On 1/28/25 10:17, Philipp Zabel wrote:
> On Di, 2025-01-28 at 09:17 +0100, patrice.chotard@xxxxxxxxxxx wrote:
>> From: Patrice Chotard <patrice.chotard@xxxxxxxxxxx>
>>
>> Octo Memory Manager driver (OMM) manages:
>> - the muxing between 2 OSPI busses and 2 output ports.
>> There are 4 possible muxing configurations:
>> - direct mode (no multiplexing): OSPI1 output is on port 1 and OSPI2
>> output is on port 2
>> - OSPI1 and OSPI2 are multiplexed over the same output port 1
>> - swapped mode (no multiplexing), OSPI1 output is on port 2,
>> OSPI2 output is on port 1
>> - OSPI1 and OSPI2 are multiplexed over the same output port 2
>> - the split of the memory area shared between the 2 OSPI instances.
>> - chip select selection override.
>> - the time between 2 transactions in multiplexed mode.
>> - check firewall access.
>>
>> Signed-off-by: Patrice Chotard <patrice.chotard@xxxxxxxxxxx>
>> Signed-off-by: Christophe Kerello <christophe.kerello@xxxxxxxxxxx>
>> ---
>> drivers/memory/Kconfig | 17 ++
>> drivers/memory/Makefile | 1 +
>> drivers/memory/stm32_omm.c | 509 +++++++++++++++++++++++++++++++++++++
>> 3 files changed, 527 insertions(+)
>> create mode 100644 drivers/memory/stm32_omm.c
>>
> [...]
>> diff --git a/drivers/memory/stm32_omm.c b/drivers/memory/stm32_omm.c
>> new file mode 100644
>> index 000000000000..6f20fe0183ec
>> --- /dev/null
>> +++ b/drivers/memory/stm32_omm.c
>> @@ -0,0 +1,509 @@
> [...]
>> +static int stm32_omm_configure(struct device *dev)
>> +{
>> + struct stm32_omm *omm = dev_get_drvdata(dev);
>> + struct reset_control *rstc;
>> + unsigned long clk_rate, clk_rate_max = 0;
>> + int ret;
>> + u8 i;
>> + u32 mux = 0;
>> + u32 cssel_ovr = 0;
>> + u32 req2ack = 0;
>> +
>> + omm->clk = devm_clk_get(dev, NULL);
>> + if (IS_ERR(omm->clk)) {
>> + dev_err(dev, "Failed to get OMM clock (%ld)\n",
>> + PTR_ERR(omm->clk));
>> +
>> + return PTR_ERR(omm->clk);
>> + }
>> +
>> + ret = pm_runtime_resume_and_get(dev);
>> + if (ret < 0)
>> + return ret;
>> +
>> + /* parse children's clock */
>> + for (i = 0; i < omm->nb_child; i++) {
>> + clk_rate = clk_get_rate(omm->child[i].clk);
>> + if (!clk_rate) {
>> + dev_err(dev, "Invalid clock rate\n");
>> + goto err_clk_disable;
>> + }
>> +
>> + if (clk_rate > clk_rate_max)
>> + clk_rate_max = clk_rate;
>> + }
>> +
>> + rstc = devm_reset_control_get_optional(dev, NULL);
>
> Please use devm_reset_control_get_optional_exclusive() directly.
ok
Thanks
Patrice
>
> regards
> Philipp
