| Message ID | 1565037226-1684-1-git-send-email-jcrouse@codeaurora.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] drivers: qcom: Add BCM vote macro to header | expand |
Quoting Jordan Crouse (2019-08-05 13:33:46) > The macro to generate a Bus Controller Manager (BCM) TCS command is used > by the interconnect driver but might also be interesting to other > drivers that need to construct TCS commands for sub processors so move > it out of the sdm845 specific file and into the header. > > Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> > --- Acked-by: Stephen Boyd <sboyd@kernel.org> Unless this is supposed to be applied by me? BTW, I wonder why we need an rpm clk driver much at all nowadays, except maybe for the XO clk state. The big user, from what I can tell, is the interconnect driver and we don't use any of the features of the clk framework besides the API to set a frequency. Maybe it would be better to just push push the bus frequency logic into interconnect code, then XO clk is the only thing we need to keep, and it can be a simple on/off thing.
On Wed, Aug 07, 2019 at 04:42:31PM -0700, Stephen Boyd wrote: > Quoting Jordan Crouse (2019-08-05 13:33:46) > > The macro to generate a Bus Controller Manager (BCM) TCS command is used > > by the interconnect driver but might also be interesting to other > > drivers that need to construct TCS commands for sub processors so move > > it out of the sdm845 specific file and into the header. > > > > Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> > > --- > > Acked-by: Stephen Boyd <sboyd@kernel.org> > > Unless this is supposed to be applied by me? I figured this landed in Bjorn's domain, but you guys can fight it out if you want. Jordan > BTW, I wonder why we need an rpm clk driver much at all nowadays, except > maybe for the XO clk state. The big user, from what I can tell, is the > interconnect driver and we don't use any of the features of the clk > framework besides the API to set a frequency. Maybe it would be better > to just push push the bus frequency logic into interconnect code, then > XO clk is the only thing we need to keep, and it can be a simple on/off > thing. >
Quoting Jordan Crouse (2019-08-13 11:47:17) > On Wed, Aug 07, 2019 at 04:42:31PM -0700, Stephen Boyd wrote: > > Quoting Jordan Crouse (2019-08-05 13:33:46) > > > The macro to generate a Bus Controller Manager (BCM) TCS command is used > > > by the interconnect driver but might also be interesting to other > > > drivers that need to construct TCS commands for sub processors so move > > > it out of the sdm845 specific file and into the header. > > > > > > Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> > > > --- > > > > Acked-by: Stephen Boyd <sboyd@kernel.org> > > > > Unless this is supposed to be applied by me? > > I figured this landed in Bjorn's domain, but you guys can fight it out if you > want. > Ok. I'm happy to avoid the fight!
On Mon 05 Aug 13:33 PDT 2019, Jordan Crouse wrote: > The macro to generate a Bus Controller Manager (BCM) TCS command is used > by the interconnect driver but might also be interesting to other > drivers that need to construct TCS commands for sub processors so move > it out of the sdm845 specific file and into the header. > > Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> (Discussed with Georgi, he will pick the patch) Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> Regards, Bjorn
On Wed 07 Aug 16:42 PDT 2019, Stephen Boyd wrote: > Quoting Jordan Crouse (2019-08-05 13:33:46) > > The macro to generate a Bus Controller Manager (BCM) TCS command is used > > by the interconnect driver but might also be interesting to other > > drivers that need to construct TCS commands for sub processors so move > > it out of the sdm845 specific file and into the header. > > > > Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> > > --- > > Acked-by: Stephen Boyd <sboyd@kernel.org> > > Unless this is supposed to be applied by me? > > BTW, I wonder why we need an rpm clk driver much at all nowadays, except > maybe for the XO clk state. The big user, from what I can tell, is the > interconnect driver and we don't use any of the features of the clk > framework besides the API to set a frequency. Maybe it would be better > to just push push the bus frequency logic into interconnect code, then > XO clk is the only thing we need to keep, and it can be a simple on/off > thing. > There's been a number of cases where we'll need to enable the buffered XOs, but perhaps these are handled by other subsystems these days(?) If so the one case that remains would be the operation of explicitly holding CXO enabled during operations such as booting the remoteprocs. Regards, Bjorn
Quoting Bjorn Andersson (2019-08-19 09:52:55) > On Wed 07 Aug 16:42 PDT 2019, Stephen Boyd wrote: > > > Quoting Jordan Crouse (2019-08-05 13:33:46) > > > The macro to generate a Bus Controller Manager (BCM) TCS command is used > > > by the interconnect driver but might also be interesting to other > > > drivers that need to construct TCS commands for sub processors so move > > > it out of the sdm845 specific file and into the header. > > > > > > Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> > > > --- > > > > Acked-by: Stephen Boyd <sboyd@kernel.org> > > > > Unless this is supposed to be applied by me? > > > > BTW, I wonder why we need an rpm clk driver much at all nowadays, except > > maybe for the XO clk state. The big user, from what I can tell, is the > > interconnect driver and we don't use any of the features of the clk > > framework besides the API to set a frequency. Maybe it would be better > > to just push push the bus frequency logic into interconnect code, then > > XO clk is the only thing we need to keep, and it can be a simple on/off > > thing. > > > > There's been a number of cases where we'll need to enable the buffered > XOs, but perhaps these are handled by other subsystems these days(?) > > If so the one case that remains would be the operation of explicitly > holding CXO enabled during operations such as booting the remoteprocs. > Yes I think the XO (and the buffers) is the only thing that we really seem to care about for the clk tree. Otherwise, the sole user is interconnect code and thus handling it in the rpmh clk driver doesn't really gain us anything. In fact, it just makes it worse because it ties the clk tree up with things that could take a while to process on the RPM side.
diff --git a/drivers/clk/qcom/clk-rpmh.c b/drivers/clk/qcom/clk-rpmh.c index c3fd632..a32bfae 100644 --- a/drivers/clk/qcom/clk-rpmh.c +++ b/drivers/clk/qcom/clk-rpmh.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Copyright (c) 2018, The Linux Foundation. All rights reserved. + * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved. */ #include <linux/clk-provider.h> @@ -12,23 +12,13 @@ #include <linux/platform_device.h> #include <soc/qcom/cmd-db.h> #include <soc/qcom/rpmh.h> +#include <soc/qcom/tcs.h> #include <dt-bindings/clock/qcom,rpmh.h> #define CLK_RPMH_ARC_EN_OFFSET 0 #define CLK_RPMH_VRM_EN_OFFSET 4 -#define BCM_TCS_CMD_COMMIT_MASK 0x40000000 -#define BCM_TCS_CMD_VALID_SHIFT 29 -#define BCM_TCS_CMD_VOTE_MASK 0x3fff -#define BCM_TCS_CMD_VOTE_SHIFT 0 - -#define BCM_TCS_CMD(valid, vote) \ - (BCM_TCS_CMD_COMMIT_MASK | \ - ((valid) << BCM_TCS_CMD_VALID_SHIFT) | \ - ((vote & BCM_TCS_CMD_VOTE_MASK) \ - << BCM_TCS_CMD_VOTE_SHIFT)) - /** * struct bcm_db - Auxiliary data pertaining to each Bus Clock Manager(BCM) * @unit: divisor used to convert Hz value to an RPMh msg @@ -269,7 +259,7 @@ static int clk_rpmh_bcm_send_cmd(struct clk_rpmh *c, bool enable) } cmd.addr = c->res_addr; - cmd.data = BCM_TCS_CMD(enable, cmd_state); + cmd.data = BCM_TCS_CMD(1, enable, 0, cmd_state); ret = rpmh_write_async(c->dev, RPMH_ACTIVE_ONLY_STATE, &cmd, 1); if (ret) { diff --git a/drivers/interconnect/qcom/sdm845.c b/drivers/interconnect/qcom/sdm845.c index 4915b78..2181170 100644 --- a/drivers/interconnect/qcom/sdm845.c +++ b/drivers/interconnect/qcom/sdm845.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Copyright (c) 2018, The Linux Foundation. All rights reserved. + * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved. * */ @@ -20,23 +20,6 @@ #include <soc/qcom/rpmh.h> #include <soc/qcom/tcs.h> -#define BCM_TCS_CMD_COMMIT_SHFT 30 -#define BCM_TCS_CMD_COMMIT_MASK 0x40000000 -#define BCM_TCS_CMD_VALID_SHFT 29 -#define BCM_TCS_CMD_VALID_MASK 0x20000000 -#define BCM_TCS_CMD_VOTE_X_SHFT 14 -#define BCM_TCS_CMD_VOTE_MASK 0x3fff -#define BCM_TCS_CMD_VOTE_Y_SHFT 0 -#define BCM_TCS_CMD_VOTE_Y_MASK 0xfffc000 - -#define BCM_TCS_CMD(commit, valid, vote_x, vote_y) \ - (((commit) << BCM_TCS_CMD_COMMIT_SHFT) | \ - ((valid) << BCM_TCS_CMD_VALID_SHFT) | \ - ((cpu_to_le32(vote_x) & \ - BCM_TCS_CMD_VOTE_MASK) << BCM_TCS_CMD_VOTE_X_SHFT) | \ - ((cpu_to_le32(vote_y) & \ - BCM_TCS_CMD_VOTE_MASK) << BCM_TCS_CMD_VOTE_Y_SHFT)) - #define to_qcom_provider(_provider) \ container_of(_provider, struct qcom_icc_provider, provider) diff --git a/include/soc/qcom/tcs.h b/include/soc/qcom/tcs.h index 262876a..dbf3c88 100644 --- a/include/soc/qcom/tcs.h +++ b/include/soc/qcom/tcs.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0 */ /* - * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. + * Copyright (c) 2016-2019, The Linux Foundation. All rights reserved. */ #ifndef __SOC_QCOM_TCS_H__ @@ -53,4 +53,23 @@ struct tcs_request { struct tcs_cmd *cmds; }; +#define BCM_TCS_CMD_COMMIT_SHFT 30 +#define BCM_TCS_CMD_COMMIT_MASK 0x40000000 +#define BCM_TCS_CMD_VALID_SHFT 29 +#define BCM_TCS_CMD_VALID_MASK 0x20000000 +#define BCM_TCS_CMD_VOTE_X_SHFT 14 +#define BCM_TCS_CMD_VOTE_MASK 0x3fff +#define BCM_TCS_CMD_VOTE_Y_SHFT 0 +#define BCM_TCS_CMD_VOTE_Y_MASK 0xfffc000 + +/* Construct a Bus Clock Manager (BCM) specific TCS command */ +#define BCM_TCS_CMD(commit, valid, vote_x, vote_y) \ + (((commit) << BCM_TCS_CMD_COMMIT_SHFT) | \ + ((valid) << BCM_TCS_CMD_VALID_SHFT) | \ + ((cpu_to_le32(vote_x) & \ + BCM_TCS_CMD_VOTE_MASK) << BCM_TCS_CMD_VOTE_X_SHFT) | \ + ((cpu_to_le32(vote_y) & \ + BCM_TCS_CMD_VOTE_MASK) << BCM_TCS_CMD_VOTE_Y_SHFT)) + + #endif /* __SOC_QCOM_TCS_H__ */
The macro to generate a Bus Controller Manager (BCM) TCS command is used by the interconnect driver but might also be interesting to other drivers that need to construct TCS commands for sub processors so move it out of the sdm845 specific file and into the header. Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> --- Changes in v2: - Replace a similar BCS_TCS_CMD macro in clk-rpmh.c with the generic one drivers/clk/qcom/clk-rpmh.c | 16 +++------------- drivers/interconnect/qcom/sdm845.c | 19 +------------------ include/soc/qcom/tcs.h | 21 ++++++++++++++++++++- 3 files changed, 24 insertions(+), 32 deletions(-)