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clk: actions: Fix bisp_factor_table based clocks on Owl S500 SoC 

[ Upstream commit a8f1f03caa51aa7a69c671aa87c475034db7d368 ]

The following clocks of the Actions Semi Owl S500 SoC have been defined
to use a shared clock factor table 'bisp_factor_table[]': DE[1-2], VCE,
VDE, BISP, SENSOR[0-1]

There are several issues involved in this approach:

* 'bisp_factor_table[]' describes the configuration of a regular 8-rates
  divider, so its usage is redundant. Additionally, judging by the BISP
  clock context, it is incomplete since it maps only 8 out of 12
  possible entries.

* The clocks mentioned above are not identical in terms of the available
  rates, therefore cannot rely on the same factor table. Specifically,
  BISP and SENSOR* are standard 12-rate dividers so their configuration
  should rely on a proper clock div table, while VCE and VDE require a
  factor table that is a actually a subset of the one needed for DE[1-2]
  clocks.

Let's fix this by implementing the following:

* Add new factor tables 'de_factor_table' and 'hde_factor_table' to
  properly handle DE[1-2], VCE and VDE clocks.

* Add a common div table 'std12rate_div_table' for BISP and SENSOR[0-1]
  clocks converted to OWL_COMP_DIV.

* Drop the now unused 'bisp_factor_table[]'.

Additionally, drop the CLK_IGNORE_UNUSED flag for SENSOR[0-1] since
there is no reason to always keep ON those clocks.

Fixes: ed6b4795ec ("clk: actions: Add clock driver for S500 SoC")
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/e675820a46cd9930d8d576c6cae61d41c1a8416f.1623354574.git.cristian.ciocaltea@gmail.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Cristian Ciocaltea 2021-06-10 23:05:23 +03:00 committed by Greg Kroah-Hartman
parent a7aefa1a17
commit 80bd119c7d
1 changed files with 29 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
drivers/clk/actions/owl-s500.c
View File

@ -138,9 +138,16 @@ static struct clk_factor_table sd_factor_table[] = {
{ 0, 0, 0 },
};
static struct clk_factor_table bisp_factor_table[] = {
{ 0, 1, 1 }, { 1, 1, 2 }, { 2, 1, 3 }, { 3, 1, 4 },
{ 4, 1, 5 }, { 5, 1, 6 }, { 6, 1, 7 }, { 7, 1, 8 },
static struct clk_factor_table de_factor_table[] = {
{ 0, 1, 1 }, { 1, 2, 3 }, { 2, 1, 2 }, { 3, 2, 5 },
{ 4, 1, 3 }, { 5, 1, 4 }, { 6, 1, 6 }, { 7, 1, 8 },
{ 8, 1, 12 },
{ 0, 0, 0 },
};
static struct clk_factor_table hde_factor_table[] = {
{ 0, 1, 1 }, { 1, 2, 3 }, { 2, 1, 2 }, { 3, 2, 5 },
{ 4, 1, 3 }, { 5, 1, 4 }, { 6, 1, 6 }, { 7, 1, 8 },
{ 0, 0, 0 },
};
@ -154,6 +161,13 @@ static struct clk_div_table rmii_ref_div_table[] = {
{ 0, 0 },
};
static struct clk_div_table std12rate_div_table[] = {
{ 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 4 },
{ 4, 5 }, { 5, 6 }, { 6, 7 }, { 7, 8 },
{ 8, 9 }, { 9, 10 }, { 10, 11 }, { 11, 12 },
{ 0, 0 },
};
static struct clk_div_table i2s_div_table[] = {
{ 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 4 },
{ 4, 6 }, { 5, 8 }, { 6, 12 }, { 7, 16 },
@ -186,39 +200,39 @@ static OWL_DIVIDER(rmii_ref_clk, "rmii_ref_clk", "ethernet_pll_clk", CMU_ETHERNE
/* factor clocks */
static OWL_FACTOR(ahb_clk, "ahb_clk", "h_clk", CMU_BUSCLK1, 2, 2, ahb_factor_table, 0, 0);
static OWL_FACTOR(de1_clk, "de_clk1", "de_clk", CMU_DECLK, 0, 3, bisp_factor_table, 0, 0);
static OWL_FACTOR(de2_clk, "de_clk2", "de_clk", CMU_DECLK, 4, 3, bisp_factor_table, 0, 0);
static OWL_FACTOR(de1_clk, "de_clk1", "de_clk", CMU_DECLK, 0, 4, de_factor_table, 0, 0);
static OWL_FACTOR(de2_clk, "de_clk2", "de_clk", CMU_DECLK, 4, 4, de_factor_table, 0, 0);
/* composite clocks */
static OWL_COMP_FACTOR(vce_clk, "vce_clk", hde_clk_mux_p,
OWL_MUX_HW(CMU_VCECLK, 4, 2),
OWL_GATE_HW(CMU_DEVCLKEN0, 26, 0),
OWL_FACTOR_HW(CMU_VCECLK, 0, 3, 0, bisp_factor_table),
OWL_FACTOR_HW(CMU_VCECLK, 0, 3, 0, hde_factor_table),
0);
static OWL_COMP_FACTOR(vde_clk, "vde_clk", hde_clk_mux_p,
OWL_MUX_HW(CMU_VDECLK, 4, 2),
OWL_GATE_HW(CMU_DEVCLKEN0, 25, 0),
OWL_FACTOR_HW(CMU_VDECLK, 0, 3, 0, bisp_factor_table),
OWL_FACTOR_HW(CMU_VDECLK, 0, 3, 0, hde_factor_table),
0);
static OWL_COMP_FACTOR(bisp_clk, "bisp_clk", bisp_clk_mux_p,
static OWL_COMP_DIV(bisp_clk, "bisp_clk", bisp_clk_mux_p,
OWL_MUX_HW(CMU_BISPCLK, 4, 1),
OWL_GATE_HW(CMU_DEVCLKEN0, 14, 0),
OWL_FACTOR_HW(CMU_BISPCLK, 0, 3, 0, bisp_factor_table),
OWL_DIVIDER_HW(CMU_BISPCLK, 0, 4, 0, std12rate_div_table),
0);
static OWL_COMP_FACTOR(sensor0_clk, "sensor0_clk", sensor_clk_mux_p,
static OWL_COMP_DIV(sensor0_clk, "sensor0_clk", sensor_clk_mux_p,
OWL_MUX_HW(CMU_SENSORCLK, 4, 1),
OWL_GATE_HW(CMU_DEVCLKEN0, 14, 0),
OWL_FACTOR_HW(CMU_SENSORCLK, 0, 3, 0, bisp_factor_table),
CLK_IGNORE_UNUSED);
OWL_DIVIDER_HW(CMU_SENSORCLK, 0, 4, 0, std12rate_div_table),
0);
static OWL_COMP_FACTOR(sensor1_clk, "sensor1_clk", sensor_clk_mux_p,
static OWL_COMP_DIV(sensor1_clk, "sensor1_clk", sensor_clk_mux_p,
OWL_MUX_HW(CMU_SENSORCLK, 4, 1),
OWL_GATE_HW(CMU_DEVCLKEN0, 14, 0),
OWL_FACTOR_HW(CMU_SENSORCLK, 8, 3, 0, bisp_factor_table),
CLK_IGNORE_UNUSED);
OWL_DIVIDER_HW(CMU_SENSORCLK, 8, 4, 0, std12rate_div_table),
0);
static OWL_COMP_FACTOR(sd0_clk, "sd0_clk", sd_clk_mux_p,
OWL_MUX_HW(CMU_SD0CLK, 9, 1),