dummy.buswidth > 4)) Also need to check data buswidth here? Other than this, Acked-by: Pratyush Yadav <p.yadav@ti.com> > + return false; > + > + if (ispi->swseq_reg && ispi->locked) { > + int i; > + > + /* Check if it is in the locked opcodes list */ > + for (i = 0; i < ARRAY_SIZE(ispi->opcodes); i++) { > + if (ispi->opcodes[i] == op->cmd.opcode) > + goto check_opcode; > } > > - return 0; > + return false; > } > > - /* Not needed with HW sequencer erase, make sure it is cleared */ > - ispi->atomic_preopcode = 0; > +check_opcode: > + switch (op->cmd.opcode) { > + case SPINOR_OP_RDID: > + case SPINOR_OP_RDSR: > + case SPINOR_OP_WRSR: > + return true; > > - while (len > 0) { > - writel(offs, ispi->base + FADDR); > + case SPINOR_OP_READ: > + case SPINOR_OP_READ_FAST: > + case SPINOR_OP_READ_4B: > + case SPINOR_OP_READ_FAST_4B: > + return true; > > - val = readl(ispi->base + HSFSTS_CTL); > - val &= ~(HSFSTS_CTL_FDBC_MASK | HSFSTS_CTL_FCYCLE_MASK); > - val |= HSFSTS_CTL_AEL | HSFSTS_CTL_FCERR | HSFSTS_CTL_FDONE; > - val |= cmd; > - val |= HSFSTS_CTL_FGO; > - writel(val, ispi->base + HSFSTS_CTL); > + case SPINOR_OP_PP: > + case SPINOR_OP_PP_4B: > + case SPINOR_OP_WREN: > + case SPINOR_OP_WRDI: > + return true; > > - ret = intel_spi_wait_hw_busy(ispi); > - if (ret) > - return ret; > + case SPINOR_OP_SE: > + case SPINOR_OP_SE_4B: > + return ispi->erase_64k; > > - status = readl(ispi->base + HSFSTS_CTL); > - if (status & HSFSTS_CTL_FCERR) > - return -EIO; > - else if (status & HSFSTS_CTL_AEL) > - return -EACCES; > + case SPINOR_OP_BE_4K: > + case SPINOR_OP_BE_4K_4B: > + return true; > + } > > - offs += erase_size; > - len -= erase_size; > + return false; > +} > + [...]
On Wed, 13 Oct 2021 14:44:31 +0300 Mika Westerberg <mika.westerberg@linux.intel.com> wrote: > The preferred way to implement SPI-NOR controller drivers is through SPI > subsubsystem utilizing the SPI MEM core functions. This converts the > Intel SPI flash controller driver over the SPI MEM by moving the driver > from SPI-NOR subsystem to SPI subsystem and in one go make it use the > SPI MEM functions. The driver name will be changed from intel-spi to > spi-intel to match the convention used in the SPI subsystem. > I skimmed over the driver changes, and I'm skeptical about this "let's convert all spi-nor controller drivers into spi-mem drivers even if they don't fit the spi-mem model" strategy. Clearly, the intel controller is much more limited than any other spi-mem controller (I mean feature-wise not perf-wise of course). The fact that you have to check the opcode to decide whether the operation is supported or not, or the way you deduce when to issue an erase vs a regular read/write is kind of hack-ish. Not saying we shouldn't support this case in spi-mem, but it should at least be done in a more controlled way. Maybe with an explicit array of supported spi_mem operations, and driver specific hooks for each of these operations so anything falling outside is clearly identified and rejected (we have this sort of things in the raw NAND framework). > Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> > Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > --- > +static bool intel_spi_supports_mem_op(struct spi_mem *mem, > + const struct spi_mem_op *op) > +{ > + struct intel_spi *ispi = spi_master_get_devdata(mem->spi->master); > + > + if (op->cmd.dtr) > + return false; > + > + /* > + * The Intel controller supports widths up to 4 but it handles > + * them automatically and does not expose them to software. Here > + * we accept anything up to 4. > + */ > + if (op->cmd.buswidth > 4 || > + (op->addr.nbytes && op->addr.buswidth > 4) || > + (op->dummy.nbytes && op->dummy.buswidth > 4)) > + return false; > + > + if (ispi->swseq_reg && ispi->locked) { > + int i; > + > + /* Check if it is in the locked opcodes list */ > + for (i = 0; i < ARRAY_SIZE(ispi->opcodes); i++) { > + if (ispi->opcodes[i] == op->cmd.opcode) > + goto check_opcode; > } > > - return 0; > + return false; > } > > - /* Not needed with HW sequencer erase, make sure it is cleared */ > - ispi->atomic_preopcode = 0; > +check_opcode: > + switch (op->cmd.opcode) { > + case SPINOR_OP_RDID: > + case SPINOR_OP_RDSR: > + case SPINOR_OP_WRSR: > + return true; Ouch. I hate how spi-nor specific stuff leak into the supposedly spi-mem generic driver. Now if we want to allow such specialization, we should at least make sure the whole operation is consistent instead of checking the opcode, address, dummy and data cycles separately. > > - while (len > 0) { > - writel(offs, ispi->base + FADDR); > + case SPINOR_OP_READ: > + case SPINOR_OP_READ_FAST: > + case SPINOR_OP_READ_4B: > + case SPINOR_OP_READ_FAST_4B: > + return true; > > - val = readl(ispi->base + HSFSTS_CTL); > - val &= ~(HSFSTS_CTL_FDBC_MASK | HSFSTS_CTL_FCYCLE_MASK); > - val |= HSFSTS_CTL_AEL | HSFSTS_CTL_FCERR | HSFSTS_CTL_FDONE; > - val |= cmd; > - val |= HSFSTS_CTL_FGO; > - writel(val, ispi->base + HSFSTS_CTL); > + case SPINOR_OP_PP: > + case SPINOR_OP_PP_4B: > + case SPINOR_OP_WREN: > + case SPINOR_OP_WRDI: > + return true; > > - ret = intel_spi_wait_hw_busy(ispi); > - if (ret) > - return ret; > + case SPINOR_OP_SE: > + case SPINOR_OP_SE_4B: > + return ispi->erase_64k; > > - status = readl(ispi->base + HSFSTS_CTL); > - if (status & HSFSTS_CTL_FCERR) > - return -EIO; > - else if (status & HSFSTS_CTL_AEL) > - return -EACCES; > + case SPINOR_OP_BE_4K: > + case SPINOR_OP_BE_4K_4B: > + return true; > + } > > - offs += erase_size; > - len -= erase_size; > + return false; > +} > + > +static int intel_spi_exec_mem_op(struct spi_mem *mem, const struct spi_mem_op *op) > +{ > + struct intel_spi *ispi = spi_master_get_devdata(mem->spi->master); > + size_t nbytes = op->data.nbytes; > + u8 opcode = op->cmd.opcode; > + > + if (op->addr.nbytes) { > + if (op->data.dir == SPI_MEM_DATA_IN) > + return intel_spi_read(ispi, op->addr.val, nbytes, > + op->data.buf.in); > + if (op->data.dir == SPI_MEM_DATA_OUT) > + return intel_spi_write(ispi, op->addr.val, nbytes, > + op->data.buf.out); > + if (op->data.dir == SPI_MEM_NO_DATA) > + return intel_spi_erase(ispi, opcode, op->addr.val); That's risky IMHO, how can you be sure that NO_DATA means erase? Again, it looks like the whole operation should be checked, not just the data field. > + } else { > + if (op->data.dir == SPI_MEM_DATA_IN) > + return intel_spi_read_reg(ispi, opcode, op->data.buf.in, > + nbytes); > + if (op->data.dir == SPI_MEM_DATA_OUT) > + return intel_spi_write_reg(ispi, opcode, op->data.buf.out, > + nbytes); > + if (op->data.dir == SPI_MEM_NO_DATA) > + return intel_spi_write_reg(ispi, opcode, NULL, 0); > } > > - return 0; > + return -EINVAL; > +} > +
On 20/10/21 11:41AM, Boris Brezillon wrote: > On Wed, 13 Oct 2021 14:44:31 +0300 > Mika Westerberg <mika.westerberg@linux.intel.com> wrote: > > > The preferred way to implement SPI-NOR controller drivers is through SPI > > subsubsystem utilizing the SPI MEM core functions. This converts the > > Intel SPI flash controller driver over the SPI MEM by moving the driver > > from SPI-NOR subsystem to SPI subsystem and in one go make it use the > > SPI MEM functions. The driver name will be changed from intel-spi to > > spi-intel to match the convention used in the SPI subsystem. > > > > I skimmed over the driver changes, and I'm skeptical about this "let's > convert all spi-nor controller drivers into spi-mem drivers even if > they don't fit the spi-mem model" strategy. Clearly, the intel > controller is much more limited than any other spi-mem controller (I > mean feature-wise not perf-wise of course). The fact that you have to > check the opcode to decide whether the operation is supported or not, > or the way you deduce when to issue an erase vs a regular read/write is > kind of hack-ish. Not saying we shouldn't support this case in spi-mem, > but it should at least be done in a more controlled way. Maybe with an > explicit array of supported spi_mem operations, and driver specific > hooks for each of these operations so anything falling outside is > clearly identified and rejected (we have this sort of things in the raw > NAND framework). I am curious about how we can solve this. Any pointers to functions/drivers in raw NAND framework that follow this model? [...]
On Wed, 20 Oct 2021 17:29:15 +0530 Pratyush Yadav <p.yadav@ti.com> wrote: > On 20/10/21 11:41AM, Boris Brezillon wrote: > > On Wed, 13 Oct 2021 14:44:31 +0300 > > Mika Westerberg <mika.westerberg@linux.intel.com> wrote: > > > > > The preferred way to implement SPI-NOR controller drivers is through SPI > > > subsubsystem utilizing the SPI MEM core functions. This converts the > > > Intel SPI flash controller driver over the SPI MEM by moving the driver > > > from SPI-NOR subsystem to SPI subsystem and in one go make it use the > > > SPI MEM functions. The driver name will be changed from intel-spi to > > > spi-intel to match the convention used in the SPI subsystem. > > > > > > > I skimmed over the driver changes, and I'm skeptical about this "let's > > convert all spi-nor controller drivers into spi-mem drivers even if > > they don't fit the spi-mem model" strategy. Clearly, the intel > > controller is much more limited than any other spi-mem controller (I > > mean feature-wise not perf-wise of course). The fact that you have to > > check the opcode to decide whether the operation is supported or not, > > or the way you deduce when to issue an erase vs a regular read/write is > > kind of hack-ish. Not saying we shouldn't support this case in spi-mem, > > but it should at least be done in a more controlled way. Maybe with an > > explicit array of supported spi_mem operations, and driver specific > > hooks for each of these operations so anything falling outside is > > clearly identified and rejected (we have this sort of things in the raw > > NAND framework). > > I am curious about how we can solve this. Any pointers to > functions/drivers in raw NAND framework that follow this model? It's not quite what you'd need, but nand_op_parser_pattern follows the same philosophy: describe a pattern and attach a hook to be executed when this pattern is found. Then you pass this pattern table to a helper that tries to match the operation against the supported patterns. If it finds one that matches, the operation is reported as supported and/or executed, otherwise it's rejected. In this particular case, the pattern must be very specific: * matching opcode * matching direction * matching number of address cycles * matching number of dummy cycles? * max/min number of data cycles?
Hi Pratyush, p.yadav@ti.com wrote on Wed, 20 Oct 2021 17:29:15 +0530: > On 20/10/21 11:41AM, Boris Brezillon wrote: > > On Wed, 13 Oct 2021 14:44:31 +0300 > > Mika Westerberg <mika.westerberg@linux.intel.com> wrote: > > > > > The preferred way to implement SPI-NOR controller drivers is through SPI > > > subsubsystem utilizing the SPI MEM core functions. This converts the > > > Intel SPI flash controller driver over the SPI MEM by moving the driver > > > from SPI-NOR subsystem to SPI subsystem and in one go make it use the > > > SPI MEM functions. The driver name will be changed from intel-spi to > > > spi-intel to match the convention used in the SPI subsystem. > > > > > > > I skimmed over the driver changes, and I'm skeptical about this "let's > > convert all spi-nor controller drivers into spi-mem drivers even if > > they don't fit the spi-mem model" strategy. Clearly, the intel > > controller is much more limited than any other spi-mem controller (I > > mean feature-wise not perf-wise of course). The fact that you have to > > check the opcode to decide whether the operation is supported or not, > > or the way you deduce when to issue an erase vs a regular read/write is > > kind of hack-ish. Not saying we shouldn't support this case in spi-mem, > > but it should at least be done in a more controlled way. Maybe with an > > explicit array of supported spi_mem operations, and driver specific > > hooks for each of these operations so anything falling outside is > > clearly identified and rejected (we have this sort of things in the raw > > NAND framework). > > I am curious about how we can solve this. Any pointers to > functions/drivers in raw NAND framework that follow this model? ->exec_op() should be implemented by controller drivers, there is a check_only flag to verify that the operation is supported by the controller, the entire operation is provided so that the controller driver knows exactly where we are going and does not try to guess anything. There is also a parser in the core that allows "complicated"/"constrained" drivers to just give a number of patterns they support and the parser will do the job of finding how the operation should be split. I believe this was what Boris referred to. If not, please correct me. Thanks, Miquèl
On Wed, Oct 20, 2021 at 11:41:53AM +0200, Boris Brezillon wrote: > On Wed, 13 Oct 2021 14:44:31 +0300 > Mika Westerberg <mika.westerberg@linux.intel.com> wrote: > > > The preferred way to implement SPI-NOR controller drivers is through SPI > > subsubsystem utilizing the SPI MEM core functions. This converts the > > Intel SPI flash controller driver over the SPI MEM by moving the driver > > from SPI-NOR subsystem to SPI subsystem and in one go make it use the > > SPI MEM functions. The driver name will be changed from intel-spi to > > spi-intel to match the convention used in the SPI subsystem. > > > > I skimmed over the driver changes, and I'm skeptical about this "let's > convert all spi-nor controller drivers into spi-mem drivers even if > they don't fit the spi-mem model" strategy. Clearly, the intel > controller is much more limited than any other spi-mem controller (I > mean feature-wise not perf-wise of course). The fact that you have to > check the opcode to decide whether the operation is supported or not, > or the way you deduce when to issue an erase vs a regular read/write is > kind of hack-ish. Not saying we shouldn't support this case in spi-mem, > but it should at least be done in a more controlled way. Maybe with an > explicit array of supported spi_mem operations, and driver specific > hooks for each of these operations so anything falling outside is > clearly identified and rejected (we have this sort of things in the raw > NAND framework). I'm not fan of this either but this was requirement from the SPI-NOR maintainers before any new features can be added, and we have a bunch of new hardware that needs to be supported :( Sure, I can take a look at the array you suggest if that helps to get things moving. Any objections anyone for doing this? > > Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> > > Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > > --- > > > +static bool intel_spi_supports_mem_op(struct spi_mem *mem, > > + const struct spi_mem_op *op) > > +{ > > + struct intel_spi *ispi = spi_master_get_devdata(mem->spi->master); > > + > > + if (op->cmd.dtr) > > + return false; > > + > > + /* > > + * The Intel controller supports widths up to 4 but it handles > > + * them automatically and does not expose them to software. Here > > + * we accept anything up to 4. > > + */ > > + if (op->cmd.buswidth > 4 || > > + (op->addr.nbytes && op->addr.buswidth > 4) || > > + (op->dummy.nbytes && op->dummy.buswidth > 4)) > > + return false; > > + > > + if (ispi->swseq_reg && ispi->locked) { > > + int i; > > + > > + /* Check if it is in the locked opcodes list */ > > + for (i = 0; i < ARRAY_SIZE(ispi->opcodes); i++) { > > + if (ispi->opcodes[i] == op->cmd.opcode) > > + goto check_opcode; > > } > > > > - return 0; > > + return false; > > } > > > > - /* Not needed with HW sequencer erase, make sure it is cleared */ > > - ispi->atomic_preopcode = 0; > > +check_opcode: > > + switch (op->cmd.opcode) { > > + case SPINOR_OP_RDID: > > + case SPINOR_OP_RDSR: > > + case SPINOR_OP_WRSR: > > + return true; > > Ouch. I hate how spi-nor specific stuff leak into the supposedly > spi-mem generic driver. Now if we want to allow such specialization, we > should at least make sure the whole operation is consistent instead of > checking the opcode, address, dummy and data cycles separately. OK. > > - while (len > 0) { > > - writel(offs, ispi->base + FADDR); > > + case SPINOR_OP_READ: > > + case SPINOR_OP_READ_FAST: > > + case SPINOR_OP_READ_4B: > > + case SPINOR_OP_READ_FAST_4B: > > + return true; > > > > - val = readl(ispi->base + HSFSTS_CTL); > > - val &= ~(HSFSTS_CTL_FDBC_MASK | HSFSTS_CTL_FCYCLE_MASK); > > - val |= HSFSTS_CTL_AEL | HSFSTS_CTL_FCERR | HSFSTS_CTL_FDONE; > > - val |= cmd; > > - val |= HSFSTS_CTL_FGO; > > - writel(val, ispi->base + HSFSTS_CTL); > > + case SPINOR_OP_PP: > > + case SPINOR_OP_PP_4B: > > + case SPINOR_OP_WREN: > > + case SPINOR_OP_WRDI: > > + return true; > > > > - ret = intel_spi_wait_hw_busy(ispi); > > - if (ret) > > - return ret; > > + case SPINOR_OP_SE: > > + case SPINOR_OP_SE_4B: > > + return ispi->erase_64k; > > > > - status = readl(ispi->base + HSFSTS_CTL); > > - if (status & HSFSTS_CTL_FCERR) > > - return -EIO; > > - else if (status & HSFSTS_CTL_AEL) > > - return -EACCES; > > + case SPINOR_OP_BE_4K: > > + case SPINOR_OP_BE_4K_4B: > > + return true; > > + } > > > > - offs += erase_size; > > - len -= erase_size; > > + return false; > > +} > > + > > +static int intel_spi_exec_mem_op(struct spi_mem *mem, const struct spi_mem_op *op) > > +{ > > + struct intel_spi *ispi = spi_master_get_devdata(mem->spi->master); > > + size_t nbytes = op->data.nbytes; > > + u8 opcode = op->cmd.opcode; > > + > > + if (op->addr.nbytes) { > > + if (op->data.dir == SPI_MEM_DATA_IN) > > + return intel_spi_read(ispi, op->addr.val, nbytes, > > + op->data.buf.in); > > + if (op->data.dir == SPI_MEM_DATA_OUT) > > + return intel_spi_write(ispi, op->addr.val, nbytes, > > + op->data.buf.out); > > + if (op->data.dir == SPI_MEM_NO_DATA) > > + return intel_spi_erase(ispi, opcode, op->addr.val); > > That's risky IMHO, how can you be sure that NO_DATA means erase? Again, > it looks like the whole operation should be checked, not just the data > field. intel_spi_erase() does further checks based on the opcode: switch (opcode) { case SPINOR_OP_SE: cmd = HSFSTS_CTL_FCYCLE_ERASE_64K; break; case SPINOR_OP_BE_4K: cmd = HSFSTS_CTL_FCYCLE_ERASE; break; default: return -EINVAL; } I should probably add comment on the caller to make it clear though.
diff --git a/drivers/mtd/spi-nor/controllers/Kconfig b/drivers/mtd/spi-nor/controllers/Kconfig index 5c0e0ec2e6d1..50f4f3484d42 100644 --- a/drivers/mtd/spi-nor/controllers/Kconfig +++ b/drivers/mtd/spi-nor/controllers/Kconfig @@ -26,39 +26,3 @@ config SPI_NXP_SPIFI SPIFI is a specialized controller for connecting serial SPI Flash. Enable this option if you have a device with a SPIFI controller and want to access the Flash as a mtd device. - -config SPI_INTEL_SPI - tristate - -config SPI_INTEL_SPI_PCI - tristate "Intel PCH/PCU SPI flash PCI driver (DANGEROUS)" - depends on X86 && PCI - select SPI_INTEL_SPI - help - This enables PCI support for the Intel PCH/PCU SPI controller in - master mode. This controller is present in modern Intel hardware - and is used to hold BIOS and other persistent settings. Using - this driver it is possible to upgrade BIOS directly from Linux. - - Say N here unless you know what you are doing. Overwriting the - SPI flash may render the system unbootable. - - To compile this driver as a module, choose M here: the module - will be called intel-spi-pci. - -config SPI_INTEL_SPI_PLATFORM - tristate "Intel PCH/PCU SPI flash platform driver (DANGEROUS)" - depends on X86 - select SPI_INTEL_SPI - help - This enables platform support for the Intel PCH/PCU SPI - controller in master mode. This controller is present in modern - Intel hardware and is used to hold BIOS and other persistent - settings. Using this driver it is possible to upgrade BIOS - directly from Linux. - - Say N here unless you know what you are doing. Overwriting the - SPI flash may render the system unbootable. - - To compile this driver as a module, choose M here: the module - will be called intel-spi-platform. diff --git a/drivers/mtd/spi-nor/controllers/Makefile b/drivers/mtd/spi-nor/controllers/Makefile index e7abba491d98..6e2a1dc68466 100644 --- a/drivers/mtd/spi-nor/controllers/Makefile +++ b/drivers/mtd/spi-nor/controllers/Makefile @@ -2,6 +2,3 @@ obj-$(CONFIG_SPI_ASPEED_SMC) += aspeed-smc.o obj-$(CONFIG_SPI_HISI_SFC) += hisi-sfc.o obj-$(CONFIG_SPI_NXP_SPIFI) += nxp-spifi.o -obj-$(CONFIG_SPI_INTEL_SPI) += intel-spi.o -obj-$(CONFIG_SPI_INTEL_SPI_PCI) += intel-spi-pci.o -obj-$(CONFIG_SPI_INTEL_SPI_PLATFORM) += intel-spi-platform.o diff --git a/drivers/mtd/spi-nor/controllers/intel-spi.h b/drivers/mtd/spi-nor/controllers/intel-spi.h deleted file mode 100644 index f2871179fd34..000000000000 --- a/drivers/mtd/spi-nor/controllers/intel-spi.h +++ /dev/null @@ -1,21 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Intel PCH/PCU SPI flash driver. - * - * Copyright (C) 2016, Intel Corporation - * Author: Mika Westerberg <mika.westerberg@linux.intel.com> - */ - -#ifndef INTEL_SPI_H -#define INTEL_SPI_H - -#include <linux/platform_data/x86/intel-spi.h> - -struct intel_spi; -struct resource; - -struct intel_spi *intel_spi_probe(struct device *dev, - struct resource *mem, const struct intel_spi_boardinfo *info); -int intel_spi_remove(struct intel_spi *ispi); - -#endif /* INTEL_SPI_H */ diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 83e352b0c8f9..5fe26de43537 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -406,6 +406,45 @@ config SPI_IMX help This enables support for the Freescale i.MX SPI controllers. +config SPI_INTEL + tristate + +config SPI_INTEL_PCI + tristate "Intel PCH/PCU SPI flash PCI driver (DANGEROUS)" + depends on PCI + depends on X86 || COMPILE_TEST + depends on SPI_MEM + select SPI_INTEL + help + This enables PCI support for the Intel PCH/PCU SPI controller in + master mode. This controller is present in modern Intel hardware + and is used to hold BIOS and other persistent settings. Using + this driver it is possible to upgrade BIOS directly from Linux. + + Say N here unless you know what you are doing. Overwriting the + SPI flash may render the system unbootable. + + To compile this driver as a module, choose M here: the module + will be called spi-intel-pci. + +config SPI_INTEL_PLATFORM + tristate "Intel PCH/PCU SPI flash platform driver (DANGEROUS)" + depends on X86 || COMPILE_TEST + depends on SPI_MEM + select SPI_INTEL + help + This enables platform support for the Intel PCH/PCU SPI + controller in master mode. This controller is present in modern + Intel hardware and is used to hold BIOS and other persistent + settings. Using this driver it is possible to upgrade BIOS + directly from Linux. + + Say N here unless you know what you are doing. Overwriting the + SPI flash may render the system unbootable. + + To compile this driver as a module, choose M here: the module + will be called spi-intel-platform. + config SPI_JCORE tristate "J-Core SPI Master" depends on OF && (SUPERH || COMPILE_TEST) diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index 699db95c8441..070918a79362 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -59,6 +59,9 @@ obj-$(CONFIG_SPI_HISI_KUNPENG) += spi-hisi-kunpeng.o obj-$(CONFIG_SPI_HISI_SFC_V3XX) += spi-hisi-sfc-v3xx.o obj-$(CONFIG_SPI_IMG_SPFI) += spi-img-spfi.o obj-$(CONFIG_SPI_IMX) += spi-imx.o +obj-$(CONFIG_SPI_INTEL) += spi-intel.o +obj-$(CONFIG_SPI_INTEL_PCI) += spi-intel-pci.o +obj-$(CONFIG_SPI_INTEL_PLATFORM) += spi-intel-platform.o obj-$(CONFIG_SPI_LANTIQ_SSC) += spi-lantiq-ssc.o obj-$(CONFIG_SPI_JCORE) += spi-jcore.o obj-$(CONFIG_SPI_LM70_LLP) += spi-lm70llp.o diff --git a/drivers/mtd/spi-nor/controllers/intel-spi-pci.c b/drivers/spi/spi-intel-pci.c similarity index 86% rename from drivers/mtd/spi-nor/controllers/intel-spi-pci.c rename to drivers/spi/spi-intel-pci.c index 508f7ca098ef..a177b10bc288 100644 --- a/drivers/mtd/spi-nor/controllers/intel-spi-pci.c +++ b/drivers/spi/spi-intel-pci.c @@ -2,16 +2,14 @@ /* * Intel PCH/PCU SPI flash PCI driver. * - * Copyright (C) 2016, Intel Corporation + * Copyright (C) 2016 - 2021 Intel Corporation * Author: Mika Westerberg <mika.westerberg@linux.intel.com> */ -#include <linux/ioport.h> -#include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> -#include "intel-spi.h" +#include "spi-intel.h" #define BCR 0xdc #define BCR_WPD BIT(0) @@ -46,7 +44,6 @@ static int intel_spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct intel_spi_boardinfo *info; - struct intel_spi *ispi; int ret; ret = pcim_enable_device(pdev); @@ -59,17 +56,7 @@ static int intel_spi_pci_probe(struct pci_dev *pdev, return -ENOMEM; info->data = pdev; - ispi = intel_spi_probe(&pdev->dev, &pdev->resource[0], info); - if (IS_ERR(ispi)) - return PTR_ERR(ispi); - - pci_set_drvdata(pdev, ispi); - return 0; -} - -static void intel_spi_pci_remove(struct pci_dev *pdev) -{ - intel_spi_remove(pci_get_drvdata(pdev)); + return intel_spi_probe(&pdev->dev, &pdev->resource[0], info); } static const struct pci_device_id intel_spi_pci_ids[] = { @@ -98,7 +85,6 @@ static struct pci_driver intel_spi_pci_driver = { .name = "intel-spi", .id_table = intel_spi_pci_ids, .probe = intel_spi_pci_probe, - .remove = intel_spi_pci_remove, }; module_pci_driver(intel_spi_pci_driver); diff --git a/drivers/mtd/spi-nor/controllers/intel-spi-platform.c b/drivers/spi/spi-intel-platform.c similarity index 65% rename from drivers/mtd/spi-nor/controllers/intel-spi-platform.c rename to drivers/spi/spi-intel-platform.c index f80f1086f928..293e03f239de 100644 --- a/drivers/mtd/spi-nor/controllers/intel-spi-platform.c +++ b/drivers/spi/spi-intel-platform.c @@ -2,20 +2,18 @@ /* * Intel PCH/PCU SPI flash platform driver. * - * Copyright (C) 2016, Intel Corporation + * Copyright (C) 2016 - 2021 Intel Corporation * Author: Mika Westerberg <mika.westerberg@linux.intel.com> */ -#include <linux/ioport.h> #include <linux/module.h> #include <linux/platform_device.h> -#include "intel-spi.h" +#include "spi-intel.h" static int intel_spi_platform_probe(struct platform_device *pdev) { struct intel_spi_boardinfo *info; - struct intel_spi *ispi; struct resource *mem; info = dev_get_platdata(&pdev->dev); @@ -23,24 +21,11 @@ static int intel_spi_platform_probe(struct platform_device *pdev) return -EINVAL; mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - ispi = intel_spi_probe(&pdev->dev, mem, info); - if (IS_ERR(ispi)) - return PTR_ERR(ispi); - - platform_set_drvdata(pdev, ispi); - return 0; -} - -static int intel_spi_platform_remove(struct platform_device *pdev) -{ - struct intel_spi *ispi = platform_get_drvdata(pdev); - - return intel_spi_remove(ispi); + return intel_spi_probe(&pdev->dev, mem, info); } static struct platform_driver intel_spi_platform_driver = { .probe = intel_spi_platform_probe, - .remove = intel_spi_platform_remove, .driver = { .name = "intel-spi", }, diff --git a/drivers/mtd/spi-nor/controllers/intel-spi.c b/drivers/spi/spi-intel.c similarity index 79% rename from drivers/mtd/spi-nor/controllers/intel-spi.c rename to drivers/spi/spi-intel.c index f35597cbea0c..6ce981637ba6 100644 --- a/drivers/mtd/spi-nor/controllers/intel-spi.c +++ b/drivers/spi/spi-intel.c @@ -2,21 +2,21 @@ /* * Intel PCH/PCU SPI flash driver. * - * Copyright (C) 2016, Intel Corporation + * Copyright (C) 2016 - 2021 Intel Corporation * Author: Mika Westerberg <mika.westerberg@linux.intel.com> */ -#include <linux/err.h> -#include <linux/io.h> #include <linux/iopoll.h> #include <linux/module.h> -#include <linux/sched.h> -#include <linux/sizes.h> -#include <linux/mtd/mtd.h> + #include <linux/mtd/partitions.h> #include <linux/mtd/spi-nor.h> -#include "intel-spi.h" +#include <linux/spi/flash.h> +#include <linux/spi/spi.h> +#include <linux/spi/spi-mem.h> + +#include "spi-intel.h" /* Offsets are from @ispi->base */ #define BFPREG 0x00 @@ -92,8 +92,6 @@ /* CPU specifics */ #define BYT_PR 0x74 #define BYT_SSFSTS_CTL 0x90 -#define BYT_BCR 0xfc -#define BYT_BCR_WPD BIT(0) #define BYT_FREG_NUM 5 #define BYT_PR_NUM 5 @@ -125,10 +123,10 @@ * struct intel_spi - Driver private data * @dev: Device pointer * @info: Pointer to board specific info - * @nor: SPI NOR layer structure * @base: Beginning of MMIO space * @pregs: Start of protection registers * @sregs: Start of software sequencer registers + * @master: Pointer to the SPI controller structure * @nregions: Maximum number of regions * @pr_num: Maximum number of protected range registers * @locked: Is SPI setting locked @@ -142,10 +140,10 @@ struct intel_spi { struct device *dev; const struct intel_spi_boardinfo *info; - struct spi_nor nor; void __iomem *base; void __iomem *pregs; void __iomem *sregs; + struct spi_controller *master; size_t nregions; size_t pr_num; bool locked; @@ -199,9 +197,6 @@ static void intel_spi_dump_regs(struct intel_spi *ispi) readl(ispi->sregs + OPMENU1)); } - if (ispi->info->type == INTEL_SPI_BYT) - dev_dbg(ispi->dev, "BCR=0x%08x\n", readl(ispi->base + BYT_BCR)); - dev_dbg(ispi->dev, "LVSCC=0x%08x\n", readl(ispi->base + LVSCC)); dev_dbg(ispi->dev, "UVSCC=0x%08x\n", readl(ispi->base + UVSCC)); @@ -419,7 +414,6 @@ static int intel_spi_init(struct intel_spi *ispi) } intel_spi_dump_regs(ispi); - return 0; } @@ -553,10 +547,9 @@ static int intel_spi_sw_cycle(struct intel_spi *ispi, u8 opcode, size_t len, return 0; } -static int intel_spi_read_reg(struct spi_nor *nor, u8 opcode, u8 *buf, +static int intel_spi_read_reg(struct intel_spi *ispi, u8 opcode, void *buf, size_t len) { - struct intel_spi *ispi = nor->priv; int ret; /* Address of the first chip */ @@ -574,10 +567,9 @@ static int intel_spi_read_reg(struct spi_nor *nor, u8 opcode, u8 *buf, return intel_spi_read_block(ispi, buf, len); } -static int intel_spi_write_reg(struct spi_nor *nor, u8 opcode, const u8 *buf, +static int intel_spi_write_reg(struct intel_spi *ispi, u8 opcode, const void *buf, size_t len) { - struct intel_spi *ispi = nor->priv; int ret; /* @@ -632,10 +624,9 @@ static int intel_spi_write_reg(struct spi_nor *nor, u8 opcode, const u8 *buf, return intel_spi_hw_cycle(ispi, opcode, len); } -static ssize_t intel_spi_read(struct spi_nor *nor, loff_t from, size_t len, - u_char *read_buf) +static ssize_t intel_spi_read(struct intel_spi *ispi, u32 from, size_t len, + void *read_buf) { - struct intel_spi *ispi = nor->priv; size_t block_size, retlen = 0; u32 val, status; ssize_t ret; @@ -647,16 +638,6 @@ static ssize_t intel_spi_read(struct spi_nor *nor, loff_t from, size_t len, if (WARN_ON_ONCE(ispi->atomic_preopcode)) ispi->atomic_preopcode = 0; - switch (nor->read_opcode) { - case SPINOR_OP_READ: - case SPINOR_OP_READ_FAST: - case SPINOR_OP_READ_4B: - case SPINOR_OP_READ_FAST_4B: - break; - default: - return -EINVAL; - } - while (len > 0) { block_size = min_t(size_t, len, INTEL_SPI_FIFO_SZ); @@ -685,8 +666,7 @@ static ssize_t intel_spi_read(struct spi_nor *nor, loff_t from, size_t len, ret = -EACCES; if (ret < 0) { - dev_err(ispi->dev, "read error: %llx: %#x\n", from, - status); + dev_err(ispi->dev, "read error: %x: %#x\n", from, status); return ret; } @@ -703,10 +683,9 @@ static ssize_t intel_spi_read(struct spi_nor *nor, loff_t from, size_t len, return retlen; } -static ssize_t intel_spi_write(struct spi_nor *nor, loff_t to, size_t len, - const u_char *write_buf) +static ssize_t intel_spi_write(struct intel_spi *ispi, u32 to, size_t len, + const void *write_buf) { - struct intel_spi *ispi = nor->priv; size_t block_size, retlen = 0; u32 val, status; ssize_t ret; @@ -752,8 +731,7 @@ static ssize_t intel_spi_write(struct spi_nor *nor, loff_t to, size_t len, ret = -EACCES; if (ret < 0) { - dev_err(ispi->dev, "write error: %llx: %#x\n", to, - status); + dev_err(ispi->dev, "write error: %x: %#x\n", to, status); return ret; } @@ -766,68 +744,160 @@ static ssize_t intel_spi_write(struct spi_nor *nor, loff_t to, size_t len, return retlen; } -static int intel_spi_erase(struct spi_nor *nor, loff_t offs) +static int intel_spi_erase(struct intel_spi *ispi, u8 opcode, u32 offs) { - size_t erase_size, len = nor->mtd.erasesize; - struct intel_spi *ispi = nor->priv; u32 val, status, cmd; int ret; - /* If the hardware can do 64k erase use that when possible */ - if (len >= SZ_64K && ispi->erase_64k) { + switch (opcode) { + case SPINOR_OP_SE: cmd = HSFSTS_CTL_FCYCLE_ERASE_64K; - erase_size = SZ_64K; - } else { + break; + + case SPINOR_OP_BE_4K: cmd = HSFSTS_CTL_FCYCLE_ERASE; - erase_size = SZ_4K; + break; + + default: + return -EINVAL; } - if (ispi->swseq_erase) { - while (len > 0) { - writel(offs, ispi->base + FADDR); + writel(offs, ispi->base + FADDR); + + if (ispi->swseq_erase) + return intel_spi_sw_cycle(ispi, opcode, 0, + OPTYPE_WRITE_WITH_ADDR); + + /* Not needed with HW sequencer erase, make sure it is cleared */ + ispi->atomic_preopcode = 0; + + val = readl(ispi->base + HSFSTS_CTL); + val &= ~(HSFSTS_CTL_FDBC_MASK | HSFSTS_CTL_FCYCLE_MASK); + val |= HSFSTS_CTL_AEL | HSFSTS_CTL_FCERR | HSFSTS_CTL_FDONE; + val |= HSFSTS_CTL_FGO; + val |= cmd; + writel(val, ispi->base + HSFSTS_CTL); + + ret = intel_spi_wait_hw_busy(ispi); + if (ret) + return ret; + + status = readl(ispi->base + HSFSTS_CTL); + if (status & HSFSTS_CTL_FCERR) + return -EIO; + if (status & HSFSTS_CTL_AEL) + return -EACCES; - ret = intel_spi_sw_cycle(ispi, nor->erase_opcode, - 0, OPTYPE_WRITE_WITH_ADDR); - if (ret) - return ret; + return 0; +} - offs += erase_size; - len -= erase_size; +static bool intel_spi_supports_mem_op(struct spi_mem *mem, + const struct spi_mem_op *op) +{ + struct intel_spi *ispi = spi_master_get_devdata(mem->spi->master); + + if (op->cmd.dtr) + return false; + + /* + * The Intel controller supports widths up to 4 but it handles + * them automatically and does not expose them to software. Here + * we accept anything up to 4. + */ + if (op->cmd.buswidth > 4 || + (op->addr.nbytes && op->addr.buswidth > 4) || + (op->dummy.nbytes && op->dummy.buswidth > 4)) + return false; + + if (ispi->swseq_reg && ispi->locked) { + int i; + + /* Check if it is in the locked opcodes list */ + for (i = 0; i < ARRAY_SIZE(ispi->opcodes); i++) { + if (ispi->opcodes[i] == op->cmd.opcode) + goto check_opcode; } - return 0; + return false; } - /* Not needed with HW sequencer erase, make sure it is cleared */ - ispi->atomic_preopcode = 0; +check_opcode: + switch (op->cmd.opcode) { + case SPINOR_OP_RDID: + case SPINOR_OP_RDSR: + case SPINOR_OP_WRSR: + return true; - while (len > 0) { - writel(offs, ispi->base + FADDR); + case SPINOR_OP_READ: + case SPINOR_OP_READ_FAST: + case SPINOR_OP_READ_4B: + case SPINOR_OP_READ_FAST_4B: + return true; - val = readl(ispi->base + HSFSTS_CTL); - val &= ~(HSFSTS_CTL_FDBC_MASK | HSFSTS_CTL_FCYCLE_MASK); - val |= HSFSTS_CTL_AEL | HSFSTS_CTL_FCERR | HSFSTS_CTL_FDONE; - val |= cmd; - val |= HSFSTS_CTL_FGO; - writel(val, ispi->base + HSFSTS_CTL); + case SPINOR_OP_PP: + case SPINOR_OP_PP_4B: + case SPINOR_OP_WREN: + case SPINOR_OP_WRDI: + return true; - ret = intel_spi_wait_hw_busy(ispi); - if (ret) - return ret; + case SPINOR_OP_SE: + case SPINOR_OP_SE_4B: + return ispi->erase_64k; - status = readl(ispi->base + HSFSTS_CTL); - if (status & HSFSTS_CTL_FCERR) - return -EIO; - else if (status & HSFSTS_CTL_AEL) - return -EACCES; + case SPINOR_OP_BE_4K: + case SPINOR_OP_BE_4K_4B: + return true; + } - offs += erase_size; - len -= erase_size; + return false; +} + +static int intel_spi_exec_mem_op(struct spi_mem *mem, const struct spi_mem_op *op) +{ + struct intel_spi *ispi = spi_master_get_devdata(mem->spi->master); + size_t nbytes = op->data.nbytes; + u8 opcode = op->cmd.opcode; + + if (op->addr.nbytes) { + if (op->data.dir == SPI_MEM_DATA_IN) + return intel_spi_read(ispi, op->addr.val, nbytes, + op->data.buf.in); + if (op->data.dir == SPI_MEM_DATA_OUT) + return intel_spi_write(ispi, op->addr.val, nbytes, + op->data.buf.out); + if (op->data.dir == SPI_MEM_NO_DATA) + return intel_spi_erase(ispi, opcode, op->addr.val); + } else { + if (op->data.dir == SPI_MEM_DATA_IN) + return intel_spi_read_reg(ispi, opcode, op->data.buf.in, + nbytes); + if (op->data.dir == SPI_MEM_DATA_OUT) + return intel_spi_write_reg(ispi, opcode, op->data.buf.out, + nbytes); + if (op->data.dir == SPI_MEM_NO_DATA) + return intel_spi_write_reg(ispi, opcode, NULL, 0); } - return 0; + return -EINVAL; +} + +static const char *intel_spi_get_name(struct spi_mem *mem) +{ + const struct intel_spi *ispi = spi_master_get_devdata(mem->spi->master); + + /* + * Return name of the flash controller device to be compatible + * with the MTD version. + */ + return dev_name(ispi->dev); } +static const struct spi_controller_mem_ops intel_spi_mem_ops = { + .supports_op = intel_spi_supports_mem_op, + .exec_op = intel_spi_exec_mem_op, + .get_name = intel_spi_get_name, +}; + static bool intel_spi_is_protected(const struct intel_spi *ispi, unsigned int base, unsigned int limit) { @@ -896,70 +966,74 @@ static void intel_spi_fill_partition(struct intel_spi *ispi, } } -static const struct spi_nor_controller_ops intel_spi_controller_ops = { - .read_reg = intel_spi_read_reg, - .write_reg = intel_spi_write_reg, - .read = intel_spi_read, - .write = intel_spi_write, - .erase = intel_spi_erase, -}; +static int intel_spi_populate_chip(struct intel_spi *ispi) +{ + struct flash_platform_data *pdata; + struct spi_board_info chip; + + pdata = devm_kzalloc(ispi->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + pdata->nr_parts = 1; + pdata->parts = devm_kcalloc(ispi->dev, sizeof(*pdata->parts), + pdata->nr_parts, GFP_KERNEL); + if (!pdata->parts) + return -ENOMEM; + + intel_spi_fill_partition(ispi, pdata->parts); + + memset(&chip, 0, sizeof(chip)); + snprintf(chip.modalias, 8, "spi-nor"); + chip.platform_data = pdata; + + return spi_new_device(ispi->master, &chip) ? 0 : -ENODEV; +} -struct intel_spi *intel_spi_probe(struct device *dev, - struct resource *mem, const struct intel_spi_boardinfo *info) +/** + * intel_spi_probe() - Probe the Intel SPI flash controller + * @dev: Pointer to the parent device + * @mem: MMIO resource + * @info: Platform spefific information + * + * Probes Intel SPI flash controller and creates the flash chip device. + * Returns %0 on success and negative errno in case of failure. + */ +int intel_spi_probe(struct device *dev, struct resource *mem, + const struct intel_spi_boardinfo *info) { - const struct spi_nor_hwcaps hwcaps = { - .mask = SNOR_HWCAPS_READ | - SNOR_HWCAPS_READ_FAST | - SNOR_HWCAPS_PP, - }; - struct mtd_partition part; + struct spi_controller *master; struct intel_spi *ispi; int ret; - if (!info || !mem) - return ERR_PTR(-EINVAL); + master = devm_spi_alloc_master(dev, sizeof(*ispi)); + if (!master) + return -ENOMEM; + + master->mem_ops = &intel_spi_mem_ops; - ispi = devm_kzalloc(dev, sizeof(*ispi), GFP_KERNEL); - if (!ispi) - return ERR_PTR(-ENOMEM); + ispi = spi_master_get_devdata(master); ispi->base = devm_ioremap_resource(dev, mem); if (IS_ERR(ispi->base)) - return ERR_CAST(ispi->base); + return PTR_ERR(ispi->base); ispi->dev = dev; + ispi->master = master; ispi->info = info; ret = intel_spi_init(ispi); if (ret) - return ERR_PTR(ret); - - ispi->nor.dev = ispi->dev; - ispi->nor.priv = ispi; - ispi->nor.controller_ops = &intel_spi_controller_ops; - - ret = spi_nor_scan(&ispi->nor, NULL, &hwcaps); - if (ret) { - dev_info(dev, "failed to locate the chip\n"); - return ERR_PTR(ret); - } - - intel_spi_fill_partition(ispi, &part); + return ret; - ret = mtd_device_register(&ispi->nor.mtd, &part, 1); + ret = devm_spi_register_master(dev, master); if (ret) - return ERR_PTR(ret); + return ret; - return ispi; + return intel_spi_populate_chip(ispi); } EXPORT_SYMBOL_GPL(intel_spi_probe); -int intel_spi_remove(struct intel_spi *ispi) -{ - return mtd_device_unregister(&ispi->nor.mtd); -} -EXPORT_SYMBOL_GPL(intel_spi_remove); - MODULE_DESCRIPTION("Intel PCH/PCU SPI flash core driver"); MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/spi/spi-intel.h b/drivers/spi/spi-intel.h new file mode 100644 index 000000000000..40f947f6941a --- /dev/null +++ b/drivers/spi/spi-intel.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Intel PCH/PCU SPI flash driver. + * + * Copyright (C) 2016 - 2021, Intel Corporation + * Author: Mika Westerberg <mika.westerberg@linux.intel.com> + */ + +#ifndef SPI_INTEL_H +#define SPI_INTEL_H + +#include <linux/platform_data/x86/spi-intel.h> + +struct resource; + +int intel_spi_probe(struct device *dev, struct resource *mem, + const struct intel_spi_boardinfo *info); + +#endif /* SPI_INTEL_H */ diff --git a/include/linux/mfd/lpc_ich.h b/include/linux/mfd/lpc_ich.h index 39967a5eca6d..ea4a4b1b246a 100644 --- a/include/linux/mfd/lpc_ich.h +++ b/include/linux/mfd/lpc_ich.h @@ -8,7 +8,7 @@ #ifndef LPC_ICH_H #define LPC_ICH_H -#include <linux/platform_data/x86/intel-spi.h> +#include <linux/platform_data/x86/spi-intel.h> /* GPIO resources */ #define ICH_RES_GPIO 0 diff --git a/include/linux/platform_data/x86/intel-spi.h b/include/linux/platform_data/x86/spi-intel.h similarity index 89% rename from include/linux/platform_data/x86/intel-spi.h rename to include/linux/platform_data/x86/spi-intel.h index 7dda3f690465..a512ec37abbb 100644 --- a/include/linux/platform_data/x86/intel-spi.h +++ b/include/linux/platform_data/x86/spi-intel.h @@ -6,8 +6,8 @@ * Author: Mika Westerberg <mika.westerberg@linux.intel.com> */ -#ifndef INTEL_SPI_PDATA_H -#define INTEL_SPI_PDATA_H +#ifndef SPI_INTEL_PDATA_H +#define SPI_INTEL_PDATA_H enum intel_spi_type { INTEL_SPI_BYT = 1, @@ -28,4 +28,4 @@ struct intel_spi_boardinfo { void *data; }; -#endif /* INTEL_SPI_PDATA_H */ +#endif /* SPI_INTEL_PDATA_H */