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Date: Tue, 1 Mar 2016 18:07:27 +0000 (UTC)
From: Paul Walmsley <paul@...an.com>
To: Franklin S Cooper Jr <fcooper@...com>
cc: t-kristo@...com, tony@...mide.com, vigneshr@...com,
linux-pwm@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org
Subject: Re: [PATCH v3 2/5] ARM: OMAP2+: DRA7: Add hwmod entries for PWMSS
Hi guys
On Thu, 25 Feb 2016, Franklin S Cooper Jr wrote:
> From: Vignesh R <vigneshr@...com>
>
> Add hwmod entries for the PWMSS on DRA7.
>
> Set l4_root_clk_div as the main_clk of PWMSS. It is fixed-factored clock
> equal to L4PER2_L3_GICLK/2(l3_iclk_div/2).
> As per AM57x TRM SPRUHZ6[1], October 2014, Section 29.1.3 Table 29-4,
> clock source to PWMSS is L4PER2_L3_GICLK. But it is actually
> L4PER2_L3_GICLK/2. The TRM does not show the division by 2.
>
> [1] www.ti.com/lit/ug/spruhz6/spruhz6.pdf
>
> Signed-off-by: Vignesh R <vigneshr@...com>
So I still don't understand one thing about this patch, and I apologize if
this has been covered already and I've just forgotten it. Why are EQEP,
ECAP, EHRPWM listed as hwmods? It looks, based on this data, that they
don't have any of the Highlander integration. Shouldn't these just be
listed in a DT 'simple-bus' type of arrangement under epwmss0, epwmss1?
Or am I missing something?
- Paul
> ---
> Version 3 changes:
> Switch from SYSC_HAS_RESET_STATUS to SYSC_HAS_SOFTRESET which is the
> correct bitfield for that register.
>
> arch/arm/mach-omap2/omap_hwmod_7xx_data.c | 239 ++++++++++++++++++++++++++++++
> 1 file changed, 239 insertions(+)
>
> diff --git a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
> index 848356e..4b2d68b 100644
> --- a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
> +++ b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
> @@ -383,6 +383,149 @@ static struct omap_hwmod dra7xx_dcan2_hwmod = {
> },
> };
>
> +/* pwmss */
> +static struct omap_hwmod_class_sysconfig dra7xx_epwmss_sysc = {
> + .rev_offs = 0x0,
> + .sysc_offs = 0x4,
> + .sysc_flags = SYSC_HAS_SIDLEMODE | SYSC_HAS_SOFTRESET,
> + .idlemodes = (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART),
> + .sysc_fields = &omap_hwmod_sysc_type2,
> +};
> +
> +struct omap_hwmod_class dra7xx_epwmss_hwmod_class = {
> + .name = "epwmss",
> + .sysc = &dra7xx_epwmss_sysc,
> +};
> +
> +static struct omap_hwmod_class dra7xx_ecap_hwmod_class = {
> + .name = "ecap",
> +};
> +
> +static struct omap_hwmod_class dra7xx_eqep_hwmod_class = {
> + .name = "eqep",
> +};
> +
> +struct omap_hwmod_class dra7xx_ehrpwm_hwmod_class = {
> + .name = "ehrpwm",
> +};
> +
> +/* epwmss0 */
> +struct omap_hwmod dra7xx_epwmss0_hwmod = {
> + .name = "epwmss0",
> + .class = &dra7xx_epwmss_hwmod_class,
> + .clkdm_name = "l4per2_clkdm",
> + .main_clk = "l4_root_clk_div",
> + .prcm = {
> + .omap4 = {
> + .modulemode = MODULEMODE_SWCTRL,
> + .clkctrl_offs = DRA7XX_CM_L4PER2_PWMSS1_CLKCTRL_OFFSET,
> + .context_offs = DRA7XX_RM_L4PER2_PWMSS1_CONTEXT_OFFSET,
> + },
> + },
> +};
> +
> +/* ecap0 */
> +struct omap_hwmod dra7xx_ecap0_hwmod = {
> + .name = "ecap0",
> + .class = &dra7xx_ecap_hwmod_class,
> + .clkdm_name = "l4per2_clkdm",
> + .main_clk = "l4_root_clk_div",
> +};
> +
> +/* eqep0 */
> +struct omap_hwmod dra7xx_eqep0_hwmod = {
> + .name = "eqep0",
> + .class = &dra7xx_eqep_hwmod_class,
> + .clkdm_name = "l4per2_clkdm",
> + .main_clk = "l4_root_clk_div",
> +};
> +
> +/* ehrpwm0 */
> +struct omap_hwmod dra7xx_ehrpwm0_hwmod = {
> + .name = "ehrpwm0",
> + .class = &dra7xx_ehrpwm_hwmod_class,
> + .clkdm_name = "l4per2_clkdm",
> + .main_clk = "l4_root_clk_div",
> +};
> +
> +/* epwmss1 */
> +struct omap_hwmod dra7xx_epwmss1_hwmod = {
> + .name = "epwmss1",
> + .class = &dra7xx_epwmss_hwmod_class,
> + .clkdm_name = "l4per2_clkdm",
> + .main_clk = "l4_root_clk_div",
> + .prcm = {
> + .omap4 = {
> + .modulemode = MODULEMODE_SWCTRL,
> + .clkctrl_offs = DRA7XX_CM_L4PER2_PWMSS2_CLKCTRL_OFFSET,
> + .context_offs = DRA7XX_RM_L4PER2_PWMSS2_CONTEXT_OFFSET,
> + },
> + },
> +};
> +
> +/* ecap1 */
> +struct omap_hwmod dra7xx_ecap1_hwmod = {
> + .name = "ecap1",
> + .class = &dra7xx_ecap_hwmod_class,
> + .clkdm_name = "l4per2_clkdm",
> + .main_clk = "l4_root_clk_div",
> +};
> +
> +/* eqep1 */
> +struct omap_hwmod dra7xx_eqep1_hwmod = {
> + .name = "eqep1",
> + .class = &dra7xx_eqep_hwmod_class,
> + .clkdm_name = "l4per2_clkdm",
> + .main_clk = "l4_root_clk_div",
> +};
> +
> +/* ehrpwm1 */
> +struct omap_hwmod dra7xx_ehrpwm1_hwmod = {
> + .name = "ehrpwm1",
> + .class = &dra7xx_ehrpwm_hwmod_class,
> + .clkdm_name = "l4per2_clkdm",
> + .main_clk = "l4_root_clk_div",
> +};
> +
> +/* epwmss2 */
> +struct omap_hwmod dra7xx_epwmss2_hwmod = {
> + .name = "epwmss2",
> + .class = &dra7xx_epwmss_hwmod_class,
> + .clkdm_name = "l4per2_clkdm",
> + .main_clk = "l4_root_clk_div",
> + .prcm = {
> + .omap4 = {
> + .modulemode = MODULEMODE_SWCTRL,
> + .clkctrl_offs = DRA7XX_CM_L4PER2_PWMSS3_CLKCTRL_OFFSET,
> + .context_offs = DRA7XX_RM_L4PER2_PWMSS3_CONTEXT_OFFSET,
> + },
> + },
> +};
> +
> +/* ecap2 */
> +struct omap_hwmod dra7xx_ecap2_hwmod = {
> + .name = "ecap2",
> + .class = &dra7xx_ecap_hwmod_class,
> + .clkdm_name = "l4per2_clkdm",
> + .main_clk = "l4_root_clk_div",
> +};
> +
> +/* eqep2 */
> +struct omap_hwmod dra7xx_eqep2_hwmod = {
> + .name = "eqep2",
> + .class = &dra7xx_eqep_hwmod_class,
> + .clkdm_name = "l4per2_clkdm",
> + .main_clk = "l4_root_clk_div",
> +};
> +
> +/* ehrpwm2 */
> +struct omap_hwmod dra7xx_ehrpwm2_hwmod = {
> + .name = "ehrpwm2",
> + .class = &dra7xx_ehrpwm_hwmod_class,
> + .clkdm_name = "l4per2_clkdm",
> + .main_clk = "l4_root_clk_div",
> +};
> +
> /*
> * 'dma' class
> *
> @@ -2676,6 +2819,90 @@ static struct omap_hwmod_ocp_if dra7xx_l4_per1__gpio6 = {
> .user = OCP_USER_MPU | OCP_USER_SDMA,
> };
>
> +struct omap_hwmod_ocp_if dra7xx_l4_per2__epwmss0 = {
> + .master = &dra7xx_l4_per2_hwmod,
> + .slave = &dra7xx_epwmss0_hwmod,
> + .clk = "l4_root_clk_div",
> + .user = OCP_USER_MPU,
> +};
> +
> +struct omap_hwmod_ocp_if dra7xx_epwmss0__ecap0 = {
> + .master = &dra7xx_epwmss0_hwmod,
> + .slave = &dra7xx_ecap0_hwmod,
> + .clk = "l4_root_clk_div",
> + .user = OCP_USER_MPU,
> +};
> +
> +struct omap_hwmod_ocp_if dra7xx_epwmss0__eqep0 = {
> + .master = &dra7xx_epwmss0_hwmod,
> + .slave = &dra7xx_eqep0_hwmod,
> + .clk = "l4_root_clk_div",
> + .user = OCP_USER_MPU,
> +};
> +
> +struct omap_hwmod_ocp_if dra7xx_epwmss0__ehrpwm0 = {
> + .master = &dra7xx_epwmss0_hwmod,
> + .slave = &dra7xx_ehrpwm0_hwmod,
> + .clk = "l4_root_clk_div",
> + .user = OCP_USER_MPU,
> +};
> +
> +struct omap_hwmod_ocp_if dra7xx_l4_per2__epwmss1 = {
> + .master = &dra7xx_l4_per2_hwmod,
> + .slave = &dra7xx_epwmss1_hwmod,
> + .clk = "l4_root_clk_div",
> + .user = OCP_USER_MPU,
> +};
> +
> +struct omap_hwmod_ocp_if dra7xx_epwmss1__ecap1 = {
> + .master = &dra7xx_epwmss1_hwmod,
> + .slave = &dra7xx_ecap1_hwmod,
> + .clk = "l4_root_clk_div",
> + .user = OCP_USER_MPU,
> +};
> +
> +struct omap_hwmod_ocp_if dra7xx_epwmss1__eqep1 = {
> + .master = &dra7xx_epwmss1_hwmod,
> + .slave = &dra7xx_eqep1_hwmod,
> + .clk = "l4_root_clk_div",
> + .user = OCP_USER_MPU,
> +};
> +
> +struct omap_hwmod_ocp_if dra7xx_epwmss1__ehrpwm1 = {
> + .master = &dra7xx_epwmss1_hwmod,
> + .slave = &dra7xx_ehrpwm1_hwmod,
> + .clk = "l4_root_clk_div",
> + .user = OCP_USER_MPU,
> +};
> +
> +struct omap_hwmod_ocp_if dra7xx_l4_per2__epwmss2 = {
> + .master = &dra7xx_l4_per2_hwmod,
> + .slave = &dra7xx_epwmss2_hwmod,
> + .clk = "l4_root_clk_div",
> + .user = OCP_USER_MPU,
> +};
> +
> +struct omap_hwmod_ocp_if dra7xx_epwmss2__ecap2 = {
> + .master = &dra7xx_epwmss2_hwmod,
> + .slave = &dra7xx_ecap2_hwmod,
> + .clk = "l4_root_clk_div",
> + .user = OCP_USER_MPU,
> +};
> +
> +struct omap_hwmod_ocp_if dra7xx_epwmss2__eqep2 = {
> + .master = &dra7xx_epwmss2_hwmod,
> + .slave = &dra7xx_eqep2_hwmod,
> + .clk = "l4_root_clk_div",
> + .user = OCP_USER_MPU,
> +};
> +
> +struct omap_hwmod_ocp_if dra7xx_epwmss2__ehrpwm2 = {
> + .master = &dra7xx_epwmss2_hwmod,
> + .slave = &dra7xx_ehrpwm2_hwmod,
> + .clk = "l4_root_clk_div",
> + .user = OCP_USER_MPU,
> +};
> +
> /* l4_per1 -> gpio7 */
> static struct omap_hwmod_ocp_if dra7xx_l4_per1__gpio7 = {
> .master = &dra7xx_l4_per1_hwmod,
> @@ -3452,6 +3679,18 @@ static struct omap_hwmod_ocp_if *dra7xx_hwmod_ocp_ifs[] __initdata = {
> &dra7xx_l3_main_1__vcp2,
> &dra7xx_l4_per2__vcp2,
> &dra7xx_l4_wkup__wd_timer2,
> + &dra7xx_l4_per2__epwmss0,
> + &dra7xx_epwmss0__ecap0,
> + &dra7xx_epwmss0__eqep0,
> + &dra7xx_epwmss0__ehrpwm0,
> + &dra7xx_l4_per2__epwmss1,
> + &dra7xx_epwmss1__ecap1,
> + &dra7xx_epwmss1__eqep1,
> + &dra7xx_epwmss1__ehrpwm1,
> + &dra7xx_l4_per2__epwmss2,
> + &dra7xx_epwmss2__ecap2,
> + &dra7xx_epwmss2__eqep2,
> + &dra7xx_epwmss2__ehrpwm2,
> NULL,
> };
>
> --
> 2.7.0
>
- Paul
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