On 10.01.2016, at 14:02, Geert Uytterhoeven geert@linux-m68k.org wrote:
I wrote: | Hence it can better be replaced (it seems to be unused in dts files, but you | can keep the definition to be 100% sure) by an ARRAY_SIZE() in the C driver. | This requires changing the driver to e.g. initialize clks[] in |bcm2835_clk_probe() based on a table instead of explicit code.
If you fill in clks[] from a static table, you can take ARRAY_SIZE of the static table.
You mean something like the below? (note: copy/paste from console issues - spaces instead of tabs)
diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c index dee67b3..5ce5e7f 100644 --- a/drivers/clk/bcm/clk-bcm2835.c +++ b/drivers/clk/bcm/clk-bcm2835.c @@ -294,7 +294,7 @@ struct bcm2835_cprman { const char *osc_name;
struct clk_onecell_data onecell; - struct clk *clks[BCM2835_CLOCK_COUNT]; + struct clk *clks[]; };
static inline void cprman_write(struct bcm2835_cprman *cprman, u32 reg, u32 val @@ -496,6 +496,14 @@ static const struct bcm2835_pll_data bcm2835_pllh_data = { .max_fb_rate = BCM2835_MAX_FB_RATE, };
+static const struct bcm2835_pll_data *bcm2835_plls[] = { + [BCM2835_PLLA] = &bcm2835_plla_data, + [BCM2835_PLLB] = &bcm2835_pllb_data, + [BCM2835_PLLC] = &bcm2835_pllc_data, + [BCM2835_PLLD] = &bcm2835_plld_data, + [BCM2835_PLLH] = &bcm2835_pllh_data, +}; + struct bcm2835_pll_divider_data { const char *name; const struct bcm2835_pll_data *source_pll; @@ -625,6 +633,20 @@ static const struct bcm2835_pll_divider_data bcm2835_pllh_p .fixed_divider = 10, };
+static const struct bcm2835_pll_divider_data *bcm2835_pll_divs[] = { + [BCM2835_PLLA_CORE] = &bcm2835_plla_core_data, + [BCM2835_PLLA_PER] = &bcm2835_plla_per_data, + [BCM2835_PLLC_CORE0] = &bcm2835_pllc_core0_data, + [BCM2835_PLLC_CORE1] = &bcm2835_pllc_core1_data, + [BCM2835_PLLC_CORE2] = &bcm2835_pllc_core2_data, + [BCM2835_PLLC_PER] = &bcm2835_pllc_per_data, + [BCM2835_PLLD_CORE] = &bcm2835_plld_core_data, + [BCM2835_PLLD_PER] = &bcm2835_plld_per_data, + [BCM2835_PLLH_RCAL] = &bcm2835_pllh_rcal_data, + [BCM2835_PLLH_AUX] = &bcm2835_pllh_aux_data, + [BCM2835_PLLH_PIX] = &bcm2835_pllh_pix_data, +}; + struct bcm2835_clock_data { const char *name;
@@ -837,6 +859,24 @@ static const struct bcm2835_clock_data bcm2835_clock_pcm_da .mash = 1, };
+static const struct bcm2835_clock_data *bcm2835_clks[] = { + [BCM2835_CLOCK_TIMER] = &bcm2835_clock_timer_data, + [BCM2835_CLOCK_OTP] = &bcm2835_clock_otp_data, + [BCM2835_CLOCK_TSENS] = &bcm2835_clock_tsens_data, + [BCM2835_CLOCK_VPU] = &bcm2835_clock_vpu_data, + [BCM2835_CLOCK_V3D] = &bcm2835_clock_v3d_data, + [BCM2835_CLOCK_ISP] = &bcm2835_clock_isp_data, + [BCM2835_CLOCK_H264] = &bcm2835_clock_h264_data, + [BCM2835_CLOCK_V3D] = &bcm2835_clock_v3d_data, + [BCM2835_CLOCK_SDRAM] = &bcm2835_clock_sdram_data, + [BCM2835_CLOCK_UART] = &bcm2835_clock_uart_data, + [BCM2835_CLOCK_VEC] = &bcm2835_clock_vec_data, + [BCM2835_CLOCK_HSM] = &bcm2835_clock_hsm_data, + [BCM2835_CLOCK_EMMC] = &bcm2835_clock_emmc_data, + [BCM2835_CLOCK_PWM] = &bcm2835_clock_pwm_data, + [BCM2835_CLOCK_PCM] = &bcm2835_clock_pcm_data, +}; + struct bcm2835_pll { struct clk_hw hw; struct bcm2835_cprman *cprman; @@ -1560,8 +1600,13 @@ static int bcm2835_clk_probe(struct platform_device *pdev) struct clk **clks; struct bcm2835_cprman *cprman; struct resource *res; + const int clks_cnt = max(ARRAY_SIZE(bcm2835_plls), + max(ARRAY_SIZE(bcm2835_pll_divs), + ARRAY_SIZE(bcm2835_clks))) + 1; + size_t alloc = sizeof(*cprman) + clks_cnt * sizeof(*clks); + size_t i;
- cprman = devm_kzalloc(dev, sizeof(*cprman), GFP_KERNEL); + cprman = devm_kzalloc(dev, alloc , GFP_KERNEL); if (!cprman) return -ENOMEM;
@@ -1578,67 +1623,43 @@ static int bcm2835_clk_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, cprman);
- cprman->onecell.clk_num = BCM2835_CLOCK_COUNT; + cprman->onecell.clk_num = clks_cnt; cprman->onecell.clks = cprman->clks; clks = cprman->clks;
- clks[BCM2835_PLLA] = bcm2835_register_pll(cprman, &bcm2835_plla_data); - clks[BCM2835_PLLB] = bcm2835_register_pll(cprman, &bcm2835_pllb_data); - clks[BCM2835_PLLC] = bcm2835_register_pll(cprman, &bcm2835_pllc_data); - clks[BCM2835_PLLD] = bcm2835_register_pll(cprman, &bcm2835_plld_data); - clks[BCM2835_PLLH] = bcm2835_register_pll(cprman, &bcm2835_pllh_data); - - clks[BCM2835_PLLA_CORE] = - bcm2835_register_pll_divider(cprman, &bcm2835_plla_core_data); - clks[BCM2835_PLLA_PER] = - bcm2835_register_pll_divider(cprman, &bcm2835_plla_per_data); - clks[BCM2835_PLLC_CORE0] = - bcm2835_register_pll_divider(cprman, &bcm2835_pllc_core0_data); - clks[BCM2835_PLLC_CORE1] = - bcm2835_register_pll_divider(cprman, &bcm2835_pllc_core1_data); - clks[BCM2835_PLLC_CORE2] = - bcm2835_register_pll_divider(cprman, &bcm2835_pllc_core2_data); - clks[BCM2835_PLLC_PER] = - bcm2835_register_pll_divider(cprman, &bcm2835_pllc_per_data); - clks[BCM2835_PLLD_CORE] = - bcm2835_register_pll_divider(cprman, &bcm2835_plld_core_data); - clks[BCM2835_PLLD_PER] = - bcm2835_register_pll_divider(cprman, &bcm2835_plld_per_data); - clks[BCM2835_PLLH_RCAL] = - bcm2835_register_pll_divider(cprman, &bcm2835_pllh_rcal_data); - clks[BCM2835_PLLH_AUX] = - bcm2835_register_pll_divider(cprman, &bcm2835_pllh_aux_data); - clks[BCM2835_PLLH_PIX] = - bcm2835_register_pll_divider(cprman, &bcm2835_pllh_pix_data); - - clks[BCM2835_CLOCK_TIMER] = - bcm2835_register_clock(cprman, &bcm2835_clock_timer_data); - clks[BCM2835_CLOCK_OTP] = - bcm2835_register_clock(cprman, &bcm2835_clock_otp_data); - clks[BCM2835_CLOCK_TSENS] = - bcm2835_register_clock(cprman, &bcm2835_clock_tsens_data); - clks[BCM2835_CLOCK_VPU] = - bcm2835_register_clock(cprman, &bcm2835_clock_vpu_data); - clks[BCM2835_CLOCK_V3D] = - bcm2835_register_clock(cprman, &bcm2835_clock_v3d_data); - clks[BCM2835_CLOCK_ISP] = - bcm2835_register_clock(cprman, &bcm2835_clock_isp_data); - clks[BCM2835_CLOCK_H264] = - bcm2835_register_clock(cprman, &bcm2835_clock_h264_data); - clks[BCM2835_CLOCK_V3D] = - bcm2835_register_clock(cprman, &bcm2835_clock_v3d_data); - clks[BCM2835_CLOCK_SDRAM] = - bcm2835_register_clock(cprman, &bcm2835_clock_sdram_data); - clks[BCM2835_CLOCK_UART] = - bcm2835_register_clock(cprman, &bcm2835_clock_uart_data); - clks[BCM2835_CLOCK_VEC] = - bcm2835_register_clock(cprman, &bcm2835_clock_vec_data); - clks[BCM2835_CLOCK_HSM] = - bcm2835_register_clock(cprman, &bcm2835_clock_hsm_data); - clks[BCM2835_CLOCK_EMMC] = - bcm2835_register_clock(cprman, &bcm2835_clock_emmc_data); - clks[BCM2835_CLOCK_PCM] = - bcm2835_register_clock(cprman, &bcm2835_clock_pcm_data); + /* register pll */ + for(i = 0; i< ARRAY_SIZE(bcm2835_plls); i++) { + if (!bcm2835_plls[i]) + continue; + clks[i] = bcm2835_register_pll( cprman, bcm2835_plls[i]); + } + + /* register pll divider */ + for(i = 0; i< ARRAY_SIZE(bcm2835_pll_divs); i++) { + if (!bcm2835_pll_divs[i]) + continue; + if (clks[i]) { + dev_err(dev, + "Could not register pll_div_id %i - is already defined as: %pC\n", + i, clks[i]); + continue; + } + clks[i] = bcm2835_register_pll_divider(cprman, + bcm2835_pll_divs[i]); + } + + /* register clocks */ + for(i = 0; i< ARRAY_SIZE(bcm2835_clks); i++) { + if (!bcm2835_clks[i]) + continue; + if (clks[i]) { + dev_err(dev, + "Could not register clock_id %i - is already defined as: %pC\n", + i, clks[i]); + continue; + } + clks[i] = bcm2835_register_clock(cprman, bcm2835_clks[i]); + }
/* * CM_PERIICTL (and CM_PERIACTL, CM_SYSCTL and CM_VPUCTL if @@ -1652,8 +1673,6 @@ static int bcm2835_clk_probe(struct platform_device *pdev) cprman->regs + CM_PERIICTL, CM_GATE_BIT, 0, &cprman->regs_lock);
- clks[BCM2835_CLOCK_PWM] = - bcm2835_register_clock(cprman, &bcm2835_clock_pwm_data);
return of_clk_add_provider(dev->of_node, of_clk_src_onecell_get, &cprman->onecell);
If so, then I will send it as a patch plus the PCM patch after I have finished testing the patch.
This patch-set would also include the complete list of clocks still missing from dt-bindings.h as well as the patch that adds all the clock registers, which I had sent earlier.