Re: [PATCH 14/21] clk: at91: sam9x7: add sam9x7 pmc driver

[Simon Horman]

On Sun, Jun 04, 2023 at 01:32:36AM +0530, Varshini Rajendran wrote:
> Add a driver for the PMC clocks of sam9x7 Soc family
> 
> Signed-off-by: Varshini Rajendran <varshini.rajendran@xxxxxxxxxxxxx>

...

> +static void __init sam9x7_pmc_setup(struct device_node *np)
> +{
> +	struct clk_range range = CLK_RANGE(0, 0);
> +	const char *td_slck_name, *md_slck_name, *mainxtal_name;
> +	struct pmc_data *sam9x7_pmc;
> +	const char *parent_names[9];
> +	void **alloc_mem = NULL;
> +	int alloc_mem_size = 0;
> +	struct clk_hw *main_osc_hw;
> +	struct regmap *regmap;
> +	struct clk_hw *hw;
> +	int i, j;
> +
> +	i = of_property_match_string(np, "clock-names", "td_slck");
> +	if (i < 0)
> +		return;
> +
> +	td_slck_name = of_clk_get_parent_name(np, i);
> +
> +	i = of_property_match_string(np, "clock-names", "md_slck");
> +	if (i < 0)
> +		return;
> +
> +	md_slck_name = of_clk_get_parent_name(np, i);
> +
> +	i = of_property_match_string(np, "clock-names", "main_xtal");
> +	if (i < 0)
> +		return;
> +	mainxtal_name = of_clk_get_parent_name(np, i);
> +
> +	regmap = device_node_to_regmap(np);
> +	if (IS_ERR(regmap))
> +		return;
> +
> +	sam9x7_pmc = pmc_data_allocate(PMC_PLLACK + 1,
> +				       nck(sam9x7_systemck),
> +				       nck(sam9x7_periphck),
> +				       nck(sam9x7_gck), 8);
> +	if (!sam9x7_pmc)
> +		return;
> +
> +	alloc_mem = kmalloc(sizeof(void *) *
> +				(ARRAY_SIZE(sam9x7_gck)),
> +				GFP_KERNEL);
> +	if (!alloc_mem)
> +		goto err_free;
> +
> +	hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000,
> +					   50000000);
> +	if (IS_ERR(hw))
> +		goto err_free;
> +
> +	hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, 0);
> +	if (IS_ERR(hw))
> +		goto err_free;
> +	main_osc_hw = hw;
> +
> +	parent_names[0] = "main_rc_osc";
> +	parent_names[1] = "main_osc";
> +	hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, 2);
> +	if (IS_ERR(hw))
> +		goto err_free;
> +
> +	sam9x7_pmc->chws[PMC_MAIN] = hw;
> +
> +	for (i = 0; i < PLL_ID_MAX; i++) {
> +		for (j = 0; j < 3; j++) {
> +			struct clk_hw *parent_hw;
> +
> +			if (!sam9x7_plls[i][j].n)
> +				continue;
> +
> +			switch (sam9x7_plls[i][j].t) {
> +			case PLL_TYPE_FRAC:
> +				if (!strcmp(sam9x7_plls[i][j].p, "mainck"))
> +					parent_hw = sam9x7_pmc->chws[PMC_MAIN];
> +				else if (!strcmp(sam9x7_plls[i][j].p, "main_osc"))
> +					parent_hw = main_osc_hw;
> +				else
> +					parent_hw = __clk_get_hw(of_clk_get_by_name
> +								 (np, sam9x7_plls[i][j].p));
> +
> +				hw = sam9x60_clk_register_frac_pll(regmap,
> +								   &pmc_pll_lock,
> +								   sam9x7_plls[i][j].n,
> +								   sam9x7_plls[i][j].p,
> +								   parent_hw, i,
> +								   sam9x7_plls[i][j].c,
> +								   sam9x7_plls[i][j].l,
> +								   sam9x7_plls[i][j].f);
> +				break;
> +
> +			case PLL_TYPE_DIV:
> +				hw = sam9x60_clk_register_div_pll(regmap,
> +								  &pmc_pll_lock,
> +								  sam9x7_plls[i][j].n,
> +								  sam9x7_plls[i][j].p, i,
> +								  sam9x7_plls[i][j].c,
> +								  sam9x7_plls[i][j].l,
> +								  sam9x7_plls[i][j].f, 0);
> +				break;
> +
> +			default:
> +				continue;
> +			}
> +
> +			if (IS_ERR(hw))
> +				goto err_free;
> +
> +			if (sam9x7_plls[i][j].eid)
> +				sam9x7_pmc->chws[sam9x7_plls[i][j].eid] = hw;
> +		}
> +	}
> +
> +	parent_names[0] = md_slck_name;
> +	parent_names[1] = "mainck";
> +	parent_names[2] = "plla_divpmcck";
> +	parent_names[3] = "upll_divpmcck";
> +	hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4,
> +					   parent_names, &sam9x7_master_layout,
> +					   &mck_characteristics, &mck_lock);
> +	if (IS_ERR(hw))
> +		goto err_free;
> +
> +	hw = at91_clk_register_master_div(regmap, "masterck_div",
> +					  "masterck_pres", &sam9x7_master_layout,
> +					  &mck_characteristics, &mck_lock,
> +					  CLK_SET_RATE_GATE, 0);
> +	if (IS_ERR(hw))
> +		goto err_free;
> +
> +	sam9x7_pmc->chws[PMC_MCK] = hw;
> +
> +	parent_names[0] = "plla_divpmcck";
> +	parent_names[1] = "upll_divpmcck";
> +	parent_names[2] = "main_osc";
> +	hw = sam9x60_clk_register_usb(regmap, "usbck", parent_names, 3);
> +	if (IS_ERR(hw))
> +		goto err_free;
> +
> +	parent_names[0] = md_slck_name;
> +	parent_names[1] = td_slck_name;
> +	parent_names[2] = "mainck";
> +	parent_names[3] = "masterck_div";
> +	parent_names[4] = "plla_divpmcck";
> +	parent_names[5] = "upll_divpmcck";
> +	parent_names[6] = "audiopll_divpmcck";
> +	for (i = 0; i < 2; i++) {
> +		char name[6];
> +
> +		snprintf(name, sizeof(name), "prog%d", i);
> +
> +		hw = at91_clk_register_programmable(regmap, name,
> +						    parent_names, 7, i,
> +						    &sam9x7_programmable_layout,
> +						    NULL);
> +		if (IS_ERR(hw))
> +			goto err_free;
> +
> +		sam9x7_pmc->pchws[i] = hw;
> +	}
> +
> +	for (i = 0; i < ARRAY_SIZE(sam9x7_systemck); i++) {
> +		hw = at91_clk_register_system(regmap, sam9x7_systemck[i].n,
> +					      sam9x7_systemck[i].p,
> +					      sam9x7_systemck[i].id,
> +					      sam9x7_systemck[i].flags);
> +		if (IS_ERR(hw))
> +			goto err_free;
> +
> +		sam9x7_pmc->shws[sam9x7_systemck[i].id] = hw;
> +	}
> +
> +	for (i = 0; i < ARRAY_SIZE(sam9x7_periphck); i++) {
> +		hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock,
> +							 &sam9x7_pcr_layout,
> +							 sam9x7_periphck[i].n,
> +							 "masterck_div",
> +							 sam9x7_periphck[i].id,
> +							 &range, INT_MIN,
> +							 sam9x7_periphck[i].f);
> +		if (IS_ERR(hw))
> +			goto err_free;
> +
> +		sam9x7_pmc->phws[sam9x7_periphck[i].id] = hw;
> +	}
> +
> +	parent_names[0] = md_slck_name;
> +	parent_names[1] = td_slck_name;
> +	parent_names[2] = "mainck";
> +	parent_names[3] = "masterck_div";
> +	for (i = 0; i < ARRAY_SIZE(sam9x7_gck); i++) {
> +		u8 num_parents = 4 + sam9x7_gck[i].pp_count;
> +		u32 *mux_table;
> +
> +		mux_table = kmalloc_array(num_parents, sizeof(*mux_table),
> +					  GFP_KERNEL);
> +		if (!mux_table)
> +			goto err_free;
> +
> +		SAM9X7_INIT_TABLE(mux_table, 4);
> +		SAM9X7_FILL_TABLE(&mux_table[4], sam9x7_gck[i].pp_mux_table,
> +				  sam9x7_gck[i].pp_count);
> +		SAM9X7_FILL_TABLE(&parent_names[4], sam9x7_gck[i].pp,
> +				  sam9x7_gck[i].pp_count);
> +
> +		hw = at91_clk_register_generated(regmap, &pmc_pcr_lock,
> +						 &sam9x7_pcr_layout,
> +						 sam9x7_gck[i].n,
> +						 parent_names, mux_table,
> +						 num_parents,
> +						 sam9x7_gck[i].id,
> +						 &sam9x7_gck[i].r,
> +						 sam9x7_gck[i].pp_chg_id);
> +		if (IS_ERR(hw))
> +			goto err_free;
> +
> +		sam9x7_pmc->ghws[sam9x7_gck[i].id] = hw;
> +		alloc_mem[alloc_mem_size++] = mux_table;
> +	}
> +
> +	of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sam9x7_pmc);
> +

Hi Varshini,

alloc_mem appears to be leaked here.

> +	return;
> +
> +err_free:
> +	if (alloc_mem) {
> +		for (i = 0; i < alloc_mem_size; i++)
> +			kfree(alloc_mem[i]);
> +		kfree(alloc_mem);
> +	}
> +	kfree(sam9x7_pmc);
> +}
> +
> +/* Some clks are used for a clocksource */
> +CLK_OF_DECLARE(sam9x7_pmc, "microchip,sam9x7-pmc", sam9x7_pmc_setup);

I'm sure I'm missing some thing obvious, but I was unable to
find the binding for "microchip,sam9x7-pmc".