Re: [PATCH v2 3/4] clk: mediatek: Add subsystem clocks of MT8173

From: Daniel Kurtz
Date: Wed Jul 01 2015 - 10:55:00 EST

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On Tue, Jun 30, 2015 at 10:58 AM, James Liao <jamesjj.liao@xxxxxxxxxxxx> wrote:
> Most multimedia subsystem clocks will be accessed by multiple
> drivers, so it's a better way to manage these clocks in CCF.
> This patch adds clock support for MM, IMG, VDEC, VENC and VENC_LT
> subsystems.
>
> Signed-off-by: James Liao <jamesjj.liao@xxxxxxxxxxxx>
> ---
> drivers/clk/mediatek/clk-mt8173.c | 298 +++++++++++++++++++++++++++++++++
> include/dt-bindings/clock/mt8173-clk.h | 91 +++++++++-
> 2 files changed, 387 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/clk/mediatek/clk-mt8173.c b/drivers/clk/mediatek/clk-mt8173.c
> index c483336..75be757 100644
> --- a/drivers/clk/mediatek/clk-mt8173.c
> +++ b/drivers/clk/mediatek/clk-mt8173.c
> @@ -700,6 +700,183 @@ static const struct mtk_composite peri_clks[] __initconst = {
> MUX(CLK_PERI_UART3_SEL, "uart3_ck_sel", uart_ck_sel_parents, 0x40c, 3, 1),
> };
>
> +static struct mtk_gate_regs cg_regs_4_8_0 = {

These should all be:

static const struct mtk_gate_regs ...

> + .set_ofs = 0x0004,
> + .clr_ofs = 0x0008,
> + .sta_ofs = 0x0000,
> +};
> +
> +#define GATE_IMG(_id, _name, _parent, _shift) { \
> + .id = _id, \
> + .name = _name, \
> + .parent_name = _parent, \
> + .regs = &cg_regs_4_8_0, \
> + .shift = _shift, \
> + .ops = &mtk_clk_gate_ops_setclr, \
> + }
> +
> +static struct mtk_gate img_clks[] __initdata = {

These should all be:

static const ... __initconst = {

> + GATE_IMG(CLK_IMG_LARB2_SMI, "img_larb2_smi", "mm_sel", 0),
> + GATE_IMG(CLK_IMG_CAM_SMI, "img_cam_smi", "mm_sel", 5),
> + GATE_IMG(CLK_IMG_CAM_CAM, "img_cam_cam", "mm_sel", 6),
> + GATE_IMG(CLK_IMG_SEN_TG, "img_sen_tg", "camtg_sel", 7),
> + GATE_IMG(CLK_IMG_SEN_CAM, "img_sen_cam", "mm_sel", 8),
> + GATE_IMG(CLK_IMG_CAM_SV, "img_cam_sv", "mm_sel", 9),
> + GATE_IMG(CLK_IMG_FD, "img_fd", "mm_sel", 11),
> +};
> +
> +static struct mtk_gate_regs mm0_cg_regs = {
> + .set_ofs = 0x0104,
> + .clr_ofs = 0x0108,
> + .sta_ofs = 0x0100,
> +};
> +
> +static struct mtk_gate_regs mm1_cg_regs = {
> + .set_ofs = 0x0114,
> + .clr_ofs = 0x0118,
> + .sta_ofs = 0x0110,
> +};
> +
> +#define GATE_MM0(_id, _name, _parent, _shift) { \
> + .id = _id, \
> + .name = _name, \
> + .parent_name = _parent, \
> + .regs = &mm0_cg_regs, \
> + .shift = _shift, \
> + .ops = &mtk_clk_gate_ops_setclr, \
> + }
> +
> +#define GATE_MM1(_id, _name, _parent, _shift) { \
> + .id = _id, \
> + .name = _name, \
> + .parent_name = _parent, \
> + .regs = &mm1_cg_regs, \
> + .shift = _shift, \
> + .ops = &mtk_clk_gate_ops_setclr, \
> + }
> +
> +static struct mtk_gate mm_clks[] __initdata = {
> + /* MM0 */
> + GATE_MM0(CLK_MM_SMI_COMMON, "mm_smi_common", "mm_sel", 0),
> + GATE_MM0(CLK_MM_SMI_LARB0, "mm_smi_larb0", "mm_sel", 1),
> + GATE_MM0(CLK_MM_CAM_MDP, "mm_cam_mdp", "mm_sel", 2),
> + GATE_MM0(CLK_MM_MDP_RDMA0, "mm_mdp_rdma0", "mm_sel", 3),
> + GATE_MM0(CLK_MM_MDP_RDMA1, "mm_mdp_rdma1", "mm_sel", 4),
> + GATE_MM0(CLK_MM_MDP_RSZ0, "mm_mdp_rsz0", "mm_sel", 5),
> + GATE_MM0(CLK_MM_MDP_RSZ1, "mm_mdp_rsz1", "mm_sel", 6),
> + GATE_MM0(CLK_MM_MDP_RSZ2, "mm_mdp_rsz2", "mm_sel", 7),
> + GATE_MM0(CLK_MM_MDP_TDSHP0, "mm_mdp_tdshp0", "mm_sel", 8),
> + GATE_MM0(CLK_MM_MDP_TDSHP1, "mm_mdp_tdshp1", "mm_sel", 9),
> + GATE_MM0(CLK_MM_MDP_WDMA, "mm_mdp_wdma", "mm_sel", 11),
> + GATE_MM0(CLK_MM_MDP_WROT0, "mm_mdp_wrot0", "mm_sel", 12),
> + GATE_MM0(CLK_MM_MDP_WROT1, "mm_mdp_wrot1", "mm_sel", 13),
> + GATE_MM0(CLK_MM_FAKE_ENG, "mm_fake_eng", "mm_sel", 14),
> + GATE_MM0(CLK_MM_MUTEX_32K, "mm_mutex_32k", "rtc_sel", 15),
> + GATE_MM0(CLK_MM_DISP_OVL0, "mm_disp_ovl0", "mm_sel", 16),
> + GATE_MM0(CLK_MM_DISP_OVL1, "mm_disp_ovl1", "mm_sel", 17),
> + GATE_MM0(CLK_MM_DISP_RDMA0, "mm_disp_rdma0", "mm_sel", 18),
> + GATE_MM0(CLK_MM_DISP_RDMA1, "mm_disp_rdma1", "mm_sel", 19),
> + GATE_MM0(CLK_MM_DISP_RDMA2, "mm_disp_rdma2", "mm_sel", 20),
> + GATE_MM0(CLK_MM_DISP_WDMA0, "mm_disp_wdma0", "mm_sel", 21),
> + GATE_MM0(CLK_MM_DISP_WDMA1, "mm_disp_wdma1", "mm_sel", 22),
> + GATE_MM0(CLK_MM_DISP_COLOR0, "mm_disp_color0", "mm_sel", 23),
> + GATE_MM0(CLK_MM_DISP_COLOR1, "mm_disp_color1", "mm_sel", 24),
> + GATE_MM0(CLK_MM_DISP_AAL, "mm_disp_aal", "mm_sel", 25),
> + GATE_MM0(CLK_MM_DISP_GAMMA, "mm_disp_gamma", "mm_sel", 26),
> + GATE_MM0(CLK_MM_DISP_UFOE, "mm_disp_ufoe", "mm_sel", 27),
> + GATE_MM0(CLK_MM_DISP_SPLIT0, "mm_disp_split0", "mm_sel", 28),
> + GATE_MM0(CLK_MM_DISP_SPLIT1, "mm_disp_split1", "mm_sel", 29),
> + GATE_MM0(CLK_MM_DISP_MERGE, "mm_disp_merge", "mm_sel", 30),
> + GATE_MM0(CLK_MM_DISP_OD, "mm_disp_od", "mm_sel", 31),
> + /* MM1 */
> + GATE_MM1(CLK_MM_DISP_PWM0MM, "mm_disp_pwm0mm", "mm_sel", 0),
> + GATE_MM1(CLK_MM_DISP_PWM026M, "mm_disp_pwm026m", "pwm_sel", 1),
> + GATE_MM1(CLK_MM_DISP_PWM1MM, "mm_disp_pwm1mm", "mm_sel", 2),
> + GATE_MM1(CLK_MM_DISP_PWM126M, "mm_disp_pwm126m", "pwm_sel", 3),
> + GATE_MM1(CLK_MM_DSI0_ENGINE, "mm_dsi0_engine", "mm_sel", 4),
> + GATE_MM1(CLK_MM_DSI0_DIGITAL, "mm_dsi0_digital", "clk_null", 5),
> + GATE_MM1(CLK_MM_DSI1_ENGINE, "mm_dsi1_engine", "mm_sel", 6),
> + GATE_MM1(CLK_MM_DSI1_DIGITAL, "mm_dsi1_digital", "clk_null", 7),
> + GATE_MM1(CLK_MM_DPI_PIXEL, "mm_dpi_pixel", "dpi0_sel", 8),
> + GATE_MM1(CLK_MM_DPI_ENGINE, "mm_dpi_engine", "mm_sel", 9),
> + GATE_MM1(CLK_MM_DPI1_PIXEL, "mm_dpi1_pixel", "clk_null", 10),
> + GATE_MM1(CLK_MM_DPI1_ENGINE, "mm_dpi1_engine", "mm_sel", 11),
> + GATE_MM1(CLK_MM_HDMI_PIXEL, "mm_hdmi_pixel", "dpi0_sel", 12),
> + GATE_MM1(CLK_MM_HDMI_PLLCK, "mm_hdmi_pllck", "hdmi_sel", 13),
> + GATE_MM1(CLK_MM_HDMI_AUDIO, "mm_hdmi_audio", "apll1", 14),
> + GATE_MM1(CLK_MM_HDMI_SPDIF, "mm_hdmi_spdif", "apll2", 15),
> + GATE_MM1(CLK_MM_LVDS_PIXEL, "mm_lvds_pixel", "clk_null", 16),
> + GATE_MM1(CLK_MM_LVDS_CTS, "mm_lvds_cts", "clk_null", 17),
> + GATE_MM1(CLK_MM_SMI_LARB4, "mm_smi_larb4", "mm_sel", 18),
> + GATE_MM1(CLK_MM_HDMI_HDCP, "mm_hdmi_hdcp", "hdcp_sel", 19),
> + GATE_MM1(CLK_MM_HDMI_HDCP24M, "mm_hdmi_hdcp24m", "hdcp_24m_sel", 20),
> +};
> +
> +static struct mtk_gate_regs vdec0_cg_regs = {
> + .set_ofs = 0x0000,
> + .clr_ofs = 0x0004,
> + .sta_ofs = 0x0000,
> +};
> +
> +static struct mtk_gate_regs vdec1_cg_regs = {
> + .set_ofs = 0x0008,
> + .clr_ofs = 0x000c,
> + .sta_ofs = 0x0008,
> +};
> +
> +#define GATE_VDEC0(_id, _name, _parent, _shift) { \
> + .id = _id, \
> + .name = _name, \
> + .parent_name = _parent, \
> + .regs = &vdec0_cg_regs, \
> + .shift = _shift, \
> + .ops = &mtk_clk_gate_ops_setclr_inv, \
> + }
> +
> +#define GATE_VDEC1(_id, _name, _parent, _shift) { \
> + .id = _id, \
> + .name = _name, \
> + .parent_name = _parent, \
> + .regs = &vdec1_cg_regs, \
> + .shift = _shift, \
> + .ops = &mtk_clk_gate_ops_setclr_inv, \
> + }
> +
> +static struct mtk_gate vdec_clks[] __initdata = {
> + GATE_VDEC0(CLK_VDEC_CKEN, "vdec_cken", "vdec_sel", 0),
> + GATE_VDEC1(CLK_VDEC_LARB_CKEN, "vdec_larb_cken", "mm_sel", 0),
> +};
> +
> +#define GATE_VENC(_id, _name, _parent, _shift) { \
> + .id = _id, \
> + .name = _name, \
> + .parent_name = _parent, \
> + .regs = &cg_regs_4_8_0, \
> + .shift = _shift, \
> + .ops = &mtk_clk_gate_ops_setclr_inv, \
> + }
> +
> +static struct mtk_gate venc_clks[] __initdata = {
> + GATE_VENC(CLK_VENC_CKE0, "venc_cke0", "mm_sel", 0),
> + GATE_VENC(CLK_VENC_CKE1, "venc_cke1", "venc_sel", 4),
> + GATE_VENC(CLK_VENC_CKE2, "venc_cke2", "venc_sel", 8),
> + GATE_VENC(CLK_VENC_CKE3, "venc_cke3", "venc_sel", 12),
> +};
> +
> +#define GATE_VENCLT(_id, _name, _parent, _shift) { \
> + .id = _id, \
> + .name = _name, \
> + .parent_name = _parent, \
> + .regs = &cg_regs_4_8_0, \
> + .shift = _shift, \
> + .ops = &mtk_clk_gate_ops_setclr_inv, \
> + }
> +
> +static struct mtk_gate venclt_clks[] __initdata = {
> + GATE_VENCLT(CLK_VENCLT_CKE0, "venclt_cke0", "mm_sel", 0),
> + GATE_VENCLT(CLK_VENCLT_CKE1, "venclt_cke1", "venclt_sel", 4),
> +};
> +
> static struct clk_onecell_data *mt8173_top_clk_data;
> static struct clk_onecell_data *mt8173_pll_clk_data;
>
> @@ -844,3 +1021,124 @@ static void __init mtk_apmixedsys_init(struct device_node *node)
> }
> CLK_OF_DECLARE(mtk_apmixedsys, "mediatek,mt8173-apmixedsys",
> mtk_apmixedsys_init);
> +
> +static void __init mtk_imgsys_init(struct device_node *node)
> +{
> + struct clk_onecell_data *clk_data;
> + void __iomem *base;

I don't think you need base for any of these.
mtk_clk_register_gates() will use syscon_node_to_regmap() to lookup
the regmap by itself.

> + int r;
> +
> + base = of_iomap(node, 0);
> + if (!base) {
> + pr_err("%s(): ioremap failed\n", __func__);
> + return;
> + }
> +
> + clk_data = mtk_alloc_clk_data(CLK_IMG_NR_CLK);

Unrelated to this patch, but:
I think each clock node should statically declare its
clk_onecell_data, and pass it to mtk_alloc_clk_data().
mtk_alloc_clk_data() should then just allocate and initialize the clks array.

> +
> + mtk_clk_register_gates(node, img_clks, ARRAY_SIZE(img_clks),
> + clk_data);
> +
> + r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
> +
> + if (r)
> + pr_err("%s(): could not register clock provider: %d\n",
> + __func__, r);
> +}
> +CLK_OF_DECLARE(mtk_imgsys, "mediatek,mt8173-imgsys", mtk_imgsys_init);
> +
> +static void __init mtk_mmsys_init(struct device_node *node)
> +{
> + struct clk_onecell_data *clk_data;
> + void __iomem *base;
> + int r;
> +
> + base = of_iomap(node, 0);
> + if (!base) {
> + pr_err("%s(): ioremap failed\n", __func__);
> + return;
> + }
> +
> + clk_data = mtk_alloc_clk_data(CLK_MM_NR_CLK);
> +
> + mtk_clk_register_gates(node, mm_clks, ARRAY_SIZE(mm_clks),
> + clk_data);
> +
> + r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
> + if (r)
> + pr_err("%s(): could not register clock provider: %d\n",
> + __func__, r);
> +}
> +CLK_OF_DECLARE(mtk_mmsys, "mediatek,mt8173-mmsys", mtk_mmsys_init);
> +
> +static void __init mtk_vdecsys_init(struct device_node *node)
> +{
> + struct clk_onecell_data *clk_data;
> + void __iomem *base;
> + int r;
> +
> + base = of_iomap(node, 0);
> + if (!base) {
> + pr_err("%s(): ioremap failed\n", __func__);
> + return;
> + }
> +
> + clk_data = mtk_alloc_clk_data(CLK_VDEC_NR_CLK);
> +
> + mtk_clk_register_gates(node, vdec_clks, ARRAY_SIZE(vdec_clks),
> + clk_data);
> +
> + r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
> + if (r)
> + pr_err("%s(): could not register clock provider: %d\n",
> + __func__, r);
> +}
> +CLK_OF_DECLARE(mtk_vdecsys, "mediatek,mt8173-vdecsys", mtk_vdecsys_init);
> +
> +static void __init mtk_vencsys_init(struct device_node *node)
> +{
> + struct clk_onecell_data *clk_data;
> + void __iomem *base;
> + int r;
> +
> + base = of_iomap(node, 0);
> + if (!base) {
> + pr_err("%s(): ioremap failed\n", __func__);
> + return;
> + }
> +
> + clk_data = mtk_alloc_clk_data(CLK_VENC_NR_CLK);
> +
> + mtk_clk_register_gates(node, venc_clks, ARRAY_SIZE(venc_clks),
> + clk_data);
> +
> + r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
> + if (r)
> + pr_err("%s(): could not register clock provider: %d\n",
> + __func__, r);
> +}
> +CLK_OF_DECLARE(mtk_vencsys, "mediatek,mt8173-vencsys", mtk_vencsys_init);
> +
> +static void __init mtk_vencltsys_init(struct device_node *node)
> +{
> + struct clk_onecell_data *clk_data;
> + void __iomem *base;
> + int r;
> +
> + base = of_iomap(node, 0);
> + if (!base) {
> + pr_err("%s(): ioremap failed\n", __func__);
> + return;
> + }
> +
> + clk_data = mtk_alloc_clk_data(CLK_VENCLT_NR_CLK);
> +
> + mtk_clk_register_gates(node, venclt_clks, ARRAY_SIZE(venclt_clks),
> + clk_data);
> +
> + r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
> + if (r)
> + pr_err("%s(): could not register clock provider: %d\n",
> + __func__, r);
> +}
> +CLK_OF_DECLARE(mtk_vencltsys, "mediatek,mt8173-vencltsys", mtk_vencltsys_init);
> diff --git a/include/dt-bindings/clock/mt8173-clk.h b/include/dt-bindings/clock/mt8173-clk.h
> index 4ad76ed..6ce88bf 100644
> --- a/include/dt-bindings/clock/mt8173-clk.h
> +++ b/include/dt-bindings/clock/mt8173-clk.h
> @@ -158,8 +158,8 @@
>
> /* APMIXED_SYS */
>
> -#define CLK_APMIXED_ARMCA15PLL 1
> -#define CLK_APMIXED_ARMCA7PLL 2
> +#define CLK_APMIXED_ARMCA15PLL 1
> +#define CLK_APMIXED_ARMCA7PLL 2
> #define CLK_APMIXED_MAINPLL 3
> #define CLK_APMIXED_UNIVPLL 4
> #define CLK_APMIXED_MMPLL 5
> @@ -232,4 +232,91 @@
> #define CLK_PERI_UART3_SEL 39
> #define CLK_PERI_NR_CLK 40

Why do we count up from 1 instead of 0?
This means that for each clock-controller:
clk_onecell_data->clk[0] == ERR_PTR(-ENOENT)

Thanks!
-Dan

>
> +/* IMG_SYS */
> +
> +#define CLK_IMG_LARB2_SMI 1
> +#define CLK_IMG_CAM_SMI 2
> +#define CLK_IMG_CAM_CAM 3
> +#define CLK_IMG_SEN_TG 4
> +#define CLK_IMG_SEN_CAM 5
> +#define CLK_IMG_CAM_SV 6
> +#define CLK_IMG_FD 7
> +#define CLK_IMG_NR_CLK 8
> +
> +/* MM_SYS */
> +
> +#define CLK_MM_SMI_COMMON 1
> +#define CLK_MM_SMI_LARB0 2
> +#define CLK_MM_CAM_MDP 3
> +#define CLK_MM_MDP_RDMA0 4
> +#define CLK_MM_MDP_RDMA1 5
> +#define CLK_MM_MDP_RSZ0 6
> +#define CLK_MM_MDP_RSZ1 7
> +#define CLK_MM_MDP_RSZ2 8
> +#define CLK_MM_MDP_TDSHP0 9
> +#define CLK_MM_MDP_TDSHP1 10
> +#define CLK_MM_MDP_WDMA 11
> +#define CLK_MM_MDP_WROT0 12
> +#define CLK_MM_MDP_WROT1 13
> +#define CLK_MM_FAKE_ENG 14
> +#define CLK_MM_MUTEX_32K 15
> +#define CLK_MM_DISP_OVL0 16
> +#define CLK_MM_DISP_OVL1 17
> +#define CLK_MM_DISP_RDMA0 18
> +#define CLK_MM_DISP_RDMA1 19
> +#define CLK_MM_DISP_RDMA2 20
> +#define CLK_MM_DISP_WDMA0 21
> +#define CLK_MM_DISP_WDMA1 22
> +#define CLK_MM_DISP_COLOR0 23
> +#define CLK_MM_DISP_COLOR1 24
> +#define CLK_MM_DISP_AAL 25
> +#define CLK_MM_DISP_GAMMA 26
> +#define CLK_MM_DISP_UFOE 27
> +#define CLK_MM_DISP_SPLIT0 28
> +#define CLK_MM_DISP_SPLIT1 29
> +#define CLK_MM_DISP_MERGE 30
> +#define CLK_MM_DISP_OD 31
> +#define CLK_MM_DISP_PWM0MM 32
> +#define CLK_MM_DISP_PWM026M 33
> +#define CLK_MM_DISP_PWM1MM 34
> +#define CLK_MM_DISP_PWM126M 35
> +#define CLK_MM_DSI0_ENGINE 36
> +#define CLK_MM_DSI0_DIGITAL 37
> +#define CLK_MM_DSI1_ENGINE 38
> +#define CLK_MM_DSI1_DIGITAL 39
> +#define CLK_MM_DPI_PIXEL 40
> +#define CLK_MM_DPI_ENGINE 41
> +#define CLK_MM_DPI1_PIXEL 42
> +#define CLK_MM_DPI1_ENGINE 43
> +#define CLK_MM_HDMI_PIXEL 44
> +#define CLK_MM_HDMI_PLLCK 45
> +#define CLK_MM_HDMI_AUDIO 46
> +#define CLK_MM_HDMI_SPDIF 47
> +#define CLK_MM_LVDS_PIXEL 48
> +#define CLK_MM_LVDS_CTS 49
> +#define CLK_MM_SMI_LARB4 50
> +#define CLK_MM_HDMI_HDCP 51
> +#define CLK_MM_HDMI_HDCP24M 52
> +#define CLK_MM_NR_CLK 53
> +
> +/* VDEC_SYS */
> +
> +#define CLK_VDEC_CKEN 1
> +#define CLK_VDEC_LARB_CKEN 2
> +#define CLK_VDEC_NR_CLK 3
> +
> +/* VENC_SYS */
> +
> +#define CLK_VENC_CKE0 1
> +#define CLK_VENC_CKE1 2
> +#define CLK_VENC_CKE2 3
> +#define CLK_VENC_CKE3 4
> +#define CLK_VENC_NR_CLK 5
> +
> +/* VENCLT_SYS */
> +
> +#define CLK_VENCLT_CKE0 1
> +#define CLK_VENCLT_CKE1 2
> +#define CLK_VENCLT_NR_CLK 3
> +
> #endif /* _DT_BINDINGS_CLK_MT8173_H */
> --
> 1.8.1.1.dirty
>
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