Move legacy spi_get_bus_and_cs() code to _spi_get_bus_and_cs().
Add new spi_get_bus_and_cs() implementation which rely on DT for speed and mode and don't need any drv_name nor dev_name parameters. This will prepare the ground for next patch.
Update all callers to use _spi_get_bus_and_cs() to keep the same behavior.
Signed-off-by: Patrice Chotard patrice.chotard@foss.st.com
Cc: Marek Behun marek.behun@nic.cz Cc: Jagan Teki jagan@amarulasolutions.com Cc: Vignesh R vigneshr@ti.com Cc: Joe Hershberger joe.hershberger@ni.com Cc: Ramon Fried rfried.dev@gmail.com Cc: Lukasz Majewski lukma@denx.de Cc: Marek Vasut marex@denx.de Cc: Wolfgang Denk wd@denx.de Cc: Simon Glass sjg@chromium.org Cc: Stefan Roese sr@denx.de Cc: "Pali Rohár" pali@kernel.org Cc: Konstantin Porotchkin kostap@marvell.com Cc: Igal Liberman igall@marvell.com Cc: Bin Meng bmeng.cn@gmail.com Cc: Pratyush Yadav p.yadav@ti.com Cc: Sean Anderson seanga2@gmail.com Cc: Anji J anji.jagarlmudi@nxp.com Cc: Biwen Li biwen.li@nxp.com Cc: Priyanka Jain priyanka.jain@nxp.com Cc: Chaitanya Sakinam chaitanya.sakinam@nxp.com ---
(no changes since v1)
board/CZ.NIC/turris_mox/turris_mox.c | 6 +-- cmd/spi.c | 4 +- drivers/mtd/spi/sf-uclass.c | 2 +- drivers/spi/spi-uclass.c | 66 +++++++++++++++++++++++++--- drivers/usb/gadget/max3420_udc.c | 4 +- include/spi.h | 19 +++++++- test/dm/spi.c | 33 +++++++------- 7 files changed, 104 insertions(+), 30 deletions(-)
diff --git a/board/CZ.NIC/turris_mox/turris_mox.c b/board/CZ.NIC/turris_mox/turris_mox.c index 8888a2dcab..812cf7d8e3 100644 --- a/board/CZ.NIC/turris_mox/turris_mox.c +++ b/board/CZ.NIC/turris_mox/turris_mox.c @@ -148,9 +148,9 @@ static int mox_do_spi(u8 *in, u8 *out, size_t size) struct udevice *dev; int ret;
- ret = spi_get_bus_and_cs(0, 1, 1000000, SPI_CPHA | SPI_CPOL, - "spi_generic_drv", "moxtet@1", &dev, - &slave); + ret = _spi_get_bus_and_cs(0, 1, 1000000, SPI_CPHA | SPI_CPOL, + "spi_generic_drv", "moxtet@1", &dev, + &slave); if (ret) goto fail;
diff --git a/cmd/spi.c b/cmd/spi.c index 6dc32678da..454ebe37d7 100644 --- a/cmd/spi.c +++ b/cmd/spi.c @@ -46,8 +46,8 @@ static int do_spi_xfer(int bus, int cs) str = strdup(name); if (!str) return -ENOMEM; - ret = spi_get_bus_and_cs(bus, cs, freq, mode, "spi_generic_drv", - str, &dev, &slave); + ret = _spi_get_bus_and_cs(bus, cs, freq, mode, "spi_generic_drv", + str, &dev, &slave); if (ret) return ret; #else diff --git a/drivers/mtd/spi/sf-uclass.c b/drivers/mtd/spi/sf-uclass.c index 63d16291ff..b45ba54ebf 100644 --- a/drivers/mtd/spi/sf-uclass.c +++ b/drivers/mtd/spi/sf-uclass.c @@ -74,7 +74,7 @@ int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs, snprintf(name, sizeof(name), "spi_flash@%d:%d", busnum, cs); str = strdup(name); #endif - ret = spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode, + ret = _spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode, "jedec_spi_nor", str, &bus, &slave); if (ret) return ret; diff --git a/drivers/spi/spi-uclass.c b/drivers/spi/spi-uclass.c index f8ec312d71..f2791c4b88 100644 --- a/drivers/spi/spi-uclass.c +++ b/drivers/spi/spi-uclass.c @@ -340,9 +340,65 @@ int spi_find_bus_and_cs(int busnum, int cs, struct udevice **busp, return ret; }
-int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode, - const char *drv_name, const char *dev_name, - struct udevice **busp, struct spi_slave **devp) +int spi_get_bus_and_cs(int busnum, int cs, struct udevice **busp, + struct spi_slave **devp) +{ + struct udevice *bus, *dev; + struct dm_spi_bus *bus_data; + struct spi_slave *slave; + int ret; + +#if CONFIG_IS_ENABLED(OF_PLATDATA) + ret = uclass_first_device_err(UCLASS_SPI, &bus); +#else + ret = uclass_get_device_by_seq(UCLASS_SPI, busnum, &bus); +#endif + if (ret) { + log_err("Invalid bus %d (err=%d)\n", busnum, ret); + return ret; + } + ret = spi_find_chip_select(bus, cs, &dev); + if (ret) { + dev_err(bus, "Invalid chip select %d:%d (err=%d)\n", busnum, cs, ret); + return ret; + } + + if (!device_active(dev)) { + struct spi_slave *slave; + + ret = device_probe(dev); + if (ret) + goto err; + slave = dev_get_parent_priv(dev); + slave->dev = dev; + } + + slave = dev_get_parent_priv(dev); + bus_data = dev_get_uclass_priv(bus); + + /* + * In case the operation speed is not yet established by + * dm_spi_claim_bus() ensure the bus is configured properly. + */ + if (!bus_data->speed) { + ret = spi_claim_bus(slave); + if (ret) + goto err; + } + *busp = bus; + *devp = slave; + + return 0; + +err: + log_debug("%s: Error path, device '%s'\n", __func__, dev->name); + + return ret; +} + +int _spi_get_bus_and_cs(int busnum, int cs, int speed, int mode, + const char *drv_name, const char *dev_name, + struct udevice **busp, struct spi_slave **devp) { struct udevice *bus, *dev; struct dm_spi_slave_plat *plat; @@ -453,8 +509,8 @@ struct spi_slave *spi_setup_slave(unsigned int busnum, unsigned int cs, struct udevice *dev; int ret;
- ret = spi_get_bus_and_cs(busnum, cs, speed, mode, NULL, 0, &dev, - &slave); + ret = _spi_get_bus_and_cs(busnum, cs, speed, mode, NULL, 0, &dev, + &slave); if (ret) return NULL;
diff --git a/drivers/usb/gadget/max3420_udc.c b/drivers/usb/gadget/max3420_udc.c index a16095f892..fa655c98dc 100644 --- a/drivers/usb/gadget/max3420_udc.c +++ b/drivers/usb/gadget/max3420_udc.c @@ -830,8 +830,8 @@ static int max3420_udc_probe(struct udevice *dev) cs = slave_pdata->cs; speed = slave_pdata->max_hz; mode = slave_pdata->mode; - spi_get_bus_and_cs(busnum, cs, speed, mode, "spi_generic_drv", - NULL, &spid, &udc->slave); + _spi_get_bus_and_cs(busnum, cs, speed, mode, false, "spi_generic_drv", + NULL, &spid, &udc->slave);
udc->dev = dev; udc->gadget.ep0 = &udc->ep[0].ep_usb; diff --git a/include/spi.h b/include/spi.h index fa9ab12dbe..9a8c1fb260 100644 --- a/include/spi.h +++ b/include/spi.h @@ -572,6 +572,23 @@ int spi_find_bus_and_cs(int busnum, int cs, struct udevice **busp, * Given a bus number and chip select, this finds the corresponding bus * device and slave device. * + * @busnum: SPI bus number + * @cs: Chip select to look for + * @busp: Returns bus device + * @devp: Return slave device + * @return 0 if found, -ve on error + */ +int spi_get_bus_and_cs(int busnum, int cs, + struct udevice **busp, struct spi_slave **devp); + +/** + * _spi_get_bus_and_cs() - Find and activate bus and slave devices by number + * As spi_flash_probe(), This is an old-style function. We should remove + * it when all SPI flash drivers use dm + * + * Given a bus number and chip select, this finds the corresponding bus + * device and slave device. + * * If no such slave exists, and drv_name is not NULL, then a new slave device * is automatically bound on this chip select with requested speed and mode. * @@ -588,7 +605,7 @@ int spi_find_bus_and_cs(int busnum, int cs, struct udevice **busp, * @devp: Return slave device * Return: 0 if found, -ve on error */ -int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode, +int _spi_get_bus_and_cs(int busnum, int cs, int speed, int mode, const char *drv_name, const char *dev_name, struct udevice **busp, struct spi_slave **devp);
diff --git a/test/dm/spi.c b/test/dm/spi.c index ee4ad3abaa..7ab0820abb 100644 --- a/test/dm/spi.c +++ b/test/dm/spi.c @@ -46,19 +46,19 @@ static int dm_test_spi_find(struct unit_test_state *uts)
/* This finds nothing because we removed the device */ ut_asserteq(-ENODEV, spi_find_bus_and_cs(busnum, cs, &bus, &dev)); - ut_asserteq(-ENODEV, spi_get_bus_and_cs(busnum, cs, speed, mode, - NULL, 0, &bus, &slave)); + ut_asserteq(-ENODEV, _spi_get_bus_and_cs(busnum, cs, speed, mode, + NULL, 0, &bus, &slave));
/* * This forces the device to be re-added, but there is no emulation * connected so the probe will fail. We require that bus is left - * alone on failure, and that the spi_get_bus_and_cs() does not add + * alone on failure, and that the _spi_get_bus_and_cs() does not add * a 'partially-inited' device. */ ut_asserteq(-ENODEV, spi_find_bus_and_cs(busnum, cs, &bus, &dev)); - ut_asserteq(-ENOENT, spi_get_bus_and_cs(busnum, cs, speed, mode, - "jedec_spi_nor", "name", &bus, - &slave)); + ut_asserteq(-ENOENT, _spi_get_bus_and_cs(busnum, cs, speed, mode, + "jedec_spi_nor", "name", &bus, + &slave)); sandbox_sf_unbind_emul(state_get_current(), busnum, cs); ut_assertok(spi_cs_info(bus, cs, &info)); ut_asserteq_ptr(NULL, info.dev); @@ -67,8 +67,8 @@ static int dm_test_spi_find(struct unit_test_state *uts) ut_assertok(sandbox_sf_bind_emul(state, busnum, cs, bus, node, "name")); ut_assertok(spi_find_bus_and_cs(busnum, cs, &bus, &dev)); - ut_assertok(spi_get_bus_and_cs(busnum, cs, speed, mode, - "jedec_spi_nor", "name", &bus, &slave)); + ut_assertok(_spi_get_bus_and_cs(busnum, cs, speed, mode, + "jedec_spi_nor", "name", &bus, &slave));
ut_assertok(spi_cs_info(bus, cs, &info)); ut_asserteq_ptr(info.dev, slave->dev); @@ -76,8 +76,9 @@ static int dm_test_spi_find(struct unit_test_state *uts) /* We should be able to add something to another chip select */ ut_assertok(sandbox_sf_bind_emul(state, busnum, cs_b, bus, node, "name")); - ut_asserteq(-EINVAL, spi_get_bus_and_cs(busnum, cs_b, speed, mode, - "jedec_spi_nor", "name", &bus, &slave)); + ut_asserteq(-EINVAL, _spi_get_bus_and_cs(busnum, cs_b, speed, mode, + "jedec_spi_nor", "name", &bus, + &slave)); ut_asserteq(-EINVAL, spi_cs_info(bus, cs_b, &info)); ut_asserteq_ptr(NULL, info.dev);
@@ -145,11 +146,11 @@ static int dm_test_spi_claim_bus(struct unit_test_state *uts) const int busnum = 0, cs_a = 0, cs_b = 1, mode = 0;
/* Get spi slave on CS0 */ - ut_assertok(spi_get_bus_and_cs(busnum, cs_a, 1000000, mode, NULL, 0, - &bus, &slave_a)); + ut_assertok(_spi_get_bus_and_cs(busnum, cs_a, 1000000, mode, NULL, 0, + &bus, &slave_a)); /* Get spi slave on CS1 */ - ut_assertok(spi_get_bus_and_cs(busnum, cs_b, 1000000, mode, NULL, 0, - &bus, &slave_b)); + ut_assertok(_spi_get_bus_and_cs(busnum, cs_b, 1000000, mode, NULL, 0, + &bus, &slave_b));
/* Different max_hz, different mode. */ ut_assert(slave_a->max_hz != slave_b->max_hz); @@ -182,8 +183,8 @@ static int dm_test_spi_xfer(struct unit_test_state *uts) const char dout[5] = {0x9f}; unsigned char din[5];
- ut_assertok(spi_get_bus_and_cs(busnum, cs, 1000000, mode, NULL, 0, - &bus, &slave)); + ut_assertok(_spi_get_bus_and_cs(busnum, cs, 1000000, mode, NULL, 0, + &bus, &slave)); ut_assertok(spi_claim_bus(slave)); ut_assertok(spi_xfer(slave, 40, dout, din, SPI_XFER_BEGIN | SPI_XFER_END));