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author | Stijn Tintel <stijn@linux-ipv6.be> | 2018-11-10 13:03:18 +0200 |
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committer | Stijn Tintel <stijn@linux-ipv6.be> | 2018-12-18 23:19:21 +0200 |
commit | f5919b65d4c671fd5083838c7a445f319f9a13c8 (patch) | |
tree | 2c791d2a5dea5bbbb0b85f86f74afce2647c0726 /target/linux/brcm2708/patches-4.14/950-0028-clk-bcm2835-Read-max-core-clock-from-firmware.patch | |
parent | 822b4c3b250a254e74407056ccfd5c6aa38da162 (diff) | |
download | upstream-f5919b65d4c671fd5083838c7a445f319f9a13c8.tar.gz upstream-f5919b65d4c671fd5083838c7a445f319f9a13c8.tar.bz2 upstream-f5919b65d4c671fd5083838c7a445f319f9a13c8.zip |
brcm2708: add kernel 4.14 support
Patch generation process:
- rebase rpi/rpi-4.14.y on v4.14.89 from linux-stable
- git format-patch v4.14.89
Patches skipped during rebase:
- lan78xx: Read MAC address from DT if present
- lan78xx: Enable LEDs and auto-negotiation
- Revert "softirq: Let ksoftirqd do its job"
- sc16is7xx: Fix for multi-channel stall
- lan78xx: Ignore DT MAC address if already valid
- lan78xx: Simple patch to prevent some crashes
- tcp_write_queue_purge clears all the SKBs in the write queue
- Revert "lan78xx: Simple patch to prevent some crashes"
- lan78xx: Connect phy early
- Arm: mm: ftrace: Only set text back to ro after kernel has been marked ro
- Revert "Revert "softirq: Let ksoftirqd do its job""
- ASoC: cs4265: SOC_SINGLE register value error fix
- Revert "ASoC: cs4265: SOC_SINGLE register value error fix"
- Revert "net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends"
- Revert "Revert "net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends""
Patches dropped after rebase:
- net: Add non-mainline source for rtl8192cu wlan
- net: Fix rtl8192cu build errors on other platforms
- brcm: adds support for BCM43341 wifi
- brcmfmac: Mute expected startup 'errors'
- ARM64: Fix build break for RTL8187/RTL8192CU wifi
- ARM64: Enable RTL8187/RTL8192CU wifi in build config
- This is the driver for Sony CXD2880 DVB-T2/T tuner + demodulator
- brcmfmac: add CLM download support
- brcmfmac: request_firmware_direct is quieter
- Sets the BCDC priority to constant 0
- brcmfmac: Disable ARP offloading when promiscuous
- brcmfmac: Avoid possible out-of-bounds read
- brcmfmac: Delete redundant length check
- net: rtl8192cu: Normalize indentation
- net: rtl8192cu: Fix implicit fallthrough warnings
- Revert "Sets the BCDC priority to constant 0"
- media: cxd2880: Bump to match 4.18.y version
- media: cxd2880-spi: Bump to match 4.18.y version
- Revert "mm: alloc_contig: re-allow CMA to compact FS pages"
- Revert "Revert "mm: alloc_contig: re-allow CMA to compact FS pages""
- cxd2880: CXD2880_SPI_DRV should select DVB_CXD2880 with
MEDIA_SUBDRV_AUTOSELECT
- 950-0421-HID-hid-bigbenff-driver-for-BigBen-Interactive-PS3OF.patch
- 950-0453-Add-hid-bigbenff-to-list-of-have_special_driver-for-.patch
Make I2C built-in instead of modular as in upstream defconfig; also the
easiest way to get MFD_ARIZONA enabled, which is required by
kmod-sound-soc-rpi-cirrus.
Add missing compatible strings from
4.9/960-add-rasbperrypi-compatible.patch, using upstream names for
compute modules.
Add extra patch to enable the LEDs on lan78xx.
Compile-tested: bcm2708, bcm2709, bcm2710 (with CONFIG_ALL_KMODS=y)
Runtime-tested: bcm2708, bcm2710
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0028-clk-bcm2835-Read-max-core-clock-from-firmware.patch')
-rw-r--r-- | target/linux/brcm2708/patches-4.14/950-0028-clk-bcm2835-Read-max-core-clock-from-firmware.patch | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0028-clk-bcm2835-Read-max-core-clock-from-firmware.patch b/target/linux/brcm2708/patches-4.14/950-0028-clk-bcm2835-Read-max-core-clock-from-firmware.patch new file mode 100644 index 0000000000..b232c0c139 --- /dev/null +++ b/target/linux/brcm2708/patches-4.14/950-0028-clk-bcm2835-Read-max-core-clock-from-firmware.patch @@ -0,0 +1,115 @@ +From a3927566a6d90268423ae58aad12a71b9bf39dd9 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Mon, 6 Mar 2017 09:06:18 +0000 +Subject: [PATCH 028/454] clk-bcm2835: Read max core clock from firmware + +The VPU is responsible for managing the core clock, usually under +direction from the bcm2835-cpufreq driver but not via the clk-bcm2835 +driver. Since the core frequency can change without warning, it is +safer to report the maximum clock rate to users of the core clock - +I2C, SPI and the mini UART - to err on the safe side when calculating +clock divisors. + +If the DT node for the clock driver includes a reference to the +firmware node, use the firmware API to query the maximum core clock +instead of reading the divider registers. + +Prior to this patch, a "100KHz" I2C bus was sometimes clocked at about +160KHz. In particular, switching to the 4.9 kernel was likely to break +SenseHAT usage on a Pi3. + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + drivers/clk/bcm/clk-bcm2835.c | 39 ++++++++++++++++++++++++++++++++++- + 1 file changed, 38 insertions(+), 1 deletion(-) + +--- a/drivers/clk/bcm/clk-bcm2835.c ++++ b/drivers/clk/bcm/clk-bcm2835.c +@@ -45,6 +45,7 @@ + #include <linux/platform_device.h> + #include <linux/slab.h> + #include <dt-bindings/clock/bcm2835.h> ++#include <soc/bcm2835/raspberrypi-firmware.h> + + #define CM_PASSWORD 0x5a000000 + +@@ -299,6 +300,8 @@ + #define LOCK_TIMEOUT_NS 100000000 + #define BCM2835_MAX_FB_RATE 1750000000u + ++#define VCMSG_ID_CORE_CLOCK 4 ++ + /* + * Names of clocks used within the driver that need to be replaced + * with an external parent's name. This array is in the order that +@@ -317,6 +320,7 @@ static const char *const cprman_parent_n + struct bcm2835_cprman { + struct device *dev; + void __iomem *regs; ++ struct rpi_firmware *fw; + spinlock_t regs_lock; /* spinlock for all clocks */ + + /* +@@ -1032,6 +1036,30 @@ static unsigned long bcm2835_clock_get_r + return bcm2835_clock_rate_from_divisor(clock, parent_rate, div); + } + ++static unsigned long bcm2835_clock_get_rate_vpu(struct clk_hw *hw, ++ unsigned long parent_rate) ++{ ++ struct bcm2835_clock *clock = bcm2835_clock_from_hw(hw); ++ struct bcm2835_cprman *cprman = clock->cprman; ++ ++ if (cprman->fw) { ++ struct { ++ u32 id; ++ u32 val; ++ } packet; ++ ++ packet.id = VCMSG_ID_CORE_CLOCK; ++ packet.val = 0; ++ ++ if (!rpi_firmware_property(cprman->fw, ++ RPI_FIRMWARE_GET_MAX_CLOCK_RATE, ++ &packet, sizeof(packet))) ++ return packet.val; ++ } ++ ++ return bcm2835_clock_get_rate(hw, parent_rate); ++} ++ + static void bcm2835_clock_wait_busy(struct bcm2835_clock *clock) + { + struct bcm2835_cprman *cprman = clock->cprman; +@@ -1321,7 +1349,7 @@ static int bcm2835_vpu_clock_is_on(struc + */ + static const struct clk_ops bcm2835_vpu_clock_clk_ops = { + .is_prepared = bcm2835_vpu_clock_is_on, +- .recalc_rate = bcm2835_clock_get_rate, ++ .recalc_rate = bcm2835_clock_get_rate_vpu, + .set_rate = bcm2835_clock_set_rate, + .determine_rate = bcm2835_clock_determine_rate, + .set_parent = bcm2835_clock_set_parent, +@@ -2201,6 +2229,7 @@ static int bcm2835_clk_probe(struct plat + struct resource *res; + const struct bcm2835_clk_desc *desc; + const size_t asize = ARRAY_SIZE(clk_desc_array); ++ struct device_node *fw_node; + size_t i; + u32 clk_id; + int ret; +@@ -2218,6 +2247,14 @@ static int bcm2835_clk_probe(struct plat + if (IS_ERR(cprman->regs)) + return PTR_ERR(cprman->regs); + ++ fw_node = of_parse_phandle(dev->of_node, "firmware", 0); ++ if (fw_node) { ++ struct rpi_firmware *fw = rpi_firmware_get(NULL); ++ if (!fw) ++ return -EPROBE_DEFER; ++ cprman->fw = fw; ++ } ++ + memset(bcm2835_clk_claimed, 0, sizeof(bcm2835_clk_claimed)); + for (i = 0; + !of_property_read_u32_index(pdev->dev.of_node, "claim-clocks", |